_create_event(): log event and node ID for debugging

Commit 41274f5525 left us with two if statements
in sequence with exactly the same condition, so consolidate both into a single
statement. Clarify code comments while we're at it.

FAQ.md

@@ -1,9 +1,7 @@
 FAQ - Frequently Asked Questions about repmgr
 =============================================
 
-The repmgr 4 FAQ is located here:
+The repmgr 4 FAQ is located here: [repmgr FAQ (Frequently Asked Questions)](https://repmgr.org/docs/4.0/appendix-faq.html "repmgr FAQ")
-
-    https://repmgr.org/docs/appendix-faq.html
 
 The repmgr 3.x FAQ can be found here:
 

HISTORY

@@ -1,4 +1,65 @@
-4.0.3   2018-02-
+4.0.6   2018-06-14
+        repmgr: (witness register) prevent registration of a witness server with the
+ 		  same name as an existing node (Ian)
+		repmgr: (standby follow) check node has actually connected to new primary
+		  before reporting success; GitHub #444 (Ian)
+		repmgr: (standby clone) improve handling of external configuration file copying,
+		  including consideration in --dry-run check; GitHub #443 (Ian)
+		repmgr: (standby clone) don't require presence of "user" parameter in
+		  conninfo string; GitHub #437 (Ian)
+		repmgr: (standby clone) improve documentation of --recovery-conf-only
+		  mode; GitHub #438 (Ian)
+		repmgr: (node rejoin) fix bug when parsing --config-files parameter;
+		  GitHub #442 (Ian)
+		repmgr: when using --dry-run, force log level to INFO to ensure output
+		  will always be displayed; GitHub #441 (Ian)
+        repmgr: (cluster matrix/crosscheck) return non-zero exit code if node
+           connection issues detected; GitHub #447 (Ian)
+		repmgrd: ensure local node is counted as quorum member; GitHub #439 (Ian)
+
+4.0.5   2018-05-02
+        repmgr: poll demoted primary after restart as a standby during a
+          switchover operation; GitHub #408 (Ian)
+        repmgr: add configuration parameter "config_directory"; GitHub #424 (Ian)
+        repmgr: add "dbname=replication" to all replication connection strings;
+          GitHub #421 (Ian)
+        repmgr: add sanity check if --upstream-node-id not supplied when executing
+          "standby register"; GitHub #395 (Ian)
+        repmgr: enable provision of "archive_cleanup_command" in recovery.conf;
+          GitHub #416 (Ian)
+        repmgr: actively check for node to rejoin cluster; GitHub #415 (Ian)
+        repmgr: enable pg_rewind to be used with PostgreSQL 9.3/9.4; GitHub #413 (Ian)
+        repmgr: fix minimum accepted value for "degraded_monitoring_timeout";
+          GitHub #411 (Ian)
+        repmgr: fix superuser password handling; GitHub #400 (Ian)
+        repmgr: fix parsing of "archive_ready_critical" configuration file
+          parameter; GitHub #426 (Ian)
+        repmgr: fix display of conninfo parsing error messages (Ian)
+        repmgr: fix "repmgr cluster crosscheck" output; GitHub #389 (Ian)
+        repmgrd: prevent standby connection handle from going stale (Ian)
+        repmgrd: fix memory leaks in witness code; GitHub #402 (AndrzejNowicki, Martín)
+        repmgrd: handle "pg_ctl promote" timeout; GitHub #425 (Ian)
+        repmgrd: handle failover situation with only two nodes in the primary
+          location, and at least one node in another location; GitHub #407 (Ian)
+        repmgrd: set "connect_timeout=2" when pinging a server (Ian)
+
+4.0.4   2018-03-09
+        repmgr: add "standby clone --recovery-conf-only" option; GitHub #382 (Ian)
+        repmgr: make "standby promote" timeout values configurable; GitHub #387 (Ian)
+        repmgr: improve replication slot warnings generated by "node status";
+          GitHub #385 (Ian)
+        repmgr: remove restriction on replication slots when cloning from
+          a Barman server; GitHub #379 (Ian)
+        repmgr: ensure "node rejoin" honours "--dry-run" option; GitHub #383 (Ian)
+        repmgr: fix --superuser handling when cloning a standby; GitHub #380 (Ian)
+        repmgr: update various help options; GitHub #391, #392 (hasegeli)
+        repmgrd: add event "repmgrd_shutdown"; GitHub #393 (Ian)
+        repmgrd: improve detection of status change from primary to standby (Ian)
+        repmgrd: improve log output in various situations (Ian)
+        repmgrd: improve reconnection to the local node after a failover (Ian)
+        repmgrd: ensure witness server connects to new primary after a failover (Ian)
+
+4.0.3   2018-02-15
         repmgr: improve switchover handling when "pg_ctl" used to control the
           server and logging output is not explicitly redirected (Ian)
         repmgr: improve switchover log messages and exit code when old primary could
@@ -17,6 +78,7 @@
         repmgr: fix upstream node display in "repmgr node status"; GitHub #363 (fanf2)
         repmgr: improve/clarify documentation and update --help output for
           "primary unregister"; GitHub #373 (Ian)
+        repmgr: allow replication slots when Barman is configured; GitHub #379 (Ian)
         repmgr: fix parsing of "pg_basebackup_options"; GitHub #376 (Ian)
         repmgr: ensure "pg_subtrans" directory is created when cloning a standby in
           Barman mode (Ian)

TODO.md

@@ -0,0 +1,20 @@
+TODO
+====
+
+This file contains a list of improvements which are desireable and/or have
+been requested, and which we aim to address/implement when time and resources
+permit.
+
+It is *not* a roadmap and there's no guarantee of any item being implemented
+within any given timeframe.
+
+
+Enable suspension of repmgrd failover
+-------------------------------------
+
+When performing maintenance, e.g. a switchover, it's necessary to stop all
+repmgrd nodes to prevent unintended failover; this is obviously inconvenient.
+We'll need to implement some way of notifying each repmgrd to suspend automatic
+failover until further notice.
+
+Requested in GitHub #410 ( https://github.com/2ndQuadrant/repmgr/issues/410 )

configfile.c

@@ -288,6 +288,7 @@ _parse_config(t_configuration_options *options, ItemList *error_list, ItemList *
 	memset(options->node_name, 0, sizeof(options->node_name));
 	memset(options->conninfo, 0, sizeof(options->conninfo));
 	memset(options->data_directory, 0, sizeof(options->data_directory));
+	memset(options->config_directory, 0, sizeof(options->data_directory));
 	memset(options->pg_bindir, 0, sizeof(options->pg_bindir));
 	options->replication_type = REPLICATION_TYPE_PHYSICAL;
 
@@ -303,7 +304,7 @@ _parse_config(t_configuration_options *options, ItemList *error_list, ItemList *
 	options->log_status_interval = DEFAULT_LOG_STATUS_INTERVAL;
 
 	/*-----------------------
-	 * standby action settings
+	 * standby clone settings
 	 *------------------------
 	 */
 	options->use_replication_slots = false;
@@ -314,9 +315,24 @@ _parse_config(t_configuration_options *options, ItemList *error_list, ItemList *
 	options->tablespace_mapping.tail = NULL;
 	memset(options->recovery_min_apply_delay, 0, sizeof(options->recovery_min_apply_delay));
 	options->recovery_min_apply_delay_provided = false;
+	memset(options->archive_cleanup_command, 0, sizeof(options->archive_cleanup_command));
 	options->use_primary_conninfo_password = false;
 	memset(options->passfile, 0, sizeof(options->passfile));
 
+	/*-------------------------
+	 * standby promote settings
+	 *-------------------------
+	 */
+	options->promote_check_timeout = DEFAULT_PROMOTE_CHECK_TIMEOUT;
+	options->promote_check_interval = DEFAULT_PROMOTE_CHECK_INTERVAL;
+
+	/*------------------------
+	 * standby follow settings
+	 *------------------------
+	 */
+	options->primary_follow_timeout = DEFAULT_PRIMARY_FOLLOW_TIMEOUT;
+	options->standby_follow_timeout = DEFAULT_STANDBY_FOLLOW_TIMEOUT;
+
 	/*-----------------
 	 * repmgrd settings
 	 *-----------------
@@ -336,7 +352,7 @@ _parse_config(t_configuration_options *options, ItemList *error_list, ItemList *
 	options->degraded_monitoring_timeout = -1;
 	options->async_query_timeout = DEFAULT_ASYNC_QUERY_TIMEOUT;
 	options->primary_notification_timeout = DEFAULT_PRIMARY_NOTIFICATION_TIMEOUT;
-	options->primary_follow_timeout = DEFAULT_PRIMARY_FOLLOW_TIMEOUT;
+	options->standby_reconnect_timeout = DEFAULT_STANDBY_RECONNECT_TIMEOUT;
 
 	/*-------------
 	 * witness settings
@@ -455,6 +471,9 @@ _parse_config(t_configuration_options *options, ItemList *error_list, ItemList *
 			strncpy(options->conninfo, value, MAXLEN);
 		else if (strcmp(name, "data_directory") == 0)
 			strncpy(options->data_directory, value, MAXPGPATH);
+		else if (strcmp(name, "config_directory") == 0)
+			strncpy(options->config_directory, value, MAXPGPATH);
+
 		else if (strcmp(name, "replication_user") == 0)
 		{
 			if (strlen(value) < NAMEDATALEN)
@@ -500,15 +519,30 @@ _parse_config(t_configuration_options *options, ItemList *error_list, ItemList *
 			parse_time_unit_parameter(name, value, options->recovery_min_apply_delay, error_list);
 			options->recovery_min_apply_delay_provided = true;
 		}
+		else if (strcmp(name, "archive_cleanup_command") == 0)
+			strncpy(options->archive_cleanup_command, value, MAXLEN);
 		else if (strcmp(name, "use_primary_conninfo_password") == 0)
 			options->use_primary_conninfo_password = parse_bool(value, name, error_list);
 		else if (strcmp(name, "passfile") == 0)
 			strncpy(options->passfile, value, sizeof(options->passfile));
 
+		/* standby promote settings */
+		else if (strcmp(name, "promote_check_timeout") == 0)
+			options->promote_check_timeout = repmgr_atoi(value, name, error_list, 1);
+
+		else if (strcmp(name, "promote_check_interval") == 0)
+			options->promote_check_interval = repmgr_atoi(value, name, error_list, 1);
+
+		/* standby follow settings */
+		else if (strcmp(name, "primary_follow_timeout") == 0)
+			options->primary_follow_timeout = repmgr_atoi(value, name, error_list, 0);
+		else if (strcmp(name, "standby_follow_timeout") == 0)
+			options->standby_follow_timeout = repmgr_atoi(value, name, error_list, 0);
+
 		/* node check settings */
 		else if (strcmp(name, "archive_ready_warning") == 0)
 			options->archive_ready_warning = repmgr_atoi(value, name, error_list, 1);
-		else if (strcmp(name, "archive_ready_critcial") == 0)
+		else if (strcmp(name, "archive_ready_critical") == 0)
 			options->archive_ready_critical = repmgr_atoi(value, name, error_list, 1);
 		else if (strcmp(name, "replication_lag_warning") == 0)
 			options->replication_lag_warning = repmgr_atoi(value, name, error_list, 1);
@@ -549,13 +583,13 @@ _parse_config(t_configuration_options *options, ItemList *error_list, ItemList *
 		else if (strcmp(name, "monitoring_history") == 0)
 			options->monitoring_history = parse_bool(value, name, error_list);
 		else if (strcmp(name, "degraded_monitoring_timeout") == 0)
-			options->degraded_monitoring_timeout = repmgr_atoi(value, name, error_list, 1);
+			options->degraded_monitoring_timeout = repmgr_atoi(value, name, error_list, -1);
 		else if (strcmp(name, "async_query_timeout") == 0)
 			options->async_query_timeout = repmgr_atoi(value, name, error_list, 0);
 		else if (strcmp(name, "primary_notification_timeout") == 0)
 			options->primary_notification_timeout = repmgr_atoi(value, name, error_list, 0);
-		else if (strcmp(name, "primary_follow_timeout") == 0)
+		else if (strcmp(name, "standby_reconnect_timeout") == 0)
-			options->primary_follow_timeout = repmgr_atoi(value, name, error_list, 0);
+			options->standby_reconnect_timeout = repmgr_atoi(value, name, error_list, 0);
 
 		/* witness settings */
 		else if (strcmp(name, "witness_sync_interval") == 0)
@@ -1028,7 +1062,7 @@ reload_config(t_configuration_options *orig_options)
 		return false;
 	}
 
-	if (strcmp(new_options.node_name, orig_options->node_name) != 0)
+	if (strncmp(new_options.node_name, orig_options->node_name, MAXLEN) != 0)
 	{
 		log_warning(_("\"node_name\" cannot be changed, keeping current configuration"));
 		return false;
@@ -1072,7 +1106,7 @@ reload_config(t_configuration_options *orig_options)
 	}
 
 	/* conninfo */
-	if (strcmp(orig_options->conninfo, new_options.conninfo) != 0)
+	if (strncmp(orig_options->conninfo, new_options.conninfo, MAXLEN) != 0)
 	{
 		/* Test conninfo string works */
 		conn = establish_db_connection(new_options.conninfo, false);
@@ -1099,7 +1133,7 @@ reload_config(t_configuration_options *orig_options)
 	}
 
 	/* event_notification_command */
-	if (strcmp(orig_options->event_notification_command, new_options.event_notification_command) != 0)
+	if (strncmp(orig_options->event_notification_command, new_options.event_notification_command, MAXLEN) != 0)
 	{
 		strncpy(orig_options->event_notification_command, new_options.event_notification_command, MAXLEN);
 		log_info(_("\"event_notification_command\" is now \"%s\""), new_options.event_notification_command);
@@ -1108,7 +1142,7 @@ reload_config(t_configuration_options *orig_options)
 	}
 
 	/* event_notifications */
-	if (strcmp(orig_options->event_notifications_orig, new_options.event_notifications_orig) != 0)
+	if (strncmp(orig_options->event_notifications_orig, new_options.event_notifications_orig, MAXLEN) != 0)
 	{
 		strncpy(orig_options->event_notifications_orig, new_options.event_notifications_orig, MAXLEN);
 		log_info(_("\"event_notifications\" is now \"%s\""), new_options.event_notifications_orig);
@@ -1128,7 +1162,7 @@ reload_config(t_configuration_options *orig_options)
 	}
 
 	/* follow_command */
-	if (strcmp(orig_options->follow_command, new_options.follow_command) != 0)
+	if (strncmp(orig_options->follow_command, new_options.follow_command, MAXLEN) != 0)
 	{
 		strncpy(orig_options->follow_command, new_options.follow_command, MAXLEN);
 		log_info(_("\"follow_command\" is now \"%s\""), new_options.follow_command);
@@ -1165,7 +1199,7 @@ reload_config(t_configuration_options *orig_options)
 
 
 	/* promote_command */
-	if (strcmp(orig_options->promote_command, new_options.promote_command) != 0)
+	if (strncmp(orig_options->promote_command, new_options.promote_command, MAXLEN) != 0)
 	{
 		strncpy(orig_options->promote_command, new_options.promote_command, MAXLEN);
 		log_info(_("\"promote_command\" is now \"%s\""), new_options.promote_command);
@@ -1205,18 +1239,18 @@ reload_config(t_configuration_options *orig_options)
 	 */
 
 	/* log_facility */
-	if (strcmp(orig_options->log_facility, new_options.log_facility) != 0)
+	if (strncmp(orig_options->log_facility, new_options.log_facility, MAXLEN) != 0)
 	{
-		strcpy(orig_options->log_facility, new_options.log_facility);
+		strncpy(orig_options->log_facility, new_options.log_facility, MAXLEN);
 		log_info(_("\"log_facility\" is now \"%s\""), new_options.log_facility);
 
 		log_config_changed = true;
 	}
 
 	/* log_file */
-	if (strcmp(orig_options->log_file, new_options.log_file) != 0)
+	if (strncmp(orig_options->log_file, new_options.log_file, MAXLEN) != 0)
 	{
-		strcpy(orig_options->log_file, new_options.log_file);
+		strncpy(orig_options->log_file, new_options.log_file, MAXLEN);
 		log_info(_("\"log_file\" is now \"%s\""), new_options.log_file);
 
 		log_config_changed = true;
@@ -1224,9 +1258,9 @@ reload_config(t_configuration_options *orig_options)
 
 
 	/* log_level */
-	if (strcmp(orig_options->log_level, new_options.log_level) != 0)
+	if (strncmp(orig_options->log_level, new_options.log_level, MAXLEN) != 0)
 	{
-		strcpy(orig_options->log_level, new_options.log_level);
+		strncpy(orig_options->log_level, new_options.log_level, MAXLEN);
 		log_info(_("\"log_level\" is now \"%s\""), new_options.log_level);
 
 		log_config_changed = true;

configfile.h

@@ -73,6 +73,7 @@ typedef struct
 	char		conninfo[MAXLEN];
 	char		replication_user[NAMEDATALEN];
 	char		data_directory[MAXPGPATH];
+	char		config_directory[MAXPGPATH];
 	char		pg_bindir[MAXPGPATH];
 	int			replication_type;
 
@@ -82,16 +83,25 @@ typedef struct
 	char		log_file[MAXLEN];
 	int			log_status_interval;
 
-	/* standby action settings */
+	/* standby clone settings */
 	bool		use_replication_slots;
 	char		pg_basebackup_options[MAXLEN];
 	char		restore_command[MAXLEN];
 	TablespaceList tablespace_mapping;
 	char		recovery_min_apply_delay[MAXLEN];
 	bool		recovery_min_apply_delay_provided;
+	char		archive_cleanup_command[MAXLEN];
 	bool		use_primary_conninfo_password;
 	char		passfile[MAXPGPATH];
 
+	/* standby promote settings */
+	int			promote_check_timeout;
+	int			promote_check_interval;
+
+	/* standby follow settings */
+	int			primary_follow_timeout;
+	int			standby_follow_timeout;
+
 	/* node check settings */
 	int			archive_ready_warning;
 	int			archive_ready_critical;
@@ -114,7 +124,7 @@ typedef struct
 	int			degraded_monitoring_timeout;
 	int			async_query_timeout;
 	int			primary_notification_timeout;
-	int			primary_follow_timeout;
+	int			standby_reconnect_timeout;
 
 	/* BDR settings */
 	bool		bdr_local_monitoring_only;
@@ -153,11 +163,16 @@ typedef struct
 
 #define T_CONFIGURATION_OPTIONS_INITIALIZER { \
 		/* node information */ \
-		UNKNOWN_NODE_ID, "", "", "", "", "", REPLICATION_TYPE_PHYSICAL,	\
+		UNKNOWN_NODE_ID, "", "", "", "", "", "", REPLICATION_TYPE_PHYSICAL,	\
 		/* log settings */ \
 		"", "", "", DEFAULT_LOG_STATUS_INTERVAL,	\
-		/* standby action settings */ \
+		/* standby clone settings */ \
-		false, "", "", { NULL, NULL }, "", false, false, "",	\
+		false, "", "", { NULL, NULL }, "", false, "", false, "", \
+		/* standby promote settings */ \
+		DEFAULT_PROMOTE_CHECK_TIMEOUT, DEFAULT_PROMOTE_CHECK_INTERVAL, \
+		/* standby follow settings */ \
+		DEFAULT_PRIMARY_FOLLOW_TIMEOUT,	\
+		DEFAULT_STANDBY_FOLLOW_TIMEOUT,	\
 		/* node check settings */ \
 		DEFAULT_ARCHIVE_READY_WARNING, DEFAULT_ARCHIVE_READY_CRITICAL, \
 		DEFAULT_REPLICATION_LAG_WARNING, DEFAULT_REPLICATION_LAG_CRITICAL, \
@@ -171,7 +186,7 @@ typedef struct
         false, -1, \
 		DEFAULT_ASYNC_QUERY_TIMEOUT, \
 		DEFAULT_PRIMARY_NOTIFICATION_TIMEOUT,	\
-		DEFAULT_PRIMARY_FOLLOW_TIMEOUT,	\
+		DEFAULT_STANDBY_RECONNECT_TIMEOUT,	\
 		/* BDR settings */ \
 		false, DEFAULT_BDR_RECOVERY_TIMEOUT, \
 		/* service settings */ \

configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for repmgr 4.0.3.
+# Generated by GNU Autoconf 2.69 for repmgr 4.0.5.
 #
 # Report bugs to <pgsql-bugs@postgresql.org>.
 #
@@ -582,8 +582,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='repmgr'
 PACKAGE_TARNAME='repmgr'
-PACKAGE_VERSION='4.0.3'
+PACKAGE_VERSION='4.0.5'
-PACKAGE_STRING='repmgr 4.0.3'
+PACKAGE_STRING='repmgr 4.0.5'
 PACKAGE_BUGREPORT='pgsql-bugs@postgresql.org'
 PACKAGE_URL='https://2ndquadrant.com/en/resources/repmgr/'
 
@@ -1178,7 +1178,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures repmgr 4.0.3 to adapt to many kinds of systems.
+\`configure' configures repmgr 4.0.5 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1239,7 +1239,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of repmgr 4.0.3:";;
+     short | recursive ) echo "Configuration of repmgr 4.0.5:";;
    esac
   cat <<\_ACEOF
 
@@ -1313,7 +1313,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-repmgr configure 4.0.3
+repmgr configure 4.0.5
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1332,7 +1332,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by repmgr $as_me 4.0.3, which was
+It was created by repmgr $as_me 4.0.5, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -2359,7 +2359,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by repmgr $as_me 4.0.3, which was
+This file was extended by repmgr $as_me 4.0.5, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -2422,7 +2422,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-repmgr config.status 4.0.3
+repmgr config.status 4.0.5
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 

configure.in

@@ -1,4 +1,4 @@
-AC_INIT([repmgr], [4.0.3], [pgsql-bugs@postgresql.org], [repmgr], [https://2ndquadrant.com/en/resources/repmgr/])
+AC_INIT([repmgr], [4.0.6], [pgsql-bugs@postgresql.org], [repmgr], [https://2ndquadrant.com/en/resources/repmgr/])
 
 AC_COPYRIGHT([Copyright (c) 2010-2018, 2ndQuadrant Ltd.])
 

controldata.c

@@ -37,13 +37,8 @@ get_system_identifier(const char *data_directory)
 	uint64		system_identifier = UNKNOWN_SYSTEM_IDENTIFIER;
 
 	control_file_info = get_controlfile(data_directory);
+	system_identifier = control_file_info->system_identifier;
 
-	if (control_file_info->control_file_processed == true)
-		system_identifier = control_file_info->control_file->system_identifier;
-	else
-		system_identifier = UNKNOWN_SYSTEM_IDENTIFIER;
-
-	pfree(control_file_info->control_file);
 	pfree(control_file_info);
 
 	return system_identifier;
@@ -57,13 +52,8 @@ get_db_state(const char *data_directory)
 
 	control_file_info = get_controlfile(data_directory);
 
-	if (control_file_info->control_file_processed == true)
+	state = control_file_info->state;
-		state = control_file_info->control_file->state;
-	else
-		/* if we were unable to parse the control file, assume DB is shut down */
-		state = DB_SHUTDOWNED;
 
-	pfree(control_file_info->control_file);
 	pfree(control_file_info);
 
 	return state;
@@ -78,12 +68,8 @@ get_latest_checkpoint_location(const char *data_directory)
 
 	control_file_info = get_controlfile(data_directory);
 
-	if (control_file_info->control_file_processed == false)
+	checkPoint = control_file_info->checkPoint;
-		return InvalidXLogRecPtr;
 
-	checkPoint = control_file_info->control_file->checkPoint;
-
-	pfree(control_file_info->control_file);
 	pfree(control_file_info);
 
 	return checkPoint;
@@ -98,16 +84,8 @@ get_data_checksum_version(const char *data_directory)
 
 	control_file_info = get_controlfile(data_directory);
 
-	if (control_file_info->control_file_processed == false)
+	data_checksum_version = (int) control_file_info->data_checksum_version;
-	{
-		data_checksum_version = -1;
-	}
-	else
-	{
-		data_checksum_version = (int) control_file_info->control_file->data_checksum_version;
-	}
 
-	pfree(control_file_info->control_file);
 	pfree(control_file_info);
 
 	return data_checksum_version;
@@ -139,33 +117,109 @@ describe_db_state(DBState state)
 
 
 /*
- * we maintain our own version of get_controlfile() as we need cross-version
+ * We maintain our own version of get_controlfile() as we need cross-version
  * compatibility, and also don't care if the file isn't readable.
  */
 static ControlFileInfo *
 get_controlfile(const char *DataDir)
 {
 	ControlFileInfo *control_file_info;
-	int			fd;
+	FILE	   *fp = NULL;
+	int			fd, ret, version_num;
+	char		PgVersionPath[MAXPGPATH] = "";
 	char		ControlFilePath[MAXPGPATH] = "";
+	char		file_version_string[64] = "";
+	long		file_major, file_minor;
+	char	   *endptr = NULL;
+	void	   *ControlFileDataPtr = NULL;
+	int			expected_size = 0;
 
 	control_file_info = palloc0(sizeof(ControlFileInfo));
+
+	/* set default values */
 	control_file_info->control_file_processed = false;
-	control_file_info->control_file = palloc0(sizeof(ControlFileData));
+	control_file_info->system_identifier = UNKNOWN_SYSTEM_IDENTIFIER;
+	control_file_info->state = DB_SHUTDOWNED;
+	control_file_info->checkPoint = InvalidXLogRecPtr;
+	control_file_info->data_checksum_version = -1;
+
+	/*
+	 * Read PG_VERSION, as we'll need to determine which struct to read
+	 * the control file contents into
+	 */
+	snprintf(PgVersionPath, MAXPGPATH, "%s/PG_VERSION", DataDir);
+
+	fp = fopen(PgVersionPath, "r");
+
+	if (fp == NULL)
+	{
+		log_warning(_("could not open file \"%s\" for reading"),
+					PgVersionPath);
+		log_detail("%s", strerror(errno));
+		return control_file_info;
+	}
+
+	file_version_string[0] = '\0';
+
+	ret = fscanf(fp, "%63s", file_version_string);
+	fclose(fp);
+
+	if (ret != 1 || endptr == file_version_string)
+	{
+		log_warning(_("unable to determine major version number from PG_VERSION"));
+
+		return control_file_info;
+	}
+
+	file_major = strtol(file_version_string, &endptr, 10);
+	file_minor = 0;
+
+	if (*endptr == '.')
+		file_minor = strtol(endptr + 1, NULL, 10);
+
+	version_num = ((int) file_major * 10000) + ((int) file_minor * 100);
+
+	if (version_num < 90300)
+	{
+		log_warning(_("Data directory appears to be initialised for %s"), file_version_string);
+		return control_file_info;
+	}
+
 
 	snprintf(ControlFilePath, MAXPGPATH, "%s/global/pg_control", DataDir);
 
 	if ((fd = open(ControlFilePath, O_RDONLY | PG_BINARY, 0)) == -1)
 	{
-		log_debug("could not open file \"%s\" for reading: %s",
+		log_warning(_("could not open file \"%s\" for reading"),
-				  ControlFilePath, strerror(errno));
+					ControlFilePath);
+		log_detail("%s", strerror(errno));
 		return control_file_info;
 	}
 
-	if (read(fd, control_file_info->control_file, sizeof(ControlFileData)) != sizeof(ControlFileData))
+
+	if (version_num >= 90500)
 	{
-		log_debug("could not read file \"%s\": %s",
+		expected_size = sizeof(ControlFileData95);
-				  ControlFilePath, strerror(errno));
+		ControlFileDataPtr = palloc0(expected_size);
+	}
+	else if (version_num >= 90400)
+	{
+		expected_size = sizeof(ControlFileData94);
+		ControlFileDataPtr = palloc0(expected_size);
+	}
+	else if (version_num >= 90300)
+	{
+		expected_size = sizeof(ControlFileData93);
+		ControlFileDataPtr = palloc0(expected_size);
+	}
+
+
+	if (read(fd, ControlFileDataPtr, expected_size) != expected_size)
+	{
+		log_warning(_("could not read file \"%s\""),
+					ControlFilePath);
+		log_detail("%s", strerror(errno));
+
 		return control_file_info;
 	}
 
@@ -173,6 +227,33 @@ get_controlfile(const char *DataDir)
 
 	control_file_info->control_file_processed = true;
 
+	if (version_num >= 90500)
+	{
+		ControlFileData95 *ptr = (struct ControlFileData95 *)ControlFileDataPtr;
+		control_file_info->system_identifier = ptr->system_identifier;
+		control_file_info->state = ptr->state;
+		control_file_info->checkPoint = ptr->checkPoint;
+		control_file_info->data_checksum_version = ptr->data_checksum_version;
+	}
+	else if (version_num >= 90400)
+	{
+		ControlFileData94 *ptr = (struct ControlFileData94 *)ControlFileDataPtr;
+		control_file_info->system_identifier = ptr->system_identifier;
+		control_file_info->state = ptr->state;
+		control_file_info->checkPoint = ptr->checkPoint;
+		control_file_info->data_checksum_version = ptr->data_checksum_version;
+	}
+	else if (version_num >= 90300)
+	{
+		ControlFileData93 *ptr = (struct ControlFileData93 *)ControlFileDataPtr;
+		control_file_info->system_identifier = ptr->system_identifier;
+		control_file_info->state = ptr->state;
+		control_file_info->checkPoint = ptr->checkPoint;
+		control_file_info->data_checksum_version = ptr->data_checksum_version;
+	}
+
+	pfree(ControlFileDataPtr);
+
 	/*
 	 * We don't check the CRC here as we're potentially checking a pg_control
 	 * file from a different PostgreSQL version to the one repmgr was compiled

controldata.h

@@ -12,12 +12,261 @@
 #include "postgres_fe.h"
 #include "catalog/pg_control.h"
 
+/*
+ * A simplified representation of pg_control containing only those fields
+ * required by repmgr.
+ */
 typedef struct
 {
 	bool		control_file_processed;
-	ControlFileData *control_file;
+	uint64		system_identifier;
+	DBState		state;
+	XLogRecPtr	checkPoint;
+	uint32		data_checksum_version;
 } ControlFileInfo;
 
+
+
+/* Same for 9.3, 9.4 */
+typedef struct CheckPoint93
+{
+	XLogRecPtr	redo;			/* next RecPtr available when we began to
+								 * create CheckPoint (i.e. REDO start point) */
+	TimeLineID	ThisTimeLineID; /* current TLI */
+	TimeLineID	PrevTimeLineID; /* previous TLI, if this record begins a new
+								 * timeline (equals ThisTimeLineID otherwise) */
+	bool		fullPageWrites; /* current full_page_writes */
+	uint32		nextXidEpoch;	/* higher-order bits of nextXid */
+	TransactionId nextXid;		/* next free XID */
+	Oid			nextOid;		/* next free OID */
+	MultiXactId nextMulti;		/* next free MultiXactId */
+	MultiXactOffset nextMultiOffset;	/* next free MultiXact offset */
+	TransactionId oldestXid;	/* cluster-wide minimum datfrozenxid */
+	Oid			oldestXidDB;	/* database with minimum datfrozenxid */
+	MultiXactId oldestMulti;	/* cluster-wide minimum datminmxid */
+	Oid			oldestMultiDB;	/* database with minimum datminmxid */
+	pg_time_t	time;			/* time stamp of checkpoint */
+
+	TransactionId oldestActiveXid;
+} CheckPoint93;
+
+
+/* Same for 9.5, 9.6, 10, HEAD */
+typedef struct CheckPoint95
+{
+	XLogRecPtr	redo;			/* next RecPtr available when we began to
+								 * create CheckPoint (i.e. REDO start point) */
+	TimeLineID	ThisTimeLineID; /* current TLI */
+	TimeLineID	PrevTimeLineID; /* previous TLI, if this record begins a new
+								 * timeline (equals ThisTimeLineID otherwise) */
+	bool		fullPageWrites; /* current full_page_writes */
+	uint32		nextXidEpoch;	/* higher-order bits of nextXid */
+	TransactionId nextXid;		/* next free XID */
+	Oid			nextOid;		/* next free OID */
+	MultiXactId nextMulti;		/* next free MultiXactId */
+	MultiXactOffset nextMultiOffset;	/* next free MultiXact offset */
+	TransactionId oldestXid;	/* cluster-wide minimum datfrozenxid */
+	Oid			oldestXidDB;	/* database with minimum datfrozenxid */
+	MultiXactId oldestMulti;	/* cluster-wide minimum datminmxid */
+	Oid			oldestMultiDB;	/* database with minimum datminmxid */
+	pg_time_t	time;			/* time stamp of checkpoint */
+	TransactionId oldestCommitTsXid;	/* oldest Xid with valid commit
+										 * timestamp */
+	TransactionId newestCommitTsXid;	/* newest Xid with valid commit
+										 * timestamp */
+
+	TransactionId oldestActiveXid;
+} CheckPoint95;
+
+
+typedef struct ControlFileData93
+{
+	uint64		system_identifier;
+
+	uint32		pg_control_version;		/* PG_CONTROL_VERSION */
+	uint32		catalog_version_no;		/* see catversion.h */
+
+	DBState		state;			/* see enum above */
+	pg_time_t	time;			/* time stamp of last pg_control update */
+	XLogRecPtr	checkPoint;		/* last check point record ptr */
+	XLogRecPtr	prevCheckPoint; /* previous check point record ptr */
+
+	CheckPoint93	checkPointCopy; /* copy of last check point record */
+
+	XLogRecPtr	unloggedLSN;	/* current fake LSN value, for unlogged rels */
+
+	XLogRecPtr	minRecoveryPoint;
+	TimeLineID	minRecoveryPointTLI;
+	XLogRecPtr	backupStartPoint;
+	XLogRecPtr	backupEndPoint;
+	bool		backupEndRequired;
+
+	int			wal_level;
+	int			MaxConnections;
+	int			max_prepared_xacts;
+	int			max_locks_per_xact;
+
+	uint32		maxAlign;		/* alignment requirement for tuples */
+	double		floatFormat;	/* constant 1234567.0 */
+
+	uint32		blcksz;			/* data block size for this DB */
+	uint32		relseg_size;	/* blocks per segment of large relation */
+
+	uint32		xlog_blcksz;	/* block size within WAL files */
+	uint32		xlog_seg_size;	/* size of each WAL segment */
+
+	uint32		nameDataLen;	/* catalog name field width */
+	uint32		indexMaxKeys;	/* max number of columns in an index */
+
+	uint32		toast_max_chunk_size;	/* chunk size in TOAST tables */
+
+	/* flag indicating internal format of timestamp, interval, time */
+	bool		enableIntTimes; /* int64 storage enabled? */
+
+	/* flags indicating pass-by-value status of various types */
+	bool		float4ByVal;	/* float4 pass-by-value? */
+	bool		float8ByVal;	/* float8, int8, etc pass-by-value? */
+
+	/* Are data pages protected by checksums? Zero if no checksum version */
+	uint32		data_checksum_version;
+
+} ControlFileData93;
+
+
+/*
+ * Following fields added since 9.3:
+ *
+ * 	int			max_worker_processes;
+ *  int			max_prepared_xacts;
+ *  int			max_locks_per_xact;
+ *
+ */
+typedef struct ControlFileData94
+{
+	uint64		system_identifier;
+
+	uint32		pg_control_version;		/* PG_CONTROL_VERSION */
+	uint32		catalog_version_no;		/* see catversion.h */
+
+	DBState		state;			/* see enum above */
+	pg_time_t	time;			/* time stamp of last pg_control update */
+	XLogRecPtr	checkPoint;		/* last check point record ptr */
+	XLogRecPtr	prevCheckPoint; /* previous check point record ptr */
+
+	CheckPoint93	checkPointCopy; /* copy of last check point record */
+
+	XLogRecPtr	unloggedLSN;	/* current fake LSN value, for unlogged rels */
+
+	XLogRecPtr	minRecoveryPoint;
+	TimeLineID	minRecoveryPointTLI;
+	XLogRecPtr	backupStartPoint;
+	XLogRecPtr	backupEndPoint;
+	bool		backupEndRequired;
+
+	int			wal_level;
+	bool		wal_log_hints;
+	int			MaxConnections;
+	int			max_worker_processes;
+	int			max_prepared_xacts;
+	int			max_locks_per_xact;
+
+	uint32		maxAlign;		/* alignment requirement for tuples */
+	double		floatFormat;	/* constant 1234567.0 */
+
+	uint32		blcksz;			/* data block size for this DB */
+	uint32		relseg_size;	/* blocks per segment of large relation */
+
+	uint32		xlog_blcksz;	/* block size within WAL files */
+	uint32		xlog_seg_size;	/* size of each WAL segment */
+
+	uint32		nameDataLen;	/* catalog name field width */
+	uint32		indexMaxKeys;	/* max number of columns in an index */
+
+	uint32		toast_max_chunk_size;	/* chunk size in TOAST tables */
+	uint32		loblksize;		/* chunk size in pg_largeobject */
+
+	bool		enableIntTimes; /* int64 storage enabled? */
+
+	bool		float4ByVal;	/* float4 pass-by-value? */
+	bool		float8ByVal;	/* float8, int8, etc pass-by-value? */
+
+	/* Are data pages protected by checksums? Zero if no checksum version */
+	uint32		data_checksum_version;
+
+} ControlFileData94;
+
+
+
+/*
+ * Following field added since 9.4:
+ *
+ *	bool		track_commit_timestamp;
+ *
+ * Unchanged in 9.6
+ *
+ * In 10, following field appended *after* "data_checksum_version":
+ *
+ *	char		mock_authentication_nonce[MOCK_AUTH_NONCE_LEN];
+ *
+ * (but we don't care about that)
+ */
+
+typedef struct ControlFileData95
+{
+	uint64		system_identifier;
+
+	uint32		pg_control_version;		/* PG_CONTROL_VERSION */
+	uint32		catalog_version_no;		/* see catversion.h */
+
+	DBState		state;			/* see enum above */
+	pg_time_t	time;			/* time stamp of last pg_control update */
+	XLogRecPtr	checkPoint;		/* last check point record ptr */
+	XLogRecPtr	prevCheckPoint; /* previous check point record ptr */
+
+	CheckPoint95	checkPointCopy; /* copy of last check point record */
+
+	XLogRecPtr	unloggedLSN;	/* current fake LSN value, for unlogged rels */
+
+	XLogRecPtr	minRecoveryPoint;
+	TimeLineID	minRecoveryPointTLI;
+	XLogRecPtr	backupStartPoint;
+	XLogRecPtr	backupEndPoint;
+	bool		backupEndRequired;
+
+	int			wal_level;
+	bool		wal_log_hints;
+	int			MaxConnections;
+	int			max_worker_processes;
+	int			max_prepared_xacts;
+	int			max_locks_per_xact;
+	bool		track_commit_timestamp;
+
+	uint32		maxAlign;		/* alignment requirement for tuples */
+	double		floatFormat;	/* constant 1234567.0 */
+
+	uint32		blcksz;			/* data block size for this DB */
+	uint32		relseg_size;	/* blocks per segment of large relation */
+
+	uint32		xlog_blcksz;	/* block size within WAL files */
+	uint32		xlog_seg_size;	/* size of each WAL segment */
+
+	uint32		nameDataLen;	/* catalog name field width */
+	uint32		indexMaxKeys;	/* max number of columns in an index */
+
+	uint32		toast_max_chunk_size;	/* chunk size in TOAST tables */
+	uint32		loblksize;		/* chunk size in pg_largeobject */
+
+	bool		enableIntTimes; /* int64 storage enabled? */
+
+	bool		float4ByVal;	/* float4 pass-by-value? */
+	bool		float8ByVal;	/* float8, int8, etc pass-by-value? */
+
+	uint32		data_checksum_version;
+
+} ControlFileData95;
+
+
+
 extern DBState get_db_state(const char *data_directory);
 extern const char *describe_db_state(DBState state);
 extern int	get_data_checksum_version(const char *data_directory);

dbutils.c

@@ -23,6 +23,7 @@
 #include <sys/time.h>
 #include <sys/stat.h>
 #include <dirent.h>
+#include <arpa/inet.h>
 
 #include "repmgr.h"
 #include "dbutils.h"
@@ -124,7 +125,7 @@ _establish_db_connection(const char *conninfo, const bool exit_on_error, const b
 
 	initialize_conninfo_params(&conninfo_params, false);
 
-	parse_success = parse_conninfo_string(conninfo, &conninfo_params, errmsg, false);
+	parse_success = parse_conninfo_string(conninfo, &conninfo_params, &errmsg, false);
 
 	if (parse_success == false)
 	{
@@ -219,8 +220,7 @@ establish_db_connection_quiet(const char *conninfo)
 }
 
 
-PGconn
+PGconn *
-		   *
 establish_primary_db_connection(PGconn *conn,
 								const bool exit_on_error)
 {
@@ -237,36 +237,6 @@ establish_primary_db_connection(PGconn *conn,
 }
 
 
-PGconn *
-establish_db_connection_as_user(const char *conninfo,
-								const char *user,
-								const bool exit_on_error)
-{
-	PGconn	   *conn = NULL;
-	t_conninfo_param_list conninfo_params = T_CONNINFO_PARAM_LIST_INITIALIZER;
-	bool		parse_success = false;
-	char	   *errmsg = NULL;
-
-	initialize_conninfo_params(&conninfo_params, false);
-
-	parse_success = parse_conninfo_string(conninfo, &conninfo_params, errmsg, true);
-
-	if (parse_success == false)
-	{
-		log_error(_("unable to pass provided conninfo string:\n	 %s"), errmsg);
-		return NULL;
-	}
-
-	param_set(&conninfo_params, "user", user);
-
-	conn = establish_db_connection_by_params(&conninfo_params, false);
-
-	return conn;
-}
-
-
-
-
 PGconn *
 establish_db_connection_by_params(t_conninfo_param_list *param_list,
 								  const bool exit_on_error)
@@ -342,6 +312,18 @@ is_superuser_connection(PGconn *conn, t_connection_user *userinfo)
 }
 
 
+void
+close_connection(PGconn **conn)
+{
+	if (*conn == NULL)
+		return;
+
+	PQfinish(*conn);
+
+	*conn = NULL;
+}
+
+
 /* =============================== */
 /* conninfo manipulation functions */
 /* =============================== */
@@ -389,6 +371,37 @@ get_conninfo_value(const char *conninfo, const char *keyword, char *output)
 }
 
 
+/*
+ * Get a default conninfo value for the provided parameter, and copy
+ * it to the 'output' buffer.
+ *
+ * Returns true on success, or false on failure (provided keyword not found).
+ *
+ */
+bool
+get_conninfo_default_value(const char *param, char *output, int maxlen)
+{
+	PQconninfoOption *defs = NULL;
+	PQconninfoOption *def = NULL;
+	bool found = false;
+
+	defs = PQconndefaults();
+
+	for (def = defs; def->keyword; def++)
+	{
+		if (strncmp(def->keyword, param, maxlen) == 0)
+		{
+			strncpy(output, def->val, maxlen);
+			found = true;
+		}
+	}
+
+	PQconninfoFree(defs);
+
+	return found;
+}
+
+
 void
 initialize_conninfo_params(t_conninfo_param_list *param_list, bool set_defaults)
 {
@@ -572,7 +585,7 @@ param_get(t_conninfo_param_list *param_list, const char *param)
 /*
  * Parse a conninfo string into a t_conninfo_param_list
  *
- * See conn_to_param_list() to do the same for a PQconn
+ * See conn_to_param_list() to do the same for a PGconn
  *
  * "ignore_local_params": ignores those parameters specific
  * to a local installation, i.e. when parsing an upstream
@@ -580,12 +593,12 @@ param_get(t_conninfo_param_list *param_list, const char *param)
  * don't copy that node's values
  */
 bool
-parse_conninfo_string(const char *conninfo_str, t_conninfo_param_list *param_list, char *errmsg, bool ignore_local_params)
+parse_conninfo_string(const char *conninfo_str, t_conninfo_param_list *param_list, char **errmsg, bool ignore_local_params)
 {
 	PQconninfoOption *connOptions = NULL;
 	PQconninfoOption *option = NULL;
 
-	connOptions = PQconninfoParse(conninfo_str, &errmsg);
+	connOptions = PQconninfoParse(conninfo_str, errmsg);
 
 	if (connOptions == NULL)
 		return false;
@@ -616,10 +629,19 @@ parse_conninfo_string(const char *conninfo_str, t_conninfo_param_list *param_lis
 	return true;
 }
 
+
 /*
- * Parse a PQconn into a t_conninfo_param_list
+ * Parse a PGconn into a t_conninfo_param_list
  *
  * See parse_conninfo_string() to do the same for a conninfo string
+ *
+ * NOTE: the current use case for this is to take an active connection,
+ * replace the existing username (typically replacing it with the superuser
+ * or replication user name), and make a new connection as that user.
+ * If the "password" field is set, it will cause any connection made with
+ * these parameters to fail (unless of course the password happens to be the
+ * same). Therefore we remove the password altogether, and rely on it being
+ * available via .pgpass.
  */
 void
 conn_to_param_list(PGconn *conn, t_conninfo_param_list *param_list)
@@ -635,6 +657,10 @@ conn_to_param_list(PGconn *conn, t_conninfo_param_list *param_list)
 			(option->val != NULL && option->val[0] == '\0'))
 			continue;
 
+		/* Ignore "password" */
+		if (strcmp(option->keyword, "password") == 0)
+			continue;
+
 		param_set(param_list, option->keyword, option->val);
 	}
 
@@ -1015,7 +1041,7 @@ get_cluster_size(PGconn *conn, char *size)
 
 	initPQExpBuffer(&query);
 	appendPQExpBuffer(&query,
-					  "SELECT pg_catalog.pg_size_pretty(SUM(pg_catalog.pg_database_size(oid))::bigint) "
+					  "SELECT pg_catalog.pg_size_pretty(pg_catalog.sum(pg_catalog.pg_database_size(oid))::bigint) "
 					  "	 FROM pg_catalog.pg_database ");
 
 	log_verbose(LOG_DEBUG, "get_cluster_size():\n%s", query.data);
@@ -1060,7 +1086,7 @@ get_server_version(PGconn *conn, char *server_version)
 	}
 
 	if (server_version != NULL)
-		strcpy(server_version, PQgetvalue(res, 0, 1));
+		strncpy(server_version, PQgetvalue(res, 0, 1), MAXVERSIONSTR);
 
 	server_version_num = atoi(PQgetvalue(res, 0, 0));
 
@@ -1358,67 +1384,6 @@ get_replication_info(PGconn *conn, ReplInfo *replication_info)
 }
 
 
-bool
-can_use_pg_rewind(PGconn *conn, const char *data_directory, PQExpBufferData *reason)
-{
-	bool		can_use = true;
-
-	if (server_version_num == UNKNOWN_SERVER_VERSION_NUM)
-		server_version_num = get_server_version(conn, NULL);
-
-	if (server_version_num < 90500)
-	{
-		appendPQExpBuffer(reason,
-						  _("pg_rewind available from PostgreSQL 9.5"));
-		return false;
-	}
-
-	if (guc_set(conn, "full_page_writes", "=", "off"))
-	{
-		if (can_use == false)
-			appendPQExpBuffer(reason, "; ");
-
-		appendPQExpBuffer(reason,
-						  _("\"full_page_writes\" must be set to \"on\""));
-
-		can_use = false;
-	}
-
-	/*
-	 * "wal_log_hints" off - are data checksums available? Note: we're
-	 * checking the local pg_control file here as the value will be the same
-	 * throughout the cluster and saves a round-trip to the demotion
-	 * candidate.
-	 */
-	if (guc_set(conn, "wal_log_hints", "=", "on") == false)
-	{
-		int			data_checksum_version = get_data_checksum_version(data_directory);
-
-		if (data_checksum_version < 0)
-		{
-			if (can_use == false)
-				appendPQExpBuffer(reason, "; ");
-
-			appendPQExpBuffer(reason,
-							  _("\"wal_log_hints\" is set to \"off\" but unable to determine checksum version"));
-			can_use = false;
-		}
-		else if (data_checksum_version == 0)
-		{
-			if (can_use == false)
-				appendPQExpBuffer(reason, "; ");
-
-			appendPQExpBuffer(reason,
-							  _("\"wal_log_hints\" is set to \"off\" and checksums are disabled"));
-
-			can_use = false;
-		}
-	}
-
-	return can_use;
-}
-
-
 int
 get_ready_archive_files(PGconn *conn, const char *data_directory)
 {
@@ -1800,10 +1765,10 @@ _populate_node_record(PGresult *res, t_node_info *node_info, int row)
 	strncpy(node_info->location, PQgetvalue(res, row, 7), MAXLEN);
 	node_info->priority = atoi(PQgetvalue(res, row, 8));
 	node_info->active = atobool(PQgetvalue(res, row, 9));
-	strncpy(node_info->config_file, PQgetvalue(res, row, 10), MAXLEN);
+	strncpy(node_info->config_file, PQgetvalue(res, row, 10), MAXPGPATH);
 
 	/* This won't normally be set */
-	strncpy(node_info->upstream_node_name, PQgetvalue(res, row, 10), MAXLEN);
+	strncpy(node_info->upstream_node_name, PQgetvalue(res, row, 11), MAXLEN);
 
 	/* Set remaining struct fields with default values */
 	node_info->node_status = NODE_STATUS_UNKNOWN;
@@ -1887,6 +1852,36 @@ get_node_record(PGconn *conn, int node_id, t_node_info *node_info)
 }
 
 
+RecordStatus
+get_node_record_with_upstream(PGconn *conn, int node_id, t_node_info *node_info)
+{
+	PQExpBufferData query;
+	RecordStatus result;
+
+	initPQExpBuffer(&query);
+	appendPQExpBuffer(&query,
+					  "    SELECT n.node_id, n.type, n.upstream_node_id, n.node_name, n.conninfo, n.repluser, "
+					  "           n.slot_name, n.location, n.priority, n.active, n.config_file, un.node_name AS upstream_node_name "
+					  "      FROM repmgr.nodes n "
+					  " LEFT JOIN repmgr.nodes un "
+					  "        ON un.node_id = n.upstream_node_id"
+					  " WHERE n.node_id = %i",
+					  node_id);
+
+	log_verbose(LOG_DEBUG, "get_node_record():\n  %s", query.data);
+
+	result = _get_node_record(conn, query.data, node_info);
+	termPQExpBuffer(&query);
+
+	if (result == RECORD_NOT_FOUND)
+	{
+		log_verbose(LOG_DEBUG, "get_node_record(): no record found for node %i", node_id);
+	}
+
+	return result;
+}
+
+
 RecordStatus
 get_node_record_by_name(PGconn *conn, const char *node_name, t_node_info *node_info)
 {
@@ -2140,7 +2135,7 @@ get_all_node_records_with_upstream(PGconn *conn, NodeInfoList *node_list)
 
 	appendPQExpBuffer(&query,
 					  "    SELECT n.node_id, n.type, n.upstream_node_id, n.node_name, n.conninfo, n.repluser, "
-					  "           n.slot_name, n.location, n.priority, n.active, un.node_name AS upstream_node_name "
+					  "           n.slot_name, n.location, n.priority, n.active, n.config_file, un.node_name AS upstream_node_name "
 					  "      FROM repmgr.nodes n "
 					  " LEFT JOIN repmgr.nodes un "
 					  "        ON un.node_id = n.upstream_node_id"
@@ -2170,7 +2165,7 @@ get_all_node_records_with_upstream(PGconn *conn, NodeInfoList *node_list)
 
 
 bool
-get_downsteam_nodes_with_missing_slot(PGconn *conn, int this_node_id, NodeInfoList *node_list)
+get_downstream_nodes_with_missing_slot(PGconn *conn, int this_node_id, NodeInfoList *node_list)
 {
 	PQExpBufferData query;
 	PGresult   *res = NULL;
@@ -2181,9 +2176,10 @@ get_downsteam_nodes_with_missing_slot(PGconn *conn, int this_node_id, NodeInfoLi
 					  "   SELECT " REPMGR_NODES_COLUMNS
 					  "     FROM repmgr.nodes n "
 					  "LEFT JOIN pg_catalog.pg_replication_slots rs "
-					  "       ON rs.slot_name = n.node_name "
+					  "       ON rs.slot_name = n.slot_name "
-					  "    WHERE rs.slot_name IS NULL "
+					  "    WHERE n.slot_name IS NOT NULL"
-                      "      AND n.node_id != %i ",
+                      "      AND rs.slot_name IS NULL "
+                      "      AND n.upstream_node_id = %i ",
 					  this_node_id);
 
 	log_verbose(LOG_DEBUG, "get_all_node_records_with_missing_slot():\n%s", query.data);
@@ -2347,8 +2343,7 @@ update_node_record_set_active(PGconn *conn, int this_node_id, bool active)
 
 	initPQExpBuffer(&query);
 
-	appendPQExpBuffer(
+	appendPQExpBuffer(&query,
-					  &query,
 					  "UPDATE repmgr.nodes SET active = %s "
 					  " WHERE node_id = %i",
 					  active == true ? "TRUE" : "FALSE",
@@ -2373,6 +2368,40 @@ update_node_record_set_active(PGconn *conn, int this_node_id, bool active)
 }
 
 
+bool
+update_node_record_set_active_standby(PGconn *conn, int this_node_id)
+{
+	PQExpBufferData query;
+	PGresult   *res = NULL;
+
+	initPQExpBuffer(&query);
+
+	appendPQExpBuffer(&query,
+					  "UPDATE repmgr.nodes "
+					  "   SET type = 'standby', "
+					  "       active = TRUE "
+					  " WHERE node_id = %i",
+					  this_node_id);
+
+	log_verbose(LOG_DEBUG, "update_node_record_set_active_standby():\n  %s", query.data);
+
+	res = PQexec(conn, query.data);
+	termPQExpBuffer(&query);
+
+	if (PQresultStatus(res) != PGRES_COMMAND_OK)
+	{
+		log_error(_("unable to update node record:\n  %s"),
+				  PQerrorMessage(conn));
+		PQclear(res);
+		return false;
+	}
+
+	PQclear(res);
+
+	return true;
+}
+
+
 bool
 update_node_record_set_primary(PGconn *conn, int this_node_id)
 {
@@ -2390,7 +2419,9 @@ update_node_record_set_primary(PGconn *conn, int this_node_id)
 					  "  UPDATE repmgr.nodes "
 					  "     SET active = FALSE "
 					  "   WHERE type = 'primary' "
-					  "     AND active IS TRUE ");
+					  "     AND active IS TRUE "
+					  "     AND node_id != %i ",
+					  this_node_id);
 
 	res = PQexec(conn, query.data);
 	termPQExpBuffer(&query);
@@ -2412,7 +2443,8 @@ update_node_record_set_primary(PGconn *conn, int this_node_id)
 	appendPQExpBuffer(&query,
 					  "  UPDATE repmgr.nodes"
 					  "     SET type = 'primary', "
-					  "         upstream_node_id = NULL "
+					  "         upstream_node_id = NULL, "
+					  "         active = TRUE "
 					  "   WHERE node_id = %i ",
 					  this_node_id);
 
@@ -2575,9 +2607,11 @@ witness_copy_node_records(PGconn *primary_conn, PGconn *witness_conn)
 		log_error(_("unable to defer constraints:\n  %s"),
 				  PQerrorMessage(witness_conn));
 		rollback_transaction(witness_conn);
+		PQclear(res);
 
 		return false;
 	}
+	PQclear(res);
 
 	/* truncate existing records */
 
@@ -2598,6 +2632,8 @@ witness_copy_node_records(PGconn *primary_conn, PGconn *witness_conn)
 	/* and done */
 	commit_transaction(witness_conn);
 
+	clear_node_info_list(&nodes);
+
 	return true;
 }
 
@@ -2612,7 +2648,7 @@ delete_node_record(PGconn *conn, int node)
 
 	appendPQExpBuffer(&query,
 					  "DELETE FROM repmgr.nodes "
-					  " WHERE node_id = %d",
+					  " WHERE node_id = %i",
 					  node);
 
 	log_verbose(LOG_DEBUG, "delete_node_record():\n  %s", query.data);
@@ -2682,6 +2718,7 @@ update_node_record_slot_name(PGconn *primary_conn, int node_id, char *slot_name)
 	return true;
 }
 
+
 void
 get_node_replication_stats(PGconn *conn, int server_version_num, t_node_info *node_info)
 {
@@ -2696,14 +2733,14 @@ get_node_replication_stats(PGconn *conn, int server_version_num, t_node_info *no
 	initPQExpBuffer(&query);
 
 	appendPQExpBuffer(&query,
-					  " SELECT current_setting('max_wal_senders')::INT AS max_wal_senders, "
+					  " SELECT pg_catalog.current_setting('max_wal_senders')::INT AS max_wal_senders, "
-					  "        (SELECT COUNT(*) FROM pg_catalog.pg_stat_replication) AS attached_wal_receivers, ");
+					  "        (SELECT pg_catalog.count(*) FROM pg_catalog.pg_stat_replication) AS attached_wal_receivers, ");
 
 	/* no replication slots in PostgreSQL 9.3 */
 	if (server_version_num < 90400)
 	{
 		appendPQExpBuffer(&query,
-						  "        0 AS  max_replication_slots, "
+						  "        0 AS max_replication_slots, "
 						  "        0 AS total_replication_slots, "
 						  "        0 AS active_replication_slots, "
 						  "        0 AS inactive_replication_slots, ");
@@ -2712,16 +2749,16 @@ get_node_replication_stats(PGconn *conn, int server_version_num, t_node_info *no
 	{
 		appendPQExpBuffer(&query,
 						  "        current_setting('max_replication_slots')::INT AS max_replication_slots, "
-						  "        (SELECT COUNT(*) FROM pg_catalog.pg_replication_slots) AS total_replication_slots, "
+						  "        (SELECT pg_catalog.count(*) FROM pg_catalog.pg_replication_slots) AS total_replication_slots, "
-						  "        (SELECT COUNT(*) FROM pg_catalog.pg_replication_slots WHERE active IS TRUE)  AS active_replication_slots, "
+						  "        (SELECT pg_catalog.count(*) FROM pg_catalog.pg_replication_slots WHERE active IS TRUE)  AS active_replication_slots, "
-						  "        (SELECT COUNT(*) FROM pg_catalog.pg_replication_slots WHERE active IS FALSE) AS inactive_replication_slots, ");
+						  "        (SELECT pg_catalog.count(*) FROM pg_catalog.pg_replication_slots WHERE active IS FALSE) AS inactive_replication_slots, ");
 	}
 
 
 	appendPQExpBuffer(&query,
 					  "        pg_catalog.pg_is_in_recovery() AS in_recovery");
 
-
+	log_verbose(LOG_DEBUG, "get_node_replication_stats():\n%s", query.data);
 
 	res = PQexec(conn, query.data);
 	termPQExpBuffer(&query);
@@ -2758,7 +2795,7 @@ is_downstream_node_attached(PGconn *conn, char *node_name)
 	initPQExpBuffer(&query);
 
 	appendPQExpBuffer(&query,
-					  " SELECT COUNT(*) FROM pg_catalog.pg_stat_replication "
+					  " SELECT pg_catalog.count(*) FROM pg_catalog.pg_stat_replication "
 					  "  WHERE application_name = '%s'",
 					  node_name);
 	res = PQexec(conn, query.data);
@@ -2848,21 +2885,21 @@ get_datadir_configuration_files(PGconn *conn, KeyValueList *list)
 	appendPQExpBuffer(&query,
 					  "WITH files AS ( "
 					  "  WITH dd AS ( "
-					  "    SELECT setting "
+					  "   SELECT setting "
 					  "     FROM pg_catalog.pg_settings "
 					  "    WHERE name = 'data_directory') "
-					  " SELECT distinct(sourcefile) AS config_file"
+					  "   SELECT distinct(sourcefile) AS config_file"
-					  "   FROM dd, pg_catalog.pg_settings ps "
+					  "     FROM dd, pg_catalog.pg_settings ps "
-					  "  WHERE ps.sourcefile IS NOT NULL "
+					  "    WHERE ps.sourcefile IS NOT NULL "
-					  "    AND ps.sourcefile ~ ('^' || dd.setting) "
+					  "      AND ps.sourcefile ~ ('^' || dd.setting) "
-					  "     UNION "
+					  "       UNION "
-					  "  SELECT ps.setting  AS config_file"
+					  "   SELECT ps.setting  AS config_file"
-					  "    FROM dd, pg_catalog.pg_settings ps "
+					  "     FROM dd, pg_catalog.pg_settings ps "
-					  "   WHERE ps.name IN ( 'config_file', 'hba_file', 'ident_file') "
+					  "    WHERE ps.name IN ('config_file', 'hba_file', 'ident_file') "
-					  "     AND ps.setting ~ ('^' || dd.setting) "
+					  "      AND ps.setting ~ ('^' || dd.setting) "
 					  ") "
 					  "  SELECT config_file, "
-					  "         regexp_replace(config_file, '^.*\\/','') AS filename "
+					  "         pg_catalog.regexp_replace(config_file, '^.*\\/','') AS filename "
 					  "    FROM files "
 					  "ORDER BY config_file");
 
@@ -2955,7 +2992,7 @@ get_configuration_file_locations(PGconn *conn, t_configfile_list *list)
 					  "     WHERE name = 'data_directory' "
 					  "  ) "
 					  "    SELECT ps.setting, "
-					  "           regexp_replace(setting, '^.*\\/', '') AS filename, "
+					  "           pg_catalog.regexp_replace(setting, '^.*\\/', '') AS filename, "
 					  "           ps.setting ~ ('^' || dd.data_directory) AS in_data_dir "
 					  "      FROM dd, pg_catalog.pg_settings ps "
 					  "     WHERE ps.name IN ('hba_file', 'ident_file') "
@@ -3105,6 +3142,8 @@ _create_event(PGconn *conn, t_configuration_options *options, int node_id, char
 	char		event_timestamp[MAXLEN] = "";
 	bool		success = true;
 
+	log_verbose(LOG_DEBUG, "_create_event(): event is \"%s\" for node %i", event, node_id);
+
 	/*
 	 * Only attempt to write a record if a connection handle was provided.
 	 * Also check that the repmgr schema has been properly initialised - if
@@ -3372,7 +3411,7 @@ get_event_records(PGconn *conn, int node_id, const char *node_name, const char *
 	/* LEFT JOIN used here as a node record may have been removed */
 	appendPQExpBuffer(&query,
 					  "   SELECT e.node_id, n.node_name, e.event, e.successful, "
-					  "          TO_CHAR(e.event_timestamp, 'YYYY-MM-DD HH24:MI:SS') AS timestamp, "
+					  "          pg_catalog.to_char(e.event_timestamp, 'YYYY-MM-DD HH24:MI:SS') AS timestamp, "
 					  "          e.details "
 					  "     FROM repmgr.events e "
 					  "LEFT JOIN repmgr.nodes n ON e.node_id = n.node_id ");
@@ -3461,6 +3500,9 @@ create_replication_slot(PGconn *conn, char *slot_name, int server_version_num, P
 	PGresult   *res = NULL;
 	t_replication_slot slot_info = T_REPLICATION_SLOT_INITIALIZER;
 
+	if (server_version_num == UNKNOWN_SERVER_VERSION_NUM)
+		server_version_num = get_server_version(conn, NULL);
+
 	/*
 	 * Check whether slot exists already; if it exists and is active, that
 	 * means another active standby is using it, which creates an error
@@ -3622,7 +3664,7 @@ get_free_replication_slots(PGconn *conn)
 
 	appendPQExpBuffer(&query,
 					  " SELECT pg_catalog.current_setting('max_replication_slots')::INT - "
-					  "        COUNT(*) AS free_slots"
+					  "        pg_catalog.count(*) AS free_slots"
 					  "   FROM pg_catalog.pg_replication_slots");
 
 	res = PQexec(conn, query.data);
@@ -3817,6 +3859,45 @@ is_server_available(const char *conninfo)
 }
 
 
+bool
+is_server_available_params(t_conninfo_param_list *param_list)
+{
+	PGPing		status = PQpingParams((const char **) param_list->keywords,
+									  (const char **) param_list->values,
+									  false);
+
+	/* deparsing the param_list adds overhead, so only do it if needed  */
+	if (log_level == LOG_DEBUG)
+	{
+		char *conninfo_str = param_list_to_string(param_list);
+		log_verbose(LOG_DEBUG, "ping status for %s is %i", conninfo_str, (int)status);
+		pfree(conninfo_str);
+	}
+
+	if (status == PQPING_OK)
+		return true;
+
+	return false;
+}
+
+
+
+/*
+ * Simple throw-away query to stop a connection handle going stale
+ */
+void
+connection_ping(PGconn *conn)
+{
+	PGresult   *res = PQexec(conn, "SELECT TRUE");
+
+	log_verbose(LOG_DEBUG, "connection_ping(): result is %s", PQresStatus(PQresultStatus(res)));
+
+	PQclear(res);
+	return;
+}
+
+
+
 /* ==================== */
 /* monitoring functions */
 /* ==================== */
@@ -3901,9 +3982,9 @@ get_number_of_monitoring_records_to_delete(PGconn *primary_conn, int keep_histor
 	initPQExpBuffer(&query);
 
 	appendPQExpBuffer(&query,
-					  "SELECT COUNT(*) "
+					  "SELECT pg_catalog.count(*) "
 					  "  FROM repmgr.monitoring_history "
-					  " WHERE age(now(), last_monitor_time) >= '%d days'::interval",
+					  " WHERE pg_catalog.age(pg_catalog.now(), last_monitor_time) >= '%d days'::interval",
 					  keep_history);
 
 	res = PQexec(primary_conn, query.data);
@@ -3942,7 +4023,7 @@ delete_monitoring_records(PGconn *primary_conn, int keep_history)
 	{
 		appendPQExpBuffer(&query,
 						  "DELETE FROM repmgr.monitoring_history "
-						  " WHERE age(now(), last_monitor_time) >= '%d days'::interval ",
+						  " WHERE pg_catalog.age(pg_catalog.now(), last_monitor_time) >= '%d days'::interval ",
 						  keep_history);
 	}
 	else
@@ -4240,7 +4321,7 @@ _is_bdr_db(PGconn *conn, PQExpBufferData *output, bool quiet)
 	initPQExpBuffer(&query);
 
 	appendPQExpBuffer(&query,
-					  "SELECT COUNT(*) FROM pg_catalog.pg_extension WHERE extname='bdr'");
+					  "SELECT pg_catalog.count(*) FROM pg_catalog.pg_extension WHERE extname='bdr'");
 
 	res = PQexec(conn, query.data);
 	termPQExpBuffer(&query);
@@ -4353,7 +4434,7 @@ is_bdr_repmgr(PGconn *conn)
 	initPQExpBuffer(&query);
 
 	appendPQExpBuffer(&query,
-					  "SELECT COUNT(*)"
+					  "SELECT pg_catalog.count(*)"
 					  "  FROM repmgr.nodes n"
 					  " WHERE n.type != 'bdr' ");
 
@@ -4384,8 +4465,8 @@ is_table_in_bdr_replication_set(PGconn *conn, const char *tablename, const char
 	initPQExpBuffer(&query);
 
 	appendPQExpBuffer(&query,
-					  "SELECT COUNT(*) "
+					  "SELECT pg_catalog.count(*) "
-					  "  FROM UNNEST(bdr.table_get_replication_sets('repmgr.%s')) AS repset "
+					  "  FROM pg_catalog.unnest(bdr.table_get_replication_sets('repmgr.%s')) AS repset "
 					  " WHERE repset='%s' ",
 					  tablename,
 					  set);
@@ -4763,8 +4844,8 @@ bdr_node_has_repmgr_set(PGconn *conn, const char *node_name)
 	initPQExpBuffer(&query);
 
 	appendPQExpBuffer(&query,
-					  " SELECT COUNT(*) "
+					  " SELECT pg_catalog.count(*) "
-					  "   FROM UNNEST(bdr.connection_get_replication_sets('%s') AS repset "
+					  "   FROM pg_catalog.unnest(bdr.connection_get_replication_sets('%s') AS repset "
 					  "  WHERE repset = 'repmgr'",
 					  node_name);
 
@@ -4799,7 +4880,7 @@ bdr_node_set_repmgr_set(PGconn *conn, const char *node_name)
 					  " SELECT bdr.connection_set_replication_sets( "
 					  "   ARRAY( "
 					  "     SELECT repset::TEXT "
-					  "       FROM UNNEST(bdr.connection_get_replication_sets('%s')) AS repset "
+					  "       FROM pg_catalog.unnest(bdr.connection_get_replication_sets('%s')) AS repset "
 					  "         UNION "
 					  "     SELECT 'repmgr'::TEXT "
 					  "   ), "

dbutils.h

@@ -343,9 +343,6 @@ bool		atobool(const char *value);
 PGconn *establish_db_connection(const char *conninfo,
 						const bool exit_on_error);
 PGconn	   *establish_db_connection_quiet(const char *conninfo);
-PGconn *establish_db_connection_as_user(const char *conninfo,
-								const char *user,
-								const bool exit_on_error);
 
 PGconn *establish_db_connection_by_params(t_conninfo_param_list *param_list,
 								  const bool exit_on_error);
@@ -356,10 +353,11 @@ PGconn	   *get_primary_connection(PGconn *standby_conn, int *primary_id, char *p
 PGconn	   *get_primary_connection_quiet(PGconn *standby_conn, int *primary_id, char *primary_conninfo_out);
 
 bool		is_superuser_connection(PGconn *conn, t_connection_user *userinfo);
+void		close_connection(PGconn **conn);
 
 /* conninfo manipulation functions */
 bool		get_conninfo_value(const char *conninfo, const char *keyword, char *output);
-
+bool		get_conninfo_default_value(const char *param, char *output, int maxlen);
 void		initialize_conninfo_params(t_conninfo_param_list *param_list, bool set_defaults);
 void		free_conninfo_params(t_conninfo_param_list *param_list);
 void		copy_conninfo_params(t_conninfo_param_list *dest_list, t_conninfo_param_list *source_list);
@@ -367,10 +365,11 @@ void		conn_to_param_list(PGconn *conn, t_conninfo_param_list *param_list);
 void		param_set(t_conninfo_param_list *param_list, const char *param, const char *value);
 void		param_set_ine(t_conninfo_param_list *param_list, const char *param, const char *value);
 char	   *param_get(t_conninfo_param_list *param_list, const char *param);
-bool		parse_conninfo_string(const char *conninfo_str, t_conninfo_param_list *param_list, char *errmsg, bool ignore_local_params);
+bool		parse_conninfo_string(const char *conninfo_str, t_conninfo_param_list *param_list, char **errmsg, bool ignore_local_params);
 char	   *param_list_to_string(t_conninfo_param_list *param_list);
 bool		has_passfile(void);
 
+
 /* transaction functions */
 bool		begin_transaction(PGconn *conn);
 bool		commit_transaction(PGconn *conn);
@@ -389,7 +388,6 @@ bool		get_cluster_size(PGconn *conn, char *size);
 int			get_server_version(PGconn *conn, char *server_version);
 RecoveryType get_recovery_type(PGconn *conn);
 int			get_primary_node_id(PGconn *conn);
-bool		can_use_pg_rewind(PGconn *conn, const char *data_directory, PQExpBufferData *reason);
 int			get_ready_archive_files(PGconn *conn, const char *data_directory);
 bool		identify_system(PGconn *repl_conn, t_system_identification *identification);
 bool		repmgrd_set_local_node_id(PGconn *conn, int local_node_id);
@@ -408,6 +406,8 @@ t_server_type parse_node_type(const char *type);
 const char *get_node_type_string(t_server_type type);
 
 RecordStatus get_node_record(PGconn *conn, int node_id, t_node_info *node_info);
+RecordStatus get_node_record_with_upstream(PGconn *conn, int node_id, t_node_info *node_info);
+
 RecordStatus get_node_record_by_name(PGconn *conn, const char *node_name, t_node_info *node_info);
 t_node_info *get_node_record_pointer(PGconn *conn, int node_id);
 
@@ -419,7 +419,7 @@ void		get_downstream_node_records(PGconn *conn, int node_id, NodeInfoList *nodes
 void		get_active_sibling_node_records(PGconn *conn, int node_id, int upstream_node_id, NodeInfoList *node_list);
 void		get_node_records_by_priority(PGconn *conn, NodeInfoList *node_list);
 bool		get_all_node_records_with_upstream(PGconn *conn, NodeInfoList *node_list);
-bool		get_downsteam_nodes_with_missing_slot(PGconn *conn, int this_node_id, NodeInfoList *noede_list);
+bool		get_downstream_nodes_with_missing_slot(PGconn *conn, int this_node_id, NodeInfoList *noede_list);
 
 bool		create_node_record(PGconn *conn, char *repmgr_action, t_node_info *node_info);
 bool		update_node_record(PGconn *conn, char *repmgr_action, t_node_info *node_info);
@@ -428,6 +428,7 @@ bool		truncate_node_records(PGconn *conn);
 
 bool		update_node_record_set_active(PGconn *conn, int this_node_id, bool active);
 bool		update_node_record_set_primary(PGconn *conn, int this_node_id);
+bool		update_node_record_set_active_standby(PGconn *conn, int this_node_id);
 bool		update_node_record_set_upstream(PGconn *conn, int this_node_id, int new_upstream_node_id);
 bool		update_node_record_status(PGconn *conn, int this_node_id, char *type, int upstream_node_id, bool active);
 bool		update_node_record_conn_priority(PGconn *conn, t_configuration_options *options);
@@ -465,6 +466,8 @@ int			wait_connection_availability(PGconn *conn, long long timeout);
 
 /* node availability functions */
 bool		is_server_available(const char *conninfo);
+bool		is_server_available_params(t_conninfo_param_list *param_list);
+void		connection_ping(PGconn *conn);
 
 /* monitoring functions  */
 void

doc/appendix-faq.sgml

@@ -24,8 +24,9 @@
       series will no longer be actively maintained.
      </para>
      <para>
-      repmgr 2.x supports PostgreSQL 9.0 ~ 9.3. While it is compatible
+      &repmgr; 2.x supports PostgreSQL 9.0 ~ 9.3. While it is compatible
-      with PostgreSQL 9.3, we recommend using repmgr 4.x.
+      with PostgreSQL 9.3, we recommend using repmgr 4.x. &repmgr; 2.x is
+      no longer maintained.
      </para>
   </sect2>
 
@@ -35,7 +36,7 @@
     Replication slots, introduced in PostgreSQL 9.4, ensure that the
     primary server will retain WAL files until they have been consumed
     by all standby servers. This makes WAL file management much easier,
-    and if used `repmgr` will no longer insist on a fixed minimum number
+    and if used &repmgr; will no longer insist on a fixed minimum number
     (default: 5000) of WAL files being retained.
    </para>
    <para>
@@ -69,12 +70,50 @@
     in a streaming replication cluster.
    </para>
   </sect2>
+
+  <sect2 id="faq-upgrades" xreflabel="Upgrading PostgreSQL with repmgr">
+   <title>Can &repmgr; assist with upgrading a PostgreSQL cluster?</title>
+   <para>
+     For <emphasis>minor</emphasis> version upgrades, e.g. from 9.6.7 to 9.6.8, a common
+     approach is to upgrade a standby to the latest version, perform a
+     <link linkend="performing-switchover">switchover</link> promoting it to a primary,
+     then upgrade the former primary.
+   </para>
+   <para>
+     For <emphasis>major</emphasis> version upgrades (e.g. from PostgreSQL 9.6 to PostgreSQL 10),
+     the traditional approach is to "reseed" a cluster by upgrading a single
+     node with <ulink url="https://www.postgresql.org/docs/current/static/pgupgrade.html">pg_upgrade</ulink>
+     and recloning standbys from this.
+   </para>
+   <para>
+     To minimize downtime during major upgrades, for more recent PostgreSQL
+     versions (PostgreSQL 9.4 and later),
+     <ulink url="https://www.2ndquadrant.com/en/resources/pglogical/">pglogical</ulink>
+     can be used to set up a parallel cluster using the newer PostgreSQL version,
+     which can be kept in sync with the existing production cluster until the
+     new cluster is ready to be put into production.
+   </para>
+  </sect2>
+
+  <sect2 id="faq-libdir-repmgr-error">
+   <title>What does this error mean: <literal>ERROR: could not access file "$libdir/repmgr"</literal>?</title>
+   <para>
+     It means the &repmgr; extension code is not installed in the
+     PostgreSQL application directory. This typically happens when using PostgreSQL
+     packages provided by a third-party vendor, which often have different
+     filesystem layouts.
+   </para>
+   <para>
+     Either use PostgreSQL packages provided by the community or 2ndQuadrant; if this
+     is not possible, contact your vendor for assistance.
+   </para>
+  </sect2>
  </sect1>
 
  <sect1 id="faq-repmgr" xreflabel="repmgr">
   <title><command>repmgr</command></title>
 
-  <sect2 id="faq-register-existing-node" xreflabel="">
+  <sect2 id="faq-register-existing-node" xreflabel="registering an existing node">
    <title>Can I register an existing PostgreSQL server with repmgr?</title>
    <para>
     Yes, any existing PostgreSQL server which is part of the same replication
@@ -83,6 +122,26 @@
    </para>
   </sect2>
 
+  <sect2 id="faq-repmgr-clone-other-source" >
+   <title>Can I use a standby not cloned by &repmgr; as a &repmgr; node?</title>
+
+   <para>
+     For a standby which has been manually cloned or recovered from an external
+     backup manager such as Barman, the command
+     <command><link linkend="repmgr-standby-clone">repmgr standby clone --recovery-conf-only</link></command>
+     can be used to create the correct <filename>recovery.conf</filename> file for
+     use with &repmgr; (and will create a replication slot if required). Once this has been done,
+     <link linkend="repmgr-standby-register">register the node</link> as usual.
+   </para>
+  </sect2>
+
+  <sect2 id="faq-repmgr-recovery-conf" >
+    <title>What does &repmgr; write in <filename>recovery.conf</filename>, and what options can be set there?</title>
+   <para>
+     See section <link linkend="repmgr-standby-clone-recovery-conf">Customising recovery.conf</link>.
+   </para>
+  </sect2>
+
   <sect2 id="faq-repmgr-failed-primary-standby" xreflabel="Reintegrate a failed primary as a standby">
    <title>How can a failed primary be re-added as a standby?</title>
    <para>
@@ -91,19 +150,23 @@
     needs to be re-registered as a standby.
    </para>
    <para>
-    In PostgreSQL 9.5 and later, it's possible to use <command>pg_rewind</command>
+    It's possible to use <command>pg_rewind</command> to re-synchronise the existing data
-    to re-synchronise the existing data directory, which will usually be much
+    directory, which will usually be much
     faster than re-cloning the server. However <command>pg_rewind</command> can only
     be used if PostgreSQL either has <varname>wal_log_hints</varname> enabled, or
     data checksums were enabled when the cluster was initialized.
    </para>
    <para>
-    &repmgr; provides the command <command>repmgr node rejoin</command> which can
+     Note that <command>pg_rewind</command> is available as part of the core PostgreSQL
-    optionally execute <command>pg_rewind</command>; see the <xref linkend="repmgr-node-rejoin">
+     distribution from PostgreSQL 9.5, and as a third-party utility for PostgreSQL 9.3 and 9.4.
-    documentation for details.
    </para>
    <para>
-    If <command>pg_rewind</command> cannot be used, then the data directory will have
+    &repmgr; provides the command <command>repmgr node rejoin</command> which can
+    optionally execute <command>pg_rewind</command>; see the <xref linkend="repmgr-node-rejoin">
+    documentation for details, in particular the section <xref linkend="repmgr-node-rejoin-pg-rewind">.
+   </para>
+   <para>
+    If <command>pg_rewind</command> cannot be used, then the data directory will need
     to be re-cloned from scratch.
    </para>
 
@@ -180,6 +243,9 @@
    </para>
   </sect2>
 
+
+
+
  </sect1>
 
  <sect1 id="faq-repmgrd" xreflabel="repmgrd">

doc/appendix-packages.sgml

@@ -1,48 +1,119 @@
 <appendix id="appendix-packages" xreflabel="Package details">
- <indexterm>
+  <indexterm>
-  <primary>packages</primary>
+    <primary>packages</primary>
- </indexterm>
+  </indexterm>
 
- <title>&repmgr; package details</title>
+  <title>&repmgr; package details</title>
- <para>
-   This section provides technical details about various &repmgr; binary
-   packages, such as location of the installed binaries and
-   configuration files.
- </para>
-
- <sect1 id="packages-centos" xreflabel="CentOS packages">
-  <title>CentOS, RHEL, Scientific Linux etc.</title>
   <para>
-    Currently packages are provided for versions 6.x and 7.x of CentOS et al.
+    This section provides technical details about various &repmgr; binary
+    packages, such as location of the installed binaries and
+    configuration files.
   </para>
 
-  <note>
+  <sect1 id="packages-centos" xreflabel="CentOS packages">
+    <title>CentOS Packages</title>
+    <indexterm>
+      <primary>packages</primary>
+      <secondary>CentOS packages</secondary>
+    </indexterm>
     <para>
-      For PostgreSQL 9.6 and lower, the CentOS packages use a mixture of <literal>9.6</literal>
+      Currently, &repmgr; RPM packages are provided for versions 6.x and 7.x of CentOS. These should also
-      and <literal>96</literal> in various places to designate the major version;
+      work on matching versions of Red Hat Enterprise Linux, Scientific Linux and Oracle Enterprise Linux;
-      from PostgreSQL 10, the first part of the version number (e.g. <literal>10</literal>) is
+      together with CentOS, these are the same RedHat-based distributions for which the main community project
-      the major version, so there is more consistency in file/path/package naming.
+      (PGDG) provides packages (see the <ulink url="https://yum.postgresql.org/">PostgreSQL RPM Building Project</ulink>
+      page for details).
     </para>
-  </note>
+
+    <para>
+      Note these &repmgr; RPM packages are not designed to work with SuSE/OpenSuSE.
+    </para>
+
+    <note>
+      <para>
+        &repmgr; packages are designed to be compatible with community-provided PostgreSQL packages.
+        They may not work with vendor-specific packages such as those provided by RedHat for RHEL
+        customers, as the filesystem layout may be different to the community RPMs.
+        Please contact your support vendor for assistance.
+      </para>
+    </note>
+
+    <sect2 id="packages-centos-repositories">
+      <title>CentOS repositories</title>
+
+      <para>
+        &repmgr; packages are available from the public 2ndQuadrant repository, and also the
+        PostgreSQL community repository. The 2ndQuadrant repository is updated immediately
+        after each
+        &repmgr; release.
+      </para>
+
+      <table id="centos-2ndquadrant-repository">
+        <title>2ndQuadrant public repository</title>
+        <tgroup cols="2">
+          <tbody>
+            <row>
+              <entry>Repository URL:</entry>
+              <entry><ulink url="https://rpm.2ndquadrant.com/">https://rpm.2ndquadrant.com/</ulink></entry>
+            </row>
+            <row>
+              <entry>Repository documentation:</entry>
+              <entry><ulink url="https://repmgr.org/docs/4.0/installation-packages.html#INSTALLATION-PACKAGES-REDHAT-2NDQ">https://repmgr.org/docs/4.0/installation-packages.html#INSTALLATION-PACKAGES-REDHAT-2NDQ</ulink></entry>
+            </row>
+          </tbody>
+        </tgroup>
+      </table>
+
+      <table id="centos-pgdg-repository">
+        <title>PostgreSQL community repository (PGDG)</title>
+        <tgroup cols="2">
+          <tbody>
+            <row>
+              <entry>Repository URL:</entry>
+              <entry><ulink url="https://yum.postgresql.org/repopackages.php">https://yum.postgresql.org/repopackages.php</ulink></entry>
+            </row>
+            <row>
+              <entry>Repository documentation:</entry>
+              <entry><ulink url="https://yum.postgresql.org/">https://yum.postgresql.org/</ulink></entry>
+            </row>
+          </tbody>
+        </tgroup>
+      </table>
+
+    </sect2>
+
+    <sect2 id="packages-centos-details">
+      <title>CentOS package details</title>
+
+      <para>
+        The two tables below list relevant information, paths, commands etc. for the &repmgr; packages on
+        CentOS 7 (with systemd) and CentOS 6 (no systemd). Substitute the appropriate PostgreSQL major
+        version number for your installation.
+      </para>
+
+      <note>
+        <para>
+          For PostgreSQL 9.6 and lower, the CentOS packages use a mixture of <literal>9.6</literal>
+          and <literal>96</literal> in various places to designate the major version; e.g. the
+          package name is <literal>repmgr96</literal>, but the binary directory is
+          <filename>/var/lib/pgsql/9.6/data</filename>.
+        </para>
+        <para>
+          From PostgreSQL 10, the first part of the version number (e.g. <literal>10</literal>) is
+          the major version, so there is more consistency in file/path/package naming
+          (package <literal>repmgr10</literal>, binary directory <filename>/var/lib/pgsql/10/data</filename>).
+        </para>
+      </note>
+
 
   <table id="centos-7-packages">
    <title>CentOS 7 packages</title>
 
    <tgroup cols="2">
     <tbody>
-     <row>
-      <entry>Repository URL:</entry>
-      <entry><ulink url="https://yum.postgresql.org/repopackages.php">https://yum.postgresql.org/repopackages.php</ulink></entry>
-     </row>
-
-     <row>
-      <entry>Repository documentation:</entry>
-      <entry><ulink url="https://yum.postgresql.org/">https://yum.postgresql.org/</ulink></entry>
-     </row>
 
      <row>
       <entry>Package name example:</entry>
-      <entry><filename>repmgr10-4.0.0-1.rhel7.x86_64</filename></entry>
+      <entry><filename>repmgr10-4.0.4-1.rhel7.x86_64</filename></entry>
      </row>
 
      <row>
@@ -52,7 +123,7 @@
 
      <row>
       <entry>Installation command:</entry>
-      <entry><literal>yum install -y repmgr10</literal></entry>
+      <entry><literal>yum install repmgr10</literal></entry>
      </row>
 
      <row>
@@ -61,7 +132,7 @@
      </row>
 
      <row>
-      <entry>In default path:</entry>
+      <entry>repmgr in default path:</entry>
       <entry>NO</entry>
      </row>
 
@@ -70,9 +141,14 @@
       <entry><filename>/etc/repmgr/10/repmgr.conf</filename></entry>
      </row>
 
+     <row>
+      <entry>Data directory:</entry>
+      <entry><filename>/var/lib/pgsql/10/data</filename></entry>
+     </row>
+
      <row>
       <entry>repmgrd service command:</entry>
-      <entry><literal>service repmgr10</literal></entry>
+      <entry><command>systemctl [start|stop|restart|reload] repmgr10</command></entry>
      </row>
 
      <row>
@@ -82,7 +158,7 @@
 
      <row>
       <entry>repmgrd log file location:</entry>
-      <entry>(not specified)</entry>
+      <entry>(not specified by package; set in <filename>repmgr.conf</filename>)</entry>
      </row>
 
     </tbody>
@@ -94,29 +170,20 @@
 
    <tgroup cols="2">
     <tbody>
-     <row>
-      <entry>Repository URL:</entry>
-      <entry><ulink url="https://yum.postgresql.org/repopackages.php">https://yum.postgresql.org/repopackages.php</ulink></entry>
-     </row>
-
-     <row>
-      <entry>Repository documentation:</entry>
-      <entry><ulink url="https://yum.postgresql.org/">https://yum.postgresql.org/</ulink></entry>
-     </row>
 
      <row>
       <entry>Package name example:</entry>
-      <entry><filename>repmgr96-4.0.0-1.rhel6.x86_64</filename></entry>
+      <entry><filename>repmgr96-4.0.4-1.rhel6.x86_64</filename></entry>
      </row>
 
      <row>
       <entry>Metapackage:</entry>
-      <entry>NO</entry>
+      <entry>(none)</entry>
      </row>
 
      <row>
       <entry>Installation command:</entry>
-      <entry><literal>yum install -y repmgr96</literal></entry>
+      <entry><literal>yum install repmgr96</literal></entry>
      </row>
 
      <row>
@@ -125,7 +192,7 @@
      </row>
 
      <row>
-      <entry>In default path:</entry>
+      <entry>repmgr in default path:</entry>
       <entry>NO</entry>
      </row>
 
@@ -134,9 +201,14 @@
       <entry><filename>/etc/repmgr/9.6/repmgr.conf</filename></entry>
      </row>
 
+     <row>
+      <entry>Data directory:</entry>
+      <entry><filename>/var/lib/pgsql/9.6/data</filename></entry>
+     </row>
+
      <row>
       <entry>repmgrd service command:</entry>
-      <entry>service repmgr-9.6</entry>
+      <entry><literal>service [start|stop|restart|reload] repmgr-9.6</literal></entry>
      </row>
 
      <row>
@@ -153,6 +225,143 @@
    </tgroup>
   </table>
 
-
+    </sect2>
  </sect1>
+
+
+
+
+  <sect1 id="packages-debian-ubuntu" xreflabel="Debian/Ubuntu packages">
+    <title>Debian/Ubuntu Packages</title>
+    <indexterm>
+      <primary>packages</primary>
+      <secondary>Debian/Ubuntu packages</secondary>
+    </indexterm>
+    <para>
+      &repmgr; <literal>.deb</literal> packages are provided via the
+      PostgreSQL Community APT repository, and are available for each community-supported
+      PostgreSQL version, currently supported Debian releases, and currently supported
+      Ubuntu LTS releases.
+    </para>
+
+    <sect2 id="packages-apt-repository">
+      <title>APT repository</title>
+
+      <para>
+        &repmgr; packages are available from the  PostgreSQL Community APT repository,
+        which is updated immediately after each &repmgr; release.
+      </para>
+
+
+      <table id="apt-repository">
+        <title>PostgreSQL Community APT repository (PGDG)</title>
+        <tgroup cols="2">
+          <tbody>
+            <row>
+              <entry>Repository URL:</entry>
+              <entry><ulink url="http://apt.postgresql.org/">http://apt.postgresql.org/</ulink></entry>
+            </row>
+            <row>
+              <entry>Repository documentation:</entry>
+              <entry><ulink url="https://wiki.postgresql.org/wiki/Apt)">https://wiki.postgresql.org/wiki/Apt)</ulink></entry>
+            </row>
+          </tbody>
+        </tgroup>
+      </table>
+    </sect2>
+
+   <sect2 id="packages-debian-details">
+      <title>Debian/Ubuntu package details</title>
+
+      <para>
+        The table below lists relevant information, paths, commands etc. for the &repmgr; packages on
+        Debian 9.x ("Stretch"). Substitute the appropriate PostgreSQL major
+        version number for your installation.
+      </para>
+      <para>
+        See also <xref linkend="repmgrd-configuration-debian-ubuntu"> for some specifics related
+        to configuring the <application>repmgrd</application> daemon.
+      </para>
+
+      <table id="debian-9-packages">
+        <title>Debian 9.x packages</title>
+
+        <tgroup cols="2">
+          <tbody>
+
+            <row>
+              <entry>Package name example:</entry>
+              <entry><filename>postgresql-10-repmgr</filename></entry>
+            </row>
+
+            <row>
+              <entry>Metapackage:</entry>
+              <entry><filename>repmgr-common</filename></entry>
+            </row>
+
+            <row>
+              <entry>Installation command:</entry>
+              <entry><literal>apt-get install postgresql-10-repmgr</literal></entry>
+            </row>
+
+            <row>
+              <entry>Binary location:</entry>
+              <entry><filename>/usr/lib/postgresql/10/bin</filename></entry>
+            </row>
+
+            <row>
+              <entry>repmgr in default path:</entry>
+              <entry>Yes (via wrapper script <filename>/usr/bin/repmgr</filename>)</entry>
+            </row>
+
+            <row>
+              <entry>Configuration file location:</entry>
+              <entry>(not set by package)</entry>
+            </row>
+
+            <row>
+              <entry>Data directory:</entry>
+              <entry><filename>/var/lib/postgresql/10/main</filename></entry>
+            </row>
+
+            <row>
+              <entry>PostgreSQL service command:</entry>
+              <entry><command>systemctl [start|stop|restart|reload] postgresql@10-main</command></entry>
+
+            </row>
+
+            <row>
+              <entry>repmgrd service command:</entry>
+              <entry><command>systemctl [start|stop|restart|reload] repmgrd</command></entry>
+            </row>
+
+            <row>
+              <entry>repmgrd service file location:</entry>
+              <entry><filename>/etc/init.d/repmgrd</filename> (defaults in: <filename>/etc/defaults/repmgrd</filename>)</entry>
+            </row>
+
+            <row>
+              <entry>repmgrd log file location:</entry>
+              <entry>(not specified by package; set in <filename>repmgr.conf</filename>)</entry>
+            </row>
+
+          </tbody>
+        </tgroup>
+      </table>
+      <note>
+        <para>
+          Instead of using the <application>systemd</application> service command directly,
+          it's recommended to execute <command>pg_ctlcluster</command> (as <literal>root</literal>,
+          either directly or via <command>sudo</command>), e.g.:
+          <programlisting>
+            <command>pg_ctlcluster 10 main [start|stop|restart|reload]</command></programlisting>
+        </para>
+        <para>
+          For pre-<application>systemd</application> systems, <command>pg_ctlcluster</command>
+          can be executed directly by the <literal>postgres</literal> user.
+        </para>
+      </note>
+   </sect2>
+
+  </sect1>
 </appendix>

doc/appendix-release-notes.sgml

@@ -15,9 +15,393 @@
     See also: <xref linkend="upgrading-repmgr">
   </para>
 
+  <sect1 id="release-4.0.6">
+    <title>Release 4.0.6</title>
+    <para><emphasis>June ??, 2018</emphasis></para>
+    <para>
+	  &repmgr; 4.0.6 contains a number of bug fixes and usability enhancements.
+    </para>
+	<para>
+	  We recommend upgrading to this version as soon as possible.
+	  This release can be installed as a simple package upgrade from repmgr 4.0 ~ 4.0.5;
+      <application>repmgrd</application> (if running) should be restarted. See <xref linkend="upgrading-repmgr">
+      for more details.
+	</para>
+
+    <sect2>
+      <title>Usability enhancements</title>
+
+      <para>
+        <itemizedlist>
+          <listitem>
+            <para>
+              <command><link linkend="repmgr-cluster-crosscheck">repmgr cluster crosscheck</link></command> and
+              <command><link linkend="repmgr-cluster-matrix">repmgr cluster matrix</link></command>:
+              return non-zero exit code if node connection issues detected (GitHub #447)
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+               <command><link linkend="repmgr-standby-clone">repmgr standby clone</link></command>:
+			   Improve handling of external configuration file copying,  including consideration in
+			   <option>--dry-run</option> check
+			   (GitHub #443)
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              When using <option>--dry-run</option>, force log level to <literal>INFO</literal>
+			  to ensure output will always be displayed
+			  (GitHub #441)
+           </para>
+          </listitem>
+
+        </itemizedlist>
+      </para>
+    </sect2>
+
+    <sect2>
+      <title>Bug fixes</title>
+      <para>
+
+        <itemizedlist>
+
+          <listitem>
+            <para>
+              <command><link linkend="repmgr-witness-register">repmgr witness register</link></command>:
+              prevent registration of a witness server with the same name as an existing node.
+           </para>
+          </listitem>
+
+
+          <listitem>
+            <para>
+               <command><link linkend="repmgr-standby-follow">repmgr standby follow</link></command>:
+			   check node has actually connected to new primary before reporting success
+			   (GitHub #444)
+           </para>
+          </listitem>
+
+
+          <listitem>
+            <para>
+               <command><link linkend="repmgr-standby-clone">repmgr standby clone</link></command>:
+			   Don't require presence of <varname>user</varname> parameter in conninfo string
+			   (GitHub #437)
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+               <command><link linkend="repmgr-standby-clone">repmgr standby clone</link></command>:
+			   Improve documentation of <option>--recovery-conf-only</option> mode
+			   (GitHub #438)
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+               <command><link linkend="repmgr-node-rejoin">repmgr node rejoin</link></command>:
+			   Fix bug when parsing <option>--config-files</option> parameter
+			   (GitHub #442)
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              <application>repmgrd</application>: ensure local node is counted as quorum member
+			  (GitHub #439)
+           </para>
+          </listitem>
+
+        </itemizedlist>
+      </para>
+    </sect2>
+
+  </sect1>
+
+  <sect1 id="release-4.0.5">
+    <title>Release 4.0.5</title>
+    <para><emphasis>Wed May 2, 2018</emphasis></para>
+    <para>
+      &repmgr; 4.0.5 contains a number of usability enhancements related to
+      <application>pg_rewind</application> usage, <filename>recovery.conf</filename>
+      generation and (in <application>repmgrd</application>) handling of various
+      corner-case situations, as well as a number of bug fixes.
+    </para>
+
+    <sect2>
+      <title>Usability enhancements</title>
+
+      <para>
+        <itemizedlist>
+          <listitem>
+            <para>
+              Various documentation improvements, with particular emphasis on
+              the importance of setting appropriate <link linkend="configuration-service-commands">service commands</link>
+              instead of relying on <application>pg_ctl</application>.
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              Poll demoted primary after restart as a standby during a switchover operation (GitHub #408).
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              Add configuration parameter <option>config_directory</option> (GitHub #424).
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              Add sanity check if <option>--upstream-node-id</option> not supplied when executing
+              <xref linkend="repmgr-standby-register"> (GitHub #395).
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              Enable <link linkend="repmgr-node-rejoin-pg-rewind">pg_rewind</link> to be used with
+              PostgreSQL 9.3/9.4 (GitHub #413).
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              When generating replication connection strings, set <literal>dbname=replication</literal>
+              if appropriate (GitHub #421).
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              Enable provision of <option>archive_cleanup_command</option> in <filename>recovery.conf</filename>
+              (GitHub #416).
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              Actively check for node to <link linkend="repmgr-node-rejoin">rejoin</link> cluster (GitHub #415).
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              <application>repmgrd</application>: set <literal>connect_timeout=2</literal> (if not explicitly set)
+              when pinging a server.
+           </para>
+          </listitem>
+
+        </itemizedlist>
+      </para>
+
+    </sect2>
+
+   <sect2>
+      <title>Bug fixes</title>
+      <para>
+
+        <itemizedlist>
+
+          <listitem>
+            <para>
+              Fix display of conninfo parsing error messages.
+           </para>
+          </listitem>
+
+
+          <listitem>
+            <para>
+              Fix minimum accepted value for <varname>degraded_monitoring_timeout</varname> (GitHub #411).
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              Fix superuser password handling (GitHub #400)
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              Fix parsing of <varname>archive_ready_critical</varname> configuration file parameter (GitHub #426).
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              Fix <command><link linkend="repmgr-cluster-crosscheck">repmgr cluster crosscheck</link></command>
+              output (GitHub #389)
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+               Fix memory leaks in witness code (GitHub #402).
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              <application>repmgrd</application>: handle <command>pg_ctl promote</command> timeout (GitHub #425).
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              <application>repmgrd</application>: handle failover situation with only two nodes in the primary
+          location, and at least one node in another location (GitHub #407).
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+               <application>repmgrd</application>: prevent standby connection handle from going stale.
+           </para>
+          </listitem>
+
+
+
+        </itemizedlist>
+      </para>
+   </sect2>
+
+  </sect1>
+
+
+  <sect1 id="release-4.0.4">
+    <title>Release 4.0.4</title>
+    <para><emphasis>Fri Mar 9, 2018</emphasis></para>
+
+    <para>
+      &repmgr; 4.0.4 contains some bug fixes and and a number of
+      usability enhancements related to logging/diagnostics,
+      event notifications and pre-action checks.
+    </para>
+    <para>
+      This release can be installed as a simple package upgrade from repmgr 4.0 ~ 4.0.3;
+      <application>repmgrd</application> (if running) should be restarted. See <xref linkend="upgrading-repmgr">
+      for more details.
+    </para>
+
+    <note>
+      <para>
+        It is not possible to perform a switchover where the demotion candidate is
+        running &repmgr; 4.0.2 or lower; all nodes should be upgraded to the latest version (4.0.4).
+        This is due to additional checks introduced in 4.0.3 which require the presence of
+        4.0.3 or later versions on all nodes.
+      </para>
+    </note>
+
+    <sect2>
+      <title>Usability enhancements</title>
+
+      <para>
+        <itemizedlist>
+
+          <listitem>
+            <para>
+              add <command><link linkend="repmgr-standby-clone">repmgr standby clone --recovery-conf-only</link></command>
+              option to enable integration of a standby cloned from another source into a &repmgr; cluster (GitHub #382)
+            </para>
+          </listitem>
+
+         <listitem>
+            <para>
+              remove restriction on using replication slots when cloning from a Barman server (GitHub #379)
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              make <command><link linkend="repmgr-standby-promote">repmgr standby promote</link></command>
+              timeout values configurable (GitHub #387)
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              add missing options to main <literal>--help</literal> output (GitHub #391, #392)
+            </para>
+          </listitem>
+
+        </itemizedlist>
+      </para>
+
+    </sect2>
+
+    <sect2>
+      <title>Bug fixes</title>
+      <para>
+
+        <itemizedlist>
+
+          <listitem>
+            <para>
+              ensure <command><link linkend="repmgr-node-rejoin">repmgr node rejoin</link></command>
+              honours the <option>--dry-run</option> option (GitHub #383)
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              improve replication slot warnings generated by
+              <command><link linkend="repmgr-node-status">repmgr node status</link></command>
+              (GitHub #385)
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              fix --superuser handling when cloning a standby (GitHub #380)
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              <application>repmgrd</application>: improve detection of status change from primary to
+              standby
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              <application>repmgrd</application>:  improve reconnection to the local node after a
+              failover (previously a connection error due to the node starting up was being
+              interpreted as the node being unavailable)
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              <application>repmgrd</application>: when running on a witness server, correctly connect
+              to new primary after a failover
+           </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              <application>repmgrd</application>: add <link linkend="event-notifications">event notification</link>
+              <literal>repmgrd_shutdown</literal> (GitHub #393)
+           </para>
+          </listitem>
+
+        </itemizedlist>
+
+      </para>
+    </sect2>
+
+  </sect1>
+
   <sect1 id="release-4.0.3">
     <title>Release 4.0.3</title>
-    <para><emphasis>??? Feb ??, 2018</emphasis></para>
+    <para><emphasis>Thu Feb 15, 2018</emphasis></para>
 
     <para>
       &repmgr; 4.0.3 contains some bug fixes and and a number of
@@ -25,6 +409,18 @@
       event notifications and pre-action checks.
     </para>
 
+    <para>
+      This release can be installed as a simple package upgrade from repmgr 4.0 ~ 4.0.2;
+      repmgrd (if running) should be restarted.
+    </para>
+    <note>
+      <para>
+        It is not possible to perform a switchover where the demotion candidate is
+        running &repmgr; 4.0.2 or lower; all nodes should be upgraded to 4.0.3. This is due
+        to additional checks introduced in 4.0.3 which require the presence of
+        4.0.3 or later versions on all nodes.
+      </para>
+    </note>
     <sect2>
       <title>Usability enhancements</title>
 
@@ -65,16 +461,24 @@
           <listitem>
             <para>
               add --dry-run mode to <command><link linkend="repmgr-standby-switchover">repmgr standby follow</link></command>
-              (GitHub #369)
+              (GitHub #368)
             </para>
           </listitem>
 
           <listitem>
             <para>
-              add <literal>standby_register_sync</literal> event notification, which is fired when
+              provide information about the primary node for
+              <command><link linkend="repmgr-standby-register">repmgr standby register</link></command> and
+              <command><link linkend="repmgr-standby-follow">repmgr standby follow</link></command> event notifications (GitHub #375)
+            </para>
+          </listitem>
+
+          <listitem>
+            <para>
+              add <literal>standby_register_sync</literal> <link linkend="event-notifications">event notification</link>, which is fired when
               <command><link linkend="repmgr-standby-register">repmgr standby register</link></command>
               is run with the <option>--wait-sync</option> option and the new or updated standby node
-              record has synchronised to the standy (GitHub #374)
+              record has synchronised to the standby (GitHub #374)
             </para>
           </listitem>
 

doc/cloning-standbys.sgml

@@ -51,7 +51,7 @@
    </itemizedlist>
    </para>
 
-  <sect2 id="cloning-from-barman-prerequisites" xreflabel="Prerequisites for cloning from Barman">
+  <sect2 id="cloning-from-barman-prerequisites">
    <title>Prerequisites for cloning from Barman</title>
    <para>
     In order to enable Barman support for <command>repmgr standby clone</command>, following
@@ -356,7 +356,7 @@
      By default, <command>pg_basebackup</command> performs a checkpoint before beginning the backup
      process. However, a normal checkpoint may take some time to complete;
      a fast checkpoint can be forced with the <literal>-c/--fast-checkpoint</literal> option.
-     However this may impact performance of the server being cloned from (typically the primary)
+     Note that this may impact performance of the server being cloned from (typically the primary)
      so should be used with care.
     </para>
     <tip>
@@ -384,11 +384,16 @@
 
    <sect2 id="cloning-advanced-managing-passwords" xreflabel="Managing passwords">
     <title>Managing passwords</title>
+    <indexterm>
+      <primary>cloning</primary>
+      <secondary>using passwords</secondary>
+    </indexterm>
+
     <para>
      If replication connections to a standby's upstream server are password-protected,
-     the standby must be able to provide the password so it can begin streaming
+     the standby must be able to provide the password so it can begin streaming replication.
-     replication.
     </para>
+
     <para>
      The recommended way to do this is to store the password in the <literal>postgres</literal> system
      user's <filename>~/.pgpass</filename> file. It's also possible to store the password in the
@@ -396,6 +401,17 @@
      security reasons. For more details see the
      <ulink url="https://www.postgresql.org/docs/current/static/libpq-pgpass.html">PostgreSQL password file documentation</ulink>.
     </para>
+
+    <note>
+      <para>
+        If using a <filename>pgpass</filename> file, an entry for the replication user (by default the
+        user who connects to the <literal>repmgr</literal> database) <emphasis>must</emphasis>
+        be provided, with database name set to <literal>replication</literal>, e.g.:
+        <programlisting>
+          node1:5432:replication:repmgr:12345</programlisting>
+      </para>
+    </note>
+
     <para>
      If, for whatever reason, you wish to include the password in <filename>recovery.conf</filename>,
      set <varname>use_primary_conninfo_password</varname> to <literal>true</literal> in
@@ -407,8 +423,7 @@
     </para>
     <para>
      It is of course also possible to include the password value in the <varname>conninfo</varname>
-     string for each node, but this is obviously a security risk and should be
+     string for each node, but this is obviously a security risk and should be avoided.
-     avoided.
     </para>
     <para>
       From PostgreSQL 9.6, <application>libpq</application> supports the <varname>passfile</varname>

doc/configuration-file-settings.sgml

@@ -1,10 +1,10 @@
 <sect1 id="configuration-file-settings" xreflabel="configuration file settings">
   <indexterm>
     <primary>repmgr.conf</primary>
-    <secondary>settings</secondary>
+    <secondary>basic settings</secondary>
   </indexterm>
 
- <title>Configuration file settings</title>
+ <title>Basic configuration file settings</title>
  <para>
    Each <filename>repmgr.conf</filename> file must contain the following parameters:
  </para>
@@ -92,7 +92,10 @@
 
   <para>
     For a full list of annotated configuration items, see the file
-    <ulink url="https://raw.githubusercontent.com/2ndQuadrant/repmgr/master/repmgr.conf.sample">repmgr.conf.sample</>.
+    <ulink url="https://raw.githubusercontent.com/2ndQuadrant/repmgr/master/repmgr.conf.sample">repmgr.conf.sample</ulink>.
+  </para>
+  <para>
+    For <application>repmgrd</application>-specific settings, see <xref linkend="repmgrd-configuration">.
   </para>
 
   <note>

doc/configuration-service-commands.sgml

@@ -0,0 +1,115 @@
+<sect1 id="configuration-service-commands" xreflabel="service command settings">
+  <indexterm>
+    <primary>repmgr.conf</primary>
+    <secondary>service command settings</secondary>
+  </indexterm>
+  <indexterm>
+    <primary>service command settings</primary>
+    <secondary>configuration in repmgr.conf</secondary>
+  </indexterm>
+  <title>Service command settings</title>
+
+  <para>
+    In some circumstances, &repmgr; (and <application>repmgrd</application>) need to
+    be able to stop, start or restart PostgreSQL. &repmgr; commands which need to do this
+    include <link linkend="repmgr-standby-follow"><command>repmgr standby follow</command></link>,
+    <link linkend="repmgr-standby-switchover"><command>repmgr standby switchover</command></link> and
+    <link linkend="repmgr-node-rejoin"><command>repmgr node rejoin</command></link>.
+  </para>
+  <para>
+    By default, &repmgr; will use PostgreSQL's <command>pg_ctl</command> to control the PostgreSQL
+    server. However this can lead to various problems, particularly when PostgreSQL has been
+    installed from packages, and expecially so if <application>systemd</application> is in use.
+  </para>
+
+
+  <note>
+    <para>
+      If using <application>systemd</application>, ensure you have <varname>RemoteIPC</varname> set to <literal>off</literal>.
+      See the <ulink url="https://wiki.postgresql.org/wiki/Systemd">systemd</ulink>
+      entry in the <ulink url="https://wiki.postgresql.org/wiki/Main_Page">PostgreSQL wiki</ulink> for details.
+    </para>
+  </note>
+
+
+  <para>
+    With this in mind, we recommend to <emphasis>always</emphasis> configure &repmgr; to use the
+    available system service commands.
+  </para>
+
+  <para>
+    To do this, specify the appropriate command for each action
+    in <filename>repmgr.conf</filename> using the following configuration
+    parameters:
+    <programlisting>
+    service_start_command
+    service_stop_command
+    service_restart_command
+    service_reload_command</programlisting>
+  </para>
+
+  <note>
+    <para>
+      It's also possible to specify a <varname>service_promote_command</varname>;
+      this overrides any value contained in the setting <varname>promote_command</varname>.
+      This is intended for systems which provide a package-level promote command,
+      such as Debian's <application>pg_ctlcluster</application>.
+    </para>
+  </note>
+
+  <para>
+    To confirm which command &repmgr; will execute for each action, use
+    <command>repmgr node service --list --action=...</command>, e.g.:
+    <programlisting>
+      repmgr -f /etc/repmgr.conf node service --list --action=stop
+      repmgr -f /etc/repmgr.conf node service --list --action=start
+      repmgr -f /etc/repmgr.conf node service --list --action=restart
+      repmgr -f /etc/repmgr.conf node service --list --action=reload</programlisting>
+  </para>
+
+  <para>
+     These commands will be executed by the system user which &repmgr; runs as (usually <literal>postgres</literal>)
+     and will probably require passwordless sudo access to be able to execute the command.
+  </para>
+  <para>
+    For example, using <application>systemd</application> on CentOS 7, the service commands can be
+    set as follows:
+    <programlisting>
+      service_start_command   = 'sudo systemctl start postgresql-9.6'
+      service_stop_command    = 'sudo systemctl stop postgresql-9.6'
+      service_restart_command = 'sudo systemctl restart postgresql-9.6'
+      service_reload_command  = 'sudo systemctl reload postgresql-9.6'</programlisting>
+    and <filename>/etc/sudoers</filename> should be set as follows:
+    <programlisting>
+      Defaults:postgres !requiretty
+      postgres ALL = NOPASSWD: /usr/bin/systemctl stop postgresql-9.6, \
+        /usr/bin/systemctl start postgresql-9.6, \
+        /usr/bin/systemctl restart postgresql-9.6 \
+        /usr/bin/systemctl reload postgresql-9.6</programlisting>
+  </para>
+
+  <important>
+    <indexterm>
+      <primary>pg_ctlcluster</primary>
+      <secondary>service command settings</secondary>
+    </indexterm>
+    <para>
+      Debian/Ubuntu users: instead of calling <command>sudo systemctl</command> directly, use
+      <command>sudo pg_ctlcluster</command>, e.g.:
+    <programlisting>
+      service_start_command   = 'sudo pg_ctlcluster 9.6 main start'
+      service_stop_command    = 'sudo pg_ctlcluster 9.6 main stop'
+      service_restart_command = 'sudo pg_ctlcluster 9.6 main restart'
+      service_reload_command  = 'sudo pg_ctlcluster 9.6 main reload'</programlisting>
+      and set <filename>/etc/sudoers</filename> accordingly.
+    </para>
+    <para>
+      While <command>pg_ctlcluster</command> will work when executed as user <literal>postgres</literal>,
+      it's strongly recommended to use <command>sudo pg_ctlcluster</command> on <application>systemd</application>
+      systems, to ensure <application>systemd</application> has a correct picture of
+      the PostgreSQL application state.
+    </para>
+
+  </important>
+
+</sect1>

doc/configuration.sgml

@@ -3,6 +3,7 @@
 
   &configuration-file;
   &configuration-file-settings;
+  &configuration-service-commands;
 
   <sect1 id="configuration-permissions" xreflabel="User permissions">
     <indexterm>

doc/event-notifications.sgml

@@ -205,6 +205,9 @@
    <listitem>
     <simpara><literal>repmgrd_failover_follow</literal></simpara>
    </listitem>
+   <listitem>
+     <simpara><literal>repmgrd_failover_aborted</literal></simpara>
+   </listitem>
    <listitem>
     <simpara><literal>repmgrd_upstream_disconnect</literal></simpara>
    </listitem>

doc/filelist.sgml

@@ -39,6 +39,7 @@
 <!ENTITY configuration      SYSTEM "configuration.sgml">
 <!ENTITY configuration-file      SYSTEM "configuration-file.sgml">
 <!ENTITY configuration-file-settings      SYSTEM "configuration-file-settings.sgml">
+<!ENTITY configuration-service-commands   SYSTEM "configuration-service-commands.sgml">
 <!ENTITY cloning-standbys  SYSTEM "cloning-standbys.sgml">
 <!ENTITY promoting-standby  SYSTEM "promoting-standby.sgml">
 <!ENTITY follow-new-primary  SYSTEM "follow-new-primary.sgml">

doc/install-packages.sgml

@@ -5,83 +5,107 @@
   system.
  </para>
 
- <sect2 id="installation-packages-redhat" xreflabel="Installing from packages on RHEL, Fedora and CentOS">
+ <sect2 id="installation-packages-redhat" xreflabel="Installing from packages on RHEL, CentOS and Fedora">
 
   <indexterm>
    <primary>installation</primary>
-   <secondary>on Redhat/CentOS/Fedora etc.</secondary>
+   <secondary>on Red Hat/CentOS/Fedora etc.</secondary>
   </indexterm>
 
-  <title>RedHat/Fedora/CentOS</title>
+  <title>RedHat/CentOS/Fedora</title>
   <para>
-   RPM packages for &repmgr; are available via Yum through
+	&repmgr; RPM packages for RedHat/CentOS variants and Fedora are available from the
+	<ulink url="https://2ndquadrant.com">2ndQuadrant</ulink>
+	<ulink url="https://rpm.2ndquadrant.com/">public RPM repository</ulink>; see following
+	section for details.
+  </para>
+  <para>
+   RPM packages for &repmgr; are also available via Yum through
    the PostgreSQL Global Development Group RPM repository
    (<ulink url="https://yum.postgresql.org/">http://yum.postgresql.org/</ulink>).
    Follow the instructions for your distribution (RedHat, CentOS,
-   Fedora, etc.) and architecture as detailed there.
+   Fedora, etc.) and architecture as detailed there. Note that it can take some days
+   for new &repmgr; packages to become available via the this repository.
   </para>
+  <note>
+    <para>
+      &repmgr; packages are designed to be compatible with the community-provided PostgreSQL packages.
+      They may not work with vendor-specific packages such as those provided by RedHat for RHEL
+      customers, as the filesystem layout may be different to the community RPMs.
+      Please contact your support vendor for assistance.
+    </para>
+  </note>
+
   <para>
-   <ulink url="https://2ndquadrant.com">2ndQuadrant</ulink> also provides its
+    For more information on the package contents, including details of installation
-   own RPM packages which are made available
+    paths and relevant <link linkend="configuration-service-commands">service commands</link>,
-   at the same time as each &repmgr; release, as it can take some days for
+    see the appendix section <xref linkend="packages-centos">.
-   them to become available via the main PGDG repository. See following section for details:
   </para>
 
 
   <sect3 id="installation-packages-redhat-2ndq">
-    <title>2ndQuadrant repmgr yum repository</title>
+    <title>2ndQuadrant public RPM yum repository</title>
+
+	<note>
+	  <para>
+		<ulink url="https://2ndquadrant.com">2ndQuadrant</ulink> previously provided a dedicated
+        &repmgr; repository at
+        <ulink url="http://packages.2ndquadrant.com/repmgr/">http://packages.2ndquadrant.com/repmgr/</ulink>.
+		This repository will be deprecated in a future release as it is now replaced by
+		the <ulink url="https://rpm.2ndquadrant.com/">public RPM repository</ulink>
+		documented below.
+	  </para>
+	</note>
+
     <para>
-      Beginning with <ulink url="http://repmgr.org/release-notes-3.1.3.html">repmgr 3.1.3</ulink>,
+      Beginning with <ulink url="https://repmgr.org/docs/4.0/release-4.0.5.html">repmgr 4.0.5</ulink>,
       <ulink url="https://2ndquadrant.com/">2ndQuadrant</ulink> provides a dedicated <literal>yum</literal>
-      repository for &repmgr; releases. This repository complements the main
+	  <ulink url="https://rpm.2ndquadrant.com/">public RPM repository</ulink> for 2ndQuadrant software,
-      <ulink url="https://yum.postgresql.org/repopackages.php">PGDG community repository</ulink>,
+	  including &repmgr;. We recommend using this for all future &repmgr; releases.
-      but enables repmgr users to access the latest &repmgr; packages before they are
+	</para>
-      available via the PGDG repository, which can take several days to be updated following
+	<para>
-      a fresh  &repmgr; release.
+	  General instructions for using this repository can be found on its
-    </para>
+	  <ulink url="https://rpm.2ndquadrant.com/">homepage</ulink>. Specific instructions
+	  for installing &repmgr; follow below.
+	</para>
     <para>
       <emphasis>Installation</emphasis>
 
       <itemizedlist>
-        <listitem>
+		<listitem>
-          <para>
+		  <para>
-            Import the repository public key (optional but recommended):
+			Locate the repository RPM for your PostgreSQL version from the list at:
-            <programlisting>
+			<ulink url="https://rpm.2ndquadrant.com/">https://rpm.2ndquadrant.com/</ulink>
-              rpm --import http://packages.2ndquadrant.com/repmgr/RPM-GPG-KEY-repmgr</programlisting>
+		  </para>
-          </para>
+		</listitem>
-        </listitem>
 
         <listitem>
           <para>
-            Install the repository RPM for your distribution (this enables the 2ndQuadrant
+            Install the repository RPM for your distribution and PostgreSQL version
-            repository as a source of repmgr packages):
+			(this enables the 2ndQuadrant repository as a source of &repmgr; packages).
-            <itemizedlist>
+		  </para>
-              <listitem>
+		  <para>
-                <simpara>
+			For example, for PostgreSQL 10 on CentOS, execute:
-                  <emphasis>Fedora:</emphasis>
+			<programlisting>
-                  <ulink url="http://packages.2ndquadrant.com/repmgr/yum-repo-rpms/repmgr-fedora-1.0-1.noarch.rpm">http://packages.2ndquadrant.com/repmgr/yum-repo-rpms/repmgr-fedora-1.0-1.noarch.rpm</ulink>
+sudo yum install https://rpm.2ndquadrant.com/site/content/2ndquadrant-repo-10-1-1.el7.noarch.rpm
-                </simpara>
+			</programlisting>
-              </listitem>
+		  </para>
-              <listitem>
+		  <para>
-                <simpara>
+			Verify that the repository is installed with:
-                  <emphasis>RHEL, CentOS etc:</emphasis>
+			<programlisting>
-                  <ulink url="http://packages.2ndquadrant.com/repmgr/yum-repo-rpms/repmgr-rhel-1.0-1.noarch.rpm">http://packages.2ndquadrant.com/repmgr/yum-repo-rpms/repmgr-rhel-1.0-1.noarch.rpm</ulink>
+sudo yum repolist</programlisting>
-                </simpara>
+			The output should contain two entries like this:
-              </listitem>
+			<programlisting>
-            </itemizedlist>
+2ndquadrant-repo-10/7/x86_64         2ndQuadrant packages for PG10 for rhel 7 - x86_64           1
-          </para>
+2ndquadrant-repo-10-debug/7/x86_64   2ndQuadrant packages for PG10 for rhel 7 - x86_64 - Debug   1</programlisting>
-          <para>
+		  </para>
-            e.g.:
+		</listitem>
-            <programlisting>
-              $ yum install http://packages.2ndquadrant.com/repmgr/yum-repo-rpms/repmgr-rhel-1.0-1.noarch.rpm</programlisting>
-          </para>
-        </listitem>
 
         <listitem>
           <para>
-            Install the repmgr version appropriate for your PostgreSQL version (e.g. <literal>repmgr96</literal>), e.g.:
+            Install the &repmgr version appropriate for your PostgreSQL version (e.g. <literal>repmgr10</literal>):
             <programlisting>
-              $ yum install repmgr96</programlisting>
+$ yum install repmgr10</programlisting>
           </para>
         </listitem>
       </itemizedlist>
@@ -91,13 +115,13 @@
       <emphasis>Compatibility with PGDG Repositories</emphasis>
     </para>
     <para>
-        The 2ndQuadrant &repmgr; yum repository uses exactly the same package definitions as the
+      The 2ndQuadrant &repmgr; yum repository packages use the same definitions and file system layout as the
-        main PGDG repository and is effectively a selective mirror for &repmgr; packages only.
+      main PGDG repository.
     </para>
     <para>
-        Normally yum should prioritize the repository with the most recent &repmgr; version.
+      Normally <application>yum</application> will prioritize the repository with the most recent &repmgr; version.
-        Once the PGDG repository has been updated, it doesn't matter which repository
+      Once the PGDG repository has been updated, it doesn't matter which repository
-        the packages are installed from.
+      the packages are installed from.
     </para>
     <para>
       To ensure the 2ndQuadrant repository is always prioritised, install <literal>yum-plugin-priorities</literal>
@@ -111,30 +135,23 @@
       To install a specific package version, execute <command>yum --showduplicates list</command>
       for the package in question:
       <programlisting>
-        [root@localhost ~]# yum --showduplicates list repmgr96
+        [root@localhost ~]# yum --showduplicates list repmgr10
         Loaded plugins: fastestmirror
         Loading mirror speeds from cached hostfile
          * base: ftp.iij.ad.jp
          * extras: ftp.iij.ad.jp
          * updates: ftp.iij.ad.jp
         Available Packages
-        repmgr96.x86_64               3.2-1.el6                    2ndquadrant-repmgr
+		repmgr10.x86_64                       4.0.3-1.rhel7                        pgdg10
-        repmgr96.x86_64               3.2.1-1.el6                  2ndquadrant-repmgr
+		repmgr10.x86_64                       4.0.4-1.rhel7                        pgdg10
-        repmgr96.x86_64               3.3-1.el6                    2ndquadrant-repmgr
+		repmgr10.x86_64                       4.0.5-1.el7                          2ndquadrant-repo-10</programlisting>
-        repmgr96.x86_64               3.3.1-1.el6                  2ndquadrant-repmgr
-        repmgr96.x86_64               3.3.2-1.el6                  2ndquadrant-repmgr
-        repmgr96.x86_64               3.3.2-1.rhel6                pgdg96
-        repmgr96.x86_64               4.0.0-1.el6                  2ndquadrant-repmgr
-        repmgr96.x86_64               4.0.0-1.rhel6                pgdg96</programlisting>
       then append the appropriate version number to the package name with a hyphen, e.g.:
       <programlisting>
-        [root@localhost ~]# yum install repmgr96-3.3.2-1.el6</programlisting>
+        [root@localhost ~]# yum install repmgr10-4.0.3-1.rhel7</programlisting>
     </para>
   </sect3>
  </sect2>
 
-
-
  <sect2 id="installation-packages-debian" xreflabel="Installing from packages on Debian or Ubuntu">
 
   <indexterm>
@@ -148,6 +165,85 @@
   Instructions can be found in the APT section of the PostgreSQL Wiki
   (<ulink url="https://wiki.postgresql.org/wiki/Apt">https://wiki.postgresql.org/wiki/Apt</ulink>).
   </para>
+  <para>
+    For more information on the package contents, including details of installation
+    paths and relevant <link linkend="configuration-service-commands">service commands</link>,
+    see the appendix section <xref linkend="packages-debian-ubuntu">.
+  </para>
+
+  <sect3 id="installation-packages-debian-ubuntu-2ndq">
+    <title>2ndQuadrant public apt repository for Debian/Ubuntu</title>
+
+    <para>
+      Beginning with <ulink url="https://repmgr.org/docs/4.0/release-4.0.5.html">repmgr 4.0.5</ulink>,
+      <ulink url="https://2ndquadrant.com/">2ndQuadrant</ulink> provides a
+	  <ulink url="https://apt.2ndquadrant.com/">public apt repository</ulink> for 2ndQuadrant software,
+	  including &repmgr;.
+	</para>
+	<para>
+	  General instructions for using this repository can be found on its
+	  <ulink url="https://apt.2ndquadrant.com/">homepage</ulink>. Specific instructions
+	  for installing &repmgr; follow below.
+	</para>
+
+    <para>
+      <emphasis>Installation</emphasis>
+
+      <itemizedlist>
+
+		<listitem>
+		  <para>
+			If not already present, install the  <application>apt-transport-https</application> package:
+			<programlisting>
+sudo apt-get install apt-transport-https</programlisting>
+		  </para>
+		</listitem>
+
+		<listitem>
+		  <para>
+			Create <filename>/etc/apt/sources.list.d/2ndquadrant.list</filename> as follows:
+			<programlisting>
+sudo sh -c 'echo "deb https://apt.2ndquadrant.com/ $(lsb_release -cs)-2ndquadrant main" > /etc/apt/sources.list.d/2ndquadrant.list'</programlisting>
+		  </para>
+		</listitem>
+
+		<listitem>
+		  <para>
+			Install the 2ndQuadrant <ulink url="https://apt.2ndquadrant.com/site/keys/9904CD4BD6BAF0C3.asc">repository key</ulink>:
+			<programlisting>
+sudo apt-get install curl ca-certificates
+curl https://apt.2ndquadrant.com/site/keys/9904CD4BD6BAF0C3.asc | sudo apt-key add -</programlisting>
+		  </para>
+		</listitem>
+
+		<listitem>
+		  <para>
+			Update the package list
+			<programlisting>
+ sudo apt-get update</programlisting>
+		  </para>
+		</listitem>
+
+		<listitem>
+		  <para>
+            Install the &repmgr version appropriate for your PostgreSQL version (e.g. <literal>repmgr10</literal>):
+            <programlisting>
+$ apt-get install postgresql-10-repmgr</programlisting>
+		  </para>
+          <note>
+            <para>
+            For packages for PostgreSQL 9.6 and earlier, the package name includes
+            a period between major and minor version numbers, e.g.
+            <literal>postgresql-9.6-repmgr</literal>.
+            </para>
+          </note>
+		</listitem>
+
+	  </itemizedlist>
+
+	</para>
+
+  </sect3>
  </sect2>
 
 </sect1>

doc/install-source.sgml

@@ -80,7 +80,7 @@
    </para>
 
    <para>
-    There are also tags for each &repmgr; release, e.g. <filename>REL4_0_STABLE</filename>.
+    There are also tags for each &repmgr; release, e.g. <filename>4.0.5</filename>.
    </para>
 
    <para>

doc/overview.sgml

@@ -2,7 +2,8 @@
  <title>repmgr overview</title>
 
  <para>
-  This chapter provides a high-level overview of repmgr's components and functionality.
+  This chapter provides a high-level overview of &repmgr;'s components and
+  functionality.
  </para>
  <sect1 id="repmgr-concepts" xreflabel="Concepts">
 

doc/repmgr-cluster-crosscheck.sgml

@@ -38,5 +38,34 @@
       and therefore determine the state of outbound connections from that node.
     </para>
   </refsect1>
+
+  <refsect1>
+    <title>Exit codes</title>
+    <para>
+      Following exit codes can be emitted by <command>repmgr cluster crosscheck</command>:
+    </para>
+    <variablelist>
+
+      <varlistentry>
+        <term><option>SUCCESS (0)</option></term>
+        <listitem>
+          <para>
+            The check completed successfully and all nodes are reachable.
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>ERR_CLUSTER_CHECK (25)</option></term>
+        <listitem>
+          <para>
+            One or more nodes could not be reached.
+          </para>
+        </listitem>
+      </varlistentry>
+
+   </variablelist>
+  </refsect1>
+
 </refentry>
 

doc/repmgr-cluster-matrix.sgml

@@ -97,5 +97,35 @@
     useful result.
   </para>
   </refsect1>
+
+
+  <refsect1>
+    <title>Exit codes</title>
+    <para>
+      Following exit codes can be emitted by <command>repmgr cluster matrix</command>:
+    </para>
+    <variablelist>
+
+      <varlistentry>
+        <term><option>SUCCESS (0)</option></term>
+        <listitem>
+          <para>
+            The check completed successfully and all nodes are reachable.
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>ERR_CLUSTER_CHECK (25)</option></term>
+        <listitem>
+          <para>
+            One or more nodes could not be reached.
+          </para>
+        </listitem>
+      </varlistentry>
+
+   </variablelist>
+  </refsect1>
+
 </refentry>
 

doc/repmgr-node-rejoin.sgml

@@ -45,6 +45,77 @@
     </para>
   </refsect1>
 
+  <refsect1>
+
+    <title>Options</title>
+    <variablelist>
+
+      <varlistentry>
+        <term><option>--dry-run</option></term>
+        <listitem>
+          <para>
+            Check prerequisites but don't actually execute the rejoin.
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--force-rewind[=/path/to/pg_rewind]</option></term>
+        <listitem>
+          <para>
+            Execute <application>pg_rewind</application> if necessary.
+          </para>
+          <para>
+            It is only necessary to provide the <application>pg_rewind</application>
+            if using PostgreSQL 9.3 or 9.4, and <application>pg_rewind</application>
+            is not installed in the PostgreSQL <filename>bin</filename> directory.
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--config-files</option></term>
+        <listitem>
+          <para>
+            comma-separated list of configuration files to retain after
+            executing <application>pg_rewind</application>.
+          </para>
+          <para>
+            Currently <application>pg_rewind</application> will overwrite
+            the local node's configuration files with the files from the source node,
+            so it's advisable to use this option to ensure they are kept.
+          </para>
+        </listitem>
+      </varlistentry>
+
+
+      <varlistentry>
+        <term><option>--config-archive-dir</option></term>
+        <listitem>
+          <para>
+            Directory to temporarily store configuration files specified with
+            <option>--config-files</option>; default: <filename>/tmp</filename>.
+          </para>
+        </listitem>
+      </varlistentry>
+
+
+      <varlistentry>
+        <term><option>-W/--no-wait</option></term>
+        <listitem>
+          <para>
+            Don't wait for the node to rejoin cluster.
+          </para>
+          <para>
+            If this option is supplied, &repmgr; will restart the node but
+            not wait for it to connect to the primary.
+          </para>
+        </listitem>
+      </varlistentry>
+
+    </variablelist>
+  </refsect1>
+
   <refsect1>
     <title>Event notifications</title>
     <para>
@@ -77,11 +148,18 @@
   </refsect1>
 
   <refsect1 id="repmgr-node-rejoin-pg-rewind" xreflabel="Using pg_rewind">
+
+   <indexterm>
+      <primary>pg_rewind</primary>
+      <secondary>using with "repmgr node rejoin"</secondary>
+    </indexterm>
+
     <title>Using <command>pg_rewind</command></title>
     <para>
       <command>repmgr node rejoin</command> can optionally use <command>pg_rewind</command> to re-integrate a
       node which has diverged from the rest of the cluster, typically a failed primary.
-      <command>pg_rewind</command> is available in PostgreSQL 9.5 and later.
+      <command>pg_rewind</command> is available in PostgreSQL 9.5 and later as part of the core distribution,
+      and can be installed from external sources for PostgreSQL 9.3 and 9.4.
     </para>
     <note>
       <para>

doc/repmgr-primary-register.sgml

@@ -26,7 +26,7 @@
   <refsect1>
     <title>Execution</title>
     <para>
-      Execute with the <literal>--dry-run</literal> option to check what would happen without
+      Execute with the <option>--dry-run</option> option to check what would happen without
       actually registering the primary.
     </para>
     <para>
@@ -36,7 +36,7 @@
 
     <note>
     <para>
-      If providing the configuration file location with <literal>-f/--config-file</literal>,
+      If providing the configuration file location with <option>-f/--config-file</option>,
       avoid using a relative path, as &repmgr; stores the configuration file location
       in the repmgr metadata for use when &repmgr; is executed remotely (e.g. during
       <xref linkend="repmgr-standby-switchover">). &repmgr; will attempt to convert the
@@ -48,6 +48,33 @@
     </note>
   </refsect1>
 
+  <refsect1>
+
+    <title>Options</title>
+    <variablelist>
+
+      <varlistentry>
+        <term><option>--dry-run</option></term>
+        <listitem>
+          <para>
+            Check prerequisites but don't actually register the primary.
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+       <term><option>-F</option>, <option>--force</option></term>
+        <listitem>
+          <para>
+            Overwrite an existing node record
+          </para>
+        </listitem>
+      </varlistentry>
+
+    </variablelist>
+  </refsect1>
+
+
   <refsect1>
     <title>Event notifications</title>
     <para>

doc/repmgr-primary-unregister.sgml

@@ -22,7 +22,7 @@
   <refsect1>
     <title>Execution</title>
     <para>
-      <command>repmgr primary unregister</command> should be run on the current primary,
+      <command>repmgr primary unregister</command> can be run on any active &repmgr; node,
       with the ID of the node to unregister passed as <option>--node-id</option>.
     </para>
     <para>

doc/repmgr-standby-clone.sgml

@@ -25,9 +25,11 @@
     <note>
       <simpara>
         <command>repmgr standby clone</command> does not start the standby, and after cloning
-        <command>repmgr standby register</command> must be executed to notify &repmgr; of its presence.
+        a standby, the command <command>repmgr standby register</command> must be executed to
+        notify &repmgr; of its existence.
       </simpara>
     </note>
+
   </refsect1>
 
 
@@ -65,7 +67,71 @@
    </tip>
   </refsect1>
 
-  <refsect1 id="repmgr-standby-clone-wal-management" xreflabel="Managing WAL during the cloning process">
+  <refsect1 id="repmgr-standby-clone-recovery-conf">
+   <indexterm>
+     <primary>recovery.conf</primary>
+     <secondary>customising with "repmgr standby clone"</secondary>
+   </indexterm>
+
+   <title>Customising recovery.conf</title>
+   <para>
+     By default, &repmgr; will create a minimal <filename>recovery.conf</filename>
+     containing following parameters:
+   </para>
+
+   <itemizedlist spacing="compact" mark="bullet">
+
+     <listitem>
+       <simpara><varname>standby_mode</varname> (always <literal>'on'</literal>)</simpara>
+     </listitem>
+
+     <listitem>
+       <simpara><varname>recovery_target_timeline</varname> (always <literal>'latest'</literal>)</simpara>
+     </listitem>
+
+     <listitem>
+       <simpara><varname>primary_conninfo</varname></simpara>
+     </listitem>
+
+     <listitem>
+       <simpara><varname>primary_slot_name</varname> (if replication slots in use)</simpara>
+     </listitem>
+
+   </itemizedlist>
+
+   <para>
+     The following additional parameters can be specified in <filename>repmgr.conf</filename>
+     for inclusion in <filename>recovery.conf</filename>:
+   </para>
+
+   <itemizedlist spacing="compact" mark="bullet">
+
+     <listitem>
+       <simpara><varname>restore_command</varname></simpara>
+     </listitem>
+
+     <listitem>
+       <simpara><varname>archive_cleanup_command</varname></simpara>
+     </listitem>
+
+     <listitem>
+       <simpara><varname>recovery_min_apply_delay</varname></simpara>
+     </listitem>
+
+   </itemizedlist>
+
+   <note>
+     <para>
+       We recommend using <ulink url="https://www.pgbarman.org/">Barman</ulink> to manage
+       WAL file archiving. For more details on combining &repmgr; and <application>Barman</application>,
+       in particular using <varname>restore_command</varname> to configure Barman as a backup source of
+       WAL files, see <xref linkend="cloning-from-barman">.
+     </para>
+   </note>
+
+  </refsect1>
+
+  <refsect1 id="repmgr-standby-clone-wal-management">
    <title>Managing WAL during the cloning process</title>
    <para>
     When initially cloning a standby, you will need to ensure
@@ -100,6 +166,164 @@
    </note>
   </refsect1>
 
+
+  <refsect1 id="repmgr-standby-create-recovery-conf">
+
+   <indexterm>
+     <primary>recovery.conf</primary>
+     <secondary>generating for a standby cloned by another method</secondary>
+   </indexterm>
+
+   <title>Using a standby cloned by another method</title>
+   <para>
+     &repmgr; supports standbys cloned by another method (e.g. using <application>barman</application>'s
+     <command><ulink url="http://docs.pgbarman.org/release/2.4/#recover">barman recover</ulink></command> command).
+   </para>
+   <para>
+     To integrate the standby as a &repmgr; node, ensure the <filename>repmgr.conf</filename>
+     file is created for the node, and that it has been registered using
+     <command><link linkend="repmgr-standby-register">repmgr standby register</link></command>.
+     Then execute the command <command>repmgr standby clone --recovery-conf-only</command>.
+     This will create the <filename>recovery.conf</filename> file needed to attach
+     the node to its upstream, and will also create a replication slot on the
+     upstream node if required.
+   </para>
+   <para>
+     Note that the upstream node must be running. An existing
+     <filename>recovery.conf</filename> will not be overwritten unless the
+     <option>-F/--force</option> option is provided.
+   </para>
+   <para>
+     Execute <command>repmgr standby clone --recovery-conf-only --dry-run</command>
+     to check the prerequisites for creating the <filename>recovery.conf</filename> file,
+     and display the contents of the file without actually creating it.
+   </para>
+
+   <note>
+     <para>
+       <option>--recovery-conf-only</option> was introduced in &repmgr; <link linkend="release-4.0.4">4.0.4</link>.
+     </para>
+   </note>
+
+  </refsect1>
+
+  <refsect1>
+
+    <title>Options</title>
+
+    <variablelist>
+
+      <varlistentry>
+        <term><option>--dry-run</option></term>
+        <listitem>
+          <para>
+            Check prerequisites but don't actually clone the standby.
+          </para>
+          <para>
+            If <option>--recovery-conf-only</option> specified, the contents of
+            the generated <filename>recovery.conf</filename> file will be displayed
+            but the file itself not written.
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>-c, --fast-checkpoint</option></term>
+        <listitem>
+          <para>
+            Force fast checkpoint (not effective when cloning from Barman).
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--copy-external-config-files[={samepath|pgdata}]</option></term>
+        <listitem>
+          <para>
+            Copy configuration files located outside the data directory on the source
+            node to the same path on the standby (default) or to the
+            PostgreSQL data directory.
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--no-upstream-connection</option></term>
+        <listitem>
+          <para>
+            When using Barman, do not connect to upstream node.
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>-R, --remote-user=USERNAME</option></term>
+        <listitem>
+          <para>
+            Remote system username for SSH operations (default: current local system username).
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option> --recovery-conf-only</option></term>
+        <listitem>
+          <para>
+            Create <filename>recovery.conf</filename> file for a previously cloned instance. &repmgr 4.0.4 and later.
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--replication-user</option></term>
+        <listitem>
+          <para>
+            User to make replication connections with (optional, not usually required).
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--superuser</option></term>
+        <listitem>
+          <para>
+            If the &repmgr; user is not a superuser, the name of a valid superuser must
+            be provided with this option.
+          </para>
+        </listitem>
+      </varlistentry>
+
+
+      <varlistentry>
+        <term><option>--upstream-conninfo</option></term>
+        <listitem>
+          <para>
+            <literal>primary_conninfo</literal> value to write in recovery.conf
+            when the intended upstream server does not yet exist.
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--upstream-node-id</option></term>
+        <listitem>
+          <para>
+            ID of the upstream node to replicate from (optional, defaults to primary node)
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term><option>--without-barman </option></term>
+        <listitem>
+          <para>
+            Do not use Barman even if configured.
+          </para>
+        </listitem>
+      </varlistentry>
+
+    </variablelist>
+  </refsect1>
+
   <refsect1>
     <title>Event notifications</title>
     <para>
@@ -107,5 +331,11 @@
     </para>
   </refsect1>
 
+  <refsect1>
+    <title>See also</title>
+    <para>
+      See <xref linkend="cloning-standbys"> for details about various aspects of cloning.
+    </para>
+  </refsect1>
 </refentry>
 

doc/repmgr-standby-follow.sgml

@@ -26,10 +26,19 @@
       running. It can only be used to attach an active standby to the current primary node
    (and not to another standby).
     </para>
-    <para>
+	<tip>
-      To re-add an inactive node to the replication cluster, see
+      <para>
-      <xref linkend="repmgr-node-rejoin">
+		To re-add an inactive node to the replication cluster, use
-    </para>
+		<xref linkend="repmgr-node-rejoin">.
+      </para>
+	</tip>
+
+	<para>
+	  <command>repmgr standby follow</command> will wait up to
+	  <varname>standby_follow_timeout</varname> seconds (default: <literal>30</literal>)
+	  to verify the standby has actually connected to the new primary.
+	</para>
+
   </refsect1>
 
   <refsect1>
@@ -70,11 +79,14 @@
       </varlistentry>
 
       <varlistentry>
-        <term><option>-W</option></term>
+        <term><option>-w</option></term>
         <term><option>--wait</option></term>
         <listitem>
           <para>
-            Wait for a primary to appear.
+            Wait for a primary to appear. &repmgr; will wait for up to
+            <varname>primary_follow_timeout</varname> seconds
+            (default: 60 seconds) to verify that the standby is following the new primary.
+            This value can be defined in <filename>repmgr.conf</filename>.
           </para>
         </listitem>
       </varlistentry>
@@ -88,7 +100,7 @@
       A <literal>standby_follow</literal> <link linkend="event-notifications">event notification</link> will be generated.
     </para>
     <para>
-      If provided, &repmgr; will subsitute the placeholders <literal>%p</literal> with the node ID of the primary
+      If provided, &repmgr; will substitute the placeholders <literal>%p</literal> with the node ID of the primary
       being followed, <literal>%c</literal> with its <literal>conninfo</literal> string, and
       <literal>%a</literal> with its node name.
     </para>

doc/repmgr-standby-promote.sgml

@@ -26,6 +26,12 @@
       by using <xref linkend="repmgr-standby-follow">; if <application>repmgrd</application>
         is active, it will handle this automatically.
     </para>
+    <para>
+      Note that &repmgr; will wait for up to <varname>promote_check_timeout</varname> seconds
+      (default: 60 seconds) to verify that the standby has been promoted, and will
+      check the promotion every <varname>promote_check_interval</varname> seconds (default: 1 second).
+      Both values can be defined in <filename>repmgr.conf</filename>.
+    </para>
   </refsect1>
 
   <refsect1>
@@ -42,6 +48,7 @@
     </para>
   </refsect1>
 
+
   <refsect1>
     <title>Event notifications</title>
     <para>

doc/repmgr-standby-register.sgml

@@ -92,6 +92,73 @@
    </para>
   </refsect1>
 
+  <refsect1 id="repmgr-standby-register-node-cloned-other-source">
+    <title>Registering a node not cloned by repmgr</title>
+    <para>
+      If you've cloned a standby using another method (e.g. <application>barman</application>'s
+     <command>barman recover</command> command), first execute
+     <link linkend="repmgr-standby-create-recovery-conf">repmgr standby clone --recovery-conf-only</link>
+     to add the <filename>recovery.conf</filename> file, then register the standby as usual.
+    </para>
+  </refsect1>
+
+  <refsect1>
+
+    <title>Options</title>
+
+    <variablelist>
+
+      <varlistentry>
+        <term><option>--dry-run</option></term>
+        <listitem>
+          <para>
+            Check prerequisites but don't actually register the standby.
+          </para>
+        </listitem>
+      </varlistentry>
+
+
+      <varlistentry>
+       <term><option>-F</option><option>--force</option></term>
+        <listitem>
+          <para>
+            Overwrite an existing node record
+          </para>
+        </listitem>
+      </varlistentry>
+
+
+      <varlistentry>
+        <term><option>--upstream-node-id</option></term>
+        <listitem>
+          <para>
+            ID of the upstream node to replicate from (optional)
+          </para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--wait-start</option></term>
+        <listitem>
+          <para>
+            wait for the standby to start (timeout in seconds, default 30 seconds)
+          </para>
+        </listitem>
+      </varlistentry>
+
+     <varlistentry>
+        <term><option>--wait-sync</option></term>
+        <listitem>
+          <para>
+            wait for the node record to synchronise to the standby (optional timeout in seconds)
+          </para>
+        </listitem>
+      </varlistentry>
+
+
+    </variablelist>
+  </refsect1>
+
   <refsect1>
     <title>Event notifications</title>
     <para>
@@ -106,7 +173,7 @@
     </para>
 
     <para>
-      If provided, &repmgr; will subsitute the placeholders <literal>%p</literal> with the node ID of the
+      If provided, &repmgr; will substitute the placeholders <literal>%p</literal> with the node ID of the
       primary node, <literal>%c</literal> with its <literal>conninfo</literal> string, and
       <literal>%a</literal> with its node name.
     </para>

doc/repmgr-standby-switchover.sgml

@@ -35,6 +35,10 @@
         a successful switchover.
       </para>
     </note>
+    <para>
+      For more details on performing a switchover, including preparation and configuration,
+      see section <xref linkend="performing-switchover">.
+    </para>
   </refsect1>
 
   <refsect1>
@@ -84,11 +88,14 @@
       </varlistentry>
 
       <varlistentry>
-        <term><option>--force-rewind</option></term>
+        <term><option>--force-rewind[=/path/to/pg_rewind]</option></term>
         <listitem>
           <para>
             Use <application>pg_rewind</application> to reintegrate the old primary if necessary
-            (PostgreSQL 9.5 and later).
+            (and the prerequisites for using <application>pg_rewind</application> are met).
+            If using PostgreSQL 9.3 or 9.4, and the <application>pg_rewind</application>
+            binary is not installed in the PostgreSQL <filename>bin</filename> directory,
+            provide its full path. For more details see also <xref linkend="switchover-pg-rewind">.
           </para>
         </listitem>
       </varlistentry>
@@ -115,6 +122,48 @@
 
   </refsect1>
 
+  <refsect1>
+    <title>Configuration file settings</title>
+
+    <para>
+     Note that following parameters in <filename>repmgr.conf</filename> are relevant to the
+     switchover operation:
+     <itemizedlist spacing="compact" mark="bullet">
+       <listitem>
+         <simpara>
+           <literal>reconnect_attempts</literal>: number of times to check the original primary
+           for a clean shutdown after executing the shutdown command, before aborting
+         </simpara>
+       </listitem>
+       <listitem>
+         <simpara>
+           <literal>reconnect_interval</literal>: interval (in seconds) to check the original
+           primary for a clean shutdown after executing the shutdown command (up to a maximum
+           of <literal>reconnect_attempts</literal> tries)
+         </simpara>
+       </listitem>
+       <listitem>
+         <simpara>
+           <literal>replication_lag_critical</literal>:
+           if replication lag (in seconds) on the standby exceeds this value, the
+           switchover will be aborted (unless the <literal>-F/--force</literal> option
+           is provided)
+         </simpara>
+       </listitem>
+
+       <listitem>
+         <simpara>
+           <literal>standby_reconnect_timeout</literal>:
+           Number of seconds to attempt to reconnect to the demoted primary
+           once it has been restarted.
+         </simpara>
+       </listitem>
+
+     </itemizedlist>
+    </para>
+  </refsect1>
+
+
   <refsect1>
     <title>Execution</title>
 
@@ -150,7 +199,7 @@
   <refsect1>
     <title>Exit codes</title>
     <para>
-      Following exit codes can be emitted by <literal>repmgr standby switchover</literal>:
+      Following exit codes can be emitted by <command>repmgr standby switchover</command>:
     </para>
     <variablelist>
 
@@ -178,7 +227,7 @@
           <para>
             The switchover was executed but a problem was encountered.
             Typically this means the former primary could not be reattached
-            as a standby.
+            as a standby. Check preceding log messages for more information.
           </para>
         </listitem>
       </varlistentry>

doc/repmgr-standby-unregister.sgml

@@ -43,6 +43,22 @@
     </para>
   </refsect1>
 
+  <refsect1>
+    <title>Options</title>
+    <variablelist>
+
+      <varlistentry>
+        <term><option>--node-id</option></term>
+        <listitem>
+          <para>
+            <varname>node_id</varname> of the node to unregister (optional)
+          </para>
+        </listitem>
+      </varlistentry>
+
+    </variablelist>
+  </refsect1>
+
   <refsect1>
     <title>Event notifications</title>
     <para>

doc/repmgrd-configuration.sgml

@@ -1,60 +1,233 @@
 <chapter id="repmgrd-configuration">
 
- <indexterm>
+  <indexterm>
-   <primary>repmgrd</primary>
+    <primary>repmgrd</primary>
-   <secondary>configuration</secondary>
+    <secondary>configuration</secondary>
- </indexterm>
+  </indexterm>
 
- <title>repmgrd configuration</title>
+  <title>repmgrd configuration</title>
- <para>
-  To use <application>repmgrd</application>, its associated function library must be
-  included in <filename>postgresql.conf</filename> with:
 
-  <programlisting>
+  <para>
-    shared_preload_libraries = 'repmgr'</programlisting>
+    <application>repmgrd</application> is a daemon which runs on each PostgreSQL node,
- </para>
+    monitoring the local node, and (unless it's the primary node) the upstream server
- <para>
+    (the primary server or with cascading replication, another standby) which it's
-  Changing this setting requires a restart of PostgreSQL; for more details see
+    connected to.
-  the <ulink url="https://www.postgresql.org/docs/current/static/runtime-config-client.html#GUC-SHARED-PRELOAD-LIBRARIES">PostgreSQL documentation</ulink>.
+  </para>
- </para>
+  <para>
- <para>
+    <application>repmgrd</application> can be configured to provide failover
-  Additionally the following <application>repmgrd</application> options *must* be set in
+    capability in case the primary upstream node becomes unreachable, and/or
-  <filename>repmgr.conf</filename> (adjust configuration file locations as appropriate):
+    provide monitoring data to the &repmgr; metadatabase.
-  <programlisting>
+  </para>
-    failover=automatic
+
-    promote_command='repmgr standby promote -f /etc/repmgr.conf --log-to-file'
+  <sect1 id="repmgrd-basic-configuration">
-    follow_command='repmgr standby follow -f /etc/repmgr.conf --log-to-file --upstream-node-id=%n'</programlisting>
+    <title>repmgrd basic configuration</title>
- </para>
+
- <para>
+    <para>
-  Note that the <literal>--log-to-file</literal> option will cause
+      To use <application>repmgrd</application>, its associated function library <emphasis>must</emphasis> be
-  output generated by the &repmgr; command, when executed by <application>repmgrd</application>,
+      included in <filename>postgresql.conf</filename> with:
-  to be logged to the same destination configured to receive log output for <application>repmgrd</application>.
+
-  See <filename>repmgr.conf.sample</filename> for further <application>repmgrd</application>-specific settings.
+      <programlisting>
- </para>
+        shared_preload_libraries = 'repmgr'</programlisting>
- <para>
+    </para>
-  When <varname>failover</varname> is set to <literal>automatic</literal>, upon detecting failure
+    <para>
-  of the current  primary, <application>repmgrd</application> will execute one of
+      Changing this setting requires a restart of PostgreSQL; for more details see
-  <varname>promote_command</varname> or <varname>follow_command</varname>,
+      the <ulink url="https://www.postgresql.org/docs/current/static/runtime-config-client.html#GUC-SHARED-PRELOAD-LIBRARIES">PostgreSQL documentation</ulink>.
-  depending on whether the current server is to become the new primary, or
+    </para>
-  needs to follow another server which has become the new primary. Note that
+
-  these commands can be any valid shell script which results in one of these
+    <sect2 id="repmgrd-automatic-failover-configuration">
-  two actions happening, but if &repmgr;'s <command>standby follow</command> or
+      <title>automatic failover configuration</title>
-  <command>standby promote</command>
+      <para>
-  commands are not executed (either directly as shown here, or from a script which
+        If using automatic failover, the following <application>repmgrd</application> options *must* be set in
-  performs other actions), the &repmgr; metadata will not be updated and
+        <filename>repmgr.conf</filename> :
-  &repmgr; will no longer function reliably.
+        <programlisting>
- </para>
+          failover=automatic
- <para>
+          promote_command='/usr/bin/repmgr standby promote -f /etc/repmgr.conf --log-to-file'
-  The <varname>follow_command</varname> should provide the <literal>--upstream-node-id=%n</literal>
+          follow_command='/usr/bin/repmgr standby follow -f /etc/repmgr.conf --log-to-file --upstream-node-id=%n'</programlisting>
-  option to <command>repmgr standby follow</command>; the <literal>%n</literal> will be replaced by
+      </para>
-  <application>repmgrd</application> with the ID of the new primary node. If this is not provided, &repmgr;
+      <para>
-  will attempt to determine the new primary by itself, but  if the
+        Adjust file paths as appropriate; we recomment specifying the full path to the &repmgr; binary.
-  original primary comes back online after the new primary is promoted, there is a risk that
+      </para>
-  <command>repmgr standby follow</command> will result in the node continuing to follow
+      <para>
-  the original primary.
+        Note that the <literal>--log-to-file</literal> option will cause
- </para>
+        output generated by the &repmgr; command, when executed by <application>repmgrd</application>,
- <sect1 id="repmgrd-connection-settings">
+        to be logged to the same destination configured to receive log output for <application>repmgrd</application>.
- <title>repmgrd connection settings</title>
+        See <filename><ulink url="https://raw.githubusercontent.com/2ndQuadrant/repmgr/master/repmgr.conf.sample">repmgr.conf.sample</ulink></filename>
+        for further <application>repmgrd</application>-specific settings.
+      </para>
+      <para>
+        When <varname>failover</varname> is set to <literal>automatic</literal>, upon detecting failure
+        of the current  primary, <application>repmgrd</application> will execute one of:
+      </para>
+      <itemizedlist spacing="compact" mark="bullet">
+        <listitem>
+          <simpara>
+            <varname>promote_command</varname> (if the current server is to become the new primary)
+          </simpara>
+        </listitem>
+        <listitem>
+          <simpara>
+            <varname>follow_command</varname> (if the current server needs to follow another server which has
+            become the new primary)
+          </simpara>
+        </listitem>
+      </itemizedlist>
+      <note>
+        <para>
+          These commands can be any valid shell script which results in one of these
+          two actions happening, but if &repmgr;'s <command>standby follow</command> or
+          <command>standby promote</command>
+          commands are not executed (either directly as shown here, or from a script which
+          performs other actions), the &repmgr; metadata will not be updated and
+          &repmgr; will no longer function reliably.
+        </para>
+      </note>
+
+      <para>
+        The <varname>follow_command</varname> should provide the <literal>--upstream-node-id=%n</literal>
+        option to <command>repmgr standby follow</command>; the <literal>%n</literal> will be replaced by
+        <application>repmgrd</application> with the ID of the new primary node. If this is not provided, &repmgr;
+        will attempt to determine the new primary by itself, but if the
+        original primary comes back online after the new primary is promoted, there is a risk that
+        <command>repmgr standby follow</command> will result in the node continuing to follow
+        the original primary.
+      </para>
+    </sect2>
+
+    <sect2 id="repmgrd-service-configuration">
+      <indexterm>
+        <primary>repmgrd</primary>
+        <secondary>PostgreSQL service configuration</secondary>
+      </indexterm>
+      <title>PostgreSQL service configuration</title>
+      <para>
+        If using automatic failover, currently <application>repmgrd</application> will need to execute
+        <link linkend="repmgr-standby-follow"><command>repmgr standby follow</command></link>
+        to restart PostgreSQL on standbys to have them follow a new primary.
+      </para>
+      <para>
+        To ensure this happens smoothly, it's essential to provide the appropriate system/service restart
+        command appropriate to your operating system via <varname>service_restart_command</varname>
+        in <filename>repmgr.conf</filename>. If you don't do this, <application>repmgrd</application>
+        will default to using <command>pg_ctl</command>, which can result in unexpected problems,
+        particularly on <application>systemd</application>-based systems.
+      </para>
+      <para>
+        For more details, see <xref linkend="configuration-service-commands">.
+      </para>
+    </sect2>
+
+    <sect2 id="repmgrd-monitoring-configuration">
+      <indexterm>
+        <primary>repmgrd</primary>
+        <secondary>monitoring configuration</secondary>
+      </indexterm>
+      <title>Monitoring configuration</title>
+      <para>
+        To enable monitoring, set:
+        <programlisting>
+          monitoring_history=yes</programlisting>
+        in <filename>repmgr.conf</filename>.
+      </para>
+      <para>
+        The default monitoring interval is 2 seconds; this value can be explicitly set using:
+        <programlisting>
+          monitor_interval_secs=&lt;seconds&gt;</programlisting>
+        in <filename>repmgr.conf</filename>.
+      </para>
+      <para>
+        For more details on monitoring, see <xref linkend="repmgrd-monitoring">.
+      </para>
+    </sect2>
+
+  </sect1>
+
+  <sect1 id="repmgrd-daemon">
+    <indexterm>
+      <primary>repmgrd</primary>
+      <secondary>starting and stopping</secondary>
+    </indexterm>
+    <title>repmgrd daemon</title>
+    <para>
+      If installed from a package, the <application>repmgrd</application> can be started
+      via the operating system's service command, e.g. in <application>systemd</application>
+      using <command>systemctl</command>.
+    </para>
+    <para>
+      See appendix <xref linkend="appendix-packages"> for details of service commands
+      for different distributions.
+    </para>
+    <para>
+      <application>repmgrd</application> can be started manually like this:
+      <programlisting>
+        repmgrd -f /etc/repmgr.conf --pid-file /tmp/repmgrd.pid --daemonize</programlisting>
+      and stopped with <command>kill `cat /tmp/repmgrd.pid`</command>. Adjust paths as appropriate.
+    </para>
+    <para>
+      To apply configuration file changes to a running <application>repmgrd</application>
+      daemon, execute the operating system's service reload command (for manually started
+      instances, execute <command>kill -HUP `cat /tmp/repmgrd.pid`</command>).
+      Note that only a subset of configuration file parameters can be changed on a
+      running <application>repmgrd</application> daemon.
+    </para>
+
+    <sect2 id="repmgrd-configuration-debian-ubuntu">
+      <indexterm>
+        <primary>repmgrd</primary>
+        <secondary>Debian/Ubuntu and daemon configuration</secondary>
+      </indexterm>
+      <indexterm>
+        <primary>Debian/Ubuntu</primary>
+        <secondary>repmgrd daemon configuration</secondary>
+      </indexterm>
+
+      <title>repmgrd daemon configuration on Debian/Ubuntu</title>
+
+      <para>
+        If &repmgr; was installed from Debian/Ubuntu packages, additional configuration
+        is required before <application>repmgrd</application> is started as a daemon.
+      </para>
+      <para>
+        This is done via the file <filename>/etc/default/repmgrd</filename>, which by default
+        looks like this:
+        <programlisting>
+# default settings for repmgrd. This file is source by /bin/sh from
+# /etc/init.d/repmgrd
+
+# disable repmgrd by default so it won't get started upon installation
+# valid values: yes/no
+REPMGRD_ENABLED=no
+
+# configuration file (required)
+#REPMGRD_CONF="/path/to/repmgr.conf"
+
+# additional options
+#REPMGRD_OPTS=""
+
+# user to run repmgrd as
+#REPMGRD_USER=postgres
+
+# repmgrd binary
+#REPMGRD_BIN=/usr/bin/repmgrd
+
+# pid file
+#REPMGRD_PIDFILE=/var/run/repmgrd.pid</programlisting>
+      </para>
+      <para>
+        Set <varname>REPMGRD_ENABLED</varname> to <literal>yes</literal>, and <varname>REPMGRD_CONF</varname>
+        to the <filename>repmgr.conf</filename> file you are using.
+      </para>
+      <para>
+        If using <application>systemd</application>, you may need to execute <command>systemctl daemon-reload</command>.
+        Also, if you attempted to start <application>repmgrd</application> using <command>systemctl start repmgrd</command>,
+        you'll need to execute <command>systemctl stop repmgrd</command>. Because that's how <application>systemd</application>
+        rolls.
+      </para>
+
+    </sect2>
+  </sect1>
+
+  <sect1 id="repmgrd-connection-settings">
+    <title>repmgrd connection settings</title>
  <para>
   In addition to the &repmgr; configuration settings, parameters in the
   <varname>conninfo</varname> string influence how &repmgr; makes a network connection to
@@ -76,12 +249,21 @@
   <ulink url="https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-PARAMKEYWORDS">PostgreSQL documentation</ulink>.
  </para>
  </sect1>
+
+
+
  <sect1 id="repmgrd-log-rotation">
+   <indexterm>
+     <primary>log rotation</primary>
+     <secondary>repmgrd</secondary>
+   </indexterm>
+
   <title>repmgrd log rotation</title>
   <para>
-   To ensure the current <application>repmgrd</application> logfile does not grow
+   To ensure the current <application>repmgrd</application> logfile
-   indefinitely, configure your system's <command>logrotate</command> to
+   (specified in <filename>repmgr.conf</filename> with the parameter
-   regularly rotate it.
+   <option>log_file</option> does not grow indefinitely, configure your
+   system's <command>logrotate</command> to regularly rotate it.
   </para>
   <para>
    Sample configuration to rotate logfiles weekly with retention for

doc/repmgrd-degraded-monitoring.sgml

@@ -40,7 +40,7 @@
    </listitem>
 
    <listitem>
-    <simpara>repmgrd is monitoring the primary node, but it is not available</simpara>
+    <simpara>repmgrd is monitoring the primary node, but it is not available (and no other node has been promoted as primary)</simpara>
    </listitem>
   </itemizedlist>
  </para>
@@ -69,7 +69,15 @@
   By default, <literal>repmgrd</literal> will continue in degraded monitoring mode indefinitely.
   However a timeout (in seconds) can be set with <varname>degraded_monitoring_timeout</varname>,
   after which <application>repmgrd</application> will terminate.
-
  </para>
 
+ <note>
+   <para>
+     If <application>repmgrd</application> is monitoring a primary mode which has been stopped
+     and manually restarted as a standby attached to a new primary, it will automatically detect
+     the status change and update the node record to reflect the node's new status
+     as an active standby. It will then resume monitoring the node as a standby.
+   </para>
+ </note>
+
 </chapter>

doc/repmgrd-monitoring.sgml

@@ -3,6 +3,10 @@
    <primary>repmgrd</primary>
    <secondary>monitoring</secondary>
  </indexterm>
+ <indexterm>
+   <primary>monitoring</primary>
+   <secondary>with repmgrd</secondary>
+ </indexterm>
 
  <title>Monitoring with repmgrd</title>
  <para>

doc/switchover.sgml

@@ -67,13 +67,21 @@
      promotion candidate to all standbys attached to the demotion candidate.
    </para>
 
+   <note>
+     <simpara>
+       &repmgr; expects to find the &repmgr; binary in the same path on the remote
+       server as on the local server.
+     </simpara>
+   </note>
+
    <para>
     Double-check which commands will be used to stop/start/restart the current
-    primary; on the primary execute:
+    primary; on the current primary execute:
     <programlisting>
      repmgr -f /etc/repmgr.conf node service --list --action=stop
      repmgr -f /etc/repmgr.conf node service --list --action=start
      repmgr -f /etc/repmgr.conf node service --list --action=restart</programlisting>
+
    </para>
 
    <para>
@@ -92,7 +100,11 @@
      <para>
        If the <option>service_*_command</option> options aren't defined, &repmgr; will
        fall back to using <application>pg_ctl</application> to stop/start/restart
-       PostgreSQL, which may not work properly.
+       PostgreSQL, which may not work properly, particularly when executed on a remote
+       server.
+     </para>
+     <para>
+       For more details, see <xref linkend="configuration-service-commands">.
      </para>
    </important>
 
@@ -109,6 +121,7 @@
     </simpara>
    </note>
 
+
    <para>
     Check that access from applications is minimalized or preferably blocked
     completely, so applications are not unexpectedly interrupted.
@@ -163,34 +176,60 @@
      </para>
    </important>
 
-   <para>
-     Note that following parameters in <filename>repmgr.conf</filename> are relevant to the
-     switchover operation:
-     <itemizedlist spacing="compact" mark="bullet">
-       <listitem>
-         <simpara>
-           <literal>reconnect_attempts</literal>: number of times to check the original primary
-           for a clean shutdown after executing the shutdown command, before aborting
-         </simpara>
-       </listitem>
-       <listitem>
-         <simpara>
-           <literal>reconnect_interval</literal>: interval (in seconds) to check the original
-           primary for a clean shutdown after executing the shutdown command (up to a maximum
-           of <literal>reconnect_attempts</literal> tries)
-         </simpara>
-       </listitem>
-       <listitem>
-         <simpara>
-           <literal>replication_lag_critical</literal>:
-           if replication lag (in seconds) on the standby exceeds this value, the
-           switchover will be aborted (unless the <literal>-F/--force</literal> option
-           is provided)
-         </simpara>
-       </listitem>
 
-     </itemizedlist>
+   <note>
-   </para>
+     <simpara>
+       See <xref linkend="repmgr-standby-switchover"> for a full list of available
+       command line options and <filename>repmgr.conf</filename> settings relevant
+       to performing a switchover.
+     </simpara>
+   </note>
+
+  <sect2 id="switchover-pg-rewind" xreflabel="Switchover and pg_rewind">
+    <indexterm>
+      <primary>pg_rewind</primary>
+      <secondary>using with "repmgr standby switchover"</secondary>
+    </indexterm>
+    <title>Switchover and pg_rewind</title>
+    <para>
+      If the demotion candidate does not shut down smoothly or cleanly, there's a risk it
+      will have a slightly divergent timeline and will not be able to attach to the new
+      primary. To fix this situation without needing to reclone the old primary, it's
+      possible to use the <application>pg_rewind</application> utility, which will usually be
+      able to resync the two servers.
+    </para>
+    <para>
+      To have &repmgr; execute <application>pg_rewind</application> if it detects this
+      situation after promoting the new primary, add the <option>--force-rewind</option>
+      option.
+    </para>
+    <note>
+      <simpara>
+        If &repmgr; detects a situation where it needs to execute <application>pg_rewind</application>,
+        it will execute a <literal>CHECKPOINT</literal> on the new primary before executing
+        <application>pg_rewind</application>.
+      </simpara>
+    </note>
+    <para>
+      For more details on <application>pg_rewind</application>, see:
+      <ulink url="https://www.postgresql.org/docs/current/static/app-pgrewind.html">https://www.postgresql.org/docs/current/static/app-pgrewind.html</ulink>.
+    </para>
+    <para>
+      <application>pg_rewind</application> has been part of the core PostgreSQL distribution since
+      version 9.5. Users of versions 9.3 and 9.4 will need to manually install it; the source code is available here:
+      <ulink url="https://github.com/vmware/pg_rewind">https://github.com/vmware/pg_rewind</ulink>.
+      If the <application>pg_rewind</application>
+      binary is not installed in the PostgreSQL <filename>bin</filename> directory, provide
+      its full path  on the demotion candidate  with <option>--force-rewind</option>.
+    </para>
+    <para>
+      Note that building the 9.3/9.4 version of <application>pg_rewind</application> requires the PostgreSQL
+      source code. Also, PostgreSQL 9.3 does not provide <varname>wal_log_hints</varname>,
+      meaning data checksums must have been enabled when the database was initialized.
+    </para>
+  </sect2>
+
+
  </sect1>
 
  <sect1 id="switchover-execution" xreflabel="Executing the switchover command">

doc/version.sgml

@@ -1 +1 @@
-<!ENTITY repmgrversion "4.0.3">
+<!ENTITY repmgrversion "4.0.6">

errcode.h

@@ -44,5 +44,8 @@
 #define ERR_REGISTRATION_SYNC 20
 #define ERR_OUT_OF_MEMORY 21
 #define ERR_SWITCHOVER_INCOMPLETE 22
+#define ERR_FOLLOW_FAIL 23
+#define ERR_REJOIN_FAIL 24
+#define ERR_CLUSTER_CHECK 25
 
 #endif							/* _ERRCODE_H_ */

log.c

@@ -329,6 +329,13 @@ logger_set_terse(void)
 }
 
 
+void
+logger_set_min_level(int min_log_level)
+{
+	if (min_log_level > log_level)
+		log_level = min_log_level;
+}
+
 int
 detect_log_level(const char *level)
 {

log.h

@@ -128,6 +128,7 @@ bool		logger_shutdown(void);
 
 void		logger_set_verbose(void);
 void		logger_set_terse(void);
+void		logger_set_min_level(int min_log_level);
 
 void
 log_detail(const char *fmt,...)

repmgr-action-cluster.c

@@ -569,6 +569,8 @@ do_cluster_crosscheck(void)
 
 	t_node_status_cube **cube;
 
+	bool		error_found = false;
+
 	n = build_cluster_crosscheck(&cube, &name_length);
 	if (runtime_options.output_mode == OM_CSV)
 	{
@@ -648,9 +650,11 @@ do_cluster_crosscheck(void)
 				{
 					case -2:
 						c = '?';
+						error_found = true;
 						break;
 					case -1:
 						c = 'x';
+						error_found = true;
 						break;
 					case 0:
 						c = '*';
@@ -689,6 +693,11 @@ do_cluster_crosscheck(void)
 
 		free(cube);
 	}
+
+	if (error_found == true)
+	{
+		exit(ERR_CLUSTER_CHECK);
+	}
 }
 
 
@@ -704,6 +713,8 @@ do_cluster_matrix()
 
 	t_node_matrix_rec **matrix_rec_list;
 
+	bool		error_found = false;
+
 	n = build_cluster_matrix(&matrix_rec_list, &name_length);
 
 	if (runtime_options.output_mode == OM_CSV)
@@ -742,9 +753,11 @@ do_cluster_matrix()
 				{
 					case -2:
 						c = '?';
+						error_found = true;
 						break;
 					case -1:
 						c = 'x';
+						error_found = true;
 						break;
 					case 0:
 						c = '*';
@@ -770,6 +783,11 @@ do_cluster_matrix()
 	}
 
 	free(matrix_rec_list);
+
+	if (error_found == true)
+	{
+		exit(ERR_CLUSTER_CHECK);
+	}
 }
 
 
@@ -964,8 +982,7 @@ build_cluster_matrix(t_node_matrix_rec ***matrix_rec_dest, int *name_length)
 
 		initPQExpBuffer(&command_output);
 
-		(void) remote_command(
+		(void) remote_command(host,
-							  host,
 							  runtime_options.remote_user,
 							  command.data,
 							  &command_output);
@@ -1144,9 +1161,8 @@ build_cluster_crosscheck(t_node_status_cube ***dest_cube, int *name_length)
 		/* fix to work with --node-id */
 		if (cube[i]->node_id == config_file_options.node_id)
 		{
-			(void) local_command(
+			(void) local_command_simple(command.data,
-								 command.data,
+										&command_output);
-								 &command_output);
 		}
 		else
 		{
@@ -1170,8 +1186,7 @@ build_cluster_crosscheck(t_node_status_cube ***dest_cube, int *name_length)
 
 			log_verbose(LOG_DEBUG, "build_cluster_crosscheck(): executing\n  %s", quoted_command.data);
 
-			(void) remote_command(
+			(void) remote_command(host,
-								  host,
 								  runtime_options.remote_user,
 								  quoted_command.data,
 								  &command_output);

repmgr-action-node.c

@@ -92,7 +92,7 @@ do_node_status(void)
 
 	/* Check node exists and is really a standby */
 
-	if (get_node_record(conn, config_file_options.node_id, &node_info) != RECORD_FOUND)
+	if (get_node_record_with_upstream(conn, config_file_options.node_id, &node_info) != RECORD_FOUND)
 	{
 		log_error(_("no record found for node %i"), config_file_options.node_id);
 		PQfinish(conn);
@@ -308,14 +308,16 @@ do_node_status(void)
 
 	/*
 	 * check for missing replication slots - we do this regardless of
-	 * what "max_replication_slots" is set to
+	 * what "max_replication_slots" is set to, in case the downstream
+	 * node was configured with "use_replication_slots=true" and is
+	 * expecting a replication slot to be available
 	 */
 
 	{
 		NodeInfoList missing_slots = T_NODE_INFO_LIST_INITIALIZER;
-		get_downsteam_nodes_with_missing_slot(conn,
+		get_downstream_nodes_with_missing_slot(conn,
-											  config_file_options.node_id,
+											   config_file_options.node_id,
-											  &missing_slots);
+											   &missing_slots);
 
 		if (missing_slots.node_count > 0)
 		{
@@ -938,6 +940,7 @@ do_node_check_replication_connection(void)
 		return;
 	}
 
+	/* retrieve remote node record from local database */
 	local_conn = establish_db_connection(config_file_options.conninfo, true);
 
 	record_status = get_node_record(local_conn, runtime_options.remote_node_id, &node_record);
@@ -954,8 +957,12 @@ do_node_check_replication_connection(void)
 	initialize_conninfo_params(&remote_conninfo, false);
 	parse_conninfo_string(node_record.conninfo, &remote_conninfo, NULL, false);
 
+	if (strcmp(param_get(&remote_conninfo, "user"), node_record.repluser) != 0)
+	{
+		param_set(&remote_conninfo, "user", node_record.repluser);
+		param_set(&remote_conninfo, "dbname", "replication");
+	}
 	param_set(&remote_conninfo, "replication", "1");
-	param_set(&remote_conninfo, "user", node_record.repluser);
 
 	repl_conn = establish_db_connection_by_params(&remote_conninfo, false);
 
@@ -1511,7 +1518,7 @@ do_node_service(void)
 
 	if (data_dir_required_for_action(action))
 	{
-		get_node_data_directory(data_dir);
+		get_node_config_directory(data_dir);
 
 		if (data_dir[0] == '\0')
 		{
@@ -1599,7 +1606,7 @@ _do_node_service_list_actions(t_server_action action)
 
 	if (data_dir_required == true)
 	{
-		get_node_data_directory(data_dir);
+		get_node_config_directory(data_dir);
 	}
 
 	/* show command for specific action only */
@@ -1665,6 +1672,13 @@ parse_server_action(const char *action_name)
  *
  * Note that "repmgr node rejoin" is also executed by
  * "repmgr standby switchover" after promoting the new primary.
+ *
+ * Parameters:
+ *   --dry-run
+ *   --force-rewind[=VALUE]
+ *   --config-files
+ *   --config-archive-dir
+ *   -W/--no-wait
  */
 void
 do_node_rejoin(void)
@@ -1726,7 +1740,7 @@ do_node_rejoin(void)
 		{
 			log_error(_("database is not shut down cleanly"));
 
-			if (runtime_options.force_rewind == true)
+			if (runtime_options.force_rewind_used == true)
 			{
 				log_detail(_("pg_rewind will not be able to run"));
 			}
@@ -1756,7 +1770,17 @@ do_node_rejoin(void)
 	PQfinish(upstream_conn);
 
 	/* connect to registered primary and check it's not in recovery */
-	upstream_conn = establish_db_connection(primary_node_record.conninfo, true);
+	upstream_conn = establish_db_connection(primary_node_record.conninfo, false);
+
+	if (PQstatus(upstream_conn) != CONNECTION_OK)
+	{
+		log_error(_("unable to connect to current primary \"%s\" (node ID: %i)"),
+				  primary_node_record.node_name,
+				  primary_node_record.node_id);
+		log_detail(_("primay node conninfo is: \"%s\""),
+				   primary_node_record.conninfo);
+		exit(ERR_BAD_CONFIG);
+	}
 
 	upstream_recovery_type = get_recovery_type(upstream_conn);
 
@@ -1772,30 +1796,33 @@ do_node_rejoin(void)
 	}
 
 	/*
-	 * If --force-rewind specified, check pg_rewind can be used, and
+	 * --force-rewind specified - check prerequisites, and attempt to execute
-	 * pre-emptively fetch the list of configuration files which should be
+  	 * (if --dry-run provided, just output the command which would be executed)
-	 * archived
 	 */
 
-	if (runtime_options.force_rewind == true)
+
+	if (runtime_options.force_rewind_used == true)
 	{
-		PQExpBufferData reason;
 		PQExpBufferData msg;
+		PQExpBufferData	filebuf;
+		int				ret;
 
-		initPQExpBuffer(&reason);
+		/*
+		 * Check that pg_rewind can be used
+		 */
 
-		if (can_use_pg_rewind(upstream_conn, config_file_options.data_directory, &reason) == false)
+		initPQExpBuffer(&msg);
+
+		if (can_use_pg_rewind(upstream_conn, config_file_options.data_directory, &msg) == false)
 		{
 			log_error(_("--force-rewind specified but pg_rewind cannot be used"));
-			log_detail("%s", reason.data);
+			log_detail("%s", msg.data);
-			termPQExpBuffer(&reason);
+			termPQExpBuffer(&msg);
 			PQfinish(upstream_conn);
 
 			exit(ERR_BAD_CONFIG);
 		}
-		termPQExpBuffer(&reason);
 
-		initPQExpBuffer(&msg);
 		appendPQExpBuffer(&msg,
 						  _("prerequisites for using pg_rewind are met"));
 
@@ -1808,25 +1835,31 @@ do_node_rejoin(void)
 			log_verbose(LOG_INFO, "%s", msg.data);
 		}
 		termPQExpBuffer(&msg);
-	}
-
-	/*
-	 * Forcibly rewind node if requested (this is mainly for use when this
-	 * action is being executed by "repmgr standby switchover")
-	 */
-	if (runtime_options.force_rewind == true)
-	{
-		int			ret;
-		PQExpBufferData		filebuf;
 
+		/*
+		 * Archive requested configuration files.
+		 *
+		 * In --dry-run mode this acts as a check that the files can be archived, though
+		 * errors will only be logged; any copied files will be deleted and --dry-run
+		 * execution will continue.
+		 */
 		_do_node_archive_config();
 
 		/* execute pg_rewind */
 		initPQExpBuffer(&command);
 
-		appendPQExpBuffer(&command,
+		if (runtime_options.force_rewind_path[0] != '\0')
-						  "%s -D ",
+		{
-						  make_pg_path("pg_rewind"));
+			appendPQExpBuffer(&command,
+							  "%s -D ",
+							  runtime_options.force_rewind_path);
+		}
+		else
+		{
+			appendPQExpBuffer(&command,
+							  "%s -D ",
+							  make_pg_path("pg_rewind"));
+		}
 
 		appendShellString(&command,
 						  config_file_options.data_directory);
@@ -1840,115 +1873,128 @@ do_node_rejoin(void)
 			log_info(_("pg_rewind would now be executed"));
 			log_detail(_("pg_rewind command is:\n  %s"),
 						 command.data);
-
-			PQfinish(upstream_conn);
-			exit(SUCCESS);
 		}
-
+		else
-		log_notice(_("executing pg_rewind"));
-		log_debug("pg_rewind command is:\n  %s",
-				  command.data);
-
-		initPQExpBuffer(&command_output);
-
-		ret = local_command(
-							command.data,
-							&command_output);
-
-		termPQExpBuffer(&command);
-
-		if (ret == false)
 		{
-			log_error(_("unable to execute pg_rewind"));
+			log_notice(_("executing pg_rewind"));
-			log_detail("%s", command_output.data);
+			log_debug("pg_rewind command is:\n  %s",
+					  command.data);
+
+			initPQExpBuffer(&command_output);
+
+			ret = local_command(command.data,
+								&command_output);
+
+			termPQExpBuffer(&command);
+
+			if (ret == false)
+			{
+				log_error(_("unable to execute pg_rewind"));
+				log_detail("%s", command_output.data);
+
+				termPQExpBuffer(&command_output);
+
+				exit(ERR_BAD_CONFIG);
+			}
 
 			termPQExpBuffer(&command_output);
 
-			exit(ERR_BAD_CONFIG);
+			/* Restore any previously archived config files */
-		}
+			_do_node_restore_config();
 
-		termPQExpBuffer(&command_output);
+			initPQExpBuffer(&filebuf);
 
-		/* Restore any previously archived config files */
+			/* remove any recovery.done file copied in by pg_rewind */
-		_do_node_restore_config();
+			appendPQExpBuffer(&filebuf,
-
+							  "%s/recovery.done",
-		initPQExpBuffer(&filebuf);
-
-		/* remove any recovery.done file copied in by pg_rewind */
-		appendPQExpBuffer(&filebuf,
-						  "%s/recovery.done",
-						  config_file_options.data_directory);
-
-		if (stat(filebuf.data, &statbuf) == 0)
-		{
-			log_verbose(LOG_INFO, _("deleting \"recovery.done\""));
-
-			if (unlink(filebuf.data) == -1)
-			{
-				log_warning(_("unable to delete \"%s\""),
-							filebuf.data);
-				log_detail("%s", strerror(errno));
-			}
-		}
-		termPQExpBuffer(&filebuf);
-
-		/* delete any replication slots copied in by pg_rewind */
-		{
-			PQExpBufferData slotdir_path;
-			DIR			  *slotdir;
-			struct dirent *slotdir_ent;
-
-			initPQExpBuffer(&slotdir_path);
-
-			appendPQExpBuffer(&slotdir_path,
-							  "%s/pg_replslot",
 							  config_file_options.data_directory);
 
-			slotdir = opendir(slotdir_path.data);
+			if (stat(filebuf.data, &statbuf) == 0)
-
-			if (slotdir == NULL)
 			{
-				log_warning(_("unable to open replication slot directory \"%s\""),
+				log_verbose(LOG_INFO, _("deleting \"recovery.done\""));
-							slotdir_path.data);
-				log_detail("%s", strerror(errno));
-			}
-			else
-			{
-				while ((slotdir_ent = readdir(slotdir)) != NULL) {
-					struct stat statbuf;
-					PQExpBufferData slotdir_ent_path;
 
-					if(strcmp(slotdir_ent->d_name, ".") == 0 || strcmp(slotdir_ent->d_name, "..") == 0)
+				if (unlink(filebuf.data) == -1)
-						continue;
+				{
-
+					log_warning(_("unable to delete \"%s\""),
-					initPQExpBuffer(&slotdir_ent_path);
+								filebuf.data);
-
+					log_detail("%s", strerror(errno));
-					appendPQExpBuffer(&slotdir_ent_path,
-									  "%s/%s",
-									  slotdir_path.data,
-									  slotdir_ent->d_name);
-
-					if (stat(slotdir_ent_path.data, &statbuf) == 0 && !S_ISDIR(statbuf.st_mode))
-					{
-						termPQExpBuffer(&slotdir_ent_path);
-						continue;
-					}
-
-					log_debug("deleting slot directory \"%s\"", slotdir_ent_path.data);
-					if (rmdir_recursive(slotdir_ent_path.data) != 0 && errno != EEXIST)
-					{
-						log_warning(_("unable to delete replication slot directory \"%s\""), slotdir_ent_path.data);
-						log_detail("%s", strerror(errno));
-						log_hint(_("directory may need to be manually removed"));
-					}
-
-					termPQExpBuffer(&slotdir_ent_path);
 				}
 			}
-			termPQExpBuffer(&slotdir_path);
+			termPQExpBuffer(&filebuf);
+
+			/*
+			 * Delete any replication slots copied in by pg_rewind.
+			 *
+			 * TODO:
+			 *  - from PostgreSQL 11, this will be handled by pg_rewind, so
+			 *    we can skip this step from that version; see commit
+			 *    266b6acb312fc440c1c1a2036aa9da94916beac6
+			 *  - possibly delete contents of various other directories
+			 *    as per the above commit for pre-PostgreSQL 11
+			 */
+			{
+				PQExpBufferData slotdir_path;
+				DIR			  *slotdir;
+				struct dirent *slotdir_ent;
+
+				initPQExpBuffer(&slotdir_path);
+
+				appendPQExpBuffer(&slotdir_path,
+								  "%s/pg_replslot",
+								  config_file_options.data_directory);
+
+				slotdir = opendir(slotdir_path.data);
+
+				if (slotdir == NULL)
+				{
+					log_warning(_("unable to open replication slot directory \"%s\""),
+								slotdir_path.data);
+					log_detail("%s", strerror(errno));
+				}
+				else
+				{
+					while ((slotdir_ent = readdir(slotdir)) != NULL) {
+						struct stat statbuf;
+						PQExpBufferData slotdir_ent_path;
+
+						if(strcmp(slotdir_ent->d_name, ".") == 0 || strcmp(slotdir_ent->d_name, "..") == 0)
+							continue;
+
+						initPQExpBuffer(&slotdir_ent_path);
+
+						appendPQExpBuffer(&slotdir_ent_path,
+										  "%s/%s",
+										  slotdir_path.data,
+										  slotdir_ent->d_name);
+
+						if (stat(slotdir_ent_path.data, &statbuf) == 0 && !S_ISDIR(statbuf.st_mode))
+						{
+							termPQExpBuffer(&slotdir_ent_path);
+							continue;
+						}
+
+						log_debug("deleting slot directory \"%s\"", slotdir_ent_path.data);
+						if (rmdir_recursive(slotdir_ent_path.data) != 0 && errno != EEXIST)
+						{
+							log_warning(_("unable to delete replication slot directory \"%s\""), slotdir_ent_path.data);
+							log_detail("%s", strerror(errno));
+							log_hint(_("directory may need to be manually removed"));
+						}
+
+						termPQExpBuffer(&slotdir_ent_path);
+					}
+				}
+				termPQExpBuffer(&slotdir_path);
+			}
 		}
 	}
 
+	if (runtime_options.dry_run == true)
+	{
+		log_info(_("prerequisites for executing NODE REJOIN are met"));
+		exit(SUCCESS);
+	}
+
 	initPQExpBuffer(&follow_output);
 
 	success = do_standby_follow_internal(upstream_conn,
@@ -1959,7 +2005,9 @@ do_node_rejoin(void)
 	if (success == false)
 	{
 		log_notice(_("NODE REJOIN failed"));
-		log_detail("%s", follow_output.data);
+
+		if (strlen(follow_output.data))
+			log_detail("%s", follow_output.data);
 
 		create_event_notification(upstream_conn,
 								  &config_file_options,
@@ -1975,22 +2023,99 @@ do_node_rejoin(void)
 	}
 
 	/*
-	 * XXX add checks that node actually started and connected to primary,
+	 * Actively check that node actually started and connected to primary,
-	 * if not exit with ERR_REJOIN_FAIL
+	 * if not exit with ERR_REJOIN_FAIL.
+	 *
+	 * This check can be overridden with -W/--no-wait, in which case a one-time
+	 * check will be carried out.
 	 */
+	if (runtime_options.no_wait == false)
+	{
+		int i;
 
-	create_event_notification(upstream_conn,
+		for (i = 0; i < config_file_options.standby_reconnect_timeout; i++)
-							  &config_file_options,
+		{
-							  config_file_options.node_id,
+			if (is_server_available(config_file_options.conninfo))
-							  "node_rejoin",
+			{
-							  success,
+				log_verbose(LOG_INFO, _("demoted primary is pingable"));
-							  follow_output.data);
+				break;
+			}
 
-	PQfinish(upstream_conn);
+			if (i % 5 == 0)
+			{
+				log_verbose(LOG_INFO, _("waiting for node %i to respond to pings; %i of max %i attempts"),
+							config_file_options.node_id,
+							i + 1, config_file_options.standby_reconnect_timeout);
+			}
+			else
+			{
+				log_debug("sleeping 1 second waiting for node %i to respond to pings; %i of max %i attempts",
+						  config_file_options.node_id,
+						  i + 1, config_file_options.standby_reconnect_timeout);
+			}
 
-	log_notice(_("NODE REJOIN successful"));
+			sleep(1);
-	log_detail("%s", follow_output.data);
+		}
 
+		for (;  i < config_file_options.standby_reconnect_timeout; i++)
+		{
+			success = is_downstream_node_attached(upstream_conn, config_file_options.node_name);
+
+			if (success == true)
+			{
+				log_verbose(LOG_INFO, _("node %i has attached to its upstream node"),
+							config_file_options.node_id);
+				break;
+			}
+
+			if (i % 5 == 0)
+			{
+				log_info(_("waiting for node %i to connect to new primary; %i of max %i attempts"),
+						 config_file_options.node_id,
+						 i + 1, config_file_options.standby_reconnect_timeout);
+			}
+			else
+			{
+				log_debug("sleeping 1 second waiting for node %i to connect to new primary; %i of max %i attempts",
+						  config_file_options.node_id,
+						  i + 1, config_file_options.standby_reconnect_timeout);
+			}
+
+			sleep(1);
+		}
+
+		create_event_notification(upstream_conn,
+								  &config_file_options,
+								  config_file_options.node_id,
+								  "node_rejoin",
+								  success,
+								  follow_output.data);
+
+		if (success == false)
+		{
+			termPQExpBuffer(&follow_output);
+			log_notice(_("NODE REJOIN failed"));
+			exit(ERR_REJOIN_FAIL);
+		}
+	}
+	else
+	{
+		success = is_downstream_node_attached(upstream_conn, config_file_options.node_name);
+	}
+
+
+	if (success == true)
+	{
+		log_notice(_("NODE REJOIN successful"));
+		log_detail("%s", follow_output.data);
+	}
+	else
+	{
+		/*
+		 * if we reach here, no record found in upstream node's pg_stat_replication */
+		log_notice(_("NODE REJOIN has completed but node is not yet reattached to upstream"));
+		log_hint(_("you will need to manually check the node's replication status"));
+	}
 	termPQExpBuffer(&follow_output);
 
 	return;
@@ -2042,6 +2167,11 @@ _do_node_archive_config(void)
 			termPQExpBuffer(&archive_dir);
 			exit(ERR_BAD_CONFIG);
 		}
+
+		if (runtime_options.dry_run == true)
+		{
+			log_verbose(LOG_INFO, "temporary archive directory \"%s\" created", archive_dir.data);
+		}
 	}
 	else if (!S_ISDIR(statbuf.st_mode))
 	{
@@ -2066,8 +2196,8 @@ _do_node_archive_config(void)
 	{
 
 		/*
-		 * attempt to remove any existing files in the directory TODO: collate
+		 * attempt to remove any existing files in the directory
-		 * problem files into list
+		 * TODO: collate problem files into list
 		 */
 		while ((arcdir_ent = readdir(arcdir)) != NULL)
 		{
@@ -2143,7 +2273,11 @@ _do_node_archive_config(void)
 
 		if (i < config_file_len)
 		{
-			strncpy(filenamebuf, runtime_options.config_files + i, config_file_len - i);
+			int			filename_len = config_file_len - i;
+
+			strncpy(filenamebuf, runtime_options.config_files + i, filename_len);
+
+			filenamebuf[filename_len] = '\0';
 
 			initPQExpBuffer(&pathbuf);
 			appendPQExpBuffer(&pathbuf,
@@ -2221,7 +2355,7 @@ _do_node_archive_config(void)
 		}
 		else
 		{
-			log_verbose(LOG_INFO, "directory \"%s\" deleted", archive_dir.data);
+			log_verbose(LOG_INFO, "temporary archive directory \"%s\" deleted", archive_dir.data);
 		}
 	}
 
@@ -2430,15 +2564,15 @@ do_node_help(void)
 	puts("");
 	printf(_("  Configuration file required, runs on local node only.\n"));
 	puts("");
-	printf(_("    --csv                 emit output as CSV\n"));
+	printf(_("    --csv                   emit output as CSV\n"));
-	printf(_("    --nagios              emit output in Nagios format (individual status output only)\n"));
+	printf(_("    --nagios                emit output in Nagios format (individual status output only)\n"));
 	puts("");
 	printf(_("  Following options check an individual status:\n"));
-	printf(_("    --archive-ready       number of WAL files ready for archiving\n"));
+	printf(_("    --archive-ready         number of WAL files ready for archiving\n"));
-	printf(_("    --downstream          whether all downstream nodes are connected\n"));
+	printf(_("    --downstream            whether all downstream nodes are connected\n"));
-	printf(_("    --replication-lag     replication lag in seconds (standbys only)\n"));
+	printf(_("    --replication-lag       replication lag in seconds (standbys only)\n"));
-	printf(_("    --role                check node has expected role\n"));
+	printf(_("    --role                  check node has expected role\n"));
-	printf(_("    --slots               check for inactive replication slots\n"));
+	printf(_("    --slots                 check for inactive replication slots\n"));
 
 	puts("");
 
@@ -2448,13 +2582,16 @@ do_node_help(void)
 	puts("");
 	printf(_("  Configuration file required, runs on local node only.\n"));
 	puts("");
-	printf(_("    --dry-run             check that the prerequisites are met for rejoining the node\n" \
+	printf(_("    --dry-run               check that the prerequisites are met for rejoining the node\n" \
-			 "                          (including usability of \"pg_rewind\" if requested)\n"));
+			 "                              (including usability of \"pg_rewind\" if requested)\n"));
-	printf(_("    --force-rewind        execute \"pg_rewind\" if necessary\n"));
+	printf(_("    --force-rewind[=VALUE]  execute \"pg_rewind\" if necessary\n"));
-	printf(_("    --config-files        comma-separated list of configuration files to retain\n" \
+	printf(_("                              (9.3 and 9.4 - provide full \"pg_rewind\" path)\n"));
-			 "                          after executing \"pg_rewind\"\n"));
+
-	printf(_("    --config-archive-dir  directory to temporarily store retained configuration files\n" \
+	printf(_("    --config-files          comma-separated list of configuration files to retain\n" \
-			 "                          (default: /tmp)\n"));
+			 "                            after executing \"pg_rewind\"\n"));
+	printf(_("    --config-archive-dir    directory to temporarily store retained configuration files\n" \
+			 "                              (default: /tmp)\n"));
+	printf(_("    -W/--no-wait            don't wait for the node to rejoin cluster\n"));
 	puts("");
 
 	printf(_("NODE SERVICE\n"));

repmgr-action-witness.c

@@ -65,7 +65,7 @@ do_witness_register(void)
 	if (recovery_type == RECTYPE_STANDBY)
 	{
 		log_error(_("provided node is a standby"));
-		log_error(_("a witness node must run on an independent primary server"));
+		log_hint(_("a witness node must run on an independent primary server"));
 
 		PQfinish(witness_conn);
 
@@ -86,6 +86,7 @@ do_witness_register(void)
 
 	/* connect to primary with provided parameters */
 	log_info(_("connecting to primary node"));
+
 	/*
 	 * Extract the repmgr user and database names from the conninfo string
 	 * provided in repmgr.conf
@@ -135,8 +136,11 @@ do_witness_register(void)
 		exit(ERR_BAD_CONFIG);
 	}
 
-	/* XXX sanity check witness node is not part of main cluster */
+	/*
-
+	 * TODO: sanity check witness node is not part of main cluster; we could
+	 * add a random application_name to the respective connections,
+	 * and do a simple check of pg_stat_activity
+	 */
 
 	/* create repmgr extension, if does not exist */
 	if (runtime_options.dry_run == false &&  !create_repmgr_extension(witness_conn))
@@ -182,7 +186,6 @@ do_witness_register(void)
 			log_error(_("witness node is already registered"));
 			log_hint(_("use option -F/--force to reregister the node"));
 
-
 			PQfinish(witness_conn);
 			PQfinish(primary_conn);
 
@@ -190,8 +193,26 @@ do_witness_register(void)
 		}
 	}
 
+	/*
+	 * Check that an active node with the same node_name doesn't exist already
+	 */
 
-	// XXX check other node with same name does not exist
+	record_status = get_node_record_by_name(primary_conn,
+											config_file_options.node_name,
+											&node_record);
+
+
+	if (record_status == RECORD_FOUND)
+	{
+		if (node_record.active == true && node_record.node_id != config_file_options.node_id)
+		{
+			log_error(_("node %i exists already with node_name \"%s\""),
+					  node_record.node_id,
+					  config_file_options.node_name);
+			PQfinish(primary_conn);
+			exit(ERR_BAD_CONFIG);
+		}
+	}
 
 	/*
 	 * if repmgr.nodes contains entries, delete if -F/--force provided,
@@ -222,6 +243,7 @@ do_witness_register(void)
 		PQfinish(witness_conn);
 		exit(SUCCESS);
 	}
+
 	/* create record on primary */
 
 	/*

repmgr-client-global.h

@@ -42,6 +42,7 @@ typedef struct
 	bool		force;
 	char		pg_bindir[MAXLEN];	/* overrides setting in repmgr.conf */
 	bool		wait;
+	bool		no_wait;
 
 	/* logging options */
 	char		log_level[MAXLEN];	/* overrides setting in repmgr.conf */
@@ -80,6 +81,7 @@ typedef struct
 	char		replication_user[MAXLEN];
 	char		upstream_conninfo[MAXLEN];
 	bool		without_barman;
+	bool		recovery_conf_only;
 
 	/* "standby clone"/"standby follow" options */
 	int			upstream_node_id;
@@ -91,7 +93,8 @@ typedef struct
 
 	/* "standby switchover" options */
 	bool		always_promote;
-	bool		force_rewind;
+	bool		force_rewind_used;
+	char		force_rewind_path[MAXPGPATH];
 	bool		siblings_follow;
 
 	/* "node status" options */
@@ -132,26 +135,26 @@ typedef struct
 		/* configuration metadata */ \
 		false, false, false, false,	\
 		/* general configuration options */	\
-		"", false, false, "", false,	\
+		"", false, false, "", false, false,	\
 		/* logging options */ \
 		"", false, false, false, \
 		/* output options */ \
 		false, false, false,  \
 		/* database connection options */ \
-		"", "", "",	"",				  \
+		"", "", "",	"", \
 		/* other connection options */ \
-		"",	"",  \
+		"",	"", \
 		/* general node options */ \
 		UNKNOWN_NODE_ID, "", "", UNKNOWN_NODE_ID, \
 		/* "standby clone" options */ \
 		false, CONFIG_FILE_SAMEPATH, false, false, false, "", "", "", \
-		false,  \
+		false, false, \
 		/* "standby clone"/"standby follow" options */ \
 		NO_UPSTREAM_NODE, \
 		/* "standby register" options */ \
 		false, 0, DEFAULT_WAIT_START,   \
 		/* "standby switchover" options */ \
-		false, false, false, \
+		false, false, "", false,		   \
 		/* "node status" options */ \
 		false, \
 		/* "node check" options */ \
@@ -164,7 +167,7 @@ typedef struct
 		false, "", CLUSTER_EVENT_LIMIT,	\
 		/* "cluster cleanup" options */ \
 		0, \
-		/* Following options for internal use */ \
+		/* following options for internal use */ \
 		"/tmp", OM_TEXT	\
 }
 
@@ -207,6 +210,7 @@ extern void check_93_config(void);
 extern bool create_repmgr_extension(PGconn *conn);
 extern int	test_ssh_connection(char *host, char *remote_user);
 extern bool local_command(const char *command, PQExpBufferData *outputbuf);
+extern bool local_command_simple(const char *command, PQExpBufferData *outputbuf);
 
 extern standy_clone_mode get_standby_clone_mode(void);
 
@@ -227,7 +231,9 @@ extern void print_help_header(void);
 /* server control functions */
 extern void get_server_action(t_server_action action, char *script, char *data_dir);
 extern bool data_dir_required_for_action(t_server_action action);
+extern void get_node_config_directory(char *config_dir_buf);
 extern void get_node_data_directory(char *data_dir_buf);
 extern void init_node_record(t_node_info *node_record);
+extern bool can_use_pg_rewind(PGconn *conn, const char *data_directory, PQExpBufferData *reason);
 
 #endif							/* _REPMGR_CLIENT_GLOBAL_H_ */

repmgr-client.c

@@ -53,6 +53,7 @@
 
 #include "repmgr.h"
 #include "compat.h"
+#include "controldata.h"
 #include "repmgr-client.h"
 #include "repmgr-client-global.h"
 #include "repmgr-action-primary.h"
@@ -90,6 +91,7 @@ t_node_info target_node_info = T_NODE_INFO_INITIALIZER;
 static ItemList cli_errors = {NULL, NULL};
 static ItemList cli_warnings = {NULL, NULL};
 
+static bool _local_command(const char *command, PQExpBufferData *outputbuf, bool simple);
 
 int
 main(int argc, char **argv)
@@ -176,7 +178,7 @@ main(int argc, char **argv)
 		strncpy(runtime_options.username, pw->pw_name, MAXLEN);
 	}
 
-	while ((c = getopt_long(argc, argv, "?Vb:f:FWd:h:p:U:R:S:D:ckL:tvC:", long_options,
+	while ((c = getopt_long(argc, argv, "?Vb:f:FwWd:h:p:U:R:S:D:ck:L:tvC:", long_options,
 							&optindex)) != -1)
 	{
 		/*
@@ -241,11 +243,16 @@ main(int argc, char **argv)
 				strncpy(runtime_options.replication_user, optarg, MAXLEN);
 				break;
 
-				/* -W/--wait */
+				/* -w/--wait */
-			case 'W':
+			case 'w':
 				runtime_options.wait = true;
 				break;
 
+				/* -W/--no-wait */
+			case 'W':
+				runtime_options.no_wait = true;
+				break;
+
 				/*----------------------------
 				 * database connection options
 				 *----------------------------
@@ -388,6 +395,11 @@ main(int argc, char **argv)
 				runtime_options.without_barman = true;
 				break;
 
+			case OPT_RECOVERY_CONF_ONLY:
+				runtime_options.recovery_conf_only = true;
+				break;
+
+
 				/*---------------------------
 				 * "standby register" options
 				 *---------------------------
@@ -415,7 +427,13 @@ main(int argc, char **argv)
 				break;
 
 			case OPT_FORCE_REWIND:
-				runtime_options.force_rewind = true;
+				runtime_options.force_rewind_used = true;
+
+				if (optarg != NULL)
+				{
+					strncpy(runtime_options.force_rewind_path, optarg, MAXPGPATH);
+				}
+
 				break;
 
 			case OPT_SIBLINGS_FOLLOW:
@@ -616,7 +634,7 @@ main(int argc, char **argv)
 	 * If -d/--dbname appears to be a conninfo string, validate by attempting
 	 * to parse it (and if successful, store the parsed parameters)
 	 */
-	if (runtime_options.dbname)
+	if (runtime_options.dbname[0])
 	{
 		if (strncmp(runtime_options.dbname, "postgresql://", 13) == 0 ||
 			strncmp(runtime_options.dbname, "postgres://", 11) == 0 ||
@@ -992,32 +1010,10 @@ main(int argc, char **argv)
 		runtime_options.output_mode = OM_OPTFORMAT;
 	}
 
-
-
-	/* check for conflicts between runtime options and configuration file */
-	/* ================================================================== */
-
-	if (action == STANDBY_CLONE)
-	{
-		standy_clone_mode mode = get_standby_clone_mode();
-
-		if (mode == barman && runtime_options.without_barman == false
-			&& config_file_options.use_replication_slots == true)
-		{
-			log_error(_("STANDBY CLONE in Barman mode is incompatible with configuration option \"use_replication_slots\""));
-			log_hint(_("set \"use_replication_slots\" to \"no\" in repmgr.conf, or use --without-barman to clone directly from the upstream server"));
-			exit(ERR_BAD_CONFIG);
-		}
-	}
-
-
 	/*
 	 * Check for configuration file items which can be overriden by runtime
 	 * options
-	 */
+	 * =====================================================================
-
-	/*
-	 * ============================================================================
 	 */
 
 	/*
@@ -1071,6 +1067,17 @@ main(int argc, char **argv)
 	if (runtime_options.terse)
 		logger_set_terse();
 
+	/*
+	 * If --dry-run specified, ensure log_level is at least LOG_INFO, regardless
+	 * of what's in the configuration file or -L/--log-level paremeter, otherwise
+	 * some or output might not be displayed.
+	 */
+	if (runtime_options.dry_run == true)
+	{
+		logger_set_min_level(LOG_INFO);
+	}
+
+
 	/*
 	 * Node configuration information is not needed for all actions, with
 	 * STANDBY CLONE being the main exception.
@@ -1331,6 +1338,15 @@ check_cli_parameters(const int action)
 										 _("--no-upstream-connection only effective in Barman mode"));
 					}
 				}
+
+				if (strlen(config_file_options.config_directory))
+				{
+					if (runtime_options.copy_external_config_files == false)
+					{
+						item_list_append(&cli_warnings,
+										 _("\"config_directory\" set in repmgr.conf, but --copy-external-config-files not provided"));
+					}
+				}
 			}
 			break;
 
@@ -1495,6 +1511,39 @@ check_cli_parameters(const int action)
 		}
 	}
 
+	if (runtime_options.replication_user[0])
+	{
+		switch (action)
+		{
+			case PRIMARY_REGISTER:
+			case STANDBY_REGISTER:
+			case STANDBY_CLONE:
+				break;
+
+			case STANDBY_FOLLOW:
+				item_list_append_format(&cli_warnings,
+										_("--replication-user ignored when executing %s"),
+										action_name(action));
+			default:
+				item_list_append_format(&cli_warnings,
+										_("--replication-user not required when executing %s"),
+										action_name(action));
+		}
+	}
+
+	if (runtime_options.recovery_conf_only == true)
+	{
+		switch (action)
+		{
+			case STANDBY_CLONE:
+				break;
+			default:
+				item_list_append_format(&cli_warnings,
+										_("--create-recovery-conf will be ignored when executing %s"),
+										action_name(action));
+		}
+	}
+
 	if (runtime_options.event[0])
 	{
 		switch (action)
@@ -1508,25 +1557,6 @@ check_cli_parameters(const int action)
 		}
 	}
 
-	if (runtime_options.replication_user[0])
-	{
-		switch (action)
-		{
-			case PRIMARY_REGISTER:
-			case STANDBY_REGISTER:
-				break;
-			case STANDBY_CLONE:
-			case STANDBY_FOLLOW:
-				item_list_append_format(&cli_warnings,
-										_("--replication-user ignored when executing %s)"),
-										action_name(action));
-			default:
-				item_list_append_format(&cli_warnings,
-										_("--replication-user not required when executing %s"),
-										action_name(action));
-		}
-	}
-
 	if (runtime_options.limit_provided)
 	{
 		switch (action)
@@ -1565,6 +1595,41 @@ check_cli_parameters(const int action)
 		}
 	}
 
+	/* --wait/--no-wait */
+
+	if (runtime_options.wait == true && runtime_options.no_wait == true)
+	{
+		item_list_append_format(&cli_errors,
+								_("both --wait and --no-wait options provided"));
+	}
+	else
+	{
+		if (runtime_options.wait)
+		{
+			switch (action)
+			{
+				case STANDBY_FOLLOW:
+					break;
+				default:
+					item_list_append_format(&cli_warnings,
+											_("--wait will be ignored when executing %s"),
+											action_name(action));
+			}
+		}
+		else if (runtime_options.wait)
+		{
+			switch (action)
+			{
+				case NODE_REJOIN:
+					break;
+				default:
+					item_list_append_format(&cli_warnings,
+											_("--no-wait will be ignored when executing %s"),
+											action_name(action));
+			}
+		}
+	}
+
 	/* repmgr node service --action */
 	if (runtime_options.action[0] != '\0')
 	{
@@ -1606,7 +1671,7 @@ check_cli_parameters(const int action)
 		}
 	}
 
-	if (runtime_options.force_rewind == true)
+	if (runtime_options.force_rewind_used == true)
 	{
 		switch (action)
 		{
@@ -1777,10 +1842,11 @@ do_help(void)
 
 	printf(_("Usage:\n"));
 	printf(_("    %s [OPTIONS] primary {register|unregister}\n"), progname());
-	printf(_("    %s [OPTIONS] standby {register|unregister|clone|promote|follow}\n"), progname());
+	printf(_("    %s [OPTIONS] standby {register|unregister|clone|promote|follow|switchover}\n"), progname());
 	printf(_("    %s [OPTIONS] bdr     {register|unregister}\n"), progname());
-	printf(_("    %s [OPTIONS] node    status\n"), progname());
+	printf(_("    %s [OPTIONS] node    {status|check|rejoin|service}\n"), progname());
 	printf(_("    %s [OPTIONS] cluster {show|event|matrix|crosscheck}\n"), progname());
+	printf(_("    %s [OPTIONS] witness {register|unregister}\n"), progname());
 
 	puts("");
 
@@ -2097,12 +2163,28 @@ test_ssh_connection(char *host, char *remote_user)
 }
 
 
+
+
 /*
  * Execute a command locally. "outputbuf" should either be an
  * initialised PQexpbuffer, or NULL
  */
 bool
 local_command(const char *command, PQExpBufferData *outputbuf)
+{
+	return _local_command(command, outputbuf, false);
+}
+
+
+bool
+local_command_simple(const char *command, PQExpBufferData *outputbuf)
+{
+	return _local_command(command, outputbuf, true);
+}
+
+
+static bool
+_local_command(const char *command, PQExpBufferData *outputbuf, bool simple)
 {
 	FILE	   *fp = NULL;
 	char		output[MAXLEN];
@@ -2129,7 +2211,8 @@ local_command(const char *command, PQExpBufferData *outputbuf)
 	while (fgets(output, MAXLEN, fp) != NULL)
 	{
 		appendPQExpBuffer(outputbuf, "%s", output);
-		if (!feof(fp))
+
+		if (!feof(fp) && simple == false)
 		{
 			break;
 		}
@@ -2151,10 +2234,19 @@ local_command(const char *command, PQExpBufferData *outputbuf)
 }
 
 
+/*
+ * get_superuser_connection()
+ *
+ * Check if provided connection "conn" is a superuser connection, if not attempt to
+ * make a superuser connection "superuser_conn" with the provided --superuser parameter.
+ *
+ * "privileged_conn" is set to whichever connection is the superuser connection.
+ */
 void
 get_superuser_connection(PGconn **conn, PGconn **superuser_conn, PGconn **privileged_conn)
 {
 	t_connection_user userinfo = T_CONNECTION_USER_INITIALIZER;
+	t_conninfo_param_list conninfo_params = T_CONNINFO_PARAM_LIST_INITIALIZER;
 	bool		is_superuser = false;
 
 	/* this should never happen */
@@ -2163,6 +2255,7 @@ get_superuser_connection(PGconn **conn, PGconn **superuser_conn, PGconn **privil
 		log_error(_("no database connection available"));
 		exit(ERR_INTERNAL);
 	}
+
 	is_superuser = is_superuser_connection(*conn, &userinfo);
 
 	if (is_superuser == true)
@@ -2180,9 +2273,11 @@ get_superuser_connection(PGconn **conn, PGconn **superuser_conn, PGconn **privil
 		exit(ERR_BAD_CONFIG);
 	}
 
-	*superuser_conn = establish_db_connection_as_user(config_file_options.conninfo,
+	initialize_conninfo_params(&conninfo_params, false);
-													  runtime_options.superuser,
+	conn_to_param_list(*conn, &conninfo_params);
-													  false);
+	param_set(&conninfo_params, "user", runtime_options.superuser);
+
+	*superuser_conn = establish_db_connection_by_params(&conninfo_params, false);
 
 	if (PQstatus(*superuser_conn) != CONNECTION_OK)
 	{
@@ -2202,6 +2297,8 @@ get_superuser_connection(PGconn **conn, PGconn **superuser_conn, PGconn **privil
 		exit(ERR_BAD_CONFIG);
 	}
 
+	log_debug("established superuser connection as \"%s\"", runtime_options.superuser);
+
 	*privileged_conn = *superuser_conn;
 	return;
 }
@@ -2343,9 +2440,6 @@ copy_remote_files(char *host, char *remote_user, char *remote_path,
 }
 
 
-
-
-
 /*
  * Execute a command via ssh on the remote host.
  *
@@ -2411,7 +2505,7 @@ remote_command(const char *host, const char *user, const char *command, PQExpBuf
 	if (outputbuf != NULL)
 	{
 		if (strlen(outputbuf->data))
-			log_verbose(LOG_DEBUG, "remote_command(): output returned was:\n  %s", outputbuf->data);
+			log_verbose(LOG_DEBUG, "remote_command(): output returned was:\n%s", outputbuf->data);
 		else
 			log_verbose(LOG_DEBUG, "remote_command(): no output returned");
 	}
@@ -2660,6 +2754,33 @@ data_dir_required_for_action(t_server_action action)
 }
 
 
+/*
+ * Copy the location of the configuration file directory into the
+ * provided buffer; if "config_directory" provided, use that, otherwise
+ * default to the data directory.
+ *
+ * This is primarily intended for use with "pg_ctl" (which itself shouldn't
+ * be used outside of development environments).
+ */
+void
+get_node_config_directory(char *config_dir_buf)
+{
+	if (config_file_options.config_directory[0] != '\0')
+	{
+		strncpy(config_dir_buf, config_file_options.config_directory, MAXPGPATH);
+		return;
+	}
+
+	if (config_file_options.data_directory[0] != '\0')
+	{
+		strncpy(config_dir_buf, config_file_options.data_directory, MAXPGPATH);
+		return;
+	}
+
+	return;
+}
+
+
 void
 get_node_data_directory(char *data_dir_buf)
 {
@@ -2707,7 +2828,7 @@ init_node_record(t_node_info *node_record)
 
 	if (config_file_options.replication_user[0] != '\0')
 	{
-		/* replication user explicitly provided */
+		/* replication user explicitly provided in configuration file */
 		strncpy(node_record->repluser, config_file_options.replication_user, NAMEDATALEN);
 	}
 	else
@@ -2724,3 +2845,77 @@ init_node_record(t_node_info *node_record)
 		create_slot_name(node_record->slot_name, config_file_options.node_id);
 	}
 }
+
+
+bool
+can_use_pg_rewind(PGconn *conn, const char *data_directory, PQExpBufferData *reason)
+{
+	bool		can_use = true;
+	int			server_version_num = get_server_version(conn, NULL);
+
+	/* wal_log_hints not available in 9.3, so just determine if data checksums enabled */
+	if (server_version_num < 90400)
+	{
+		int			data_checksum_version = get_data_checksum_version(data_directory);
+
+		if (data_checksum_version < 0)
+		{
+			appendPQExpBuffer(reason,
+							  _("unable to determine data checksum version"));
+			can_use = false;
+		}
+		else if (data_checksum_version == 0)
+		{
+			appendPQExpBuffer(reason,
+							  _("this cluster was initialised without data checksums"));
+			can_use = false;
+		}
+
+		return can_use;
+	}
+
+	/* "full_page_writes" must be on in any case */
+	if (guc_set(conn, "full_page_writes", "=", "off"))
+	{
+		if (can_use == false)
+			appendPQExpBuffer(reason, "; ");
+
+		appendPQExpBuffer(reason,
+						  _("\"full_page_writes\" must be set to \"on\""));
+
+		can_use = false;
+	}
+
+	/*
+	 * "wal_log_hints" off - are data checksums available? Note: we're
+	 * checking the local pg_control file here as the value will be the same
+	 * throughout the cluster and saves a round-trip to the demotion
+	 * candidate.
+	 */
+	if (guc_set(conn, "wal_log_hints", "=", "on") == false)
+	{
+		int			data_checksum_version = get_data_checksum_version(data_directory);
+
+		if (data_checksum_version < 0)
+		{
+			if (can_use == false)
+				appendPQExpBuffer(reason, "; ");
+
+			appendPQExpBuffer(reason,
+							  _("\"wal_log_hints\" is set to \"off\" but unable to determine data checksum version"));
+			can_use = false;
+		}
+		else if (data_checksum_version == 0)
+		{
+			if (can_use == false)
+				appendPQExpBuffer(reason, "; ");
+
+			appendPQExpBuffer(reason,
+							  _("\"wal_log_hints\" is set to \"off\" and data checksums are disabled"));
+
+			can_use = false;
+		}
+	}
+
+	return can_use;
+}

repmgr-client.h

@@ -85,6 +85,8 @@
 #define OPT_WAIT_START                     1036
 #define OPT_REPL_CONN                      1037
 #define OPT_REMOTE_NODE_ID                 1038
+#define OPT_RECOVERY_CONF_ONLY             1039
+#define OPT_NO_WAIT                        1040
 
 /* deprecated since 3.3 */
 #define OPT_DATA_DIR						999
@@ -103,7 +105,8 @@ static struct option long_options[] =
 	{"dry-run", no_argument, NULL, OPT_DRY_RUN},
 	{"force", no_argument, NULL, 'F'},
 	{"pg_bindir", required_argument, NULL, 'b'},
-	{"wait", no_argument, NULL, 'W'},
+	{"wait", no_argument, NULL, 'w'},
+	{"no-wait", no_argument, NULL, 'W'},
 
 /* connection options */
 	{"dbname", required_argument, NULL, 'd'},
@@ -139,6 +142,7 @@ static struct option long_options[] =
 	{"upstream-conninfo", required_argument, NULL, OPT_UPSTREAM_CONNINFO},
 	{"upstream-node-id", required_argument, NULL, OPT_UPSTREAM_NODE_ID},
 	{"without-barman", no_argument, NULL, OPT_WITHOUT_BARMAN},
+	{"recovery-conf-only", no_argument, NULL, OPT_RECOVERY_CONF_ONLY},
 
 /* "standby register" options */
 	{"wait-start", required_argument, NULL, OPT_WAIT_START},
@@ -166,7 +170,7 @@ static struct option long_options[] =
 /* "node rejoin" options */
 	{"config-files", required_argument, NULL, OPT_CONFIG_FILES},
     {"config-archive-dir", required_argument, NULL, OPT_CONFIG_ARCHIVE_DIR},
-	{"force-rewind", no_argument, NULL, OPT_FORCE_REWIND},
+	{"force-rewind", optional_argument, NULL, OPT_FORCE_REWIND},
 
 /* "node service" options */
 	{"action", required_argument, NULL, OPT_ACTION},

repmgr.conf.sample

@@ -40,18 +40,28 @@
 				 # is not running and there's no other way of determining
 				 # the data directory.
 
-#replication_user='repmgr'	 # User to make replication connections with, if not set defaults
-				 # to the user defined in "conninfo".
 
 # =============================================================================
 
 # Optional configuration items
 # =============================================================================
 
+
+#------------------------------------------------------------------------------
+# Server settings
+#------------------------------------------------------------------------------
+
+#config_directory=''		 # If configuration files are located outside the data
+				 # directory, specify the directory where the main
+				 # postgresql.conf file is located.
+
 #------------------------------------------------------------------------------
 # Replication settings
 #------------------------------------------------------------------------------
 
+#replication_user='repmgr'	 # User to make replication connections with, if not set defaults
+				 # to the user defined in "conninfo".
+
 #replication_type=physical	 # Must be one of 'physical' or 'bdr'.
 
 #location=default		 # arbitrary string defining the location of the node; this
@@ -65,9 +75,6 @@
 				 # at least the number of standbys which will connect
 				 # to the primary.
 
-#recovery_min_apply_delay=	 # If provided, "recovery_min_apply_delay" in recovery.conf
-				 # will be set to this value.
-
 #------------------------------------------------------------------------------
 # Witness server settings
 #------------------------------------------------------------------------------
@@ -91,7 +98,7 @@
 #log_facility=STDERR		 # Logging facility: possible values are STDERR, or for
 				 # syslog integration, one of LOCAL0, LOCAL1, ..., LOCAL7, USER
 
-#log_file=''			 # stderr can be redirected to an arbitrary file:
+#log_file=''			 # stderr can be redirected to an arbitrary file
 #log_status_interval=300	 # interval (in seconds) for repmgrd to log a status message
 
 
@@ -161,7 +168,7 @@ ssh_options='-q -o ConnectTimeout=10'	# Options to append to "ssh"
 
 
 #------------------------------------------------------------------------------
-# Standby clone settings
+# "standby clone" settings
 #------------------------------------------------------------------------------
 #
 # These settings apply when cloning a standby ("repmgr standby clone").
@@ -175,8 +182,29 @@ ssh_options='-q -o ConnectTimeout=10'	# Options to append to "ssh"
 					# file system location to another. This
 					# parameter can be provided multiple times.
 
-#restore_command=''			# This will be placed in the recovery.conf
+#restore_command=''			# This will be placed in the recovery.conf file generated
-					# file generated by repmgr
+                                        # by repmgr.
+
+#archive_cleanup_command=''		# This will be placed in the recovery.conf file generated
+                                        # by repmgr. Note we recommend using Barman for managing
+                                        # WAL archives (see: https://www.pgbarman.org )
+
+#recovery_min_apply_delay=		# If provided, "recovery_min_apply_delay" in recovery.conf
+					# will be set to this value (PostgreSQL 9.4 and later).
+
+
+#------------------------------------------------------------------------------
+# "standby promote" settings
+#------------------------------------------------------------------------------
+
+# These settings apply when instructing a standby to promote itself to the
+# new primary ("repmgr standby promote").
+
+#promote_check_timeout=60		# The length of time (in seconds) to wait
+					# for the new primary to finish promoting
+#promote_check_interval=1		# The interval (in seconds) to check whether
+					# the new primary has finished promoting
+
 
 #------------------------------------------------------------------------------
 # Standby follow settings
@@ -185,8 +213,10 @@ ssh_options='-q -o ConnectTimeout=10'	# Options to append to "ssh"
 # These settings apply when instructing a standby to follow the new primary
 # ("repmgr standby follow").
 
-#primary_follow_timeout=60		# The length of time (in seconds) to wait
+#primary_follow_timeout=60		# The max length of time (in seconds) to wait
 					# for the new primary to become available
+#standby_follow_timeout=15		# The max length of time (in seconds) to wait
+					# for the standby to connect to the primary
 
 
 #------------------------------------------------------------------------------
@@ -235,6 +265,8 @@ ssh_options='-q -o ConnectTimeout=10'	# Options to append to "ssh"
 #primary_notification_timeout=60	# Interval (in seconds) which repmgrd on a standby
 					# will wait for a notification from the new primary,
 					# before falling back to degraded monitoring
+#standby_reconnect_timeout=60	# Interval (in seconds) which repmgrd on a standby will wait
+					# to reconnect to the local node after executing "follow_command"
 
 #monitoring_history=no                  # Whether to write monitoring data to the "montoring_history" table
 #monitor_interval_secs=2                # Interval (in seconds) at which to write monitoring data
@@ -270,6 +302,9 @@ ssh_options='-q -o ConnectTimeout=10'	# Options to append to "ssh"
 #       /usr/bin/systemctl start postgresql-9.6, \
 #       /usr/bin/systemctl restart postgresql-9.6
 #
+# Debian/Ubuntu users: use "sudo pg_ctlcluster" to execute service control commands.
+#
+# For more details, see: https://repmgr.org/docs/4.0/configuration-service-commands.html
 
 #service_start_command = ''
 #service_stop_command = ''

repmgr.h

@@ -70,6 +70,7 @@
 #define DEFAULT_ASYNC_QUERY_TIMEOUT          60  /* seconds */
 #define DEFAULT_PRIMARY_NOTIFICATION_TIMEOUT 60  /* seconds */
 #define DEFAULT_PRIMARY_FOLLOW_TIMEOUT       60  /* seconds */
+#define DEFAULT_STANDBY_FOLLOW_TIMEOUT       30  /* seconds */
 #define DEFAULT_BDR_RECOVERY_TIMEOUT         30  /* seconds */
 #define DEFAULT_ARCHIVE_READY_WARNING        16  /* WAL files */
 #define DEFAULT_ARCHIVE_READY_CRITICAL       128 /* WAL files */
@@ -77,6 +78,9 @@
 #define DEFAULT_REPLICATION_LAG_CRITICAL     600 /* seconds */
 #define DEFAULT_WITNESS_SYNC_INTERVAL        15  /* seconds */
 #define DEFAULT_WAIT_START                   30  /* seconds */
+#define DEFAULT_PROMOTE_CHECK_TIMEOUT        60  /* seconds */
+#define DEFAULT_PROMOTE_CHECK_INTERVAL       1   /* seconds */
+#define DEFAULT_STANDBY_RECONNECT_TIMEOUT    60  /* seconds */
 
 #ifndef RECOVERY_COMMAND_FILE
 #define RECOVERY_COMMAND_FILE "recovery.conf"

repmgr_version.h.in

@@ -1,3 +1,3 @@
 #define REPMGR_VERSION_DATE ""
-#define REPMGR_VERSION "4.0.3"
+#define REPMGR_VERSION "4.0.6"
 

repmgrd-bdr.c

@@ -35,6 +35,29 @@ do_bdr_node_check(void)
 	/* nothing to do at the moment */
 }
 
+void
+handle_sigint_bdr(SIGNAL_ARGS)
+{
+	PQExpBufferData event_details;
+
+	initPQExpBuffer(&event_details);
+
+	appendPQExpBuffer(&event_details,
+					  "%s signal received",
+					  postgres_signal_arg == SIGTERM
+					  ? "TERM" : "INT");
+
+	create_event_notification(local_conn,
+							  &config_file_options,
+							  config_file_options.node_id,
+							  "repmgrd_shutdown",
+							  true,
+							  event_details.data);
+	termPQExpBuffer(&event_details);
+
+	terminate(SUCCESS);
+}
+
 
 void
 monitor_bdr(void)
@@ -98,23 +121,6 @@ monitor_bdr(void)
 		exit(ERR_BAD_CONFIG);
 	}
 
-	/* Retrieve record for this node from the local database */
-	record_status = get_node_record(local_conn, config_file_options.node_id, &local_node_info);
-
-	/*
-	 * Terminate if we can't find the local node record. This is a
-	 * "fix-the-config" situation, not a lot else we can do.
-	 */
-	if (record_status != RECORD_FOUND)
-	{
-		log_error(_("unable to retrieve record for local node (ID: %i), terminating"),
-				  local_node_info.node_id);
-		log_hint(_("check that \"repmgr bdr register\" was executed for this node"));
-		PQfinish(local_conn);
-		exit(ERR_BAD_CONFIG);
-	}
-
-
 	if (local_node_info.active == false)
 	{
 		log_error(_("local node (ID: %i) is marked as inactive in repmgr"),
@@ -152,15 +158,16 @@ monitor_bdr(void)
 		cell->node_info->node_status = NODE_STATUS_UP;
 	}
 
-	log_debug("main_loop_bdr() monitoring local node %i", config_file_options.node_id);
+	log_info(_("starting continuous BDR node monitoring on node %i"),
+			 config_file_options.node_id);
 
-	log_info(_("starting continuous BDR node monitoring"));
+	INSTR_TIME_SET_CURRENT(log_status_interval_start);
 
 	while (true)
 	{
 
 		/* monitoring loop */
-		log_verbose(LOG_DEBUG, "BDR check loop...");
+		log_verbose(LOG_DEBUG, "BDR check loop - checking %i nodes", nodes.node_count);
 
 		for (cell = nodes.head; cell; cell = cell->next)
 		{
@@ -262,7 +269,6 @@ loop:
 		if (config_file_options.log_status_interval > 0)
 		{
 			int			log_status_interval_elapsed = calculate_elapsed(log_status_interval_start);
-
 			if (log_status_interval_elapsed >= config_file_options.log_status_interval)
 			{
 				log_info(_("monitoring BDR replication status on node \"%s\" (ID: %i)"),
@@ -273,8 +279,7 @@ loop:
 				{
 					if (cell->node_info->monitoring_state == MS_DEGRADED)
 					{
-						log_detail(
+						log_detail(_("monitoring node \"%s\" (ID: %i) in degraded mode"),
-								   _("monitoring node \"%s\" (ID: %i) in degraded mode"),
 								   cell->node_info->node_name,
 								   cell->node_info->node_id);
 					}

repmgrd-bdr.h

@@ -22,4 +22,5 @@
 extern void do_bdr_node_check(void);
 extern void monitor_bdr(void);
 
+extern void	handle_sigint_bdr(SIGNAL_ARGS);
 #endif							/* _REPMGRD_BDR_H_ */

repmgrd-physical.h

@@ -24,6 +24,7 @@ void		do_physical_node_check(void);
 void		monitor_streaming_primary(void);
 void		monitor_streaming_standby(void);
 void		monitor_streaming_witness(void);
-void		close_connections_physical(void);
+
+void		handle_sigint_physical(SIGNAL_ARGS);
 
 #endif							/* _REPMGRD_PHYSICAL_H_ */

repmgrd.c

@@ -53,9 +53,6 @@ bool		startup_event_logged = false;
 MonitoringState monitoring_state = MS_NORMAL;
 instr_time	degraded_monitoring_start;
 
-static void close_connections(void);
-void		(*_close_connections) (void) = NULL;
-
 /*
  * Record receipt of SIGHUP; will cause configuration file to be reread
  * at the appropriate point in the main loop.
@@ -73,7 +70,6 @@ static void start_monitoring(void);
 #ifndef WIN32
 static void setup_event_handlers(void);
 static void handle_sighup(SIGNAL_ARGS);
-static void handle_sigint(SIGNAL_ARGS);
 #endif
 
 int			calculate_elapsed(instr_time start_time);
@@ -255,6 +251,8 @@ main(int argc, char **argv)
 		strncpy(config_file_options.log_level, cli_log_level, MAXLEN);
 	}
 
+	log_notice(_("repmgrd (repmgr %s) starting up"), REPMGR_VERSION);
+
 	/*
 	 * -m/--monitoring-history, if provided, will override repmgr.conf's
 	 * monitoring_history; this is for backwards compatibility as it's
@@ -329,7 +327,7 @@ main(int argc, char **argv)
 		{
 			log_error(_("unable to determine status of \"repmgr\" extension"));
 			log_detail("%s", PQerrorMessage(local_conn));
-			PQfinish(local_conn);
+			close_connection(&local_conn);
 			exit(ERR_DB_QUERY);
 		}
 
@@ -346,19 +344,33 @@ main(int argc, char **argv)
 		}
 
 		log_hint(_("check that this node is part of a repmgr cluster"));
-		PQfinish(local_conn);
+		close_connection(&local_conn);
 		exit(ERR_BAD_CONFIG);
 	}
 
 	/* Retrieve record for this node from the local database */
 	record_status = get_node_record(local_conn, config_file_options.node_id, &local_node_info);
 
+	/*
+	 * Terminate if we can't find the local node record. This is a
+	 * "fix-the-config" situation, not a lot else we can do.
+	 */
+
 	if (record_status != RECORD_FOUND)
 	{
 		log_error(_("no metadata record found for this node - terminating"));
-		log_hint(_("check that 'repmgr (primary|standby) register' was executed for this node"));
 
-		PQfinish(local_conn);
+		switch (config_file_options.replication_type)
+		{
+			case REPLICATION_TYPE_PHYSICAL:
+				log_hint(_("check that 'repmgr (primary|standby) register' was executed for this node"));
+				break;
+			case REPLICATION_TYPE_BDR:
+				log_hint(_("check that 'repmgr bdr register' was executed for this node"));
+				break;
+		}
+
+		close_connection(&local_conn);
 		terminate(ERR_BAD_CONFIG);
 	}
 
@@ -377,7 +389,7 @@ main(int argc, char **argv)
 		{
 			log_error(_("unable to write to shared memory"));
 			log_hint(_("ensure \"shared_preload_libraries\" includes \"repmgr\""));
-			PQfinish(local_conn);
+			close_connection(&local_conn);
 			terminate(ERR_BAD_CONFIG);
 		}
 	}
@@ -389,7 +401,6 @@ main(int argc, char **argv)
 	}
 	else
 	{
-		_close_connections = close_connections_physical;
 		log_debug("node id is %i, upstream node id is %i",
 				  local_node_info.node_id,
 				  local_node_info.upstream_node_id);
@@ -440,6 +451,7 @@ start_monitoring(void)
 				break;
 			case WITNESS:
 				monitor_streaming_witness();
+				break;
 			case BDR:
 				monitor_bdr();
 				return;
@@ -612,11 +624,6 @@ check_and_create_pid_file(const char *pid_file)
 
 
 #ifndef WIN32
-static void
-handle_sigint(SIGNAL_ARGS)
-{
-	terminate(SUCCESS);
-}
 
 /* SIGHUP: set flag to re-read config file at next convenient time */
 static void
@@ -629,8 +636,23 @@ static void
 setup_event_handlers(void)
 {
 	pqsignal(SIGHUP, handle_sighup);
-	pqsignal(SIGINT, handle_sigint);
+
-	pqsignal(SIGTERM, handle_sigint);
+	/*
+	 * we want to be able to write a "repmgrd_shutdown" event, so delegate
+	 * signal handling to the respective replication type handler, as it
+	 * will know best which database connection to use
+	 */
+	switch (config_file_options.replication_type)
+	{
+		case REPLICATION_TYPE_BDR:
+			pqsignal(SIGINT, handle_sigint_bdr);
+			pqsignal(SIGTERM, handle_sigint_bdr);
+			break;
+		case REPLICATION_TYPE_PHYSICAL:
+			pqsignal(SIGINT, handle_sigint_physical);
+			pqsignal(SIGTERM, handle_sigint_physical);
+			break;
+	}
 }
 #endif
 
@@ -679,17 +701,29 @@ PGconn *
 try_reconnect(t_node_info *node_info)
 {
 	PGconn	   *conn;
+	t_conninfo_param_list conninfo_params = T_CONNINFO_PARAM_LIST_INITIALIZER;
 
 	int			i;
 
 	int			max_attempts = config_file_options.reconnect_attempts;
 
+	initialize_conninfo_params(&conninfo_params, false);
+
+
+	/* we assume by now the conninfo string is parseable */
+	(void) parse_conninfo_string(node_info->conninfo, &conninfo_params, NULL, false);
+
+	/* set some default values if not explicitly provided */
+	param_set_ine(&conninfo_params, "connect_timeout", "2");
+	param_set_ine(&conninfo_params, "fallback_application_name", "repmgr");
+
 	for (i = 0; i < max_attempts; i++)
 	{
 		log_info(_("checking state of node %i, %i of %i attempts"),
 				 node_info->node_id, i + 1, max_attempts);
-		if (is_server_available(node_info->conninfo) == true)
+		if (is_server_available_params(&conninfo_params) == true)
 		{
+
 			log_notice(_("node has recovered, reconnecting"));
 
 			/*
@@ -697,14 +731,18 @@ try_reconnect(t_node_info *node_info)
 			 * connection denied due to connection exhaustion - fall back to
 			 * degraded monitoring? - make that configurable
 			 */
-			conn = establish_db_connection(node_info->conninfo, false);
+
+			conn = establish_db_connection_by_params(&conninfo_params, false);
+
 			if (PQstatus(conn) == CONNECTION_OK)
 			{
+				free_conninfo_params(&conninfo_params);
+
 				node_info->node_status = NODE_STATUS_UP;
 				return conn;
 			}
 
-			PQfinish(conn);
+			close_connection(&conn);
 			log_notice(_("unable to reconnect to node"));
 		}
 
@@ -716,13 +754,14 @@ try_reconnect(t_node_info *node_info)
 		}
 	}
 
-
 	log_warning(_("unable to reconnect to node %i after %i attempts"),
 				node_info->node_id,
 				max_attempts);
 
 	node_info->node_status = NODE_STATUS_DOWN;
 
+	free_conninfo_params(&conninfo_params);
+
 	return NULL;
 }
 
@@ -758,24 +797,9 @@ print_monitoring_state(MonitoringState monitoring_state)
 }
 
 
-static void
-close_connections()
-{
-	if (_close_connections != NULL)
-		_close_connections();
-
-	if (local_conn != NULL && PQstatus(local_conn) == CONNECTION_OK)
-	{
-		PQfinish(local_conn);
-		local_conn = NULL;
-	}
-
-}
-
 void
 terminate(int retval)
 {
-	close_connections();
 	logger_shutdown();
 
 	if (pid_file)