Fix comment typo

There's no compelling reason to require "archive_mode" to be enabled
for streaming replication. It is of course a good idea to archive WAL
using e.g. barman ( http://www.pgbarman.org/ ) as part of a comprehensive
backup strategy, but repmgr and streaming replication work fine without
it.

Per GitHub #141.

Also revise the configuration check for "archive_command" to be
triggered only when "archive_mode" is not "off", as from PostgreSQL
9.5 onwards "archive_mode" can also be "on" or "always".

CONTRIBUTING.md

@@ -2,7 +2,7 @@ License and Contributions
 =========================
 
 `repmgr` is licensed under the GPL v3.  All of its code and documentation is
-Copyright 2010-2015, 2ndQuadrant Limited.  See the files COPYRIGHT and LICENSE for
+Copyright 2010-2016, 2ndQuadrant Limited.  See the files COPYRIGHT and LICENSE for
 details.
 
 The development of repmgr has primarily been sponsored by 2ndQuadrant customers.

COPYRIGHT

@@ -1,4 +1,4 @@
-Copyright (c) 2010-2015, 2ndQuadrant Limited
+Copyright (c) 2010-2016, 2ndQuadrant Limited
 All rights reserved.
 
 This program is free software: you can redistribute it and/or modify

HISTORY

@@ -1,3 +1,6 @@
+3.0.4   2016-01-
+        Remove requirement for 'archive_mode' to be enabled (Ian)
+
 3.0.3   2016-01-04
         Create replication slot if required before base backup is run (Abhijit)
         standy clone: when using rsync, clean up "pg_replslot" directory (Ian)

Makefile

@@ -1,6 +1,6 @@
 #
 # Makefile
-# Copyright (c) 2ndQuadrant, 2010-2015
+# Copyright (c) 2ndQuadrant, 2010-2016
 
 repmgrd_OBJS = dbutils.o config.o repmgrd.o log.o strutil.o
 repmgr_OBJS = dbutils.o check_dir.o config.o repmgr.o log.o strutil.o

check_dir.c

@@ -1,6 +1,6 @@
 /*
  * check_dir.c - Directories management functions
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

check_dir.h

@@ -1,6 +1,6 @@
 /*
  * check_dir.h
- * Copyright (c) 2ndQuadrant, 2010-2015
+ * Copyright (c) 2ndQuadrant, 2010-2016
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

config.c

@@ -1,6 +1,6 @@
 /*
  * config.c - Functions to parse the config file
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

config.h

@@ -1,6 +1,6 @@
 /*
  * config.h
- * Copyright (c) 2ndQuadrant, 2010-2015
+ * Copyright (c) 2ndQuadrant, 2010-2016
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

dbutils.c

@@ -1,6 +1,6 @@
 /*
  * dbutils.c - Database connection/management functions
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

dbutils.h

@@ -1,6 +1,6 @@
 /*
  * dbutils.h
- * Copyright (c) 2ndQuadrant, 2010-2015
+ * Copyright (c) 2ndQuadrant, 2010-2016
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

errcode.h

@@ -1,6 +1,6 @@
 /*
  * errcode.h
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

log.c

@@ -1,6 +1,6 @@
 /*
  * log.c - Logging methods
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  * This module is a set of methods for logging (currently only syslog)
  *

log.h

@@ -1,6 +1,6 @@
 /*
  * log.h
- * Copyright (c) 2ndQuadrant, 2010-2015
+ * Copyright (c) 2ndQuadrant, 2010-2016
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

repmgr.c

@@ -1,6 +1,6 @@
 /*
  * repmgr.c - Command interpreter for the repmgr package
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  * This module is a command-line utility to easily setup a cluster of
  * hot standby servers for an HA environment
@@ -1637,7 +1637,7 @@ do_standby_clone(void)
 	}
 
 	/*
-	 * If configuration files were not inside the data directory, we;ll need to
+	 * If configuration files were not inside the data directory, we'll need to
 	 * copy them via SSH (unless `--ignore-external-config-files` was provided)
 	 *
 	 * TODO: add option to place these files in the same location on the
@@ -3667,31 +3667,18 @@ check_upstream_config(PGconn *conn, int server_version_num, bool exit_on_error)
 		}
 	}
 
-	i = guc_set(conn, "archive_mode", "=", "on");
-	if (i == 0 || i == -1)
-	{
-		if (i == 0)
-			log_err(_("parameter 'archive_mode' must be set to 'on'\n"));
-
-		if (exit_on_error == true)
-		{
-			PQfinish(conn);
-			exit(ERR_BAD_CONFIG);
-		}
-
-		config_ok = false;
-	}
-
 
 	/*
-	 * check that 'archive_command' is non empty (however it's not practical to
+	 * If archive_mode is enabled, check that 'archive_command' is non empty
-	 * check that it's actually valid)
+	 * (however it's not practical to check that it actually represents a valid
+	 * command).
 	 *
-	 * if 'archive_mode' is not on, pg_settings returns '(disabled)' regardless
+	 * From PostgreSQL 9.5, archive_mode can be one of 'off', 'on' or 'always'
-	 * of what's in 'archive_command', so until 'archive_mode' is on we can't
+	 * so for ease of backwards compatibility, rather than explicitly check for an
-	 * properly check it.
+	 * enabled mode, check that it's not "off".
 	 */
-	if (guc_set(conn, "archive_mode", "=", "on"))
+
+	if (guc_set(conn, "archive_mode", "!=", "off"))
 	{
 		i = guc_set(conn, "archive_command", "!=", "");
 
@@ -3713,9 +3700,11 @@ check_upstream_config(PGconn *conn, int server_version_num, bool exit_on_error)
 
 	/*
 	 * Check that 'hot_standby' is on. This isn't strictly necessary
-	 * for the primary server, however the assumption is that configuration
+	 * for the primary server, however the assumption is that we'll be
-	 * should be consistent for all servers in a cluster.
+	 * cloning standbys and thus copying the primary configuration;
+	 * this way the standby will be correctly configured by default.
 	 */
+
 	i = guc_set(conn, "hot_standby", "=", "on");
 	if (i == 0 || i == -1)
 	{

repmgr.h

@@ -1,6 +1,6 @@
 /*
  * repmgr.h
- * Copyright (c) 2ndQuadrant, 2010-2015
+ * Copyright (c) 2ndQuadrant, 2010-2016
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

repmgr.sql

@@ -1,7 +1,7 @@
 /*
  * repmgr.sql
  *
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  */
 

repmgrd.c

@@ -1,6 +1,6 @@
 /*
  * repmgrd.c - Replication manager daemon
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  * This module connects to the nodes of a replication cluster and monitors
  * how far are they from master

sql/Makefile

@@ -1,7 +1,7 @@
 #
 # Makefile
 #
-# Copyright (c) 2ndQuadrant, 2010-2015
+# Copyright (c) 2ndQuadrant, 2010-2016
 #
 
 MODULE_big = repmgr_funcs

sql/repmgr_funcs.sql.in

@@ -1,6 +1,6 @@
 /*
  * repmgr_function.sql
- * Copyright (c) 2ndQuadrant, 2010-2015
+ * Copyright (c) 2ndQuadrant, 2010-2016
  *
  */
 

sql/uninstall_repmgr_funcs.sql

@@ -1,6 +1,6 @@
 /*
  * uninstall_repmgr_funcs.sql
- * Copyright (c) 2ndQuadrant, 2010-2015
+ * Copyright (c) 2ndQuadrant, 2010-2016
  *
  */
 

strutil.c

@@ -1,7 +1,7 @@
 /*
  * strutil.c
  *
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

strutil.h

@@ -1,6 +1,6 @@
 /*
  * strutil.h
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  *
  * This program is free software: you can redistribute it and/or modify

uninstall_repmgr.sql

@@ -1,7 +1,7 @@
 /*
  * uninstall_repmgr.sql
  *
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  */