Fix alignment and syntax

This commit introduces three new options:
  - start_command
  - stop_command
  - restart_command

If these are set, repmgr will issue the specified command instead
of the default pg_ctl commands

CONTRIBUTING.md

@@ -0,0 +1,29 @@
+License and Contributions
+=========================
+
+`repmgr` is licensed under the GPL v3.  All of its code and documentation is
+Copyright 2010-2016, 2ndQuadrant Limited.  See the files COPYRIGHT and LICENSE for
+details.
+
+The development of repmgr has primarily been sponsored by 2ndQuadrant customers.
+
+Additional work has been sponsored by the 4CaaST project for cloud computing,
+which has received funding from the European Union's Seventh Framework Programme
+(FP7/2007-2013) under grant agreement 258862.
+
+Contributions to `repmgr` are welcome, and will be listed in the file `CREDITS`.
+2ndQuadrant Limited requires that any contributions provide a copyright
+assignment and a disclaimer of any work-for-hire ownership claims from the
+employer of the developer.  This lets us make sure that all of the repmgr
+distribution remains free code.  Please contact info@2ndQuadrant.com for a
+copy of the relevant Copyright Assignment Form.
+
+Code style
+----------
+
+Code in repmgr is formatted to a consistent style using the following command:
+
+    astyle --style=ansi --indent=tab --suffix=none *.c *.h
+
+Contributors should reformat their code similarly before submitting code to
+the project, in order to minimize merge conflicts with other work.

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

FAILOVER.rst

@@ -1,231 +1 @@
-====================================================
- PostgreSQL Automatic Failover - User Documentation
-====================================================
-
-Automatic Failover
-==================
-
-repmgr allows for automatic failover when it detects the failure of the master node.
-Following is a quick setup for this.
-
-Installation
-============
-
-For convenience, we define:
-
-**node1**
-    is the fully qualified domain name of the Master server, IP 192.168.1.10
-**node2**
-    is the fully qualified domain name of the Standby server, IP 192.168.1.11
-**witness**
-    is the fully qualified domain name of the server used as a witness, IP 192.168.1.12
-
-**Note:** We don't recommend using names with the status of a server like «masterserver»,
-because it would be confusing once a failover takes place and the Master is
-now on the «standbyserver».
-
-Summary
--------
-
-2 PostgreSQL servers are involved in the replication.  Automatic failover needs
-a vote to decide what server it should promote, so an odd number is required.
-A witness-repmgrd is installed in a third server where it uses a PostgreSQL
-cluster to communicate with other repmgrd daemons.
-
-1. Install PostgreSQL in all the servers involved (including the witness server)
-
-2. Install repmgr in all the servers involved (including the witness server)
-
-3. Configure the Master PostreSQL
-
-4. Clone the Master to the Standby using "repmgr standby clone" command
-
-5. Configure repmgr in all the servers involved (including the witness server)
-
-6. Register Master and Standby nodes
-
-7. Initiate witness server
-
-8. Start the repmgrd daemons in all nodes
-
-**Note** A complete High-Availability design needs at least 3 servers to still have
-a backup node after a first failure.
-
-Install PostgreSQL
-------------------
-
-You can install PostgreSQL using any of the recommended methods. You should ensure
-it's 9.0 or later.
-
-Install repmgr
---------------
-
-Install repmgr following the steps in the README file.
-
-Configure PostreSQL
--------------------
-
-Log in to node1.
-
-Edit the file postgresql.conf and modify the parameters::
-
-  listen_addresses='*'
-  wal_level = 'hot_standby'
-  archive_mode = on
-  archive_command = 'cd .'   # we can also use exit 0, anything that
-                             # just does nothing
-  max_wal_senders = 10
-  wal_keep_segments = 5000   # 80 GB required on pg_xlog
-  hot_standby = on
-  shared_preload_libraries = 'repmgr_funcs'
-
-Edit the file pg_hba.conf and add lines for the replication::
-
-  host     repmgr           repmgr      127.0.0.1/32            trust
-  host     repmgr           repmgr      192.168.1.10/30         trust
-  host     replication      all         192.168.1.10/30         trust
-
-**Note:** It is also possible to use a password authentication (md5), .pgpass file
-should be edited to allow connection between each node.
-
-Create the user and database to manage replication::
-
-  su - postgres
-  createuser -s repmgr
-  createdb -O repmgr repmgr
-  psql -f /usr/share/postgresql/9.0/contrib/repmgr_funcs.sql repmgr
-
-Restart the PostgreSQL server::
-
-  pg_ctl -D $PGDATA restart
-
-And check everything is fine in the server log.
-
-Create the ssh-key for the postgres user and copy it to other servers::
-
-  su - postgres
-  ssh-keygen             # /!\ do not use a passphrase /!\
-  cat ~/.ssh/id_rsa.pub > ~/.ssh/authorized_keys
-  chmod 600 ~/.ssh/authorized_keys
-  exit
-  rsync -avz ~postgres/.ssh/authorized_keys node2:~postgres/.ssh/
-  rsync -avz ~postgres/.ssh/authorized_keys witness:~postgres/.ssh/
-  rsync -avz ~postgres/.ssh/id_rsa* node2:~postgres/.ssh/
-  rsync -avz ~postgres/.ssh/id_rsa* witness:~postgres/.ssh/
-
-Clone Master
-------------
-
-Log in to node2.
-
-Clone node1 (the current Master)::
-
-  su - postgres
-  repmgr -d repmgr -U repmgr -h node1 standby clone 
-
-Start the PostgreSQL server::
-
-  pg_ctl -D $PGDATA start
-
-And check everything is fine in the server log.
-
-Configure repmgr
-----------------
-
-Log in to each server and configure repmgr by editing the file
-/etc/repmgr/repmgr.conf::
-
-  cluster=my_cluster
-  node=1
-  node_name=earth
-  conninfo='host=192.168.1.10 dbname=repmgr user=repmgr'
-  master_response_timeout=60
-  reconnect_attempts=6
-  reconnect_interval=10
-  failover=automatic
-  promote_command='promote_command.sh'
-  follow_command='repmgr standby follow -f /etc/repmgr/repmgr.conf'
-
-**cluster**
-    is the name of the current replication.
-**node**
-    is the number of the current node (1, 2 or 3 in the current example).
-**node_name**
-    is an identifier for every node.
-**conninfo**
-    is used to connect to the local PostgreSQL server (where the configuration file is) from any node. In the witness server configuration you need to add a 'port=5499' to the conninfo.
-**master_response_timeout**
-    is the maximum amount of time we are going to wait before deciding the master has died and start the failover procedure.
-**reconnect_attempts**
-    is the number of times we will try to reconnect to master after a failure has been detected and before start the failover procedure.
-**reconnect_interval**
-    is the amount of time between retries to reconnect to master after a failure has been detected and before start the failover procedure.
-**failover**
-    configure behavior: *manual* or *automatic*.
-**promote_command**
-    the command executed to do the failover (including the PostgreSQL failover itself). The command must return 0 on success.
-**follow_command**
-    the command executed to address the current standby to another Master. The command must return 0 on success.
-
-Register Master and Standby
----------------------------
-
-Log in to node1.
-
-Register the node as Master::
-
-  su - postgres
-  repmgr -f /etc/repmgr/repmgr.conf master register
-
-Log in to node2. Register it as a standby::
-
-  su - postgres
-  repmgr -f /etc/repmgr/repmgr.conf standby register
-
-Initialize witness server
--------------------------
-
-Log in to witness.
-
-Initialize the witness server::
-
-  su - postgres
-  repmgr -d repmgr -U repmgr -h 192.168.1.10 -D $WITNESS_PGDATA -f /etc/repmgr/repmgr.conf witness create
-
-The witness server needs the following information from the command
-line:
-
-* Connection details for the current master, to copy the cluster
-  configuration.
-* A location for initializing its own $PGDATA.
-
-repmgr will also ask for the superuser password on the witness database so
-it can reconnect when needed (the command line option --initdb-no-pwprompt
-will set up a password-less superuser).
-
-Start the repmgrd daemons
--------------------------
-
-Log in to node2 and witness::
-
-  su - postgres
-  repmgrd -f /etc/repmgr/repmgr.conf --daemonize -> /var/log/postgresql/repmgr.log 2>&1
-
-**Note:** The Master does not need a repmgrd daemon.
-
-Suspend Automatic behavior
-==========================
-
-Edit the repmgr.conf of the node to remove from automatic processing and change::
-
-  failover=manual
-
-Then, signal repmgrd daemon::
-
-  su - postgres
-  kill -HUP $(pidof repmgrd)
-
-Usage
-=====
-
-The repmgr documentation is in the README file (how to build, options, etc.)
+The contents of this file have been incorporated into the main README.md document.

FAQ.md

@@ -34,6 +34,11 @@ General
   replication slots, setting a higher figure will make adding new nodes
   easier.
 
+- Does `repmgr` support hash indexes?
+
+  No. Hash indexes and replication do not mix well and their use is
+  explicitly discouraged; see:
+    https://www.postgresql.org/docs/current/interactive/sql-createindex.html#AEN74175
 
 `repmgr`
 --------
@@ -90,6 +95,48 @@ General
 
   This option is only available when using the `--rsync-only` option.
 
+- How can I make the witness server use a particular port?
+
+  By default the witness server is configured to use port 5499; this
+  is intended to support running the witness server as  a separate
+  instance on a normal node server, rather than on its own dedicated server.
+
+  To specify different port for the witness server, supply the port number
+  in the `conninfo` string in `repmgr.conf`
+  (repmgr 3.0.1 and earlier: use the `-l/--local-port` option)
+
+- Do I need to include `shared_preload_libraries = 'repmgr_funcs'`
+  in `postgresql.conf` if I'm not using `repmgrd`?
+
+  No, the `repmgr_funcs` library is only needed when running `repmgrd`.
+  If you later decide to run `repmgrd`, you just need to add
+  `shared_preload_libraries = 'repmgr_funcs'` and restart PostgreSQL.
+
+- I've provided replication permission for the `repmgr` user in `pg_hba.conf`
+  but `repmgr`/`repmgrd` complains it can't connect to the server... Why?
+
+  `repmgr`/`repmgrd` need to be able to connect to the repmgr database
+  with a normal connection to query metadata. The `replication` connection
+  permission is for PostgreSQL's streaming replication and doesn't
+  necessarily need to be the `repmgr` user.
+
+- When cloning a standby, why do I need to provide the connection parameters
+  for the primary server on the command line, not in the configuration file?
+
+  Cloning a standby is a one-time action; the role of the server being cloned
+  from could change, so fixing it in the configuration file would create
+  confusion. If `repmgr` needs to establish a connection to the primary
+  server, it can retrieve this from the `repl_nodes` table or if necessary
+  scan the replication cluster until it locates the active primary.
+
+- Why is there no foreign key on the `node_id` column in the `repl_events`
+  table?
+
+  Under some circumstances event notifications can be generated for servers
+  which have not yet been registered; it's also useful to retain a record
+  of events which includes servers removed from the replication cluster
+  which no longer have an entry in the `repl_nodes` table.
+
 `repmgrd`
 ---------
 
@@ -102,7 +149,7 @@ General
 
 - How can I prevent a node from ever being promoted to master?
 
-  In `rempgr.conf`, set its priority to a value of 0 or less.
+  In `repmgr.conf`, set its priority to a value of 0 or less.
 
 - Does `repmgrd` support delayed standbys?
 
@@ -117,3 +164,8 @@ General
 
   Note that after registering a delayed standby, `repmgrd` will only start
   once the metadata added in the master node has been replicated.
+
+- How can I get `repmgrd` to rotate its logfile?
+
+  Configure your system's `logrotate` service to do this; see example
+  in README.md

HISTORY

@@ -1,4 +1,99 @@
-3.0
+3.1.5   2016-08-15
+        repmgrd: in a failover situation, prevent endless looping when
+          attempting to establish the status of a node with
+          `failover=manual` (Ian)
+        repmgrd: improve handling of failover events on standbys with
+          `failover=manual`, and create a new event notification
+          for this, `standby_disconnect_manual` (Ian)
+        repmgr: add further event notifications (Gianni)
+        repmgr: when executing `standby switchover`, don't collect remote
+          command output unless required (Gianni, Ian)
+        repmgrd: improve standby monitoring query (Ian, based on suggestion
+          from  Álvaro)
+        repmgr: various command line handling improvements (Ian)
+
+3.1.4   2016-07-12
+        repmgr: new configuration option for setting "restore_command"
+          in the recovery.conf file generated by repmgr (Martín)
+        repmgr: add --csv option to "repmgr cluster show" (Gianni)
+        repmgr: enable provision of a conninfo string as the -d/--dbname
+          parameter, similar to other PostgreSQL utilities (Ian)
+        repmgr: during switchover operations improve detection of
+          demotion candidate shutdown (Ian)
+        various bugfixes and documentation updates (Ian, Martín)
+
+3.1.3   2016-05-17
+        repmgrd: enable monitoring when a standby is catching up by
+          replaying archived WAL (Ian)
+        repmgrd: when upstream_node_id is NULL, assume upstream node
+          to be current master (Ian)
+        repmgrd: check for reappearance of the master node if standby
+          promotion fails (Ian)
+        improve handling of rsync failure conditions (Martín)
+
+3.1.2   2016-04-12
+        Fix pg_ctl path generation in do_standby_switchover() (Ian)
+        Regularly sync witness server repl_nodes table (Ian)
+        Documentation improvements (Gianni, dhyannataraj)
+        (Experimental) ensure repmgr handles failover slots when copying
+          in rsync mode (Craig, Ian)
+        rsync mode handling fixes (Martín)
+        Enable repmgr to compile against 9.6devel (Ian)
+
+3.1.1   2016-02-24
+        Add '-P/--pwprompt' option for "repmgr create witness" (Ian)
+        Prevent repmgr/repmgrd running as root (Ian)
+
+3.1.0   2016-02-01
+        Add "repmgr standby switchover" command (Ian)
+        Revised README file (Ian)
+        Remove requirement for 'archive_mode' to be enabled (Ian)
+        Improve -?/--help output, showing default values if relevant (Ian)
+        Various bugfixes to command line/configuration parameter handling (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)
+        Improve --help output (Ian)
+        Improve config file parsing (Ian)
+        Various logging output improvements, including explicit HINTS (Ian)
+        Add --log-level to explicitly set log level on command line (Ian)
+        Repurpose --verbose to display extra log output (Ian)
+        Add --terse to hide hints and other non-critical output (Ian)
+        Reference internal functions with explicit catalog path (Ian)
+        When following a new primary, have repmgr (not repmgrd) create the new slot (Ian)
+        Add /etc/repmgr.conf as a default configuration file location (Ian)
+        Prevent repmgrd's -v/--verbose option expecting a parameter (Ian)
+        Prevent invalid replication_lag values being written to the monitoring table (Ian)
+        Improve repmgrd behaviour when monitored standby node is temporarily
+          unavailable (Martín)
+
+3.0.2   2015-10-02
+        Improve handling of --help/--version options; and improve help output (Ian)
+        Improve handling of situation where logfile can't be opened (Ian)
+        Always pass -D/--pgdata option to pg_basebackup (Ian)
+        Bugfix: standby clone --force does not empty pg_xlog (Gianni)
+        Bugfix: autofailover with reconnect_attempts > 1 (Gianni)
+        Bugfix: ignore comments after values (soxwellfb)
+        Bugfix: handle string values in 'node' parameter correctly (Gregory Duchatelet)
+        Allow repmgr to be compiled with a newer libpq (Marco)
+        Bugfix: call update_node_record_set_upstream() for STANDBY FOLLOW (Tomas)
+        Update `repmgr --help` output (per Github report from renard)
+        Update tablespace remapping in --rsync-only mode for 9.5 and later (Ian)
+        Deprecate `-l/--local-port` option - the port can be extracted
+          from the conninfo string in repmgr.conf (Ian)
+        Add STANDBY UNREGISTER (Vik Fearing)
+        Don't fail with error when registering master if schema already defined (Ian)
+        Fixes to whitespace handling when parsing config file (Ian)
+
+3.0.1   2015-04-16
+        Prevent repmgrd from looping infinitely if node was not registered (Ian)
+        When promoting a standby, have repmgr (not repmgrd) handle metadata updates (Ian)
+        Re-use replication slot if it already exists (Ian)
+        Prevent a test SSH connection being made when not needed (Ian)
+        Correct monitoring table column names (Ian)
+
+3.0     2015-03-27
         Require PostgreSQL 9.3 or later (Ian)
         Use `pg_basebackup` by default (instead of `rsync`) to clone standby servers (Ian)
         Use `pg_ctl promote` to promote a standby to primary
@@ -11,6 +106,11 @@
         General usability and logging message improvements (Ian)
         Code consolidation and cleanup (Ian)
 
+2.0.3   2015-04-16
+        Add -S/--superuser option for witness database creation Ian)
+        Add -c/--fast-checkpoint option for cloning (Christoph)
+        Add option "--initdb-no-pwprompt" (Ian)
+
 2.0.2   2015-02-17
         Add "--checksum" in rsync when using "--force" (Jaime)
         Use createdb/createuser instead of psql (Jaime)

Makefile

@@ -1,24 +1,33 @@
 #
 # Makefile
-# Copyright (c) 2ndQuadrant, 2010-2015
+# Copyright (c) 2ndQuadrant, 2010-2016
+
+HEADERS = $(wildcard *.h)
 
 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
+repmgr_OBJS = dbutils.o check_dir.o config.o repmgr.o log.o strutil.o dirmod.o
 
 DATA = repmgr.sql uninstall_repmgr.sql
 
 PG_CPPFLAGS = -I$(libpq_srcdir)
-PG_LIBS = $(libpq_pgport)
+PG_LIBS     = $(libpq_pgport)
 
-all:  repmgrd repmgr
+
+all: repmgrd repmgr
 	$(MAKE) -C sql
 
 repmgrd: $(repmgrd_OBJS)
-	$(CC) $(CFLAGS) $(repmgrd_OBJS) $(PG_LIBS) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o repmgrd
+	$(CC) -o repmgrd $(CFLAGS) $(repmgrd_OBJS) $(PG_LIBS) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS)
 	$(MAKE) -C sql
 
 repmgr: $(repmgr_OBJS)
-	$(CC) $(CFLAGS) $(repmgr_OBJS) $(PG_LIBS) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o repmgr
+	$(CC) -o repmgr $(CFLAGS) $(repmgr_OBJS) $(PG_LIBS) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS)
+
+# Make all objects depend on all include files. This is a bit of a
+# shotgun approach, but the codebase is small enough that a complete rebuild
+# is very fast anyway.
+$(repmgr_OBJS): $(HEADERS)
+$(repmgrd_OBJS): $(HEADERS)
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
@@ -31,8 +40,8 @@ include $(top_builddir)/src/Makefile.global
 include $(top_srcdir)/contrib/contrib-global.mk
 endif
 
-# XXX: Try to use PROGRAM construct (see pgxs.mk) someday. Right now
-# is overriding pgxs install.
+# XXX: This overrides the pgxs install target - we're building two binaries,
+# which is not supported by pgxs.mk's PROGRAM construct.
 install: install_prog install_ext
 
 install_prog:
@@ -43,6 +52,12 @@ install_prog:
 install_ext:
 	$(MAKE) -C sql install
 
+# Distribution-specific package building targets
+# ----------------------------------------------
+#
+# XXX we recommend using the PGDG-supplied packages where possible;
+# see README.md for details.
+
 install_rhel:
 	mkdir -p '$(DESTDIR)/etc/init.d/'
 	$(INSTALL_PROGRAM) RHEL/repmgrd.init '$(DESTDIR)/etc/init.d/repmgrd'
@@ -67,16 +82,21 @@ clean:
 	rm -f repmgr
 	$(MAKE) -C sql clean
 
+# Get correct version numbers and install paths, depending on your postgres version
+PG_VERSION = $(shell pg_config --version | cut -d ' ' -f 2 | cut -d '.' -f 1,2)
+REPMGR_VERSION = $(shell grep REPMGR_VERSION version.h | cut -d ' ' -f 3 | cut -d '"' -f 2)
+PKGLIBDIR = $(shell pg_config --pkglibdir)
+SHAREDIR = $(shell pg_config --sharedir)
+
 deb: repmgrd repmgr
 	mkdir -p ./debian/usr/bin
 	cp repmgrd repmgr ./debian/usr/bin/
-	mkdir -p ./debian/usr/share/postgresql/9.0/contrib/
-	cp sql/repmgr_funcs.sql ./debian/usr/share/postgresql/9.0/contrib/
-	cp sql/uninstall_repmgr_funcs.sql ./debian/usr/share/postgresql/9.0/contrib/
-	mkdir -p ./debian/usr/lib/postgresql/9.0/lib/
-	cp sql/repmgr_funcs.so ./debian/usr/lib/postgresql/9.0/lib/
+	mkdir -p ./debian$(SHAREDIR)/contrib/
+	cp sql/repmgr_funcs.sql ./debian$(SHAREDIR)/contrib/
+	cp sql/uninstall_repmgr_funcs.sql ./debian$(SHAREDIR)/contrib/
+	mkdir -p ./debian$(PKGLIBDIR)/
+	cp sql/repmgr_funcs.so ./debian$(PKGLIBDIR)/
 	dpkg-deb --build debian
-	mv debian.deb ../postgresql-repmgr-9.0_1.0.0.deb
+	mv debian.deb ../postgresql-repmgr-$(PG_VERSION)_$(REPMGR_VERSION).deb
 	rm -rf ./debian/usr
 
-

PACKAGES.md

@@ -4,10 +4,10 @@ Packaging
 Notes on RedHat Linux, Fedora, and CentOS Builds
 ------------------------------------------------
 
-The RPM packages of PostgreSQL put ``pg_config`` into the ``postgresql-devel``
+The RPM packages of PostgreSQL put `pg_config` into the `postgresql-devel`
 package, not the main server one.  And if you have a RPM install of PostgreSQL
 9.0, the entire PostgreSQL binary directory will not be in your PATH by default
-either.  Individual utilities are made available via the ``alternatives``
+either.  Individual utilities are made available via the `alternatives`
 mechanism, but not all commands will be wrapped that way.  The files installed
 by repmgr will certainly not be in the default PATH for the postgres user
 on such a system.  They will instead be in /usr/pgsql-9.0/bin/ on this
@@ -15,57 +15,61 @@ type of system.
 
 When building repmgr against a RPM packaged build, you may discover that some
 development packages are needed as well.  The following build errors can
-occur::
+occur:
 
-  /usr/bin/ld: cannot find -lxslt
-  /usr/bin/ld: cannot find -lpam
+    /usr/bin/ld: cannot find -lxslt
+    /usr/bin/ld: cannot find -lpam
 
-Install the following packages to correct those::
+Install the following packages to correct those:
 
-  yum install libxslt-devel
-  yum install pam-devel
+
+    yum install libxslt-devel
+    yum install pam-devel
 
 If building repmgr as a regular user, then doing the install into the system
-directories using sudo, the syntax is hard.  ``pg_config`` won't be in root's
-path either.  The following recipe should work::
+directories using sudo, the syntax is hard.  `pg_config` won't be in root's
+path either.  The following recipe should work:
+
+    sudo PATH="/usr/pgsql-9.0/bin:$PATH" make USE_PGXS=1 install
 
-  sudo PATH="/usr/pgsql-9.0/bin:$PATH" make USE_PGXS=1 install
 
 Issues with 32 and 64 bit RPMs
 ------------------------------
 
-If when building, you receive a series of errors of this form::
+If when building, you receive a series of errors of this form:
 
   /usr/bin/ld: skipping incompatible /usr/pgsql-9.0/lib/libpq.so when searching for -lpq
 
 This is likely because you have both the 32 and 64 bit versions of the
-``postgresql90-devel`` package installed.  You can check that like this::
+`postgresql90-devel` package installed.  You can check that like this:
 
-  rpm -qa --queryformat '%{NAME}\t%{ARCH}\n'  | grep postgresql90-devel
+    rpm -qa --queryformat '%{NAME}\t%{ARCH}\n'  | grep postgresql90-devel
 
 And if two packages appear, one for i386 and one for x86_64, that's not supposed
 to be allowed.
 
 This can happen when using the PGDG repo to install that package;
-here is an example sessions demonstrating the problem case appearing::
+here is an example sessions demonstrating the problem case appearing:
 
-  # yum install postgresql-devel
-  ..
-  Setting up Install Process
-  Resolving Dependencies
-  --> Running transaction check
-  ---> Package postgresql90-devel.i386 0:9.0.2-2PGDG.rhel5 set to be updated
-  ---> Package postgresql90-devel.x86_64 0:9.0.2-2PGDG.rhel5 set to be updated
-  --> Finished Dependency Resolution
 
-  Dependencies Resolved
+    # yum install postgresql-devel
+    ..
+    Setting up Install Process
+    Resolving Dependencies
+    --> Running transaction check
+    ---> Package postgresql90-devel.i386 0:9.0.2-2PGDG.rhel5 set to be updated
+    ---> Package postgresql90-devel.x86_64 0:9.0.2-2PGDG.rhel5 set to be updated
+    --> Finished Dependency Resolution
+
+    Dependencies Resolved
+
+    =========================================================================
+     Package               Arch      Version              Repository    Size
+    =========================================================================
+    Installing:
+     postgresql90-devel    i386      9.0.2-2PGDG.rhel5    pgdg90        1.5 M
+     postgresql90-devel    x86_64    9.0.2-2PGDG.rhel5    pgdg90        1.6 M
 
-  =========================================================================
-   Package               Arch      Version              Repository    Size
-  =========================================================================
-  Installing:
-   postgresql90-devel    i386      9.0.2-2PGDG.rhel5    pgdg90        1.5 M
-   postgresql90-devel    x86_64    9.0.2-2PGDG.rhel5    pgdg90        1.6 M
 
 Note how both the i386 and x86_64 platform architectures are selected for
 installation.  Your main PostgreSQL package will only be compatible with one of
@@ -73,14 +77,14 @@ those, and if the repmgr build finds the wrong postgresql90-devel these
 "skipping incompatible" messages appear.
 
 In this case, you can temporarily remove both packages, then just install the
-correct one for your architecture.  Example::
+correct one for your architecture.  Example:
 
-  rpm -e postgresql90-devel --allmatches
-  yum install postgresql90-devel-9.0.2-2PGDG.rhel5.x86_64
+    rpm -e postgresql90-devel --allmatches
+    yum install postgresql90-devel-9.0.2-2PGDG.rhel5.x86_64
 
 Instead just deleting the package from the wrong platform might not leave behind
 the correct files, due to the way in which these accidentally happen to interact.
-If you already tried to build repmgr before doing this, you'll need to do::
+If you already tried to build repmgr before doing this, you'll need to do:
 
     make USE_PGXS=1 clean
 
@@ -89,19 +93,19 @@ to get rid of leftover files from the wrong architecture.
 Notes on Ubuntu, Debian or other Debian-based Builds
 ----------------------------------------------------
 
-The Debian packages of PostgreSQL put ``pg_config`` into the development package
-called ``postgresql-server-dev-$version``.
+The Debian packages of PostgreSQL put `pg_config` into the development package
+called `postgresql-server-dev-$version`.
 
 When building repmgr against a Debian packages build, you may discover that some
 development packages are needed as well. You will need the following development
-packages installed::
+packages installed:
 
-  sudo apt-get install libxslt-dev libxml2-dev libpam-dev libedit-dev
+    sudo apt-get install libxslt-dev libxml2-dev libpam-dev libedit-dev
 
-If your using Debian packages for PostgreSQL and are building repmgr with the
-USE_PGXS option you also need to install the corresponding development package::
+If you're using Debian packages for PostgreSQL and are building repmgr with the
+USE_PGXS option you also need to install the corresponding development package:
 
-  sudo apt-get install postgresql-server-dev-9.0
+    sudo apt-get install postgresql-server-dev-9.0
 
 If you build and install repmgr manually it will not be on the system path. The
 binaries will be installed in /usr/lib/postgresql/$version/bin/ which is not on
@@ -110,14 +114,14 @@ multiple installed versions of PostgreSQL on the same system through a wrapper
 called pg_wrapper and repmgr is not (yet) known to this wrapper.
 
 You can solve this in many different ways, the most Debian like is to make an
-alternate for repmgr and repmgrd::
+alternate for repmgr and repmgrd:
 
-  sudo update-alternatives --install /usr/bin/repmgr repmgr /usr/lib/postgresql/9.0/bin/repmgr 10
-  sudo update-alternatives --install /usr/bin/repmgrd repmgrd /usr/lib/postgresql/9.0/bin/repmgrd 10
+    sudo update-alternatives --install /usr/bin/repmgr repmgr /usr/lib/postgresql/9.0/bin/repmgr 10
+    sudo update-alternatives --install /usr/bin/repmgrd repmgrd /usr/lib/postgresql/9.0/bin/repmgrd 10
 
-You can also make a deb package of repmgr using::
+You can also make a deb package of repmgr using:
 
-  make USE_PGXS=1 deb
+    make USE_PGXS=1 deb
 
 This will build a Debian package one level up from where you build, normally the
 same directory that you have your repmgr/ directory in.

QUICKSTART.md

@@ -1,114 +1 @@
-repmgr quickstart guide
-=======================
-
-This quickstart guide provides some annotated examples on basic
-`repmgr` setup. It assumes you are familiar with PostgreSQL replication
-concepts setup and Linux/UNIX system administration.
-
-For the purposes of this guide, we'll assume the database user will be
-`repmgr_usr` and the database will be `repmgr_db`.
-
-
-Master setup
-------------
-
-1. Configure PostgreSQL
-
-  - create user and database:
-
-	```
-	CREATE ROLE repmgr_usr LOGIN SUPERUSER;
-	CREATE DATABASE repmgr_db OWNER repmgr_usr;
-	```
-
-  - configure `postgresql.conf` for replication (see above)
-
-  - update `pg_hba.conf`, e.g.:
-
-	```
-	host    repmgr_db       repmgr_usr  192.168.1.0/24         trust
-	host    replication     repmgr_usr  192.168.1.0/24         trust
-	```
-
-  Restart the PostgreSQL server after making these changes.
-
-2. Create the `repmgr` configuration file:
-
-        $ cat /path/to/repmgr/node1/repmgr.conf
-        cluster=test
-        node=1
-        node_name=node1
-        conninfo='host=repmgr_node1 user=repmgr_usr dbname=repmgr_db'
-        pg_bindir=/path/to/postgres/bin
-
-   (For an annotated `repmgr.conf` file, see `repmgr.conf.sample` in the
-   repository's root directory).
-
-3. Register the master node with `repmgr`:
-
-        $ repmgr -f /path/to/repmgr/node1/repmgr.conf --verbose master register
-        [2015-03-03 17:45:53] [INFO] repmgr connecting to master database
-        [2015-03-03 17:45:53] [INFO] repmgr connected to master, checking its state
-        [2015-03-03 17:45:53] [INFO] master register: creating database objects inside the repmgr_test schema
-        [2015-03-03 17:45:53] [NOTICE] Master node correctly registered for cluster test with id 1 (conninfo: host=localhost user=repmgr_usr dbname=repmgr_db)
-
-Standby setup
--------------
-
-1. Use `repmgr standby clone` to clone a standby from the master:
-
-        repmgr -D /path/to/standby/data -d repmgr_db -U repmgr_usr --verbose standby clone 192.168.1.2
-        [2015-03-03 18:18:21] [NOTICE] No configuration file provided and default file './repmgr.conf' not found - continuing with default values
-        [2015-03-03 18:18:21] [NOTICE] repmgr Destination directory ' /path/to/standby/data' provided
-        [2015-03-03 18:18:21] [INFO] repmgr connecting to upstream node
-        [2015-03-03 18:18:21] [INFO] repmgr connected to upstream node, checking its state
-        [2015-03-03 18:18:21] [INFO] Successfully connected to upstream node. Current installation size is 27 MB
-        [2015-03-03 18:18:21] [NOTICE] Starting backup...
-        [2015-03-03 18:18:21] [INFO] creating directory " /path/to/standby/data"...
-        [2015-03-03 18:18:21] [INFO] Executing: 'pg_basebackup -l "repmgr base backup"  -h localhost -p 9595 -U repmgr_usr -D  /path/to/standby/data '
-        NOTICE:  pg_stop_backup complete, all required WAL segments have been archived
-        [2015-03-03 18:18:23] [NOTICE] repmgr standby clone (using pg_basebackup) complete
-        [2015-03-03 18:18:23] [NOTICE] HINT: You can now start your postgresql server
-        [2015-03-03 18:18:23] [NOTICE] for example : pg_ctl -D  /path/to/standby/data start
-
-  Note that at this point it does not matter if the `repmgr.conf` file is not found.
-
-  This will clone the PostgreSQL database files from the master, including its
-  `postgresql.conf` and `pg_hba.conf` files, and additionally automatically create
-  the `recovery.conf` file containing the correct parameters to start streaming
-  from the primary node.
-
-2. Start the PostgreSQL server
-
-3. Create the `repmgr` configuration file:
-
-        $ cat /path/node2/repmgr/repmgr.conf
-        cluster=test
-        node=2
-        node_name=node2
-        conninfo='host=repmgr_node2 user=repmgr_usr dbname=repmgr_db'
-        pg_bindir=/path/to/postgres/bin
-
-4. Register the standby node with `repmgr`:
-
-        $ repmgr -f /path/to/repmgr/node2/repmgr.conf --verbose standby register
-        [2015-03-03 18:24:34] [NOTICE] Opening configuration file: /path/to/repmgr/node2/repmgr.conf
-        [2015-03-03 18:24:34] [INFO] repmgr connecting to standby database
-        [2015-03-03 18:24:34] [INFO] repmgr connecting to master database
-        [2015-03-03 18:24:34] [INFO] finding node list for cluster 'test'
-        [2015-03-03 18:24:34] [INFO] checking role of cluster node '1'
-        [2015-03-03 18:24:34] [INFO] repmgr connected to master, checking its state
-        [2015-03-03 18:24:34] [INFO] repmgr registering the standby
-        [2015-03-03 18:24:34] [INFO] repmgr registering the standby complete
-        [2015-03-03 18:24:34] [NOTICE] Standby node correctly registered for cluster test with id 2 (conninfo: host=localhost user=repmgr_usr dbname=repmgr_db)
-
-
-This concludes the basic `repmgr` setup of master and standby. The records
-created in the `repl_nodes` table should look something like this:
-
-        repmgr_db=# SELECT * from repmgr_test.repl_nodes;
-         id |  type   | upstream_node_id | cluster | name  |                     conninfo                    | slot_name | priority | active
-        ----+---------+------------------+---------+-------+-------------------------------------------------+-----------+----------+--------
-          1 | primary |                  | test    | node1 | host=localhost user=repmgr_usr dbname=repmgr_db |           |        0 | t
-          2 | standby |                1 | test    | node2 | host=localhost user=repmgr_usr dbname=repmgr_db |           |        0 | t
-        (2 rows)
+The contents of this file have been incorporated into the main README.md document.

RHEL/repmgr3-93.spec

@@ -1,61 +0,0 @@
-Summary: repmgr
-Name: repmgr
-Version: 3.0
-Release: 1
-License: GPLv3
-Group: System Environment/Daemons
-URL: http://repmgr.org
-Packager: Ian Barwick <ian@2ndquadrant.com>
-Vendor: 2ndQuadrant Limited
-Distribution: centos
-Source0: %{name}-%{version}.tar.gz
-BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root
-
-%description
-repmgr is a utility suite which greatly simplifies
-the process of setting up and managing replication
-using streaming replication within a cluster of
-PostgreSQL servers.
-
-%prep
-%setup
-
-%build
-export PATH=$PATH:/usr/pgsql-9.3/bin/
-%{__make} USE_PGXS=1
-
-%install
-[ "%{buildroot}" != "/" ] && %{__rm} -rf %{buildroot}
-
-export PATH=$PATH:/usr/pgsql-9.3/bin/
-%{__make} USE_PGXS=1 install DESTDIR=%{buildroot} INSTALL="install -p"
-%{__make} USE_PGXS=1 install_prog DESTDIR=%{buildroot} INSTALL="install -p"
-%{__make} USE_PGXS=1 install_rhel DESTDIR=%{buildroot} INSTALL="install -p"
-
-
-%clean
-[ "%{buildroot}" != "/" ] && %{__rm} -rf %{buildroot}
-
-
-%files
-%defattr(-,root,root)
-/usr/bin/repmgr
-/usr/bin/repmgrd
-/usr/pgsql-9.3/bin/repmgr
-/usr/pgsql-9.3/bin/repmgrd
-/usr/pgsql-9.3/lib/repmgr_funcs.so
-/usr/pgsql-9.3/share/contrib/repmgr.sql
-/usr/pgsql-9.3/share/contrib/repmgr_funcs.sql
-/usr/pgsql-9.3/share/contrib/uninstall_repmgr.sql
-/usr/pgsql-9.3/share/contrib/uninstall_repmgr_funcs.sql
-%attr(0755,root,root)/etc/init.d/repmgrd
-%attr(0644,root,root)/etc/sysconfig/repmgrd
-%attr(0644,root,root)/etc/repmgr/repmgr.conf.sample
-
-%changelog
-* Tue Mar 10 2015 Ian Barwick ian@2ndquadrant.com>
-- build for repmgr 3.0
-* Thu Jun 05 2014 Nathan Van Overloop <nathan.van.overloop@nexperteam.be> 2.0.2
-- fix witness creation to create db and user if needed
-* Fri Apr 04 2014 Nathan Van Overloop <nathan.van.overloop@nexperteam.be> 2.0.1
-- initial build for RHEL6

RHEL/repmgrd.init

@@ -1,114 +0,0 @@
-#!/bin/bash
-#
-# repmgrd	Start up the repmgrd daemon
-#		repmrgd (replication manager daemon)
-#
-# chkconfig: -  75 16
-# description: repmgrd is the repliation manager daemon \
-# The repmgrd replication management and monitoring daemon for PostgreSQL.
-
-### BEGIN INIT INFO
-# Provides: repmgrd
-# Required-Start:  $local_fs $remote_fs $network $syslog postgresql
-# Required-Stop:     $local_fs $remote_fs $network $syslog postgresql
-# Should-Start:	     $syslog postgresql-9.3
-# Should-Stop: $syslog postgresql-9.3
-# Short-Description: start and stop repmrgd
-# Description: Enable repmgrd replication management and monitoring daemon for PostgreSQL
-#	       this is used to monitor a postgresql cluster.
-### END INIT INFO
-
-# Source function library.
-. /etc/init.d/functions
-
-# Source networking configuration.
-. /etc/sysconfig/network
-
-prog=repmgrd
-REPMGRD_ENABLED=yes
-REPMGRD_OPTS=
-REPMGRD_USER=postgres
-DAEMONIZE="-d"
-
-# pull in sysconfig settings
-[ -f /etc/sysconfig/repmgrd ] && . /etc/sysconfig/repmgrd
-
-LOCKFILE=/var/lock/subsys/$prog
-RETVAL=0
-
-case "$REPMGRD_ENABLED" in
-    [Yy]*)
-	#nothing to do here	
-	;;
-    *)
-	exit 2
-	;;
-esac
-
-
-if [ -z "$REPMGRD_OPTS" ]
-then
-    echo "Not starting $prog, REPMGRD_OPTS not set in /etc/sysconfig/$prog"
-    exit 2
-fi
-
-start() {
-	[ "$EUID" != "0" ] && exit 4
-        [ "$NETWORKING" = "no" ] && exit 1
-
-        # Start daemons.
-        echo -n $"Starting $prog: "
-        daemon --user $REPMGRD_USER $prog $DAEMONIZE $REPMGRD_OPTS
-        RETVAL=$?
-        echo
-        [ $RETVAL -eq 0 ] && touch $LOCKFILE
-        return $RETVAL
-}
-
-stop() {
-	[ "$EUID" != "0" ] && exit 4
-        echo -n $"Shutting down $prog: "
-        killproc $prog
-        RETVAL=$?
-        echo
-        [ $RETVAL -eq 0 ] && rm -f $LOCKFILE
-        return $RETVAL
-}
-status() {
-        if [ -f "$LOCKFILE" ]; then
-            echo "$prog is running"
-        else
-	    RETVAL=3
-            echo "$prog is stopped"
-        fi
-        return $RETVAL
-}
-
-# See how we were called.
-case "$1" in
-  start)
-        start
-        ;;
-  stop)
-        stop
-        ;;
-  status)
-        status $prog
-        ;;
-  restart|force-reload)
-        stop
-        start
-        ;;
-  try-restart|condrestart)
-        if status $prog > /dev/null; then
-            stop
-            start
-        fi
-        ;;
-  reload)
-        exit 3
-        ;;
-  *)
-        echo $"Usage: $0 {start|stop|status|restart|try-restart|force-reload}"
-        exit 2
-esac

RHEL/repmgrd.sysconfig

@@ -1,4 +0,0 @@
-#default sysconfig file for repmrgd
-#custom overrides can be placed here
-
-REPMGRD_OPTS="-f /etc/repmgr/repmgr.conf"

SSH-RSYNC.md

@@ -1,35 +1,36 @@
 Set up trusted copy between postgres accounts
 ---------------------------------------------
 
-If you need to use rsync to clone standby servers, the postgres account
-on your master and standby servers must be each able to access the other
+If you need to use `rsync` to clone standby servers, the `postgres` account
+on your primary and standby servers must be each able to access the other
 using SSH without a password.
 
-First generate a ssh key, using an empty passphrase, and copy the resulting
-keys and a maching authorization file to a privledged user on the other system::
+First generate an ssh key, using an empty passphrase, and copy the resulting
+keys and a matching authorization file to a privileged user account on the other
+system:
 
-  [postgres@node1]$ ssh-keygen -t rsa
-  Generating public/private rsa key pair.
-  Enter file in which to save the key (/var/lib/pgsql/.ssh/id_rsa):
-  Enter passphrase (empty for no passphrase):
-  Enter same passphrase again:
-  Your identification has been saved in /var/lib/pgsql/.ssh/id_rsa.
-  Your public key has been saved in /var/lib/pgsql/.ssh/id_rsa.pub.
-  The key fingerprint is:
-  aa:bb:cc:dd:ee:ff:aa:11:22:33:44:55:66:77:88:99 postgres@db1.domain.com
-  [postgres@node1]$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
-  [postgres@node1]$ chmod go-rwx ~/.ssh/*
-  [postgres@node1]$ cd ~/.ssh
-  [postgres@node1]$ scp id_rsa.pub id_rsa authorized_keys user@node2:
+    [postgres@node1]$ ssh-keygen -t rsa
+    Generating public/private rsa key pair.
+    Enter file in which to save the key (/var/lib/pgsql/.ssh/id_rsa):
+    Enter passphrase (empty for no passphrase):
+    Enter same passphrase again:
+    Your identification has been saved in /var/lib/pgsql/.ssh/id_rsa.
+    Your public key has been saved in /var/lib/pgsql/.ssh/id_rsa.pub.
+    The key fingerprint is:
+    aa:bb:cc:dd:ee:ff:aa:11:22:33:44:55:66:77:88:99 postgres@db1.domain.com
+    [postgres@node1]$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
+    [postgres@node1]$ chmod go-rwx ~/.ssh/*
+    [postgres@node1]$ cd ~/.ssh
+    [postgres@node1]$ scp id_rsa.pub id_rsa authorized_keys user@node2:
 
-Login as a user on the other system, and install the files into the postgres
-user's account::
+Login as a user on the other system, and install the files into the `postgres`
+user's account:
 
-  [user@node2 ~]$ sudo chown postgres.postgres authorized_keys id_rsa.pub id_rsa
-  [user@node2 ~]$ sudo mkdir -p ~postgres/.ssh
-  [user@node2 ~]$ sudo chown postgres.postgres ~postgres/.ssh
-  [user@node2 ~]$ sudo mv authorized_keys id_rsa.pub id_rsa ~postgres/.ssh
-  [user@node2 ~]$ sudo chmod -R go-rwx ~postgres/.ssh
+    [user@node2 ~]$ sudo chown postgres.postgres authorized_keys id_rsa.pub id_rsa
+    [user@node2 ~]$ sudo mkdir -p ~postgres/.ssh
+    [user@node2 ~]$ sudo chown postgres.postgres ~postgres/.ssh
+    [user@node2 ~]$ sudo mv authorized_keys id_rsa.pub id_rsa ~postgres/.ssh
+    [user@node2 ~]$ sudo chmod -R go-rwx ~postgres/.ssh
 
 Now test that ssh in both directions works.  You may have to accept some new
 known hosts in the process.

TODO

@@ -5,9 +5,16 @@ Known issues in repmgr
   the database server using the ``pg_ctl`` command may accidentally
   terminate after their associated ssh session ends.
 
+* PGPASSFILE may not be passed to pg_basebackup
+
+
 Planned feature improvements
 ============================
 
+* Use 'primary' instead of 'master' in documentation and log output
+  for consistency with PostgreSQL documentation. See also commit
+  870b0a53b627eeb9aca1fc14cbafe25b5beafe12.
+
 * A better check which standby did receive most of the data
 
 * Make the fact that a standby may be delayed a factor in the voting
@@ -18,8 +25,50 @@ Planned feature improvements
 * Create the repmgr user/database on "master register".
 
 * Use pg_basebackup for the data directory, and ALSO rsync for the
-configuration files.
+  configuration files.
 
-* Use pg_basebackup -X s
-  NOTE: this can be used by including `-X s` in the configuration parameter
-  `pg_basebackup_options`
+* If no configuration file supplied, search in sensible default locations
+  (currently: current directory and `pg_config --sysconfdir`); if
+  possible this should include the location provided by the package,
+  if installed.
+
+* repmgrd: if connection to the upstream node fails on startup, optionally
+  retry for a certain period before giving up; this will cover cases when
+  e.g. primary and standby are both starting up, and the standby comes up
+  before the primary. See github issue #80.
+
+* make old master node ID available for event notification commands
+  (See github issue #80).
+
+* repmgr standby clone: possibility to use barman instead of performing a new base backup
+
+* possibility to transform a failed master into a new standby with pg_rewind
+
+* "repmgr standby switchover" to promote a standby in a controlled manner
+   and convert the existing primary into a standby
+
+* make repmgrd more robust
+
+* repmgr: when cloning a standby using pg_basebackup and replication slots are
+  requested, activate the replication slot using pg_receivexlog to negate the
+  need to set `wal_keep_segments` just for the initial clone (9.4 and 9.5).
+
+* repmgr: enable "standby follow" to point a standby at another standby, not
+  just the replication cluster master (see GitHub #130)
+
+
+Usability improvements
+======================
+
+* repmgr: add interrupt handler, so that if the program is interrupted
+  while running a backup, an attempt can be made to execute pg_stop_backup()
+  on the primary, to prevent an orphaned backup state existing.
+
+* repmgr: when unregistering a node, delete any entries in the repl_monitoring
+  table.
+
+* repmgr: for "standby unregister", accept connection parameters for the
+  primary and perform metadata updates (and slot removal) directly on
+  the primary, to allow a shutdown standby to be unregistered
+  (currently the standby must still be running, which means the replication
+  slot can't be dropped).

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
@@ -23,14 +23,19 @@
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
+#include <ftw.h>
 
 /* NB: postgres_fe must be included BEFORE check_dir */
-#include "postgres_fe.h"
-#include "check_dir.h"
+#include <libpq-fe.h>
+#include <postgres_fe.h>
 
+#include "check_dir.h"
 #include "strutil.h"
 #include "log.h"
 
+static bool _create_pg_dir(char *dir, bool force, bool for_witness);
+static int unlink_dir_callback(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf);
+
 /*
  * make sure the directory either doesn't exist or is empty
  * we use this function to check the new data directory and
@@ -243,6 +248,19 @@ is_pg_dir(char *dir)
 
 bool
 create_pg_dir(char *dir, bool force)
+{
+	return _create_pg_dir(dir, force, false);
+}
+
+bool
+create_witness_pg_dir(char *dir, bool force)
+{
+	return _create_pg_dir(dir, force, true);
+}
+
+
+static bool
+_create_pg_dir(char *dir, bool force, bool for_witness)
 {
 	bool		pg_dir = false;
 
@@ -279,21 +297,33 @@ create_pg_dir(char *dir, bool force)
 
 			pg_dir = is_pg_dir(dir);
 
-			/*
-			 * we use force to reduce the time needed to restore a node which
-			 * turn async after a failover or anything else
-			 */
+
 			if (pg_dir && force)
 			{
+
+				/*
+				 * The witness server does not store any data other than a copy of the
+				 * repmgr metadata, so in --force mode we can simply overwrite the
+				 * directory.
+				 *
+				 * For non-witness servers, we'll leave the data in place, both to reduce
+				 * the risk of unintentional data loss and to make it possible for the
+				 * data directory to be brought up-to-date with rsync.
+				 */
+				if (for_witness)
+				{
+					log_notice(_("deleting existing data directory \"%s\"\n"), dir);
+					nftw(dir, unlink_dir_callback, 64, FTW_DEPTH | FTW_PHYS);
+				}
 				/* Let it continue */
 				break;
 			}
 			else if (pg_dir && !force)
 			{
-				log_warning(_("\nThis looks like a PostgreSQL directory.\n"
-							  "If you are sure you want to clone here, "
-							  "please check there is no PostgreSQL server "
-							  "running and use the --force option\n"));
+				log_hint(_("This looks like a PostgreSQL directory.\n"
+							"If you are sure you want to clone here, "
+							"please check there is no PostgreSQL server "
+							"running and use the -F/--force option\n"));
 				return false;
 			}
 
@@ -306,3 +336,14 @@ create_pg_dir(char *dir, bool force)
 	}
 	return true;
 }
+
+static int
+unlink_dir_callback(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf)
+{
+    int rv = remove(fpath);
+
+    if (rv)
+        perror(fpath);
+
+    return rv;
+}

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
@@ -26,5 +26,6 @@ bool		create_dir(char *dir);
 bool		set_dir_permissions(char *dir);
 bool		is_pg_dir(char *dir);
 bool		create_pg_dir(char *dir, bool force);
+bool		create_witness_pg_dir(char *dir, bool force);
 
 #endif

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
@@ -26,10 +26,28 @@
 
 static void parse_event_notifications_list(t_configuration_options *options, const char *arg);
 static void tablespace_list_append(t_configuration_options *options, const char *arg);
+static void exit_with_errors(ErrorList *config_errors);
 
+const static char *_progname = NULL;
+static char config_file_path[MAXPGPATH];
+static bool config_file_provided = false;
+bool config_file_found = false;
+
+
+void
+set_progname(const char *argv0)
+{
+	_progname = get_progname(argv0);
+}
+
+const char *
+progname(void)
+{
+	return _progname;
+}
 
 /*
- * parse_config()
+ * load_config()
  *
  * Set default options and overwrite with values from provided configuration
  * file.
@@ -38,131 +56,257 @@ static void tablespace_list_append(t_configuration_options *options, const char
  *
  * Any configuration options changed in this function must also be changed in
  * reload_config()
+ *
+ * NOTE: this function is called before the logger is set up, so we need
+ * to handle the verbose option ourselves; also the default log level is NOTICE,
+ * so we can't use DEBUG.
  */
 bool
-parse_config(const char *config_file, t_configuration_options *options)
+load_config(const char *config_file, bool verbose, t_configuration_options *options, char *argv0)
 {
-	char	   *s,
-				buff[MAXLINELENGTH];
-	char		config_file_buf[MAXLEN];
-	char		name[MAXLEN];
-	char		value[MAXLEN];
-	bool 		config_file_provided = false;
-	FILE	   *fp;
-
-	/* Sanity checks */
+	struct stat stat_config;
 
 	/*
 	 * If a configuration file was provided, check it exists, otherwise
-	 * emit an error
+	 * emit an error and terminate. We assume that if a user explicitly
+	 * provides a configuration file, they'll want to make sure it's
+	 * used and not fall back to any of the defaults.
 	 */
 	if (config_file[0])
 	{
-		struct stat config;
+		strncpy(config_file_path, config_file, MAXPGPATH);
+		canonicalize_path(config_file_path);
 
-		strncpy(config_file_buf, config_file, MAXLEN);
-		canonicalize_path(config_file_buf);
-
-		if(stat(config_file_buf, &config) != 0)
+		if (stat(config_file_path, &stat_config) != 0)
 		{
-			log_err(_("provided configuration file '%s' not found: %s\n"),
+			log_err(_("provided configuration file \"%s\" not found: %s\n"),
 					config_file,
 					strerror(errno)
 				);
 			exit(ERR_BAD_CONFIG);
 		}
 
-		config_file_provided = true;
-	}
-
-	/*
-	 * If no configuration file was provided, set to a default file
-	 * which `parse_config()` will attempt to read if it exists
-	 */
-	else
-	{
-		strncpy(config_file_buf, DEFAULT_CONFIG_FILE, MAXLEN);
-	}
-
-
-	fp = fopen(config_file_buf, "r");
-
-	/*
-	 * Since some commands don't require a config file at all, not having one
-	 * isn't necessarily a problem.
-	 *
-	 * If the user explictly provided a configuration file and we can't
-	 * read it we'll raise an error.
-	 *
-	 * If no configuration file was provided, we'll try and read the default\
-	 * file if it exists and is readable, but won't worry if it's not.
-	 */
-	if (fp == NULL)
-	{
-		if(config_file_provided)
+		if (verbose == true)
 		{
-			log_err(_("unable to open provided configuration file '%s'; terminating\n"), config_file_buf);
-			exit(ERR_BAD_CONFIG);
+			log_notice(_("using configuration file \"%s\"\n"), config_file);
 		}
 
-		log_notice(_("no configuration file provided and default file '%s' not found - "
-					 "continuing with default values\n"),
-				   DEFAULT_CONFIG_FILE);
-		return false;
+		config_file_provided = true;
+		config_file_found = true;
 	}
 
-	/* Initialize configuration options with sensible defaults */
+	/*
+	 * If no configuration file was provided, attempt to find a default file
+	 * in this order:
+	 *  - current directory
+	 *  - /etc/repmgr.conf
+	 *  - default sysconfdir
+	 *
+	 * here we just check for the existence of the file; parse_config()
+	 * will handle read errors etc.
+	 */
+	if (config_file_provided == false)
+	{
+		char		my_exec_path[MAXPGPATH];
+		char		sysconf_etc_path[MAXPGPATH];
+
+		/* 1. "./repmgr.conf" */
+		if (verbose == true)
+		{
+			log_notice(_("looking for configuration file in current directory\n"));
+		}
+
+		snprintf(config_file_path, MAXPGPATH, "./%s", CONFIG_FILE_NAME);
+		canonicalize_path(config_file_path);
+
+		if (stat(config_file_path, &stat_config) == 0)
+		{
+			config_file_found = true;
+			goto end_search;
+		}
+
+		/* 2. "/etc/repmgr.conf" */
+		if (verbose == true)
+		{
+			log_notice(_("looking for configuration file in /etc\n"));
+		}
+
+		snprintf(config_file_path, MAXPGPATH, "/etc/%s", CONFIG_FILE_NAME);
+		if (stat(config_file_path, &stat_config) == 0)
+		{
+			config_file_found = true;
+			goto end_search;
+		}
+
+		/* 3. default sysconfdir */
+		if (find_my_exec(argv0, my_exec_path) < 0)
+		{
+			fprintf(stderr, _("%s: could not find own program executable\n"), argv0);
+			exit(EXIT_FAILURE);
+		}
+
+		get_etc_path(my_exec_path, sysconf_etc_path);
+
+		if (verbose == true)
+		{
+			log_notice(_("looking for configuration file in %s\n"), sysconf_etc_path);
+		}
+
+		snprintf(config_file_path, MAXPGPATH, "%s/%s", sysconf_etc_path, CONFIG_FILE_NAME);
+		if (stat(config_file_path, &stat_config) == 0)
+		{
+			config_file_found = true;
+			goto end_search;
+		}
+
+	end_search:
+		if (config_file_found == true)
+		{
+			if (verbose == true)
+			{
+				log_notice(_("configuration file found at: %s\n"), config_file_path);
+			}
+		}
+		else
+		{
+			if (verbose == true)
+			{
+				log_notice(_("no configuration file provided or found\n"));
+			}
+		}
+	}
+
+	return parse_config(options);
+}
+
+
+/*
+ * Parse configuration file; if any errors are encountered,
+ * list them and exit.
+ *
+ * Ensure any default values set here are synced with repmgr.conf.sample
+ * and any other documentation.
+ */
+bool
+parse_config(t_configuration_options *options)
+{
+	FILE	   *fp;
+	char	   *s,
+				buf[MAXLINELENGTH];
+	char		name[MAXLEN];
+	char		value[MAXLEN];
+
+	/* For sanity-checking provided conninfo string */
+	PQconninfoOption *conninfo_options;
+	char	   *conninfo_errmsg = NULL;
+
+	/* Collate configuration file errors here for friendlier reporting */
+	static ErrorList config_errors = { NULL, NULL };
+
+	bool		node_found = false;
+
+	/* Initialize configuration options with sensible defaults
+	 * note: the default log level is set in log.c and does not need
+	 * to be initialised here
+	 */
 	memset(options->cluster_name, 0, sizeof(options->cluster_name));
 	options->node = -1;
 	options->upstream_node = NO_UPSTREAM_NODE;
+	options->use_replication_slots = 0;
 	memset(options->conninfo, 0, sizeof(options->conninfo));
 	options->failover = MANUAL_FAILOVER;
 	options->priority = DEFAULT_PRIORITY;
 	memset(options->node_name, 0, sizeof(options->node_name));
 	memset(options->promote_command, 0, sizeof(options->promote_command));
 	memset(options->follow_command, 0, sizeof(options->follow_command));
+	memset(options->stop_command, 0, sizeof(options->stop_command));
+	memset(options->start_command, 0, sizeof(options->start_command));
+	memset(options->restart_command, 0, sizeof(options->restart_command));
 	memset(options->rsync_options, 0, sizeof(options->rsync_options));
 	memset(options->ssh_options, 0, sizeof(options->ssh_options));
 	memset(options->pg_bindir, 0, sizeof(options->pg_bindir));
 	memset(options->pg_ctl_options, 0, sizeof(options->pg_ctl_options));
 	memset(options->pg_basebackup_options, 0, sizeof(options->pg_basebackup_options));
+	memset(options->restore_command, 0, sizeof(options->restore_command));
 
 	/* default master_response_timeout is 60 seconds */
 	options->master_response_timeout = 60;
 
 	/* default to 6 reconnection attempts at intervals of 10 seconds */
 	options->reconnect_attempts = 6;
-	options->reconnect_intvl = 10;
+	options->reconnect_interval = 10;
 
 	options->monitor_interval_secs = 2;
 	options->retry_promote_interval_secs = 300;
 
+	/* default to resyncing repl_nodes table every 30 seconds on the witness server */
+	options->witness_repl_nodes_sync_interval_secs = 30;
+
 	memset(options->event_notification_command, 0, sizeof(options->event_notification_command));
+	options->event_notifications.head = NULL;
+	options->event_notifications.tail = NULL;
 
 	options->tablespace_mapping.head = NULL;
 	options->tablespace_mapping.tail = NULL;
 
+	/*
+	 * If no configuration file available (user didn't specify and none found
+	 * in the default locations), return with default values
+	 */
+	if (config_file_found == false)
+	{
+		log_verbose(LOG_NOTICE, _("no configuration file provided and no default file found - "
+					 "continuing with default values\n"));
+		return true;
+	}
 
+	fp = fopen(config_file_path, "r");
 
-	/* Read next line */
-	while ((s = fgets(buff, sizeof buff, fp)) != NULL)
+	/*
+	 * A configuration file has been found, either provided by the user
+	 * or found in one of the default locations. If we can't open it,
+	 * fail with an error.
+	 */
+	if (fp == NULL)
+	{
+		if (config_file_provided)
+		{
+			log_err(_("unable to open provided configuration file \"%s\"; terminating\n"), config_file_path);
+		}
+		else
+		{
+			log_err(_("unable to open default configuration file  \"%s\"; terminating\n"), config_file_path);
+		}
+
+		exit(ERR_BAD_CONFIG);
+	}
+
+	/* Read file */
+	while ((s = fgets(buf, sizeof buf, fp)) != NULL)
 	{
 		bool known_parameter = true;
 
-		/* Skip blank lines and comments */
-		if (buff[0] == '\n' || buff[0] == '#')
+		/* Parse name/value pair from line */
+		parse_line(buf, name, value);
+
+		/* Skip blank lines */
+		if (!strlen(name))
 			continue;
 
-		/* Parse name/value pair from line */
-		parse_line(buff, name, value);
+		/* Skip comments */
+		if (name[0] == '#')
+			continue;
 
 		/* Copy into correct entry in parameters struct */
 		if (strcmp(name, "cluster") == 0)
 			strncpy(options->cluster_name, value, MAXLEN);
 		else if (strcmp(name, "node") == 0)
-			options->node = atoi(value);
+		{
+			options->node = repmgr_atoi(value, "node", &config_errors, false);
+			node_found = true;
+		}
 		else if (strcmp(name, "upstream_node") == 0)
-			options->upstream_node = atoi(value);
+			options->upstream_node = repmgr_atoi(value, "upstream_node", &config_errors, false);
 		else if (strcmp(name, "conninfo") == 0)
 			strncpy(options->conninfo, value, MAXLEN);
 		else if (strcmp(name, "rsync_options") == 0)
@@ -189,24 +333,35 @@ parse_config(const char *config_file, t_configuration_options *options)
 			}
 			else
 			{
-				log_err(_("value for 'failover' must be 'automatic' or 'manual'\n"));
-				exit(ERR_BAD_CONFIG);
+				error_list_append(&config_errors,_("value for 'failover' must be 'automatic' or 'manual'\n"));
 			}
 		}
 		else if (strcmp(name, "priority") == 0)
-			options->priority = atoi(value);
+			options->priority = repmgr_atoi(value, "priority", &config_errors, true);
 		else if (strcmp(name, "node_name") == 0)
 			strncpy(options->node_name, value, MAXLEN);
 		else if (strcmp(name, "promote_command") == 0)
 			strncpy(options->promote_command, value, MAXLEN);
 		else if (strcmp(name, "follow_command") == 0)
 			strncpy(options->follow_command, value, MAXLEN);
+		else if (strcmp(name, "stop_command") == 0)
+			strncpy(options->stop_command, value, MAXLEN);
+		else if (strcmp(name, "start_command") == 0)
+			strncpy(options->start_command, value, MAXLEN);
+		else if (strcmp(name, "restart_command") == 0)
+			strncpy(options->restart_command, value, MAXLEN);
 		else if (strcmp(name, "master_response_timeout") == 0)
-			options->master_response_timeout = atoi(value);
+			options->master_response_timeout = repmgr_atoi(value, "master_response_timeout", &config_errors, false);
+		/*
+		 * 'primary_response_timeout' as synonym for 'master_response_timeout' -
+		 * we'll switch terminology in a future release (3.1?)
+		 */
+		else if (strcmp(name, "primary_response_timeout") == 0)
+			options->master_response_timeout = repmgr_atoi(value, "primary_response_timeout", &config_errors, false);
 		else if (strcmp(name, "reconnect_attempts") == 0)
-			options->reconnect_attempts = atoi(value);
+			options->reconnect_attempts = repmgr_atoi(value, "reconnect_attempts", &config_errors, false);
 		else if (strcmp(name, "reconnect_interval") == 0)
-			options->reconnect_intvl = atoi(value);
+			options->reconnect_interval = repmgr_atoi(value, "reconnect_interval", &config_errors, false);
 		else if (strcmp(name, "pg_bindir") == 0)
 			strncpy(options->pg_bindir, value, MAXLEN);
 		else if (strcmp(name, "pg_ctl_options") == 0)
@@ -216,17 +371,22 @@ parse_config(const char *config_file, t_configuration_options *options)
 		else if (strcmp(name, "logfile") == 0)
 			strncpy(options->logfile, value, MAXLEN);
 		else if (strcmp(name, "monitor_interval_secs") == 0)
-			options->monitor_interval_secs = atoi(value);
+			options->monitor_interval_secs = repmgr_atoi(value, "monitor_interval_secs", &config_errors, false);
 		else if (strcmp(name, "retry_promote_interval_secs") == 0)
-			options->retry_promote_interval_secs = atoi(value);
+			options->retry_promote_interval_secs = repmgr_atoi(value, "retry_promote_interval_secs", &config_errors, false);
+		else if (strcmp(name, "witness_repl_nodes_sync_interval_secs") == 0)
+			options->witness_repl_nodes_sync_interval_secs = repmgr_atoi(value, "witness_repl_nodes_sync_interval_secs", &config_errors, false);
 		else if (strcmp(name, "use_replication_slots") == 0)
-			options->use_replication_slots = atoi(value);
+			/* XXX we should have a dedicated boolean argument format */
+			options->use_replication_slots = repmgr_atoi(value, "use_replication_slots", &config_errors, false);
 		else if (strcmp(name, "event_notification_command") == 0)
 			strncpy(options->event_notification_command, value, MAXLEN);
 		else if (strcmp(name, "event_notifications") == 0)
 			parse_event_notifications_list(options, value);
 		else if (strcmp(name, "tablespace_mapping") == 0)
 			tablespace_list_append(options, value);
+		else if (strcmp(name, "restore_command") == 0)
+			strncpy(options->restore_command, value, MAXLEN);
 		else
 		{
 			known_parameter = false;
@@ -239,58 +399,55 @@ parse_config(const char *config_file, t_configuration_options *options)
 		 * we want to accept those, we'd need to add stricter default checking,
 		 * as currently e.g. an empty `node` value will be converted to '0'.
 		 */
-		if(known_parameter == true && !strlen(value)) {
-			log_err(_("no value provided for parameter '%s'\n"), name);
-			exit(ERR_BAD_CONFIG);
+		if (known_parameter == true && !strlen(value)) {
+			char	   error_message_buf[MAXLEN] = "";
+			snprintf(error_message_buf,
+					 MAXLEN,
+					 _("no value provided for parameter \"%s\""),
+					 name);
+
+			error_list_append(&config_errors, error_message_buf);
 		}
 	}
 
 	fclose(fp);
 
-	/* Check config settings */
 
-	/* The following checks are for the presence of the parameter */
-	if (*options->cluster_name == '\0')
+	if (node_found == false)
 	{
-		log_err(_("required parameter 'cluster' was not found\n"));
-		exit(ERR_BAD_CONFIG);
+		error_list_append(&config_errors, _("\"node\": parameter was not found"));
+	}
+	else if (options->node == 0)
+	{
+		error_list_append(&config_errors, _("\"node\": must be greater than zero"));
 	}
 
-	if (options->node == -1)
+	if (strlen(options->conninfo))
 	{
-		log_err(_("required parameter 'node' was not found\n"));
-		exit(ERR_BAD_CONFIG);
+
+		/* Sanity check the provided conninfo string
+		 *
+		 * NOTE: PQconninfoParse() verifies the string format and checks for valid options
+		 * but does not sanity check values
+		 */
+		conninfo_options = PQconninfoParse(options->conninfo, &conninfo_errmsg);
+		if (conninfo_options == NULL)
+		{
+			char	   error_message_buf[MAXLEN] = "";
+			snprintf(error_message_buf,
+					 MAXLEN,
+					 _("\"conninfo\": %s"),
+					 conninfo_errmsg);
+
+			error_list_append(&config_errors, error_message_buf);
+		}
+
+		PQconninfoFree(conninfo_options);
 	}
 
-	if (*options->node_name == '\0')
+	if (config_errors.head != NULL)
 	{
-		log_err(_("required parameter 'node_name' was not found\n"));
-		exit(ERR_BAD_CONFIG);
-	}
-
-	if (*options->conninfo == '\0')
-	{
-		log_err(_("required parameter 'conninfo' was not found\n"));
-		exit(ERR_BAD_CONFIG);
-	}
-
-	/* The following checks are for valid parameter values */
-	if (options->master_response_timeout <= 0)
-	{
-		log_err(_("'master_response_timeout' must be greater than zero\n"));
-		exit(ERR_BAD_CONFIG);
-	}
-
-	if (options->reconnect_attempts < 0)
-	{
-		log_err(_("'reconnect_attempts' must be zero or greater\n"));
-		exit(ERR_BAD_CONFIG);
-	}
-
-	if (options->reconnect_intvl < 0)
-	{
-		log_err(_("'reconnect_interval' must be zero or greater\n"));
-		exit(ERR_BAD_CONFIG);
+		exit_with_errors(&config_errors);
 	}
 
 	return true;
@@ -305,7 +462,7 @@ trim(char *s)
 			   *s2 = &s[strlen(s) - 1];
 
 	/* If string is empty, no action needed */
-	if(s2 < s1)
+	if (s2 < s1)
 		return s;
 
 	/* Trim and delimit right side */
@@ -325,32 +482,58 @@ trim(char *s)
 }
 
 void
-parse_line(char *buff, char *name, char *value)
+parse_line(char *buf, char *name, char *value)
 {
 	int			i = 0;
 	int			j = 0;
 
 	/*
-	 * first we find the name of the parameter
+	 * Extract parameter name, if present
 	 */
 	for (; i < MAXLEN; ++i)
 	{
-		if (buff[i] != '=')
-			name[j++] = buff[i];
-		else
+
+		if (buf[i] == '=')
 			break;
+
+		switch(buf[i])
+		{
+			/* Ignore whitespace */
+			case ' ':
+			case '\n':
+			case '\r':
+			case '\t':
+				continue;
+			default:
+				name[j++] = buf[i];
+		}
 	}
 	name[j] = '\0';
 
 	/*
-	 * Now the value
+	 * Ignore any whitespace following the '=' sign
+	 */
+	for (; i < MAXLEN; ++i)
+	{
+		if (buf[i+1] == ' ')
+			continue;
+		if (buf[i+1] == '\t')
+			continue;
+
+		break;
+	}
+
+	/*
+	 * Extract parameter value
 	 */
 	j = 0;
 	for (++i; i < MAXLEN; ++i)
-		if (buff[i] == '\'')
+		if (buf[i] == '\'')
 			continue;
-		else if (buff[i] != '\n')
-			value[j++] = buff[i];
+		else if (buf[i] == '#')
+			break;
+		else if (buf[i] != '\n')
+			value[j++] = buf[i];
 		else
 			break;
 	value[j] = '\0';
@@ -358,7 +541,7 @@ parse_line(char *buff, char *name, char *value)
 }
 
 bool
-reload_config(char *config_file, t_configuration_options * orig_options)
+reload_config(t_configuration_options *orig_options)
 {
 	PGconn	   *conn;
 	t_configuration_options new_options;
@@ -369,7 +552,7 @@ reload_config(char *config_file, t_configuration_options * orig_options)
 	 */
 	log_info(_("reloading configuration file and updating repmgr tables\n"));
 
-	parse_config(config_file, &new_options);
+	parse_config(&new_options);
 	if (new_options.node == -1)
 	{
 		log_warning(_("unable to parse new configuration, retaining current configuration\n"));
@@ -412,13 +595,13 @@ reload_config(char *config_file, t_configuration_options * orig_options)
 		return false;
 	}
 
-	if (new_options.reconnect_intvl < 0)
+	if (new_options.reconnect_interval < 0)
 	{
 		log_warning(_("new value for 'reconnect_interval' must be zero or greater\n"));
 		return false;
 	}
 
-	if(strcmp(orig_options->conninfo, new_options.conninfo) != 0)
+	if (strcmp(orig_options->conninfo, new_options.conninfo) != 0)
 	{
 		/* Test conninfo string */
 		conn = establish_db_connection(new_options.conninfo, false);
@@ -438,56 +621,56 @@ reload_config(char *config_file, t_configuration_options * orig_options)
 	 */
 
 	/* cluster_name */
-	if(strcmp(orig_options->cluster_name, new_options.cluster_name) != 0)
+	if (strcmp(orig_options->cluster_name, new_options.cluster_name) != 0)
 	{
 		strcpy(orig_options->cluster_name, new_options.cluster_name);
 		config_changed = true;
 	}
 
 	/* conninfo */
-	if(strcmp(orig_options->conninfo, new_options.conninfo) != 0)
+	if (strcmp(orig_options->conninfo, new_options.conninfo) != 0)
 	{
 		strcpy(orig_options->conninfo, new_options.conninfo);
 		config_changed = true;
 	}
 
 	/* node */
-	if(orig_options->node != new_options.node)
+	if (orig_options->node != new_options.node)
 	{
 		orig_options->node = new_options.node;
 		config_changed = true;
 	}
 
 	/* failover */
-	if(orig_options->failover != new_options.failover)
+	if (orig_options->failover != new_options.failover)
 	{
 		orig_options->failover = new_options.failover;
 		config_changed = true;
 	}
 
 	/* priority */
-	if(orig_options->priority != new_options.priority)
+	if (orig_options->priority != new_options.priority)
 	{
 		orig_options->priority = new_options.priority;
 		config_changed = true;
 	}
 
 	/* node_name */
-	if(strcmp(orig_options->node_name, new_options.node_name) != 0)
+	if (strcmp(orig_options->node_name, new_options.node_name) != 0)
 	{
 		strcpy(orig_options->node_name, new_options.node_name);
 		config_changed = true;
 	}
 
 	/* promote_command */
-	if(strcmp(orig_options->promote_command, new_options.promote_command) != 0)
+	if (strcmp(orig_options->promote_command, new_options.promote_command) != 0)
 	{
 		strcpy(orig_options->promote_command, new_options.promote_command);
 		config_changed = true;
 	}
 
 	/* follow_command */
-	if(strcmp(orig_options->follow_command, new_options.follow_command) != 0)
+	if (strcmp(orig_options->follow_command, new_options.follow_command) != 0)
 	{
 		strcpy(orig_options->follow_command, new_options.follow_command);
 		config_changed = true;
@@ -504,76 +687,76 @@ reload_config(char *config_file, t_configuration_options * orig_options)
 	 */
 
 	/* rsync_options */
-	if(strcmp(orig_options->rsync_options, new_options.rsync_options) != 0)
+	if (strcmp(orig_options->rsync_options, new_options.rsync_options) != 0)
 	{
 		strcpy(orig_options->rsync_options, new_options.rsync_options);
 		config_changed = true;
 	}
 
 	/* ssh_options */
-	if(strcmp(orig_options->ssh_options, new_options.ssh_options) != 0)
+	if (strcmp(orig_options->ssh_options, new_options.ssh_options) != 0)
 	{
 		strcpy(orig_options->ssh_options, new_options.ssh_options);
 		config_changed = true;
 	}
 
 	/* master_response_timeout */
-	if(orig_options->master_response_timeout != new_options.master_response_timeout)
+	if (orig_options->master_response_timeout != new_options.master_response_timeout)
 	{
 		orig_options->master_response_timeout = new_options.master_response_timeout;
 		config_changed = true;
 	}
 
 	/* reconnect_attempts */
-	if(orig_options->reconnect_attempts != new_options.reconnect_attempts)
+	if (orig_options->reconnect_attempts != new_options.reconnect_attempts)
 	{
 		orig_options->reconnect_attempts = new_options.reconnect_attempts;
 		config_changed = true;
 	}
 
-	/* reconnect_intvl */
-	if(orig_options->reconnect_intvl != new_options.reconnect_intvl)
+	/* reconnect_interval */
+	if (orig_options->reconnect_interval != new_options.reconnect_interval)
 	{
-		orig_options->reconnect_intvl = new_options.reconnect_intvl;
+		orig_options->reconnect_interval = new_options.reconnect_interval;
 		config_changed = true;
 	}
 
 	/* pg_ctl_options */
-	if(strcmp(orig_options->pg_ctl_options, new_options.pg_ctl_options) != 0)
+	if (strcmp(orig_options->pg_ctl_options, new_options.pg_ctl_options) != 0)
 	{
 		strcpy(orig_options->pg_ctl_options, new_options.pg_ctl_options);
 		config_changed = true;
 	}
 
 	/* pg_basebackup_options */
-	if(strcmp(orig_options->pg_basebackup_options, new_options.pg_basebackup_options) != 0)
+	if (strcmp(orig_options->pg_basebackup_options, new_options.pg_basebackup_options) != 0)
 	{
 		strcpy(orig_options->pg_basebackup_options, new_options.pg_basebackup_options);
 		config_changed = true;
 	}
 
 	/* monitor_interval_secs */
-	if(orig_options->monitor_interval_secs != new_options.monitor_interval_secs)
+	if (orig_options->monitor_interval_secs != new_options.monitor_interval_secs)
 	{
 		orig_options->monitor_interval_secs = new_options.monitor_interval_secs;
 		config_changed = true;
 	}
 
 	/* retry_promote_interval_secs */
-	if(orig_options->retry_promote_interval_secs != new_options.retry_promote_interval_secs)
+	if (orig_options->retry_promote_interval_secs != new_options.retry_promote_interval_secs)
 	{
 		orig_options->retry_promote_interval_secs = new_options.retry_promote_interval_secs;
 		config_changed = true;
 	}
 
 	/* use_replication_slots */
-	if(orig_options->use_replication_slots != new_options.use_replication_slots)
+	if (orig_options->use_replication_slots != new_options.use_replication_slots)
 	{
 		orig_options->use_replication_slots = new_options.use_replication_slots;
 		config_changed = true;
 	}
 
-	if(config_changed == true)
+	if (config_changed == true)
 	{
 		log_debug(_("reload_config(): configuration has changed\n"));
 	}
@@ -586,6 +769,96 @@ reload_config(char *config_file, t_configuration_options * orig_options)
 }
 
 
+void
+error_list_append(ErrorList *error_list, char *error_message)
+{
+	ErrorListCell *cell;
+
+	cell = (ErrorListCell *) pg_malloc0(sizeof(ErrorListCell));
+
+	if (cell == NULL)
+	{
+		log_err(_("unable to allocate memory; terminating.\n"));
+		exit(ERR_BAD_CONFIG);
+	}
+
+	cell->error_message = pg_malloc0(MAXLEN);
+	strncpy(cell->error_message, error_message, MAXLEN);
+
+	if (error_list->tail)
+	{
+		error_list->tail->next = cell;
+	}
+	else
+	{
+		error_list->head = cell;
+	}
+
+	error_list->tail = cell;
+}
+
+
+/*
+ * Convert provided string to an integer using strtol;
+ * on error, if a callback is provided, pass the error message to that,
+ * otherwise exit
+ */
+int
+repmgr_atoi(const char *value, const char *config_item, ErrorList *error_list, bool allow_negative)
+{
+	char	  *endptr;
+	long	   longval = 0;
+	char	   error_message_buf[MAXLEN] = "";
+
+	/* It's possible that some versions of strtol() don't treat an empty
+	 * string as an error.
+	 */
+
+	if (*value == '\0')
+	{
+		snprintf(error_message_buf,
+				 MAXLEN,
+				 _("no value provided for \"%s\""),
+				 config_item);
+	}
+	else
+	{
+		errno = 0;
+		longval = strtol(value, &endptr, 10);
+
+		if (value == endptr || errno)
+		{
+			snprintf(error_message_buf,
+					 MAXLEN,
+					 _("\"%s\": invalid value (provided: \"%s\")"),
+					 config_item, value);
+		}
+	}
+
+	/* Disallow negative values for most parameters */
+	if (allow_negative == false && longval < 0)
+	{
+		snprintf(error_message_buf,
+				 MAXLEN,
+				 _("\"%s\" must be zero or greater (provided: %s)"),
+				 config_item, value);
+	}
+
+	/* Error message buffer is set */
+	if (error_message_buf[0] != '\0')
+	{
+		if (error_list == NULL)
+		{
+			log_err("%s\n", error_message_buf);
+			exit(ERR_BAD_CONFIG);
+		}
+
+		error_list_append(error_list, error_message_buf);
+	}
+
+	return (int32) longval;
+}
+
 
 /*
  * Split argument into old_dir and new_dir and append to tablespace mapping
@@ -602,7 +875,7 @@ tablespace_list_append(t_configuration_options *options, const char *arg)
 	const char *arg_ptr;
 
 	cell = (TablespaceListCell *) pg_malloc0(sizeof(TablespaceListCell));
-	if(cell == NULL)
+	if (cell == NULL)
 	{
 		log_err(_("unable to allocate memory; terminating\n"));
 		exit(ERR_BAD_CONFIG);
@@ -670,7 +943,7 @@ parse_event_notifications_list(t_configuration_options *options, const char *arg
 	for (arg_ptr = arg; arg_ptr <= (arg + strlen(arg)); arg_ptr++)
 	{
 		/* ignore whitespace */
-		if(*arg_ptr == ' ' || *arg_ptr == '\t')
+		if (*arg_ptr == ' ' || *arg_ptr == '\t')
 		{
 			continue;
 		}
@@ -679,13 +952,13 @@ parse_event_notifications_list(t_configuration_options *options, const char *arg
 		 * comma (or end-of-string) should mark the end of an event type -
 		 * just as long as there was something preceding it
 		 */
-		if((*arg_ptr == ',' || *arg_ptr == '\0') && event_type_buf[0] != '\0')
+		if ((*arg_ptr == ',' || *arg_ptr == '\0') && event_type_buf[0] != '\0')
 		{
 			EventNotificationListCell *cell;
 
 			cell = (EventNotificationListCell *) pg_malloc0(sizeof(EventNotificationListCell));
 
-			if(cell == NULL)
+			if (cell == NULL)
 			{
 				log_err(_("unable to allocate memory; terminating\n"));
 				exit(ERR_BAD_CONFIG);
@@ -708,7 +981,7 @@ parse_event_notifications_list(t_configuration_options *options, const char *arg
 			dst_ptr = event_type_buf;
 		}
 		/* ignore duplicated commas */
-		else if(*arg_ptr == ',')
+		else if (*arg_ptr == ',')
 		{
 			continue;
 		}
@@ -718,3 +991,21 @@ parse_event_notifications_list(t_configuration_options *options, const char *arg
 		}
 	}
 }
+
+
+
+static void
+exit_with_errors(ErrorList *config_errors)
+{
+	ErrorListCell *cell;
+
+	log_err(_("%s: following errors were found in the configuration file.\n"), progname());
+
+	for (cell = config_errors->head; cell; cell = cell->next)
+	{
+		log_err("%s\n", cell->error_message);
+	}
+
+	exit(ERR_BAD_CONFIG);
+}
+

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
@@ -24,6 +24,7 @@
 
 #include "strutil.h"
 
+#define CONFIG_FILE_NAME	"repmgr.conf"
 
 typedef struct EventNotificationListCell
 {
@@ -61,31 +62,60 @@ typedef struct
 	char		node_name[MAXLEN];
 	char		promote_command[MAXLEN];
 	char		follow_command[MAXLEN];
+	char		stop_command[MAXLEN];
+	char		start_command[MAXLEN];
+	char		restart_command[MAXLEN];
 	char		loglevel[MAXLEN];
 	char		logfacility[MAXLEN];
 	char		rsync_options[QUERY_STR_LEN];
 	char		ssh_options[QUERY_STR_LEN];
 	int			master_response_timeout;
 	int			reconnect_attempts;
-	int			reconnect_intvl;
+	int			reconnect_interval;
 	char		pg_bindir[MAXLEN];
 	char		pg_ctl_options[MAXLEN];
 	char		pg_basebackup_options[MAXLEN];
+	char		restore_command[MAXLEN];
 	char		logfile[MAXLEN];
 	int			monitor_interval_secs;
 	int			retry_promote_interval_secs;
+	int			witness_repl_nodes_sync_interval_secs;
 	int			use_replication_slots;
 	char		event_notification_command[MAXLEN];
 	EventNotificationList event_notifications;
 	TablespaceList tablespace_mapping;
 }	t_configuration_options;
 
-#define T_CONFIGURATION_OPTIONS_INITIALIZER { "", -1, NO_UPSTREAM_NODE, "", MANUAL_FAILOVER, -1, "", "", "", "", "", "", "", -1, -1, -1, "", "", "", "", 0, 0, 0, "", { NULL, NULL }, {NULL, NULL} }
+/*
+ * The following will initialize the structure with a minimal set of options;
+ * actual defaults are set in parse_config() before parsing the configuration file
+ */
+#define T_CONFIGURATION_OPTIONS_INITIALIZER { "", -1, NO_UPSTREAM_NODE, "", MANUAL_FAILOVER, -1, "", "", "", "", "", "", "", "", "", "", -1, -1, -1, "", "", "", "", "", 0, 0, 0, 0, "", { NULL, NULL }, {NULL, NULL} }
 
+typedef struct ErrorListCell
+{
+	struct ErrorListCell *next;
+	char			     *error_message;
+} ErrorListCell;
 
-bool		parse_config(const char *config_file, t_configuration_options *options);
+typedef struct ErrorList
+{
+	ErrorListCell *head;
+	ErrorListCell *tail;
+} ErrorList;
+
+void set_progname(const char *argv0);
+const char * progname(void);
+
+bool		load_config(const char *config_file, bool verbose, t_configuration_options *options, char *argv0);
+bool		reload_config(t_configuration_options *orig_options);
+bool		parse_config(t_configuration_options *options);
 void		parse_line(char *buff, char *name, char *value);
 char	   *trim(char *s);
-bool		reload_config(char *config_file, t_configuration_options *orig_options);
+void		error_list_append(ErrorList *error_list, char *error_message);
+int			repmgr_atoi(const char *s,
+						const char *config_item,
+						ErrorList *error_list,
+						bool allow_negative);
 
 #endif

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
@@ -20,16 +20,79 @@
 #ifndef _REPMGR_DBUTILS_H_
 #define _REPMGR_DBUTILS_H_
 
+#include "access/xlogdefs.h"
+
 #include "config.h"
 #include "strutil.h"
 
 
+typedef enum {
+	UNKNOWN = 0,
+	MASTER,
+	STANDBY,
+	WITNESS
+} t_server_type;
 
+/*
+ * Struct to store node information
+ */
+typedef struct s_node_info
+{
+	int			  node_id;
+	int			  upstream_node_id;
+	t_server_type type;
+	char		  name[MAXLEN];
+	char		  conninfo_str[MAXLEN];
+	char		  slot_name[MAXLEN];
+	int			  priority;
+	bool		  active;
+	bool		  is_ready;
+	bool		  is_visible;
+	XLogRecPtr	  xlog_location;
+}	t_node_info;
+
+
+#define T_NODE_INFO_INITIALIZER { \
+  NODE_NOT_FOUND, \
+  NO_UPSTREAM_NODE, \
+  UNKNOWN, \
+  "", \
+  "", \
+  "", \
+  DEFAULT_PRIORITY, \
+  true, \
+  false, \
+  false, \
+  InvalidXLogRecPtr \
+}
+
+/*
+ * Struct to store replication slot information
+ */
+
+typedef struct s_replication_slot
+{
+	char slot_name[MAXLEN];
+    char slot_type[MAXLEN];
+	bool active;
+}   t_replication_slot;
+
+
+
+PGconn *_establish_db_connection(const char *conninfo,
+								 const bool exit_on_error,
+								 const bool log_notice,
+								 const bool verbose_only);
 PGconn *establish_db_connection(const char *conninfo,
-						const bool exit_on_error);
+								const bool exit_on_error);
+PGconn *establish_db_connection_quiet(const char *conninfo);
+PGconn *test_db_connection(const char *conninfo);
 PGconn *establish_db_connection_by_params(const char *keywords[],
 								  const char *values[],
 								  const bool exit_on_error);
+bool		begin_transaction(PGconn *conn);
+bool		commit_transaction(PGconn *conn);
+bool		rollback_transaction(PGconn *conn);
 bool		check_cluster_schema(PGconn *conn);
 int			is_standby(PGconn *conn);
 bool		is_pgup(PGconn *conn, int timeout);
@@ -42,7 +105,7 @@ int			guc_set(PGconn *conn, const char *parameter, const char *op,
 			const char *value);
 int			guc_set_typed(PGconn *conn, const char *parameter, const char *op,
 			  const char *value, const char *datatype);
-
+bool		get_conninfo_value(const char *conninfo, const char *keyword, char *output);
 PGconn     *get_upstream_connection(PGconn *standby_conn, char *cluster,
 									int node_id,
 									int *upstream_node_id_ptr,
@@ -54,15 +117,23 @@ int			wait_connection_availability(PGconn *conn, long long timeout);
 bool		cancel_query(PGconn *conn, int timeout);
 char       *get_repmgr_schema(void);
 char       *get_repmgr_schema_quoted(PGconn *conn);
-bool		create_replication_slot(PGconn *conn, char *slot_name);
-
+bool		create_replication_slot(PGconn *conn, char *slot_name, int server_version_num);
+int			get_slot_record(PGconn *conn, char *slot_name, t_replication_slot *record);
+bool		drop_replication_slot(PGconn *conn, char *slot_name);
 bool		start_backup(PGconn *conn, char *first_wal_segment, bool fast_checkpoint);
 bool		stop_backup(PGconn *conn, char *last_wal_segment);
 bool		set_config_bool(PGconn *conn, const char *config_param, bool state);
-bool		copy_configuration(PGconn *masterconn, PGconn *witnessconn, char *cluster_name);
-bool		create_node_record(PGconn *conn, char *action, int node, char *type, int upstream_node, char *cluster_name, char *node_name, char *conninfo, int priority, char *slot_name);
+bool		witness_copy_node_records(PGconn *masterconn, PGconn *witnessconn, char *cluster_name);
+bool		create_node_record(PGconn *conn, char *action, int node, char *type, int upstream_node, char *cluster_name, char *node_name, char *conninfo, int priority, char *slot_name, bool active);
 bool		delete_node_record(PGconn *conn, int node, char *action);
+int			get_node_record(PGconn *conn, char *cluster, int node_id, t_node_info *node_info);
+int			get_node_record_by_name(PGconn *conn, char *cluster, const char *node_name, t_node_info *node_info);
+bool        update_node_record_status(PGconn *conn, char *cluster_name, int this_node_id, char *type, int upstream_node_id, bool active);
+bool        update_node_record_set_upstream(PGconn *conn, char *cluster_name, int this_node_id, int new_upstream_node_id);
 bool        create_event_record(PGconn *conn, t_configuration_options *options, int node_id, char *event, bool successful, char *details);
 
-
+int		    get_node_replication_state(PGconn *conn, char *node_name, char *output);
+t_server_type parse_node_type(const char *type);
+int			get_data_checksum_version(const char *data_directory);
 #endif
+

debian/DEBIAN/control

@@ -1,9 +1,9 @@
 Package: repmgr-auto
-Version: 2.0beta2
+Version: 3.1.3
 Section: database
 Priority: optional
 Architecture: all
-Depends: rsync, postgresql-9.0 | postgresql-9.1 | postgresql-9.2 | postgresql-9.3 | postgresql-9.4
-Maintainer: Jaime Casanova <jaime@2ndQuadrant.com>
+Depends: rsync, postgresql-9.3 | postgresql-9.4 | postgresql-9.5
+Maintainer: Self built package <user@localhost>
 Description: PostgreSQL replication setup, magament and monitoring
  has two main executables

debian/repmgr.repmgrd.default

@@ -12,7 +12,7 @@ REPMGRD_ENABLED=no
 #REPMGRD_USER=postgres
 
 # repmgrd binary
-#REPMGR_BIN=/usr/bin/repmgr
+#REPMGRD_BIN=/usr/bin/repmgrd
 
 # pid file
-#REPMGR_PIDFILE=/var/run/repmgrd.pid
+#REPMGRD_PIDFILE=/var/run/repmgrd.pid

debian/repmgr.repmgrd.init

@@ -59,7 +59,7 @@ do_stop()
 	#   0 if daemon has been stopped
 	#   1 if daemon was already stopped
 	#   other if daemon could not be stopped or a failure occurred
-	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $REPMGRD_PIDFILE --exec $REPMGRD_BIN
+	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $REPMGRD_PIDFILE --name "$(basename $REPMGRD_BIN)"
 }
 
 case "$1" in

dirmod.c

@@ -0,0 +1,194 @@
+/*
+ *
+ * dirmod.c
+ *	  directory handling functions
+ *
+ * Copyright (C) 2ndQuadrant, 2010-2016
+ *
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "postgres_fe.h"
+
+/* Don't modify declarations in system headers */
+
+#include <unistd.h>
+#include <dirent.h>
+#include <sys/stat.h>
+
+/*
+ * pgfnames
+ *
+ * return a list of the names of objects in the argument directory.  Caller
+ * must call pgfnames_cleanup later to free the memory allocated by this
+ * function.
+ */
+char	  **
+pgfnames(const char *path)
+{
+	DIR		   *dir;
+	struct dirent *file;
+	char	  **filenames;
+	int			numnames = 0;
+	int			fnsize = 200;	/* enough for many small dbs */
+
+	dir = opendir(path);
+	if (dir == NULL)
+	{
+		return NULL;
+	}
+
+	filenames = (char **) palloc(fnsize * sizeof(char *));
+
+	while (errno = 0, (file = readdir(dir)) != NULL)
+	{
+		if (strcmp(file->d_name, ".") != 0 && strcmp(file->d_name, "..") != 0)
+		{
+			if (numnames + 1 >= fnsize)
+			{
+				fnsize *= 2;
+				filenames = (char **) repalloc(filenames,
+											   fnsize * sizeof(char *));
+			}
+			filenames[numnames++] = pstrdup(file->d_name);
+		}
+	}
+
+	if (errno)
+	{
+		fprintf(stderr, _("could not read directory \"%s\": %s\n"),
+				path, strerror(errno));
+	}
+
+	filenames[numnames] = NULL;
+
+	if (closedir(dir))
+	{
+		fprintf(stderr, _("could not close directory \"%s\": %s\n"),
+				path, strerror(errno));
+	}
+
+	return filenames;
+}
+
+
+/*
+ *	pgfnames_cleanup
+ *
+ *	deallocate memory used for filenames
+ */
+void
+pgfnames_cleanup(char **filenames)
+{
+	char	  **fn;
+
+	for (fn = filenames; *fn; fn++)
+		pfree(*fn);
+
+	pfree(filenames);
+}
+
+
+/*
+ *	rmtree
+ *
+ *	Delete a directory tree recursively.
+ *	Assumes path points to a valid directory.
+ *	Deletes everything under path.
+ *	If rmtopdir is true deletes the directory too.
+ *	Returns true if successful, false if there was any problem.
+ *	(The details of the problem are reported already, so caller
+ *	doesn't really have to say anything more, but most do.)
+ */
+bool
+rmtree(const char *path, bool rmtopdir)
+{
+	bool		result = true;
+	char		pathbuf[MAXPGPATH];
+	char	  **filenames;
+	char	  **filename;
+	struct stat statbuf;
+
+	/*
+	 * we copy all the names out of the directory before we start modifying
+	 * it.
+	 */
+	filenames = pgfnames(path);
+
+	if (filenames == NULL)
+		return false;
+
+	/* now we have the names we can start removing things */
+	for (filename = filenames; *filename; filename++)
+	{
+		snprintf(pathbuf, MAXPGPATH, "%s/%s", path, *filename);
+
+		/*
+		 * It's ok if the file is not there anymore; we were just about to
+		 * delete it anyway.
+		 *
+		 * This is not an academic possibility. One scenario where this
+		 * happens is when bgwriter has a pending unlink request for a file in
+		 * a database that's being dropped. In dropdb(), we call
+		 * ForgetDatabaseFsyncRequests() to flush out any such pending unlink
+		 * requests, but because that's asynchronous, it's not guaranteed that
+		 * the bgwriter receives the message in time.
+		 */
+		if (lstat(pathbuf, &statbuf) != 0)
+		{
+			if (errno != ENOENT)
+			{
+				result = false;
+			}
+			continue;
+		}
+
+		if (S_ISDIR(statbuf.st_mode))
+		{
+			/* call ourselves recursively for a directory */
+			if (!rmtree(pathbuf, true))
+			{
+				/* we already reported the error */
+				result = false;
+			}
+		}
+		else
+		{
+			if (unlink(pathbuf) != 0)
+			{
+				if (errno != ENOENT)
+				{
+					result = false;
+				}
+			}
+		}
+	}
+
+	if (rmtopdir)
+	{
+		if (rmdir(path) != 0)
+		{
+			result = false;
+		}
+	}
+
+	pgfnames_cleanup(filenames);
+
+	return result;
+}
+

dirmod.h

@@ -0,0 +1,23 @@
+/*
+ * dirmod.h
+ * 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef _DIRMOD_H_
+#define _DIRMOD_H_
+
+#endif

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
@@ -29,11 +29,14 @@
 #define ERR_DB_CON 6
 #define ERR_DB_QUERY 7
 #define ERR_PROMOTED 8
-#define ERR_BAD_PASSWORD 9
 #define ERR_STR_OVERFLOW 10
 #define ERR_FAILOVER_FAIL 11
 #define ERR_BAD_SSH 12
 #define ERR_SYS_FAILURE 13
 #define ERR_BAD_BASEBACKUP 14
+#define ERR_INTERNAL 15
+#define ERR_MONITORING_FAIL 16
+#define ERR_BAD_BACKUP_LABEL 17
+#define ERR_SWITCHOVER_FAIL 18
 
 #endif   /* _ERRCODE_H_ */

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)
  *
@@ -39,13 +39,38 @@
 
 /* #define REPMGR_DEBUG */
 
-void
+static int	detect_log_facility(const char *facility);
+static void _stderr_log_with_level(const char *level_name, int level, const char *fmt, va_list ap)
+__attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 0)));
+
+int			log_type = REPMGR_STDERR;
+int			log_level = LOG_NOTICE;
+int			last_log_level = LOG_NOTICE;
+int			verbose_logging = false;
+int			terse_logging = false;
+
+extern void
 stderr_log_with_level(const char *level_name, int level, const char *fmt, ...)
+{
+	va_list		arglist;
+
+	va_start(arglist, fmt);
+	_stderr_log_with_level(level_name, level, fmt, arglist);
+	va_end(arglist);
+}
+
+static void
+_stderr_log_with_level(const char *level_name, int level, const char *fmt, va_list ap)
 {
 	time_t		t;
 	struct tm  *tm;
 	char		buff[100];
-	va_list		ap;
+
+	/*
+	 * Store the requested level so that if there's a subsequent
+	 * log_hint(), we can suppress that if appropriate.
+	 */
+	last_log_level = level;
 
 	if (log_level >= level)
 	{
@@ -54,24 +79,74 @@ stderr_log_with_level(const char *level_name, int level, const char *fmt, ...)
 		strftime(buff, 100, "[%Y-%m-%d %H:%M:%S]", tm);
 		fprintf(stderr, "%s [%s] ", buff, level_name);
 
-		va_start(ap, fmt);
 		vfprintf(stderr, fmt, ap);
-		va_end(ap);
 
 		fflush(stderr);
 	}
 }
 
+void
+log_hint(const char *fmt, ...)
+{
+	va_list		ap;
 
-static int	detect_log_level(const char *level);
-static int	detect_log_facility(const char *facility);
+	if (terse_logging == false)
+	{
+		va_start(ap, fmt);
+		_stderr_log_with_level("HINT", last_log_level, fmt, ap);
+		va_end(ap);
+	}
+}
+
+
+void
+log_verbose(int level, const char *fmt, ...)
+{
+	va_list		ap;
+
+	va_start(ap, fmt);
+
+	if (verbose_logging == true)
+	{
+		switch(level)
+		{
+			case LOG_EMERG:
+				_stderr_log_with_level("EMERG", level, fmt, ap);
+				break;
+			case LOG_ALERT:
+				_stderr_log_with_level("ALERT", level, fmt, ap);
+				break;
+			case LOG_CRIT:
+				_stderr_log_with_level("CRIT", level, fmt, ap);
+				break;
+			case LOG_ERR:
+				_stderr_log_with_level("ERR", level, fmt, ap);
+				break;
+			case LOG_WARNING:
+				_stderr_log_with_level("WARNING", level, fmt, ap);
+				break;
+			case LOG_NOTICE:
+				_stderr_log_with_level("NOTICE", level, fmt, ap);
+				break;
+			case LOG_INFO:
+				_stderr_log_with_level("INFO", level, fmt, ap);
+				break;
+			case LOG_DEBUG:
+				_stderr_log_with_level("DEBUG", level, fmt, ap);
+				break;
+		}
+	}
+
+	va_end(ap);
+}
 
-int			log_type = REPMGR_STDERR;
-int			log_level = LOG_NOTICE;
 
 bool
-logger_init(t_configuration_options * opts, const char *ident, const char *level, const char *facility)
+logger_init(t_configuration_options *opts, const char *ident)
 {
+	char	   *level = opts->loglevel;
+	char	   *facility = opts->logfacility;
+
 	int			l;
 	int			f;
 
@@ -95,10 +170,10 @@ logger_init(t_configuration_options * opts, const char *ident, const char *level
 		printf("Assigned level for logger: %d\n", l);
 #endif
 
-		if (l > 0)
+		if (l >= 0)
 			log_level = l;
 		else
-			stderr_log_warning(_("Cannot detect log level %s (use any of DEBUG, INFO, NOTICE, WARNING, ERR, ALERT, CRIT or EMERG)\n"), level);
+			stderr_log_warning(_("Invalid log level \"%s\" (available values: DEBUG, INFO, NOTICE, WARNING, ERR, ALERT, CRIT or EMERG)\n"), level);
 	}
 
 	if (facility && *facility)
@@ -144,19 +219,39 @@ logger_init(t_configuration_options * opts, const char *ident, const char *level
 	{
 		FILE	   *fd;
 
-		fd = freopen(opts->logfile, "a", stderr);
+		/* Check if we can write to the specified file before redirecting
+		 * stderr - if freopen() fails, stderr output will vanish into
+		 * the ether and the user won't know what's going on.
+		 */
 
+		fd = fopen(opts->logfile, "a");
 		if (fd == NULL)
 		{
-			fprintf(stderr, "error reopening stderr to '%s': %s",
-					opts->logfile, strerror(errno));
+			stderr_log_err(_("Unable to open specified logfile '%s' for writing: %s\n"), opts->logfile, strerror(errno));
+			stderr_log_err(_("Terminating\n"));
+			exit(ERR_BAD_CONFIG);
+		}
+		fclose(fd);
+
+		stderr_log_notice(_("Redirecting logging output to '%s'\n"), opts->logfile);
+		fd = freopen(opts->logfile, "a", stderr);
+
+		/* It's possible freopen() may still fail due to e.g. a race condition;
+		   as it's not feasible to restore stderr after a failed freopen(),
+		   we'll write to stdout as a last resort.
+		 */
+		if (fd == NULL)
+		{
+			printf(_("Unable to open specified logfile %s for writing: %s\n"), opts->logfile, strerror(errno));
+			printf(_("Terminating\n"));
+			exit(ERR_BAD_CONFIG);
 		}
 	}
 
 	return true;
-
 }
 
+
 bool
 logger_shutdown(void)
 {
@@ -169,17 +264,32 @@ logger_shutdown(void)
 }
 
 /*
- * Set a minimum logging level.  Intended for command line verbosity
- * options, which might increase requested logging over what's specified
- * in the regular configuration file.
+ * Indicate whether extra-verbose logging is required. This will
+ * generate a lot of output, particularly debug logging, and should
+ * not be permanently enabled in production.
+ *
+ * NOTE: in previous repmgr versions, this option forced the log
+ * level to INFO.
  */
 void
-logger_min_verbose(int minimum)
+logger_set_verbose(void)
 {
-	if (log_level < minimum)
-		log_level = minimum;
+	verbose_logging = true;
 }
 
+
+/*
+ * Indicate whether some non-critical log messages can be omitted.
+ * Currently this includes warnings about irrelevant command line
+ * options and hints.
+ */
+
+void logger_set_terse(void)
+{
+	terse_logging = true;
+}
+
+
 int
 detect_log_level(const char *level)
 {
@@ -200,17 +310,16 @@ detect_log_level(const char *level)
 	if (!strcmp(level, "EMERG"))
 		return LOG_EMERG;
 
-	return 0;
+	return -1;
 }
 
-int
+static int
 detect_log_facility(const char *facility)
 {
 	int			local = 0;
 
 	if (!strncmp(facility, "LOCAL", 5) && strlen(facility) == 6)
 	{
-
 		local = atoi(&facility[5]);
 
 		switch (local)

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
@@ -25,7 +25,7 @@
 #define REPMGR_SYSLOG 1
 #define REPMGR_STDERR 2
 
-void
+extern void
 stderr_log_with_level(const char *level_name, int level, const char *fmt,...)
 __attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 4)));
 
@@ -112,15 +112,25 @@ __attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 4)));
 #endif
 
 
+int			detect_log_level(const char *level);
+
 /* Logger initialisation and shutdown */
+
+bool		logger_init(t_configuration_options * opts, const char *ident);
+
 bool		logger_shutdown(void);
 
-bool logger_init(t_configuration_options * opts, const char *ident,
-			const char *level, const char *facility);
+void		logger_set_verbose(void);
+void		logger_set_terse(void);
 
-void		logger_min_verbose(int minimum);
+void		log_hint(const char *fmt, ...)
+__attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2)));
+void		log_verbose(int level, const char *fmt, ...)
+__attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 3)));
 
 extern int	log_type;
 extern int	log_level;
+extern int	verbose_logging;
+extern int	terse_logging;
 
-#endif
+#endif /* _REPMGR_LOG_H_ */

repmgr.conf.sample

@@ -2,23 +2,42 @@
 # Replication Manager sample configuration file
 ###################################################
 
+# Some configuration items will be set with a default value; this
+# is noted for each item. Where no default value is shown, the
+# parameter will be treated as empty or false.
+
 # Required configuration items
 # ============================
 #
 # repmgr and repmgrd require these items to be configured:
 
-# Cluster name
-cluster=test
+# Cluster name - this will be used by repmgr to generate its internal
+# schema (pattern: "repmgr_{cluster}"); while this name will be quoted
+# to preserve case, we recommend using lower case and avoiding whitespace
+# to facilitate easier querying of the repmgr views and tables.
+#cluster=example_cluster
 
 # Node ID and name
 # (Note: we recommend to avoid naming nodes after their initial
-#  replication funcion, as this will cause confusion when e.g.
-#  "standby2" is promoted to master)
-node=2
-node_name=node2
+#  replication function, as this will cause confusion when e.g.
+#  "standby2" is promoted to primary)
+#node=2           # a unique integer
+#node_name=node2  # an arbitrary (but unique) string; we recommend using
+                 # the server's hostname or another identifier unambiguously
+                 # associated with the server to avoid confusion
 
-# Database connection information
-conninfo='host=192.168.204.104 dbname=repmgr_db user=repmgr_usr'
+# Database connection information as a conninfo string
+# This must be accessible to all servers in the cluster; for details see:
+#
+#   https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
+#
+#conninfo='host=192.168.204.104 dbname=repmgr_db user=repmgr_usr'
+#
+# If repmgrd is in use, consider explicitly setting `connect_timeout` in the
+# conninfo string to determine the length of time which elapses before
+# a network connection attempt is abandoned; for details see:
+#
+#   https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNECT-CONNECT-TIMEOUT
 
 # Optional configuration items
 # ============================
@@ -26,33 +45,34 @@ conninfo='host=192.168.204.104 dbname=repmgr_db user=repmgr_usr'
 # Replication settings
 # ---------------------
 
-# when using cascading replication and a standby is to be connected to an
-# upstream standby, specify that node's ID with 'upstream_node'. The node
-# must exist before the new standby can be registered. If a standby is
-# to connect directly to a master node, this parameter is not required.
-#
-# upstream_node=1
+# When using cascading replication, a standby can connect to another
+# upstream standby node which is specified by setting 'upstream_node'.
+# In that case, the upstream node must exist before the new standby
+# can be registered. If 'upstream_node' is not set, then the standby
+# will connect directly to the primary node.
+#upstream_node=1
 
-# physical replication slots - PostgreSQL 9.4 and later only
+# use physical replication slots - PostgreSQL 9.4 and later only
 # (default: 0)
-#
-# use_replication_slots=0
+#use_replication_slots=0
 
+# NOTE: 'max_replication_slots' should be configured for at least the
+# number of standbys which will connect to the primary.
 
 # Logging and monitoring settings
 # -------------------------------
 
 # Log level: possible values are DEBUG, INFO, NOTICE, WARNING, ERR, ALERT, CRIT or EMERG
 # (default: NOTICE)
-loglevel=NOTICE
+#loglevel=NOTICE
 
 # Logging facility: possible values are STDERR or - for Syslog integration - one of LOCAL0, LOCAL1, ..., LOCAL7, USER
 # (default: STDERR)
-logfacility=STDERR
+#logfacility=STDERR
 
 # stderr can be redirected to an arbitrary file:
 #
-# logfile='/var/log/repmgr.log'
+#logfile='/var/log/repmgr/repmgr.log'
 
 # event notifications can be passed to an arbitrary external program
 # together with the following parameters:
@@ -66,12 +86,12 @@ logfacility=STDERR
 # the values provided for "%t" and "%d" will probably contain spaces,
 # so should be quoted in the provided command configuration, e.g.:
 #
-# event_notification_command='/path/to/some/script %n %e %s "%t" "%d"'
+#event_notification_command='/path/to/some/script %n %e %s "%t" "%d"'
 
 # By default, all notifications will be passed; the notification types
 # can be filtered to explicitly named ones:
 #
-# event_notifications=master_register,standby_register,witness_create
+#event_notifications=master_register,standby_register,witness_create
 
 
 # Environment/command settings
@@ -79,17 +99,40 @@ logfacility=STDERR
 
 # path to PostgreSQL binary directory (location of pg_ctl, pg_basebackup etc.)
 # (if not provided, defaults to system $PATH)
-# pg_bindir=/usr/bin/
+#pg_bindir=/usr/bin/
+
+# service control commands
+#
+# repmgr provides options to to override the default pg_ctl commands
+# used to stop, start  and restart the PostgreSQL cluster
+#
+# NOTE: These commands must be runnable on remote nodes as well for switchover
+# to function correctly.
+#
+# If you use sudo, the user repmgr runs as (usually 'postgres')  must have
+# passwordless sudo access to execute the command
+#
+# For example, to use systemd, you may use the following configuration:
+#
+#    # this is required when running sudo over ssh without -t:
+#    Defaults:postgres !requiretty
+#    postgres ALL = NOPASSWD: /usr/bin/systemctl stop postgresql-9.5, \
+#       /usr/bin/systemctl start postgresql-9.5, \
+#       /usr/bin/systemctl restart postgresql-9.5
+#
+# start_command = systemctl start postgresql-9.5
+# stop_command = systemctl stop postgresql-9.5
+# restart_command = systemctl restart postgresql-9.5
 
 # external command options
 
-# rsync_options=--archive --checksum --compress --progress --rsh="ssh -o \"StrictHostKeyChecking no\""
-# ssh_options=-o "StrictHostKeyChecking no"
+#rsync_options=--archive --checksum --compress --progress --rsh="ssh -o \"StrictHostKeyChecking no\""
+#ssh_options=-o "StrictHostKeyChecking no"
 
-# external command arguments
+# external command arguments. Values shown are examples.
 
-# pg_ctl_options='-s'
-# pg_basebackup_options='--xlog-method=s'
+#pg_ctl_options='-s'
+#pg_basebackup_options='--xlog-method=s'
 
 
 # Standby clone settings
@@ -101,34 +144,52 @@ logfacility=STDERR
 #
 # tablespace_mapping=/path/to/original/tablespace=/path/to/new/tablespace
 
+# You can specify a restore_command to be used in the recovery.conf that
+# will be placed in the cloned standby
+#
+# restore_command = cp /path/to/archived/wals/%f %p
 
 # Failover settings (repmgrd)
 # ---------------------------
 #
-# These settings are only applied when repmgrd is running.
+# These settings are only applied when repmgrd is running. Values shown
+# are defaults.
 
-# How many seconds we wait for master response before declaring master failure
-master_response_timeout=60
+# Number of seconds to wait for a response from the primary server before
+# deciding it has failed.
 
-# How many time we try to reconnect to master before starting failover procedure
-reconnect_attempts=6
-reconnect_interval=10
+#master_response_timeout=60
+
+# Number of attempts at what interval (in seconds) to try and
+# connect to  a server to establish its status (e.g. master
+# during failover)
+#reconnect_attempts=6
+#reconnect_interval=10
 
 # Autofailover options
-failover=automatic  # one of 'automatic', 'manual'
-priority=100        # a value of zero or less prevents the node being promoted to master
-promote_command='repmgr standby promote -f /path/to/repmgr.conf'
-follow_command='repmgr standby follow -f /path/to/repmgr.conf -W'
+#failover=manual    # one of 'automatic', 'manual' (default: manual)
+                    # defines the action to take in the event of upstream failure
+                    #
+                    # 'automatic': repmgrd will automatically attempt to promote the
+                    #    node or follow the new upstream node
+                    # 'manual': repmgrd will take no action and the mode will require
+                    #    manual attention to reattach it to replication
 
-# monitoring interval; default is 2s
-#
-# monitor_interval_secs=2
+#priority=100       # indicate a preferred priorty for promoting nodes
+                    # a value of zero or less prevents the node being promoted to primary
+                    # (default: 100)
 
-# change wait time for master; before we bail out and exit when the master
+#promote_command='repmgr standby promote -f /path/to/repmgr.conf'
+#follow_command='repmgr standby follow -f /path/to/repmgr.conf -W'
+
+# monitoring interval in seconds; default is 2
+#monitor_interval_secs=2
+
+# change wait time for primary; before we bail out and exit when the primary
 # disappears, we wait 'reconnect_attempts' * 'retry_promote_interval_secs'
 # seconds; by default this would be half an hour, as 'retry_promote_interval_secs'
 # default value is 300)
-#
-# retry_promote_interval_secs=300
-
+#retry_promote_interval_secs=300
 
+# Number of seconds after which the witness server resyncs the repl_nodes table
+#witness_repl_nodes_sync_interval_secs=15

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
@@ -20,45 +20,42 @@
 #ifndef _REPMGR_H_
 #define _REPMGR_H_
 
-#include "postgres_fe.h"
-#include "libpq-fe.h"
-
-
-#include "getopt_long.h"
+#include <libpq-fe.h>
+#include <postgres_fe.h>
+#include <getopt_long.h>
 
 #include "strutil.h"
 #include "dbutils.h"
 #include "errcode.h"
 #include "config.h"
+#include "dirmod.h"
 
 #define MIN_SUPPORTED_VERSION		"9.3"
 #define MIN_SUPPORTED_VERSION_NUM	90300
 
-#include "config.h"
-#define MAXFILENAME		1024
 #define ERRBUFF_SIZE	512
 
-#define DEFAULT_CONFIG_FILE		"./repmgr.conf"
 #define DEFAULT_WAL_KEEP_SEGMENTS	"5000"
 #define DEFAULT_DEST_DIR		"."
-#define DEFAULT_MASTER_PORT		"5432"
-#define DEFAULT_DBNAME			"postgres"
 #define DEFAULT_REPMGR_SCHEMA_PREFIX	"repmgr_"
 #define DEFAULT_PRIORITY		100
 #define FAILOVER_NODES_MAX_CHECK 50
 
 #define MANUAL_FAILOVER		0
 #define AUTOMATIC_FAILOVER	1
+#define NODE_NOT_FOUND      -1
 #define NO_UPSTREAM_NODE	-1
+#define UNKNOWN_NODE_ID     -1
 
-
-typedef enum {
-    UNKNOWN = 0,
-	MASTER,
-	STANDBY,
-	WITNESS
-} t_server_type;
-
+#define OPT_HELP                         1
+#define OPT_CHECK_UPSTREAM_CONFIG        2
+#define OPT_RECOVERY_MIN_APPLY_DELAY     3
+#define OPT_IGNORE_EXTERNAL_CONFIG_FILES 4
+#define OPT_CONFIG_ARCHIVE_DIR           5
+#define OPT_PG_REWIND                    6
+#define OPT_PWPROMPT                     7
+#define OPT_CSV                          8
+#define OPT_INITDB_NO_PWPROMPT           9
 
 
 /* Run time options type */
@@ -68,44 +65,60 @@ typedef struct
 	char		dbname[MAXLEN];
 	char		host[MAXLEN];
 	char		username[MAXLEN];
-	char		dest_dir[MAXFILENAME];
-	char		config_file[MAXFILENAME];
+	char		dest_dir[MAXPGPATH];
+	char		config_file[MAXPGPATH];
 	char		remote_user[MAXLEN];
 	char		superuser[MAXLEN];
 	char		wal_keep_segments[MAXLEN];
 	bool		verbose;
+	bool		terse;
 	bool		force;
 	bool		wait_for_master;
 	bool		ignore_rsync_warn;
-	bool		initdb_no_pwprompt;
+	bool		witness_pwprompt;
 	bool		rsync_only;
 	bool		fast_checkpoint;
 	bool		ignore_external_config_files;
+	bool		csv_mode;
 	char		masterport[MAXLEN];
-	char		localport[MAXLEN];
+	/*
+	 * configuration file parameters which can be overridden on the
+	 * command line
+	 */
+	char		loglevel[MAXLEN];
 
+	/* parameter used by STANDBY SWITCHOVER */
+	char		remote_config_file[MAXLEN];
+	char		pg_rewind[MAXPGPATH];
+	char		pg_ctl_mode[MAXLEN];
+	/* parameter used by STANDBY {ARCHIVE_CONFIG | RESTORE_CONFIG} */
+	char		config_archive_dir[MAXLEN];
 	/* parameter used by CLUSTER CLEANUP */
 	int			keep_history;
 
 	char		pg_bindir[MAXLEN];
 
 	char		recovery_min_apply_delay[MAXLEN];
+
+	/* deprecated command line options */
+	char            localport[MAXLEN];
 }	t_runtime_options;
 
-#define T_RUNTIME_OPTIONS_INITIALIZER { "", "", "", "", "", "", "", DEFAULT_WAL_KEEP_SEGMENTS, false, false, false, false, false, false, false, false, "", "", 0, "", "" }
+#define T_RUNTIME_OPTIONS_INITIALIZER { "", "", "", "", "", "", "", DEFAULT_WAL_KEEP_SEGMENTS, false, false, false, false, false, false, false, false, false, false, "", "", "", "", "fast", "", 0, "", "", ""}
+
+struct BackupLabel
+{
+	XLogRecPtr start_wal_location;
+	char start_wal_file[MAXLEN];
+	XLogRecPtr checkpoint_location;
+	char backup_from[MAXLEN];
+	char backup_method[MAXLEN];
+	char start_time[MAXLEN];
+	char label[MAXLEN];
+	XLogRecPtr min_failover_slot_lsn;
+};
 
 extern char		repmgr_schema[MAXLEN];
-
-typedef struct ErrorListCell
-{
-	struct ErrorListCell *next;
-	char			     *error_message;
-} ErrorListCell;
-
-typedef struct ErrorList
-{
-	ErrorListCell *head;
-	ErrorListCell *tail;
-} ErrorList;
+extern bool		config_file_found;
 
 #endif

repmgr.sql

@@ -1,7 +1,7 @@
 /*
  * repmgr.sql
  *
- * Copyright (C) 2ndQuadrant, 2010-2015
+ * Copyright (C) 2ndQuadrant, 2010-2016
  *
  */
 
@@ -59,3 +59,12 @@ WHERE (standby_node, last_monitor_time) IN (SELECT standby_node, MAX(last_monito
 ALTER VIEW repl_status OWNER TO repmgr;
 
 CREATE INDEX idx_repl_status_sort ON repl_monitor(last_monitor_time, standby_node);
+
+/*
+ * This view shows the list of nodes with the information of which one is the upstream
+ * in each case (when appliable)
+ */
+CREATE VIEW repl_show_nodes AS 
+SELECT rn.id, rn.conninfo, rn.type, rn.name, rn.cluster,
+	rn.priority, rn.active, sq.name AS upstream_node_name
+FROM repl_nodes as rn LEFT JOIN repl_nodes AS sq ON sq.id=rn.upstream_node_id;

sql/Makefile

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

sql/repmgr2_repmgr3.sql

@@ -63,6 +63,15 @@ UPDATE repl_nodes SET type = 'master' WHERE id = $master_id;
 
 -- UPDATE repl_nodes SET active = FALSE WHERE id IN (...);
 
+/* There's also an event table which we need to create */
+CREATE TABLE repl_events (
+  node_id          INTEGER NOT NULL,
+  event            TEXT NOT NULL,
+  successful       BOOLEAN NOT NULL DEFAULT TRUE,
+  event_timestamp  TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  details          TEXT NULL
+);
+
 /* When you're sure of your changes, commit them */
 
 -- COMMIT;

sql/repmgr3.0_repmgr3.1.sql

@@ -0,0 +1,35 @@
+/*
+ * Update a repmgr 3.0 installation to repmgr 3.1
+ * ----------------------------------------------
+ *
+ * The new repmgr package should be installed first. Then
+ * carry out these steps:
+ *
+ *   1. (If repmgrd is used) stop any running repmgrd instances
+ *   2. On the master node, execute the SQL statements listed below
+ *   3. (If repmgrd is used) restart repmgrd
+ */
+
+/*
+ * If your repmgr installation is not included in your repmgr
+ * user's search path, please set the search path to the name
+ * of the repmgr schema to ensure objects are installed in
+ * the correct location.
+ *
+ * The repmgr schema is  "repmgr_" + the cluster name defined in
+ * 'repmgr.conf'.
+ */
+
+-- SET search_path TO 'name_of_repmgr_schema';
+
+BEGIN;
+
+-- New view "repl_show_nodes" which also displays the server's
+-- upstream node
+
+CREATE VIEW repl_show_nodes AS
+SELECT rn.id, rn.conninfo, rn.type, rn.name, rn.cluster,
+	rn.priority, rn.active, sq.name AS upstream_node_name
+FROM repl_nodes as rn LEFT JOIN repl_nodes AS sq ON sq.id=rn.upstream_node_id;
+
+COMMIT;

sql/repmgr3.1.1_repmgr3.1.2.sql

@@ -0,0 +1,32 @@
+/*
+ * Update a repmgr 3.1.1 installation to repmgr 3.1.2
+ * --------------------------------------------------
+ *
+ * This update is only required if repmgrd is being used in conjunction
+ * with a witness server.
+ *
+ * The new repmgr package should be installed first. Then
+ * carry out these steps:
+ *
+ *   1. (If repmgrd is used) stop any running repmgrd instances
+ *   2. On the master node, execute the SQL statement listed below
+ *   3. (If repmgrd is used) restart repmgrd
+ */
+
+/*
+ * If your repmgr installation is not included in your repmgr
+ * user's search path, please set the search path to the name
+ * of the repmgr schema to ensure objects are installed in
+ * the correct location.
+ *
+ * The repmgr schema is  "repmgr_" + the cluster name defined in
+ * 'repmgr.conf'.
+ */
+
+-- SET search_path TO 'name_of_repmgr_schema';
+
+BEGIN;
+
+ALTER TABLE repl_nodes DROP CONSTRAINT repl_nodes_upstream_node_id_fkey,
+      ADD CONSTRAINT repl_nodes_upstream_node_id_fkey FOREIGN KEY (upstream_node_id) REFERENCES repl_nodes(id) DEFERRABLE;
+COMMIT;

sql/repmgr_funcs.c

@@ -83,7 +83,12 @@ _PG_init(void)
 	 * resources in repmgr_shmem_startup().
 	 */
 	RequestAddinShmemSpace(repmgr_memsize());
+
+#if (PG_VERSION_NUM >= 90600)
+	RequestNamedLWLockTranche("repmgr", 1);
+#else
 	RequestAddinLWLocks(1);
+#endif
 
 	/*
 	 * Install hooks.
@@ -128,7 +133,11 @@ repmgr_shmem_startup(void)
 	if (!found)
 	{
 		/* First time through ... */
+#if (PG_VERSION_NUM >= 90600)
+		shared_state->lock = &(GetNamedLWLockTranche("repmgr"))->lock;
+#else
 		shared_state->lock = LWLockAssign();
+#endif
 		snprintf(shared_state->location,
 				 sizeof(shared_state->location), "%X/%X", 0, 0);
 	}

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
@@ -24,12 +24,17 @@
 #include <stdlib.h>
 #include "errcode.h"
 
+
 #define QUERY_STR_LEN	8192
 #define MAXLEN			1024
 #define MAXLINELENGTH	4096
 #define MAXVERSIONSTR	16
 #define MAXCONNINFO		1024
 
+/* Why? http://stackoverflow.com/a/5459929/398670 */
+#define STR(x) CppAsString(x)
+
+#define MAXLEN_STR STR(MAXLEN)
 
 extern int
 xsnprintf(char *str, size_t size, const char *format,...)

uninstall_repmgr.sql

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

version.h

@@ -1,6 +1,6 @@
 #ifndef _VERSION_H_
 #define _VERSION_H_
 
-#define REPMGR_VERSION "3.0dev"
+#define REPMGR_VERSION "3.1.5"
 
 #endif