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@@ -1,4 +1,4 @@
|
||||
Copyright (c) 2010-2012, 2ndQuadrant Limited
|
||||
Copyright (c) 2010-2014, 2ndQuadrant Limited
|
||||
All rights reserved.
|
||||
|
||||
This program is free software: you can redistribute it and/or modify
|
||||
|
||||
4
CREDITS
4
CREDITS
@@ -10,3 +10,7 @@ Hannu Krosing <hannu@2ndQuadrant.com>
|
||||
Cédric Villemain <cedric@2ndquadrant.com>
|
||||
Charles Duffy <charles@dyfis.net>
|
||||
Daniel Farina <daniel@heroku.com>
|
||||
Shawn Ellis <shawn.ellis17@gmail.com>
|
||||
Jay Taylor <jay@jaytaylor.com>
|
||||
Christian Kruse <christian@2ndQuadrant.com>
|
||||
Krzysztof Gajdemski <songo@debian.org.pl>
|
||||
|
||||
39
HISTORY
39
HISTORY
@@ -1,5 +1,38 @@
|
||||
2.0beta 2012-07-27
|
||||
Make CLONE command try to make an exact copy including $PGDATA location (Cedric)
|
||||
2.0.2 2015-02-17
|
||||
Add "--checksum" in rsync when using "--force" (Jaime)
|
||||
Use createdb/createuser instead of psql (Jaime)
|
||||
Fixes to witness creation and monitoring (wamonite)
|
||||
Use default master port if none supplied (Martín)
|
||||
Documentation fixes and improvements (Ian)
|
||||
|
||||
2.0.1 2014-07-16
|
||||
Documentation fixes and new QUICKSTART file (Ian)
|
||||
Explicitly specify directories to ignore when cloning (Ian)
|
||||
Fix log level for some log messages (Ian)
|
||||
RHEL/CentOS specfile, init script and Makefile fixes (Nathan Van Overloop)
|
||||
Debian init script and config file documentation fixes (József Kószó)
|
||||
Typo fixes (Riegie Godwin Jeyaranchen, PriceChild)
|
||||
|
||||
2.0stable 2014-01-30
|
||||
Documentation fixes (Christian)
|
||||
General refactoring, code quality improvements and stabilization work (Christian)
|
||||
Added proper daemonizing (-d/--daemonize) (Christian)
|
||||
Added PID file handling (-p/--pid-file) (Christian)
|
||||
New config option: monitor_interval_secs (Christian)
|
||||
New config option: retry_promote_interval (Christian)
|
||||
New config option: logfile (Christian)
|
||||
New config option: pg_bindir (Christian)
|
||||
New config option: pgctl_options (Christian)
|
||||
|
||||
2.0beta2 2013-12-19
|
||||
Improve autofailover logic and algorithms (Jaime, Andres)
|
||||
Ignore pg_log when cloning (Jaime)
|
||||
Add timestamps to log line in stderr (Christian)
|
||||
Correctly check wal_keep_segments (Jay Taylor)
|
||||
Add a ssh_options parameter (Jay Taylor)
|
||||
|
||||
2.0beta1 2012-07-27
|
||||
Make CLONE command try to make an exact copy including $PGDATA location (Cedric)
|
||||
Add detection of master failure (Jaime)
|
||||
Add the notion of a witness server (Jaime)
|
||||
Add autofailover capabilities (Jaime)
|
||||
@@ -26,7 +59,7 @@
|
||||
1.1.0 2011-03-09
|
||||
Make options -U, -R and -p not mandatory (Jaime)
|
||||
|
||||
1.1.0b1 2011-02-24
|
||||
1.1.0b1 2011-02-24
|
||||
Fix missing "--force" option in help (Greg Smith)
|
||||
Correct warning message for wal_keep_segments (Bas van Oostveen)
|
||||
Add Debian build/usage docs (Bas, Hannu Krosing, Cedric Villemain)
|
||||
|
||||
28
Makefile
28
Makefile
@@ -1,6 +1,6 @@
|
||||
#
|
||||
# Makefile
|
||||
# Copyright (c) 2ndQuadrant, 2010-2012
|
||||
# Copyright (c) 2ndQuadrant, 2010-2014
|
||||
|
||||
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
|
||||
@@ -21,7 +21,8 @@ repmgr: $(repmgr_OBJS)
|
||||
$(CC) $(CFLAGS) $(repmgr_OBJS) $(PG_LIBS) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o repmgr
|
||||
|
||||
ifdef USE_PGXS
|
||||
PGXS := $(shell pg_config --pgxs)
|
||||
PG_CONFIG = pg_config
|
||||
PGXS := $(shell $(PG_CONFIG) --pgxs)
|
||||
include $(PGXS)
|
||||
else
|
||||
subdir = contrib/repmgr
|
||||
@@ -32,11 +33,27 @@ endif
|
||||
|
||||
# XXX: Try to use PROGRAM construct (see pgxs.mk) someday. Right now
|
||||
# is overriding pgxs install.
|
||||
install:
|
||||
$(INSTALL_PROGRAM) repmgrd$(X) '$(DESTDIR)$(bindir)'
|
||||
$(INSTALL_PROGRAM) repmgr$(X) '$(DESTDIR)$(bindir)'
|
||||
install: install_prog install_ext
|
||||
|
||||
install_prog:
|
||||
mkdir -p '$(DESTDIR)$(bindir)'
|
||||
$(INSTALL_PROGRAM) repmgrd$(X) '$(DESTDIR)$(bindir)/'
|
||||
$(INSTALL_PROGRAM) repmgr$(X) '$(DESTDIR)$(bindir)/'
|
||||
|
||||
install_ext:
|
||||
$(MAKE) -C sql install
|
||||
|
||||
install_rhel:
|
||||
mkdir -p '$(DESTDIR)/etc/init.d/'
|
||||
$(INSTALL_PROGRAM) RHEL/repmgrd.init '$(DESTDIR)/etc/init.d/repmgrd'
|
||||
mkdir -p '$(DESTDIR)/etc/sysconfig/'
|
||||
$(INSTALL_PROGRAM) RHEL/repmgrd.sysconfig '$(DESTDIR)/etc/sysconfig/repmgrd'
|
||||
mkdir -p '$(DESTDIR)/etc/repmgr/'
|
||||
$(INSTALL_PROGRAM) repmgr.conf.sample '$(DESTDIR)/etc/repmgr/'
|
||||
mkdir -p '$(DESTDIR)/usr/bin/'
|
||||
$(INSTALL_PROGRAM) repmgrd$(X) '$(DESTDIR)/usr/bin/'
|
||||
$(INSTALL_PROGRAM) repmgr$(X) '$(DESTDIR)/usr/bin/'
|
||||
|
||||
ifneq (,$(DATA)$(DATA_built))
|
||||
@for file in $(addprefix $(srcdir)/, $(DATA)) $(DATA_built); do \
|
||||
echo "$(INSTALL_DATA) $$file '$(DESTDIR)$(datadir)/$(datamoduledir)'"; \
|
||||
@@ -62,3 +79,4 @@ deb: repmgrd repmgr
|
||||
mv debian.deb ../postgresql-repmgr-9.0_1.0.0.deb
|
||||
rm -rf ./debian/usr
|
||||
|
||||
|
||||
|
||||
292
QUICKSTART.md
Normal file
292
QUICKSTART.md
Normal file
@@ -0,0 +1,292 @@
|
||||
repmgr: Quickstart guide
|
||||
========================
|
||||
|
||||
repmgr is an open-source tool suite for mananaging replication and failover
|
||||
among multiple PostgreSQL server nodes. It enhances PostgreSQL's built-in
|
||||
hot-standby capabilities with a set of administration tools for monitoring
|
||||
replication, setting up standby servers and performing failover/switchover
|
||||
operations.
|
||||
|
||||
This quickstart guide assumes you are familiar with PostgreSQL replication
|
||||
setup and Linux/UNIX system administration. For a more detailed tutorial
|
||||
covering setup on a variety of different systems, see the README.rst file.
|
||||
|
||||
Conceptual Overview
|
||||
-------------------
|
||||
|
||||
repmgr provides two binaries:
|
||||
|
||||
- `repmgr`: a command-line client to manage replication and repmgr configuration
|
||||
- `repmgrd`: an optional daemon process which runs on standby nodes to monitor
|
||||
replication and node status
|
||||
|
||||
Each PostgreSQL node requires a repmgr configuration file; additionally
|
||||
it must be "registered" using the repmgr command-line client. repmgr stores
|
||||
information about managed nodes in a custom schema on the node's current master
|
||||
database.
|
||||
|
||||
|
||||
Requirements
|
||||
------------
|
||||
|
||||
repmgr works with PostgreSQL 9.0 and later. All server nodes must be running the
|
||||
same PostgreSQL major version, and preferably should be running the same minor
|
||||
version.
|
||||
|
||||
repmgr will work on any Linux or UNIX-like environment capable of running
|
||||
PostgreSQL. rsync must also be installed.
|
||||
|
||||
|
||||
Installation
|
||||
------------
|
||||
|
||||
repmgr must be installed on each PostgreSQL server node.
|
||||
|
||||
* Packages
|
||||
- RPM packages for RedHat-based distributions are available from PGDG
|
||||
- Debian/Ubuntu provide .deb packages.
|
||||
|
||||
It is also possible to build .deb packages directly from the repmgr source;
|
||||
see README.rst for further details.
|
||||
|
||||
* Source installation
|
||||
- repmgr source code is hosted at github (https://github.com/2ndQuadrant/repmgr);
|
||||
tar.gz files can be downloaded from https://github.com/2ndQuadrant/repmgr/releases .
|
||||
|
||||
repmgr can be built easily using PGXS:
|
||||
|
||||
sudo make USE_PGXS=1 install
|
||||
|
||||
|
||||
Configuration
|
||||
-------------
|
||||
|
||||
### Server configuration
|
||||
|
||||
Password-less SSH logins must be enabled for the database system user (typically `postgres`)
|
||||
between all server nodes to enable repmgr to copy required files.
|
||||
|
||||
### PostgreSQL configuration
|
||||
|
||||
The master PostgreSQL node needs to be configured for replication with the
|
||||
following settings:
|
||||
|
||||
wal_level = 'hot_standby' # minimal, archive, hot_standby, or logical
|
||||
archive_mode = on # allows archiving to be done
|
||||
archive_command = 'cd .' # command to use to archive a logfile segment
|
||||
max_wal_senders = 10 # max number of walsender processes
|
||||
wal_keep_segments = 5000 # in logfile segments, 16MB each; 0 disables
|
||||
hot_standby = on # "on" allows queries during recovery
|
||||
|
||||
Note that repmgr expects a default of 5000 wal_keep_segments, although this
|
||||
value can be overridden when executing the `repmgr` client.
|
||||
|
||||
Additionally, repmgr requires a dedicated PostgreSQL superuser account
|
||||
and a database in which to store monitoring and replication data. The repmgr
|
||||
user account will also be used for replication connections from the standby,
|
||||
so a seperate replication user with the `REPLICATION` privilege is not required.
|
||||
The database can in principle be any database, including the default `postgres`
|
||||
one, however it's probably advisable to create a dedicated database for repmgr
|
||||
usage.
|
||||
|
||||
|
||||
### repmgr configuration
|
||||
|
||||
Each PostgreSQL node requires a repmgr configuration file containing
|
||||
identification and database connection information:
|
||||
|
||||
cluster=test
|
||||
node=1
|
||||
node_name=node1
|
||||
conninfo='host=repmgr_node1 user=repmgr_usr dbname=repmgr_db'
|
||||
pg_bindir=/path/to/postgres/bin
|
||||
|
||||
* `cluster`: common name for the replication cluster; this must be the same on all nodes
|
||||
* `node`: a unique, abitrary integer identifier
|
||||
* `name`: a unique, human-readable name
|
||||
* `conninfo`: a standard conninfo string enabling repmgr to connect to the
|
||||
control database; user and name must be the same on all nodes, while other
|
||||
parameters such as port may differ. The `host` parameter *must* be a hostname
|
||||
resolvable by all nodes on the cluster.
|
||||
* `pg_bindir`: (optional) location of PostgreSQL binaries, if not in the default $PATH
|
||||
|
||||
Note that the configuration file should not be stored inside the PostgreSQL
|
||||
data directory.
|
||||
|
||||
Each node configuration needs to be registered with repmgr, either using the
|
||||
repmgr command line tool, or the repmgrd daemon; for details see below. Details
|
||||
about each node are inserted into the repmgr database (for details see below).
|
||||
|
||||
|
||||
Replication setup and monitoring
|
||||
--------------------------------
|
||||
|
||||
For the purposes of this guide, we'll assume the database user will be
|
||||
`repmgr_usr` and the database will be `repmgr_db`, and that the following
|
||||
environment variables are set on each node:
|
||||
|
||||
- $HOME: the PostgreSQL system user's home directory
|
||||
- $PGDATA: the PostgreSQL data directory
|
||||
|
||||
|
||||
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 $HOME/repmgr/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
|
||||
|
||||
3. Register the master node with repmgr:
|
||||
|
||||
$ repmgr -f $HOME/repmgr/repmgr.conf --verbose master register
|
||||
[2014-07-04 10:43:42] [INFO] repmgr mgr connecting to master database
|
||||
[2014-07-04 10:43:42] [INFO] repmgr connected to master, checking its state
|
||||
[2014-07-04 10:43:42] [INFO] master register: creating database objects inside the repmgr_test schema
|
||||
[2014-07-04 10:43:43] [NOTICE] Master node correctly registered for cluster test with id 1 (conninfo: host=localhost user=repmgr_usr dbname=repmgr_db)
|
||||
|
||||
|
||||
Slave/standby setup
|
||||
-------------------
|
||||
|
||||
1. Use repmgr to clone the master:
|
||||
|
||||
$ repmgr -f $HOME/repmgr/repmgr.conf -D $PGDATA -d repmgr_db -U repmgr_usr -R postgres --verbose standby clone 192.168.1.2
|
||||
Opening configuration file: ./repmgr.conf
|
||||
[2014-07-04 10:49:00] [ERROR] Did not find the configuration file './repmgr.conf', continuing
|
||||
[2014-07-04 10:49:00] [INFO] repmgr connecting to master database
|
||||
[2014-07-04 10:49:00] [INFO] repmgr connected to master, checking its state
|
||||
[2014-07-04 10:49:00] [INFO] Successfully connected to primary. Current installation size is 1807 MB
|
||||
[2014-07-04 10:49:00] [NOTICE] Starting backup...
|
||||
[2014-07-04 10:49:00] [INFO] creating directory "/path/to/data/"...
|
||||
(...)
|
||||
[2014-07-04 10:53:19] [NOTICE] Finishing backup...
|
||||
NOTICE: pg_stop_backup complete, all required WAL segments have been archived
|
||||
[2014-07-04 10:53:21] [INFO] repmgr requires primary to keep WAL files 0000000100000000000000AD until at least 0000000100000000000000AD
|
||||
[2014-07-04 10:53:21] [NOTICE] repmgr standby clone complete
|
||||
[2014-07-04 10:53:21] [NOTICE] HINT: You can now start your postgresql server
|
||||
[2014-07-04 10:53:21] [NOTICE] for example : /etc/init.d/postgresql start
|
||||
|
||||
-R is the database system user on the master node. 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 $HOME/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 master node with repmgr:
|
||||
|
||||
$ repmgr -f $HOME/repmgr/repmgr.conf --verbose standby register
|
||||
Opening configuration file: /path/to/repmgr/repmgr.conf
|
||||
[2014-07-04 11:48:13] [INFO] repmgr connecting to standby database
|
||||
[2014-07-04 11:48:13] [INFO] repmgr connected to standby, checking its state
|
||||
[2014-07-04 11:48:13] [INFO] repmgr connecting to master database
|
||||
[2014-07-04 11:48:13] [INFO] finding node list for cluster 'test'
|
||||
[2014-07-04 11:48:13] [INFO] checking role of cluster node 'host=repmgr_node1 user=repmgr_usr dbname=repmgr_db'
|
||||
[2014-07-04 11:48:13] [INFO] repmgr connected to master, checking its state
|
||||
[2014-07-04 11:48:13] [INFO] repmgr registering the standby
|
||||
[2014-07-04 11:48:13] [INFO] repmgr registering the standby complete
|
||||
[2014-07-04 11:48:13] [NOTICE] Standby node correctly registered for cluster test with id 2 (conninfo: host=localhost user=repmgr_usr dbname=repmgr_db)
|
||||
|
||||
Monitoring
|
||||
----------
|
||||
|
||||
`repmgrd` is a management and monitoring daemon which runs on standby nodes
|
||||
and which and can automate remote actions. It can be started simply with e.g.:
|
||||
|
||||
repmgrd -f $HOME/repmgr/repmgr.conf --verbose > $HOME/repmgr/repmgr.log 2>&1
|
||||
|
||||
or alternatively:
|
||||
|
||||
repmgrd -f $HOME/repmgr/repmgr.conf --verbose --monitoring-history > $HOME/repmgr/repmgrd.log 2>&1
|
||||
|
||||
which will track advance or lag of the replication in every standby in the
|
||||
`repl_monitor` table.
|
||||
|
||||
Example log output:
|
||||
|
||||
[2014-07-04 11:55:17] [INFO] repmgrd Connecting to database 'host=localhost user=repmgr_usr dbname=repmgr_db'
|
||||
[2014-07-04 11:55:17] [INFO] repmgrd Connected to database, checking its state
|
||||
[2014-07-04 11:55:17] [INFO] repmgrd Connecting to primary for cluster 'test'
|
||||
[2014-07-04 11:55:17] [INFO] finding node list for cluster 'test'
|
||||
[2014-07-04 11:55:17] [INFO] checking role of cluster node 'host=repmgr_node1 user=repmgr_usr dbname=repmgr_db'
|
||||
[2014-07-04 11:55:17] [INFO] repmgrd Checking cluster configuration with schema 'repmgr_test'
|
||||
[2014-07-04 11:55:17] [INFO] repmgrd Checking node 2 in cluster 'test'
|
||||
[2014-07-04 11:55:17] [INFO] Reloading configuration file and updating repmgr tables
|
||||
[2014-07-04 11:55:17] [INFO] repmgrd Starting continuous standby node monitoring
|
||||
|
||||
|
||||
Failover
|
||||
--------
|
||||
|
||||
To promote a standby to master, on the standby execute e.g.:
|
||||
|
||||
repmgr -f $HOME/repmgr/repmgr.conf --verbose standby promote
|
||||
|
||||
repmgr will attempt to connect to the current master to verify that it
|
||||
is not available (if it is, repmgr will not promote the standby).
|
||||
|
||||
Other standby servers need to be told to follow the new master with:
|
||||
|
||||
repmgr -f $HOME/repmgr/repmgr.conf --verbose standby follow
|
||||
|
||||
See file `autofailover_quick_setup.rst` for details on setting up
|
||||
automated failover.
|
||||
|
||||
|
||||
repmgr database schema
|
||||
----------------------
|
||||
|
||||
repmgr creates a small schema for its own use in the database specified in
|
||||
each node's conninfo configuration parameter. This database can in principle
|
||||
be any database. The schema name is the global `cluster` name prefixed
|
||||
with `repmgr_`, so for the example setup above the schema name is
|
||||
`repmgr_test`.
|
||||
|
||||
The schema contains two tables:
|
||||
|
||||
* `repl_nodes`
|
||||
stores information about all registered servers in the cluster
|
||||
* `repl_monitor`
|
||||
stores monitoring information about each node
|
||||
|
||||
and one view, `repl_status`, which summarizes the latest monitoring information
|
||||
for each node.
|
||||
|
||||
|
||||
42
README.rst
42
README.rst
@@ -23,7 +23,7 @@ databases as a single cluster. repmgr includes two components:
|
||||
Supported Releases
|
||||
------------------
|
||||
|
||||
repmgr works with PostgreSQL versions 9.0 and superior.
|
||||
repmgr works with PostgreSQL versions 9.0 and later.
|
||||
|
||||
There are currently no incompatibilities when upgrading repmgr from 9.0 to 9.1,
|
||||
so your 9.0 configuration will work with 9.1
|
||||
@@ -77,7 +77,7 @@ and run::
|
||||
|
||||
And if a previously failed node becomes available again, such as
|
||||
the lost node1 above, you can get it to resynchronize by only copying
|
||||
over changes made while it was down using. That hapens with what's
|
||||
over changes made while it was down. That happens with what's
|
||||
called a forced clone, which overwrites existing data rather than
|
||||
assuming it starts with an empty database directory tree::
|
||||
|
||||
@@ -131,19 +131,19 @@ If you need to remove the source code temporary files from this directory,
|
||||
that can be done like this::
|
||||
|
||||
make USE_PGXS=1 clean
|
||||
|
||||
|
||||
See below for building notes specific to RedHat Linux variants.
|
||||
|
||||
Using a full source code tree
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
In this method, the repmgr distribution is copied into the PostgreSQL source
|
||||
code tree, assumed to be at the ${postgresql_sources} for this example.
|
||||
code tree, assumed to be under ${postgresql_sources} for this example.
|
||||
The resulting subdirectory must be named ``contrib/repmgr``, without any
|
||||
version number::
|
||||
|
||||
cp repmgr.tar.gz ${postgresql_sources}/contrib
|
||||
cd ${postgresql_sources}/contrib
|
||||
cd ${postgresql_sources}/contrib
|
||||
tar xvzf repmgr-1.0.tar.gz
|
||||
cd repmgr
|
||||
make
|
||||
@@ -237,7 +237,7 @@ If you already tried to build repmgr before doing this, you'll need to do::
|
||||
|
||||
make USE_PGXS=1 clean
|
||||
|
||||
To get rid of leftover files from the wrong architecture.
|
||||
to get rid of leftover files from the wrong architecture.
|
||||
|
||||
Notes on Ubuntu, Debian or other Debian-based Builds
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
@@ -279,8 +279,8 @@ Confirm software was built correctly
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
You should now find the repmgr programs available in the subdirectory where
|
||||
the rest of your PostgreSQL installation is at. You can confirm the software
|
||||
is available by checking its version::
|
||||
the rest of your PostgreSQL binary files are located. You can confirm the
|
||||
software is available by checking its version::
|
||||
|
||||
repmgr --version
|
||||
repmgrd --version
|
||||
@@ -374,10 +374,10 @@ Usage walkthrough
|
||||
This assumes you've already followed the steps in "Installation Outline" to
|
||||
install repmgr and repmgrd on the system.
|
||||
|
||||
A normal production installation of ``repmgr`` will normally involve two
|
||||
different systems running on the same port, typically the default of 5432,
|
||||
with both using files owned by the ``postgres`` user account. This
|
||||
walkthrough assumes the following setup:
|
||||
A typical production installation of ``repmgr`` might involve two PostgreSQL
|
||||
instances on seperate servers, both running under the ``postgres`` user account
|
||||
and both using the default port (5432). This walkthrough assumes the following
|
||||
setup:
|
||||
|
||||
* A primary (master) server called "node1," running as the "postgres" user
|
||||
who is also the owner of the files. This server is operating on port 5432. This
|
||||
@@ -625,18 +625,18 @@ Now restore to the original configuration by stopping
|
||||
primary server, then bringing up "node2" as a standby with a valid
|
||||
``recovery.conf`` file.
|
||||
|
||||
Stop the "node2" server::
|
||||
Stop the "node2" server and type the following on "node1" server::
|
||||
|
||||
repmgr -f /var/lib/pgsql/repmgr/repmgr.conf standby promote
|
||||
|
||||
Now the original primary, "node1" is acting again as primary.
|
||||
Now the original primary, "node1", is acting again as primary.
|
||||
|
||||
Start the "node2" server and type this on "node1"::
|
||||
Start the "node2" server and type this on "node2"::
|
||||
|
||||
repmgr standby clone --force -h node2 -p 5432 -U postgres -R postgres --verbose
|
||||
|
||||
Verify the roles have reversed by attempting to insert a record on "node"
|
||||
and on "node1".
|
||||
Verify the roles have reversed by attempting to insert a record on "node1"
|
||||
and on "node2".
|
||||
|
||||
The servers are now again acting as primary on "node1" and standby on "node2".
|
||||
|
||||
@@ -660,7 +660,7 @@ You can usually leave out changes to the port number in this case too.
|
||||
|
||||
* A database exists on "prime" called "testdb."
|
||||
|
||||
* The Postgress installation in each of the above is defined as $PGDATA,
|
||||
* The Postgres installation in each of the above is defined as $PGDATA,
|
||||
which is represented here with ``/data/prime`` as the "prime" server and
|
||||
``/data/standby`` as the "standby" server.
|
||||
|
||||
@@ -890,7 +890,7 @@ The output from this program looks like this::
|
||||
|
||||
Configuration options:
|
||||
-D, --data-dir=DIR local directory where the files will be copied to
|
||||
-f, --config_file=PATH path to the configuration file
|
||||
-f, --config-file=PATH path to the configuration file
|
||||
-R, --remote-user=USERNAME database server username for rsync
|
||||
-w, --wal-keep-segments=VALUE minimum value for the GUC wal_keep_segments (default: 5000)
|
||||
-I, --ignore-rsync-warning ignore rsync partial transfer warning
|
||||
@@ -1014,7 +1014,7 @@ The output from this program looks like this::
|
||||
--version output version information, then exit
|
||||
--verbose output verbose activity information
|
||||
--monitoring-history track advance or lag of the replication in every standby in repl_monitor
|
||||
-f, --config_file=PATH database to connect to
|
||||
-f, --config-file=PATH path to the configuration file
|
||||
|
||||
repmgrd monitors a cluster of servers.
|
||||
|
||||
@@ -1085,7 +1085,7 @@ License and Contributions
|
||||
=========================
|
||||
|
||||
repmgr is licensed under the GPL v3. All of its code and documentation is
|
||||
Copyright 2010-2012, 2ndQuadrant Limited. See the files COPYRIGHT and LICENSE for
|
||||
Copyright 2010-2014, 2ndQuadrant Limited. See the files COPYRIGHT and LICENSE for
|
||||
details.
|
||||
|
||||
Main sponsorship of repmgr has been from 2ndQuadrant customers.
|
||||
|
||||
57
RHEL/repmgr.spec
Normal file
57
RHEL/repmgr.spec
Normal file
@@ -0,0 +1,57 @@
|
||||
Summary: repmgr
|
||||
Name: repmgr
|
||||
Version: 2.0
|
||||
Release: 2
|
||||
License: GPLv3
|
||||
Group: System Environment/Daemons
|
||||
URL: http://repmgr.org
|
||||
Packager: Nathan Van Overloop <nathan.van.overloop@nexperteam.be>
|
||||
Vendor: 2ndQuadrant Limited
|
||||
Distribution: centos
|
||||
Source0: %{name}-%{version}.tar.gz
|
||||
BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root
|
||||
|
||||
%description
|
||||
repmgr for centos6
|
||||
|
||||
%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
|
||||
* 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
|
||||
|
||||
114
RHEL/repmgrd.init
Executable file
114
RHEL/repmgrd.init
Executable file
@@ -0,0 +1,114 @@
|
||||
#!/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
|
||||
4
RHEL/repmgrd.sysconfig
Normal file
4
RHEL/repmgrd.sysconfig
Normal file
@@ -0,0 +1,4 @@
|
||||
#default sysconfig file for repmrgd
|
||||
#custom overrides can be placed here
|
||||
|
||||
REPMGRD_OPTS="-f /etc/repmgr/repmgr.conf"
|
||||
19
TODO
19
TODO
@@ -1,21 +1,18 @@
|
||||
Known issues in repmgr
|
||||
======================
|
||||
|
||||
* The check for whether ``wal_keep_segments`` is considered large enough
|
||||
does a string comparison rather than an integer one. It can give both
|
||||
false positive (setting is large enough but flagged as too small) and
|
||||
false negative (setting is too small but not noted as such) errors.
|
||||
|
||||
* When running repmgr against a remote machine, operations that start
|
||||
the database server using the ``pg_ctl`` command may accidentally
|
||||
terminate after their associated ssh session ends.
|
||||
|
||||
* After running repmgrd as a regular foreground application, hitting
|
||||
control-C causes the program to crash.
|
||||
|
||||
Planned feature improvements
|
||||
============================
|
||||
|
||||
* Before running ``pg_start_backup()``, a sanity check that there is a
|
||||
a working ssh connection to the destination would help find
|
||||
configuration errors before disturbing the database.
|
||||
* Timeline increases when promoting a standby
|
||||
|
||||
* 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
|
||||
algorithm
|
||||
|
||||
* include support for delayed standbys
|
||||
|
||||
@@ -1,213 +1,225 @@
|
||||
=====================================================
|
||||
PostgreSQL Automatic Fail-Over - User Documentation
|
||||
=====================================================
|
||||
|
||||
Automatic Failover
|
||||
==================
|
||||
|
||||
repmgr allows setups 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 hostname fully qualified of the Master server, IP 192.168.1.10
|
||||
* node2 is the hostname fully qualified of the Standby server, IP 192.168.1.11
|
||||
* witness is the hostname fully qualified of the server used for witness, IP 192.168.1.12
|
||||
|
||||
:Note: It is not recommanded to use name defining status of a server like «masterserver»,
|
||||
this is a name leading to confusion once a failover take place and the Master is
|
||||
now on the «standbyserver».
|
||||
|
||||
Summary
|
||||
-------
|
||||
|
||||
2 PostgreSQL servers are involved in the replication. Automatic fail-over need
|
||||
to vote to decide what server it should promote, thus an odd number is required
|
||||
and 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 server used for
|
||||
witness)
|
||||
2. Install repmgr in all the servers involved (including the server used for witness)
|
||||
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 server used for witness)
|
||||
6. Register Master and Standby nodes
|
||||
7. Initiate witness server
|
||||
8. Start the repmgrd daemons in all nodes
|
||||
|
||||
:Note: A complete Hight-Availability design need 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 superior.
|
||||
|
||||
Install repmgr
|
||||
--------------
|
||||
|
||||
Install repmgr following the steps in the README.
|
||||
|
||||
Configure PostreSQL
|
||||
-------------------
|
||||
|
||||
Log in 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 node2.
|
||||
|
||||
Clone the node1 (the current Master)::
|
||||
|
||||
su - postgres
|
||||
repmgr -d repmgr -U repmgr standby clone node1
|
||||
|
||||
Start the PostgreSQL server::
|
||||
|
||||
pg_ctl -D $PGDATA start
|
||||
|
||||
And check everything is fine in the server log.
|
||||
|
||||
Configure repmgr
|
||||
----------------
|
||||
|
||||
Log in 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 it is needed 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 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 failover procedure.
|
||||
* *reconnect_interval* is the amount of time between retries to reconnect to master after a failure has been detected and before start 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 node1.
|
||||
|
||||
Register the node as Master::
|
||||
|
||||
su - postgres
|
||||
repmgr -f /etc/repmgr/repmgr.conf master register
|
||||
|
||||
Log in node2.
|
||||
|
||||
Register the node as Standby::
|
||||
|
||||
su - postgres
|
||||
repmgr -f /etc/repmgr/repmgr.conf standby register
|
||||
|
||||
Initialize witness server
|
||||
-------------------------
|
||||
|
||||
Log in 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 node1
|
||||
|
||||
It needs information to connect to the master to copy the configuration of the cluster, also it needs to know where it should initialize it's own $PGDATA.
|
||||
As part of the procees it also ask for the superuser password so it can connect when needed.
|
||||
|
||||
Start the repmgrd daemons
|
||||
-------------------------
|
||||
|
||||
Log in node2 and witness.
|
||||
|
||||
su - postgres
|
||||
repmgrd -f /etc/repmgr/repmgr.conf > /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 `pidoff repmgrd`
|
||||
|
||||
TODO : -HUP configuration update is not implemented and it should check its
|
||||
configuration file against its configuration in DB, updating
|
||||
accordingly the SQL conf (especialy the failover manual or auto)
|
||||
this allow witness-standby and standby-not-promotable features
|
||||
and simpler usage of the tool ;)
|
||||
|
||||
Usage
|
||||
=====
|
||||
|
||||
The repmgr documentation is in the README file (how to build, options, etc.)
|
||||
=====================================================
|
||||
PostgreSQL Automatic Fail-Over - User Documentation
|
||||
=====================================================
|
||||
|
||||
Automatic Failover
|
||||
==================
|
||||
|
||||
repmgr allows setups 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 hostname fully qualified of the Master server, IP 192.168.1.10
|
||||
**node2**
|
||||
is the hostname fully qualified of the Standby server, IP 192.168.1.11
|
||||
**witness**
|
||||
is the hostname fully qualified of the server used for witness, IP 192.168.1.12
|
||||
|
||||
**Note:** It is not recommanded to use name defining status of a server like «masterserver»,
|
||||
this is a name leading to confusion once a failover take place and the Master is
|
||||
now on the «standbyserver».
|
||||
|
||||
Summary
|
||||
-------
|
||||
|
||||
2 PostgreSQL servers are involved in the replication. Automatic fail-over need
|
||||
to vote to decide what server it should promote, thus an odd number is required
|
||||
and 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 server used for
|
||||
witness)
|
||||
|
||||
2. Install repmgr in all the servers involved (including the server used for witness)
|
||||
|
||||
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 server used for witness)
|
||||
|
||||
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 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 node2.
|
||||
|
||||
Clone the 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 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 it is needed 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 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 failover procedure.
|
||||
**reconnect_interval**
|
||||
is the amount of time between retries to reconnect to master after a failure has been detected and before start 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 node1.
|
||||
|
||||
Register the node as Master::
|
||||
|
||||
su - postgres
|
||||
repmgr -f /etc/repmgr/repmgr.conf master register
|
||||
|
||||
Log in node2. Register it as a standby::
|
||||
|
||||
su - postgres
|
||||
repmgr -f /etc/repmgr/repmgr.conf standby register
|
||||
|
||||
Initialize witness server
|
||||
-------------------------
|
||||
|
||||
Log in 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
|
||||
|
||||
It needs information to connect to the master to copy the configuration of the cluster, also it needs to know where it should initialize it's own $PGDATA.
|
||||
As part of the procees it also ask for the superuser password so it can connect when needed.
|
||||
|
||||
Start the repmgrd daemons
|
||||
-------------------------
|
||||
|
||||
Log in node2 and witness.
|
||||
|
||||
su - postgres
|
||||
repmgrd -f /etc/repmgr/repmgr.conf > /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.)
|
||||
|
||||
147
check_dir.c
147
check_dir.c
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* check_dir.c - Directories management functions
|
||||
* Copyright (C) 2ndQuadrant, 2010-2012
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* 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
|
||||
@@ -44,9 +44,9 @@
|
||||
int
|
||||
check_dir(char *dir)
|
||||
{
|
||||
DIR *chkdir;
|
||||
struct dirent *file;
|
||||
int result = 1;
|
||||
DIR *chkdir;
|
||||
struct dirent *file;
|
||||
int result = 1;
|
||||
|
||||
errno = 0;
|
||||
|
||||
@@ -58,7 +58,7 @@ check_dir(char *dir)
|
||||
while ((file = readdir(chkdir)) != NULL)
|
||||
{
|
||||
if (strcmp(".", file->d_name) == 0 ||
|
||||
strcmp("..", file->d_name) == 0)
|
||||
strcmp("..", file->d_name) == 0)
|
||||
{
|
||||
/* skip this and parent directory */
|
||||
continue;
|
||||
@@ -71,6 +71,7 @@ check_dir(char *dir)
|
||||
}
|
||||
|
||||
#ifdef WIN32
|
||||
|
||||
/*
|
||||
* This fix is in mingw cvs (runtime/mingwex/dirent.c rev 1.4), but not in
|
||||
* released version
|
||||
@@ -82,29 +83,29 @@ check_dir(char *dir)
|
||||
closedir(chkdir);
|
||||
|
||||
if (errno != 0)
|
||||
return -1; /* some kind of I/O error? */
|
||||
return -1; /* some kind of I/O error? */
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Create directory
|
||||
* Create directory with error log message when failing
|
||||
*/
|
||||
bool
|
||||
create_directory(char *dir)
|
||||
create_dir(char *dir)
|
||||
{
|
||||
if (mkdir_p(dir, 0700) == 0)
|
||||
return true;
|
||||
|
||||
log_err(_("Could not create directory \"%s\": %s\n"),
|
||||
dir, strerror(errno));
|
||||
dir, strerror(errno));
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
bool
|
||||
set_directory_permissions(char *dir)
|
||||
set_dir_permissions(char *dir)
|
||||
{
|
||||
return (chmod(dir, 0700) != 0) ? false : true;
|
||||
}
|
||||
@@ -127,10 +128,10 @@ mkdir_p(char *path, mode_t omode)
|
||||
{
|
||||
struct stat sb;
|
||||
mode_t numask,
|
||||
oumask;
|
||||
oumask;
|
||||
int first,
|
||||
last,
|
||||
retval;
|
||||
last,
|
||||
retval;
|
||||
char *p;
|
||||
|
||||
p = path;
|
||||
@@ -149,8 +150,8 @@ mkdir_p(char *path, mode_t omode)
|
||||
return 1;
|
||||
}
|
||||
else if (p[1] == ':' &&
|
||||
((p[0] >= 'a' && p[0] <= 'z') ||
|
||||
(p[0] >= 'A' && p[0] <= 'Z')))
|
||||
((p[0] >= 'a' && p[0] <= 'z') ||
|
||||
(p[0] >= 'A' && p[0] <= 'Z')))
|
||||
{
|
||||
/* local drive */
|
||||
p += 2;
|
||||
@@ -221,16 +222,16 @@ bool
|
||||
is_pg_dir(char *dir)
|
||||
{
|
||||
const size_t buf_sz = 8192;
|
||||
char path[buf_sz];
|
||||
struct stat sb;
|
||||
int r;
|
||||
char path[buf_sz];
|
||||
struct stat sb;
|
||||
int r;
|
||||
|
||||
// test pgdata
|
||||
/* test pgdata */
|
||||
xsnprintf(path, buf_sz, "%s/PG_VERSION", dir);
|
||||
if (stat(path, &sb) == 0)
|
||||
return true;
|
||||
|
||||
// test tablespace dir
|
||||
/* test tablespace dir */
|
||||
sprintf(path, "ls %s/PG_*/ -I*", dir);
|
||||
r = system(path);
|
||||
if (r == 0)
|
||||
@@ -241,67 +242,67 @@ is_pg_dir(char *dir)
|
||||
|
||||
|
||||
bool
|
||||
create_pgdir(char *dir, bool force)
|
||||
create_pg_dir(char *dir, bool force)
|
||||
{
|
||||
bool pg_dir = false;
|
||||
bool pg_dir = false;
|
||||
|
||||
/* Check this directory could be used as a PGDATA dir */
|
||||
switch (check_dir(dir))
|
||||
{
|
||||
case 0:
|
||||
/* dir not there, must create it */
|
||||
log_info(_("creating directory \"%s\"...\n"), dir);
|
||||
case 0:
|
||||
/* dir not there, must create it */
|
||||
log_info(_("creating directory \"%s\"...\n"), dir);
|
||||
|
||||
if (!create_directory(dir))
|
||||
{
|
||||
log_err(_("couldn't create directory \"%s\"...\n"),
|
||||
dir);
|
||||
exit(ERR_BAD_CONFIG);
|
||||
}
|
||||
break;
|
||||
case 1:
|
||||
/* Present but empty, fix permissions and use it */
|
||||
log_info(_("checking and correcting permissions on existing directory %s ...\n"),
|
||||
dir);
|
||||
|
||||
if (!set_directory_permissions(dir))
|
||||
{
|
||||
log_err(_("could not change permissions of directory \"%s\": %s\n"),
|
||||
dir, strerror(errno));
|
||||
exit(ERR_BAD_CONFIG);
|
||||
}
|
||||
break;
|
||||
case 2:
|
||||
/* Present and not empty */
|
||||
log_warning(_("directory \"%s\" exists but is not empty\n"),
|
||||
dir);
|
||||
|
||||
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)
|
||||
{
|
||||
/* Let it continue */
|
||||
if (!create_dir(dir))
|
||||
{
|
||||
log_err(_("couldn't create directory \"%s\"...\n"),
|
||||
dir);
|
||||
return false;
|
||||
}
|
||||
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"));
|
||||
exit(ERR_BAD_CONFIG);
|
||||
}
|
||||
case 1:
|
||||
/* Present but empty, fix permissions and use it */
|
||||
log_info(_("checking and correcting permissions on existing directory %s ...\n"),
|
||||
dir);
|
||||
|
||||
return false;
|
||||
default:
|
||||
/* Trouble accessing directory */
|
||||
log_err(_("could not access directory \"%s\": %s\n"),
|
||||
dir, strerror(errno));
|
||||
exit(ERR_BAD_CONFIG);
|
||||
if (!set_dir_permissions(dir))
|
||||
{
|
||||
log_err(_("could not change permissions of directory \"%s\": %s\n"),
|
||||
dir, strerror(errno));
|
||||
return false;
|
||||
}
|
||||
break;
|
||||
case 2:
|
||||
/* Present and not empty */
|
||||
log_warning(_("directory \"%s\" exists but is not empty\n"),
|
||||
dir);
|
||||
|
||||
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)
|
||||
{
|
||||
/* 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"));
|
||||
return false;
|
||||
}
|
||||
|
||||
return false;
|
||||
default:
|
||||
/* Trouble accessing directory */
|
||||
log_err(_("could not access directory \"%s\": %s\n"),
|
||||
dir, strerror(errno));
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
14
check_dir.h
14
check_dir.h
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* check_dir.h
|
||||
* Copyright (c) 2ndQuadrant, 2010-2012
|
||||
* Copyright (c) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* 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
|
||||
@@ -20,11 +20,11 @@
|
||||
#ifndef _REPMGR_CHECK_DIR_H_
|
||||
#define _REPMGR_CHECK_DIR_H_
|
||||
|
||||
int mkdir_p(char *path, mode_t omode);
|
||||
int check_dir(char *dir);
|
||||
bool create_directory(char *dir);
|
||||
bool set_directory_permissions(char *dir);
|
||||
bool is_pg_dir(char *dir);
|
||||
bool create_pgdir(char *dir, bool force);
|
||||
int mkdir_p(char *path, mode_t omode);
|
||||
int check_dir(char *dir);
|
||||
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);
|
||||
|
||||
#endif
|
||||
|
||||
129
config.c
129
config.c
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* config.c - Functions to parse the config file
|
||||
* Copyright (C) 2ndQuadrant, 2010-2012
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* 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
|
||||
@@ -23,13 +23,14 @@
|
||||
#include "repmgr.h"
|
||||
|
||||
void
|
||||
parse_config(const char *config_file, t_configuration_options *options)
|
||||
parse_config(const char *config_file, t_configuration_options * options)
|
||||
{
|
||||
char *s, buff[MAXLINELENGTH];
|
||||
char name[MAXLEN];
|
||||
char value[MAXLEN];
|
||||
char *s,
|
||||
buff[MAXLINELENGTH];
|
||||
char name[MAXLEN];
|
||||
char value[MAXLEN];
|
||||
|
||||
FILE *fp = fopen (config_file, "r");
|
||||
FILE *fp = fopen(config_file, "r");
|
||||
|
||||
/* Initialize */
|
||||
memset(options->cluster_name, 0, sizeof(options->cluster_name));
|
||||
@@ -41,6 +42,9 @@ parse_config(const char *config_file, t_configuration_options *options)
|
||||
memset(options->promote_command, 0, sizeof(options->promote_command));
|
||||
memset(options->follow_command, 0, sizeof(options->follow_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->pgctl_options, 0, sizeof(options->pgctl_options));
|
||||
|
||||
/* if nothing has been provided defaults to 60 */
|
||||
options->master_response_timeout = 60;
|
||||
@@ -49,18 +53,22 @@ parse_config(const char *config_file, t_configuration_options *options)
|
||||
options->reconnect_attempts = 6;
|
||||
options->reconnect_intvl = 10;
|
||||
|
||||
options->monitor_interval_secs = 2;
|
||||
options->retry_promote_interval_secs = 300;
|
||||
|
||||
/*
|
||||
* Since some commands don't require a config file at all, not
|
||||
* having one isn't necessarily a problem.
|
||||
* Since some commands don't require a config file at all, not having one
|
||||
* isn't necessarily a problem.
|
||||
*/
|
||||
if (fp == NULL)
|
||||
{
|
||||
log_err(_("Did not find the configuration file '%s', continuing\n"), config_file);
|
||||
log_err(_("Did not find the configuration file '%s', continuing\n"),
|
||||
config_file);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Read next line */
|
||||
while ((s = fgets (buff, sizeof buff, fp)) != NULL)
|
||||
while ((s = fgets(buff, sizeof buff, fp)) != NULL)
|
||||
{
|
||||
/* Skip blank lines and comments */
|
||||
if (buff[0] == '\n' || buff[0] == '#')
|
||||
@@ -71,20 +79,23 @@ parse_config(const char *config_file, t_configuration_options *options)
|
||||
|
||||
/* Copy into correct entry in parameters struct */
|
||||
if (strcmp(name, "cluster") == 0)
|
||||
strncpy (options->cluster_name, value, MAXLEN);
|
||||
strncpy(options->cluster_name, value, MAXLEN);
|
||||
else if (strcmp(name, "node") == 0)
|
||||
options->node = atoi(value);
|
||||
else if (strcmp(name, "conninfo") == 0)
|
||||
strncpy (options->conninfo, value, MAXLEN);
|
||||
strncpy(options->conninfo, value, MAXLEN);
|
||||
else if (strcmp(name, "rsync_options") == 0)
|
||||
strncpy (options->rsync_options, value, QUERY_STR_LEN);
|
||||
strncpy(options->rsync_options, value, QUERY_STR_LEN);
|
||||
else if (strcmp(name, "ssh_options") == 0)
|
||||
strncpy(options->ssh_options, value, QUERY_STR_LEN);
|
||||
else if (strcmp(name, "loglevel") == 0)
|
||||
strncpy (options->loglevel, value, MAXLEN);
|
||||
strncpy(options->loglevel, value, MAXLEN);
|
||||
else if (strcmp(name, "logfacility") == 0)
|
||||
strncpy (options->logfacility, value, MAXLEN);
|
||||
strncpy(options->logfacility, value, MAXLEN);
|
||||
else if (strcmp(name, "failover") == 0)
|
||||
{
|
||||
char failoverstr[MAXLEN];
|
||||
char failoverstr[MAXLEN];
|
||||
|
||||
strncpy(failoverstr, value, MAXLEN);
|
||||
|
||||
if (strcmp(failoverstr, "manual") == 0)
|
||||
@@ -111,15 +122,25 @@ parse_config(const char *config_file, t_configuration_options *options)
|
||||
options->reconnect_attempts = atoi(value);
|
||||
else if (strcmp(name, "reconnect_interval") == 0)
|
||||
options->reconnect_intvl = atoi(value);
|
||||
else if (strcmp(name, "pg_bindir") == 0)
|
||||
strncpy(options->pg_bindir, value, MAXLEN);
|
||||
else if (strcmp(name, "pg_ctl_options") == 0)
|
||||
strncpy(options->pgctl_options, value, MAXLEN);
|
||||
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);
|
||||
else if (strcmp(name, "retry_promote_interval_secs") == 0)
|
||||
options->retry_promote_interval_secs = atoi(value);
|
||||
else
|
||||
log_warning(_("%s/%s: Unknown name/value pair!\n"), name, value);
|
||||
}
|
||||
|
||||
/* Close file */
|
||||
fclose (fp);
|
||||
fclose(fp);
|
||||
|
||||
/* Check config settings */
|
||||
if (strnlen(options->cluster_name, MAXLEN)==0)
|
||||
if (*options->cluster_name == '\0')
|
||||
{
|
||||
log_err(_("Cluster name is missing. Check the configuration file.\n"));
|
||||
exit(ERR_BAD_CONFIG);
|
||||
@@ -148,39 +169,48 @@ parse_config(const char *config_file, t_configuration_options *options)
|
||||
log_err(_("Reconnect intervals must be zero or greater. Check the configuration file.\n"));
|
||||
exit(ERR_BAD_CONFIG);
|
||||
}
|
||||
|
||||
if (*options->pg_bindir == '\0')
|
||||
{
|
||||
log_err(_("pg_bindir config value not found. Check the configuration file.\n"));
|
||||
exit(ERR_BAD_CONFIG);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
char *
|
||||
trim (char *s)
|
||||
trim(char *s)
|
||||
{
|
||||
/* Initialize start, end pointers */
|
||||
char *s1 = s, *s2 = &s[strlen (s) - 1];
|
||||
char *s1 = s,
|
||||
*s2 = &s[strlen(s) - 1];
|
||||
|
||||
/* Trim and delimit right side */
|
||||
while ( (isspace (*s2)) && (s2 >= s1) )
|
||||
while ((isspace(*s2)) && (s2 >= s1))
|
||||
--s2;
|
||||
*(s2+1) = '\0';
|
||||
*(s2 + 1) = '\0';
|
||||
|
||||
/* Trim left side */
|
||||
while ( (isspace (*s1)) && (s1 < s2) )
|
||||
while ((isspace(*s1)) && (s1 < s2))
|
||||
++s1;
|
||||
|
||||
/* Copy finished string */
|
||||
strcpy (s, s1);
|
||||
memmove(s, s1, s2 - s1);
|
||||
s[s2 - s1 + 1] = '\0';
|
||||
|
||||
return s;
|
||||
}
|
||||
|
||||
void
|
||||
parse_line(char *buff, char *name, char *value)
|
||||
{
|
||||
int i = 0;
|
||||
int j = 0;
|
||||
int i = 0;
|
||||
int j = 0;
|
||||
|
||||
/*
|
||||
* first we find the name of the parameter
|
||||
*/
|
||||
for ( ; i < MAXLEN; ++i)
|
||||
for (; i < MAXLEN; ++i)
|
||||
{
|
||||
if (buff[i] != '=')
|
||||
name[j++] = buff[i];
|
||||
@@ -193,7 +223,7 @@ parse_line(char *buff, char *name, char *value)
|
||||
* Now the value
|
||||
*/
|
||||
j = 0;
|
||||
for ( ++i ; i < MAXLEN; ++i)
|
||||
for (++i; i < MAXLEN; ++i)
|
||||
if (buff[i] == '\'')
|
||||
continue;
|
||||
else if (buff[i] != '\n')
|
||||
@@ -205,9 +235,9 @@ parse_line(char *buff, char *name, char *value)
|
||||
}
|
||||
|
||||
bool
|
||||
reload_configuration(char *config_file, t_configuration_options *orig_options)
|
||||
reload_config(char *config_file, t_configuration_options * orig_options)
|
||||
{
|
||||
PGconn *conn;
|
||||
PGconn *conn;
|
||||
|
||||
t_configuration_options new_options;
|
||||
|
||||
@@ -218,57 +248,57 @@ reload_configuration(char *config_file, t_configuration_options *orig_options)
|
||||
parse_config(config_file, &new_options);
|
||||
if (new_options.node == -1)
|
||||
{
|
||||
log_warning(_("\nCannot load new configuration, will keep current one.\n"));
|
||||
log_warning(_("Cannot load new configuration, will keep current one.\n"));
|
||||
return false;
|
||||
}
|
||||
|
||||
if (strcmp(new_options.cluster_name, orig_options->cluster_name) != 0)
|
||||
{
|
||||
log_warning(_("\nCannot change cluster name, will keep current configuration.\n"));
|
||||
log_warning(_("Cannot change cluster name, will keep current configuration.\n"));
|
||||
return false;
|
||||
}
|
||||
|
||||
if (new_options.node != orig_options->node)
|
||||
{
|
||||
log_warning(_("\nCannot change node number, will keep current configuration.\n"));
|
||||
log_warning(_("Cannot change node number, will keep current configuration.\n"));
|
||||
return false;
|
||||
}
|
||||
|
||||
if (new_options.node_name != orig_options->node_name)
|
||||
if (strcmp(new_options.node_name, orig_options->node_name) != 0)
|
||||
{
|
||||
log_warning(_("\nCannot change standby name, will keep current configuration.\n"));
|
||||
log_warning(_("Cannot change standby name, will keep current configuration.\n"));
|
||||
return false;
|
||||
}
|
||||
|
||||
if (new_options.failover != MANUAL_FAILOVER && new_options.failover != AUTOMATIC_FAILOVER)
|
||||
{
|
||||
log_warning(_("\nNew value for failover is not valid. Should be MANUAL or AUTOMATIC.\n"));
|
||||
log_warning(_("New value for failover is not valid. Should be MANUAL or AUTOMATIC.\n"));
|
||||
return false;
|
||||
}
|
||||
|
||||
if (new_options.master_response_timeout <= 0)
|
||||
{
|
||||
log_warning(_("\nNew value for master_response_timeout is not valid. Should be greater than zero.\n"));
|
||||
log_warning(_("New value for master_response_timeout is not valid. Should be greater than zero.\n"));
|
||||
return false;
|
||||
}
|
||||
|
||||
if (new_options.reconnect_attempts < 0)
|
||||
{
|
||||
log_warning(_("\nNew value for reconnect_attempts is not valid. Should be greater or equal than zero.\n"));
|
||||
log_warning(_("New value for reconnect_attempts is not valid. Should be greater or equal than zero.\n"));
|
||||
return false;
|
||||
}
|
||||
|
||||
if (new_options.reconnect_intvl < 0)
|
||||
{
|
||||
log_warning(_("\nNew value for reconnect_interval is not valid. Should be greater or equal than zero.\n"));
|
||||
log_warning(_("New value for reconnect_interval is not valid. Should be greater or equal than zero.\n"));
|
||||
return false;
|
||||
}
|
||||
|
||||
/* Test conninfo string */
|
||||
conn = establishDBConnection(new_options.conninfo, false);
|
||||
conn = establish_db_connection(new_options.conninfo, false);
|
||||
if (!conn || (PQstatus(conn) != CONNECTION_OK))
|
||||
{
|
||||
log_warning(_("\nconninfo string is not valid, will keep current configuration.\n"));
|
||||
log_warning(_("conninfo string is not valid, will keep current configuration.\n"));
|
||||
return false;
|
||||
}
|
||||
PQfinish(conn);
|
||||
@@ -283,19 +313,20 @@ reload_configuration(char *config_file, t_configuration_options *orig_options)
|
||||
strcpy(orig_options->promote_command, new_options.promote_command);
|
||||
strcpy(orig_options->follow_command, new_options.follow_command);
|
||||
strcpy(orig_options->rsync_options, new_options.rsync_options);
|
||||
strcpy(orig_options->ssh_options, new_options.ssh_options);
|
||||
orig_options->master_response_timeout = new_options.master_response_timeout;
|
||||
orig_options->reconnect_attempts = new_options.reconnect_attempts;
|
||||
orig_options->reconnect_intvl = new_options.reconnect_intvl;
|
||||
|
||||
/*
|
||||
* XXX These ones can change with a simple SIGHUP?
|
||||
|
||||
strcpy (orig_options->loglevel, new_options.loglevel);
|
||||
strcpy (orig_options->logfacility, new_options.logfacility);
|
||||
|
||||
logger_shutdown();
|
||||
XXX do we have progname here ?
|
||||
logger_init(progname, orig_options.loglevel, orig_options.logfacility);
|
||||
*/
|
||||
*
|
||||
* strcpy (orig_options->loglevel, new_options.loglevel); strcpy
|
||||
* (orig_options->logfacility, new_options.logfacility);
|
||||
*
|
||||
* logger_shutdown(); XXX do we have progname here ? logger_init(progname,
|
||||
* orig_options.loglevel, orig_options.logfacility);
|
||||
*/
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
48
config.h
48
config.h
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* config.h
|
||||
* Copyright (c) 2ndQuadrant, 2010-2012
|
||||
* Copyright (c) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* 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
|
||||
@@ -25,25 +25,33 @@
|
||||
|
||||
typedef struct
|
||||
{
|
||||
char cluster_name[MAXLEN];
|
||||
int node;
|
||||
char conninfo[MAXLEN];
|
||||
int failover;
|
||||
int priority;
|
||||
char node_name[MAXLEN];
|
||||
char promote_command[MAXLEN];
|
||||
char follow_command[MAXLEN];
|
||||
char loglevel[MAXLEN];
|
||||
char logfacility[MAXLEN];
|
||||
char rsync_options[QUERY_STR_LEN];
|
||||
int master_response_timeout;
|
||||
int reconnect_attempts;
|
||||
int reconnect_intvl;
|
||||
} t_configuration_options;
|
||||
char cluster_name[MAXLEN];
|
||||
int node;
|
||||
char conninfo[MAXLEN];
|
||||
int failover;
|
||||
int priority;
|
||||
char node_name[MAXLEN];
|
||||
char promote_command[MAXLEN];
|
||||
char follow_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;
|
||||
char pg_bindir[MAXLEN];
|
||||
char pgctl_options[MAXLEN];
|
||||
char logfile[MAXLEN];
|
||||
int monitor_interval_secs;
|
||||
int retry_promote_interval_secs;
|
||||
} t_configuration_options;
|
||||
|
||||
void parse_config(const char *config_file, t_configuration_options *options);
|
||||
void parse_line(char *buff, char *name, char *value);
|
||||
char *trim(char *s);
|
||||
bool reload_configuration(char *config_file, t_configuration_options *orig_options);
|
||||
#define T_CONFIGURATION_OPTIONS_INITIALIZER { "", -1, "", MANUAL_FAILOVER, -1, "", "", "", "", "", "", "", -1, -1, -1, "", "", "", 0, 0 }
|
||||
|
||||
void parse_config(const char *config_file, 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);
|
||||
|
||||
#endif
|
||||
|
||||
331
dbutils.c
331
dbutils.c
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* dbutils.c - Database connection/management functions
|
||||
* Copyright (C) 2ndQuadrant, 2010-2012
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* 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
|
||||
@@ -18,17 +18,19 @@
|
||||
*/
|
||||
|
||||
#include <unistd.h>
|
||||
#include <time.h>
|
||||
#include <sys/time.h>
|
||||
|
||||
#include "repmgr.h"
|
||||
#include "strutil.h"
|
||||
#include "log.h"
|
||||
|
||||
PGconn *
|
||||
establishDBConnection(const char *conninfo, const bool exit_on_error)
|
||||
establish_db_connection(const char *conninfo, const bool exit_on_error)
|
||||
{
|
||||
/* Make a connection to the database */
|
||||
PGconn *conn = NULL;
|
||||
char connection_string[MAXLEN];
|
||||
PGconn *conn = NULL;
|
||||
char connection_string[MAXLEN];
|
||||
|
||||
strcpy(connection_string, conninfo);
|
||||
strcat(connection_string, " fallback_application_name='repmgr'");
|
||||
@@ -38,7 +40,7 @@ establishDBConnection(const char *conninfo, const bool exit_on_error)
|
||||
if ((PQstatus(conn) != CONNECTION_OK))
|
||||
{
|
||||
log_err(_("Connection to database failed: %s\n"),
|
||||
PQerrorMessage(conn));
|
||||
PQerrorMessage(conn));
|
||||
|
||||
if (exit_on_error)
|
||||
{
|
||||
@@ -51,16 +53,17 @@ establishDBConnection(const char *conninfo, const bool exit_on_error)
|
||||
}
|
||||
|
||||
PGconn *
|
||||
establishDBConnectionByParams(const char *keywords[], const char *values[],const bool exit_on_error)
|
||||
establish_db_connection_by_params(const char *keywords[], const char *values[],
|
||||
const bool exit_on_error)
|
||||
{
|
||||
/* Make a connection to the database */
|
||||
PGconn *conn = PQconnectdbParams(keywords, values, true);
|
||||
PGconn *conn = PQconnectdbParams(keywords, values, true);
|
||||
|
||||
/* Check to see that the backend connection was successfully made */
|
||||
if ((PQstatus(conn) != CONNECTION_OK))
|
||||
{
|
||||
log_err(_("Connection to database failed: %s\n"),
|
||||
PQerrorMessage(conn));
|
||||
PQerrorMessage(conn));
|
||||
if (exit_on_error)
|
||||
{
|
||||
PQfinish(conn);
|
||||
@@ -71,25 +74,22 @@ establishDBConnectionByParams(const char *keywords[], const char *values[],const
|
||||
return conn;
|
||||
}
|
||||
|
||||
bool
|
||||
int
|
||||
is_standby(PGconn *conn)
|
||||
{
|
||||
PGresult *res;
|
||||
bool result = false;
|
||||
int result = 0;
|
||||
|
||||
res = PQexec(conn, "SELECT pg_is_in_recovery()");
|
||||
|
||||
if (PQresultStatus(res) != PGRES_TUPLES_OK)
|
||||
if (res == NULL || PQresultStatus(res) != PGRES_TUPLES_OK)
|
||||
{
|
||||
log_err(_("Can't query server mode: %s"),
|
||||
PQerrorMessage(conn));
|
||||
PQclear(res);
|
||||
PQfinish(conn);
|
||||
exit(ERR_DB_QUERY);
|
||||
PQerrorMessage(conn));
|
||||
result = -1;
|
||||
}
|
||||
|
||||
if (PQntuples(res) == 1 && strcmp(PQgetvalue(res, 0, 0), "t") == 0)
|
||||
result = true;
|
||||
else if (PQntuples(res) == 1 && strcmp(PQgetvalue(res, 0, 0), "t") == 0)
|
||||
result = 1;
|
||||
|
||||
PQclear(res);
|
||||
return result;
|
||||
@@ -97,26 +97,23 @@ is_standby(PGconn *conn)
|
||||
|
||||
|
||||
|
||||
bool
|
||||
int
|
||||
is_witness(PGconn *conn, char *schema, char *cluster, int node_id)
|
||||
{
|
||||
PGresult *res;
|
||||
bool result = false;
|
||||
int result = 0;
|
||||
char sqlquery[QUERY_STR_LEN];
|
||||
|
||||
sqlquery_snprintf(sqlquery, "SELECT witness from %s.repl_nodes where cluster = '%s' and id = %d",
|
||||
schema, cluster, node_id);
|
||||
schema, cluster, node_id);
|
||||
res = PQexec(conn, sqlquery);
|
||||
if (PQresultStatus(res) != PGRES_TUPLES_OK)
|
||||
{
|
||||
log_err(_("Can't query server mode: %s"), PQerrorMessage(conn));
|
||||
PQclear(res);
|
||||
PQfinish(conn);
|
||||
exit(ERR_DB_QUERY);
|
||||
result = -1;
|
||||
}
|
||||
|
||||
if (PQntuples(res) == 1 && strcmp(PQgetvalue(res, 0, 0), "t") == 0)
|
||||
result = true;
|
||||
else if (PQntuples(res) == 1 && strcmp(PQgetvalue(res, 0, 0), "t") == 0)
|
||||
result = 1;
|
||||
|
||||
PQclear(res);
|
||||
return result;
|
||||
@@ -128,6 +125,7 @@ bool
|
||||
is_pgup(PGconn *conn, int timeout)
|
||||
{
|
||||
char sqlquery[QUERY_STR_LEN];
|
||||
|
||||
/* Check the connection status twice in case it changes after reset */
|
||||
bool twice = false;
|
||||
|
||||
@@ -138,23 +136,24 @@ is_pgup(PGconn *conn, int timeout)
|
||||
{
|
||||
if (twice)
|
||||
return false;
|
||||
PQreset(conn); // reconnect
|
||||
PQreset(conn); /* reconnect */
|
||||
twice = true;
|
||||
}
|
||||
else
|
||||
{
|
||||
/*
|
||||
* Send a SELECT 1 just to check if the connection is OK
|
||||
*/
|
||||
CancelQuery(conn, timeout);
|
||||
* Send a SELECT 1 just to check if the connection is OK
|
||||
*/
|
||||
if (!cancel_query(conn, timeout))
|
||||
goto failed;
|
||||
if (wait_connection_availability(conn, timeout) != 1)
|
||||
goto failed;
|
||||
|
||||
sqlquery_snprintf(sqlquery, "SELECT 1");
|
||||
if (PQsendQuery(conn, sqlquery) == 0)
|
||||
{
|
||||
log_warning(_("PQsendQuery: Query could not be sent to primary. %s\n"),
|
||||
PQerrorMessage(conn));
|
||||
log_warning(_("PQsendQuery: Query could not be sent to primary. %s\n"),
|
||||
PQerrorMessage(conn));
|
||||
goto failed;
|
||||
}
|
||||
if (wait_connection_availability(conn, timeout) != 1)
|
||||
@@ -162,11 +161,15 @@ is_pgup(PGconn *conn, int timeout)
|
||||
|
||||
break;
|
||||
|
||||
failed:
|
||||
// we need to retry, because we might just have loose the connection once
|
||||
failed:
|
||||
|
||||
/*
|
||||
* we need to retry, because we might just have loose the
|
||||
* connection once
|
||||
*/
|
||||
if (twice)
|
||||
return false;
|
||||
PQreset(conn); // reconnect
|
||||
PQreset(conn); /* reconnect */
|
||||
twice = true;
|
||||
}
|
||||
}
|
||||
@@ -179,26 +182,25 @@ failed:
|
||||
* if 8 or inferior returns an empty string
|
||||
*/
|
||||
char *
|
||||
pg_version(PGconn *conn, char* major_version)
|
||||
pg_version(PGconn *conn, char *major_version)
|
||||
{
|
||||
PGresult *res;
|
||||
PGresult *res;
|
||||
|
||||
int major_version1;
|
||||
char *major_version2;
|
||||
int major_version1;
|
||||
char *major_version2;
|
||||
|
||||
res = PQexec(conn,
|
||||
"WITH pg_version(ver) AS "
|
||||
"(SELECT split_part(version(), ' ', 2)) "
|
||||
"SELECT split_part(ver, '.', 1), split_part(ver, '.', 2) "
|
||||
"FROM pg_version");
|
||||
"WITH pg_version(ver) AS "
|
||||
"(SELECT split_part(version(), ' ', 2)) "
|
||||
"SELECT split_part(ver, '.', 1), split_part(ver, '.', 2) "
|
||||
"FROM pg_version");
|
||||
|
||||
if (PQresultStatus(res) != PGRES_TUPLES_OK)
|
||||
{
|
||||
log_err(_("Version check PQexec failed: %s"),
|
||||
PQerrorMessage(conn));
|
||||
PQerrorMessage(conn));
|
||||
PQclear(res);
|
||||
PQfinish(conn);
|
||||
exit(ERR_DB_QUERY);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
major_version1 = atoi(PQgetvalue(res, 0, 0));
|
||||
@@ -208,7 +210,7 @@ pg_version(PGconn *conn, char* major_version)
|
||||
{
|
||||
/* form a major version string */
|
||||
xsnprintf(major_version, MAXVERSIONSTR, "%d.%s", major_version1,
|
||||
major_version2);
|
||||
major_version2);
|
||||
}
|
||||
else
|
||||
strcpy(major_version, "");
|
||||
@@ -219,59 +221,92 @@ pg_version(PGconn *conn, char* major_version)
|
||||
}
|
||||
|
||||
|
||||
bool
|
||||
guc_setted(PGconn *conn, const char *parameter, const char *op,
|
||||
const char *value)
|
||||
int
|
||||
guc_set(PGconn *conn, const char *parameter, const char *op,
|
||||
const char *value)
|
||||
{
|
||||
PGresult *res;
|
||||
PGresult *res;
|
||||
char sqlquery[QUERY_STR_LEN];
|
||||
int retval = 1;
|
||||
|
||||
sqlquery_snprintf(sqlquery, "SELECT true FROM pg_settings "
|
||||
" WHERE name = '%s' AND setting %s '%s'",
|
||||
parameter, op, value);
|
||||
" WHERE name = '%s' AND setting %s '%s'",
|
||||
parameter, op, value);
|
||||
|
||||
res = PQexec(conn, sqlquery);
|
||||
if (PQresultStatus(res) != PGRES_TUPLES_OK)
|
||||
{
|
||||
log_err(_("GUC setting check PQexec failed: %s"),
|
||||
PQerrorMessage(conn));
|
||||
PQclear(res);
|
||||
PQfinish(conn);
|
||||
exit(ERR_DB_QUERY);
|
||||
PQerrorMessage(conn));
|
||||
retval = -1;
|
||||
}
|
||||
if (PQntuples(res) == 0)
|
||||
else if (PQntuples(res) == 0)
|
||||
{
|
||||
PQclear(res);
|
||||
return false;
|
||||
retval = 0;
|
||||
}
|
||||
|
||||
PQclear(res);
|
||||
|
||||
return true;
|
||||
return retval;
|
||||
}
|
||||
|
||||
/**
|
||||
* Just like guc_set except with an extra parameter containing the name of
|
||||
* the pg datatype so that the comparison can be done properly.
|
||||
*/
|
||||
int
|
||||
guc_set_typed(PGconn *conn, const char *parameter, const char *op,
|
||||
const char *value, const char *datatype)
|
||||
{
|
||||
PGresult *res;
|
||||
char sqlquery[QUERY_STR_LEN];
|
||||
int retval = 1;
|
||||
|
||||
sqlquery_snprintf(sqlquery, "SELECT true FROM pg_settings "
|
||||
" WHERE name = '%s' AND setting::%s %s '%s'::%s",
|
||||
parameter, datatype, op, value, datatype);
|
||||
|
||||
res = PQexec(conn, sqlquery);
|
||||
if (PQresultStatus(res) != PGRES_TUPLES_OK)
|
||||
{
|
||||
log_err(_("GUC setting check PQexec failed: %s"),
|
||||
PQerrorMessage(conn));
|
||||
retval = -1;
|
||||
}
|
||||
else if (PQntuples(res) == 0)
|
||||
{
|
||||
retval = 0;
|
||||
}
|
||||
|
||||
PQclear(res);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
const char *
|
||||
get_cluster_size(PGconn *conn)
|
||||
{
|
||||
PGresult *res;
|
||||
const char *size;
|
||||
char sqlquery[QUERY_STR_LEN];
|
||||
PGresult *res;
|
||||
const char *size = NULL;
|
||||
char sqlquery[QUERY_STR_LEN];
|
||||
|
||||
sqlquery_snprintf(
|
||||
sqlquery,
|
||||
"SELECT pg_size_pretty(SUM(pg_database_size(oid))::bigint) "
|
||||
" FROM pg_database ");
|
||||
sqlquery,
|
||||
"SELECT pg_size_pretty(SUM(pg_database_size(oid))::bigint) "
|
||||
" FROM pg_database ");
|
||||
|
||||
res = PQexec(conn, sqlquery);
|
||||
if (PQresultStatus(res) != PGRES_TUPLES_OK)
|
||||
{
|
||||
log_err(_("Get cluster size PQexec failed: %s"),
|
||||
PQerrorMessage(conn));
|
||||
PQclear(res);
|
||||
PQfinish(conn);
|
||||
exit(ERR_DB_QUERY);
|
||||
PQerrorMessage(conn));
|
||||
}
|
||||
size = PQgetvalue(res, 0, 0);
|
||||
else
|
||||
{
|
||||
size = PQgetvalue(res, 0, 0);
|
||||
}
|
||||
|
||||
PQclear(res);
|
||||
return size;
|
||||
}
|
||||
@@ -280,23 +315,23 @@ get_cluster_size(PGconn *conn)
|
||||
* get a connection to master by reading repl_nodes, creating a connection
|
||||
* to each node (one at a time) and finding if it is a master or a standby
|
||||
*
|
||||
* NB: If master_conninfo_out may be NULL. If it is non-null, it is assumed to
|
||||
* NB: If master_conninfo_out may be NULL. If it is non-null, it is assumed to
|
||||
* point to allocated memory of MAXCONNINFO in length, and the master server
|
||||
* connection string is placed there.
|
||||
*/
|
||||
PGconn *
|
||||
getMasterConnection(PGconn *standby_conn, char *schema, char *cluster,
|
||||
int *master_id, char *master_conninfo_out)
|
||||
get_master_connection(PGconn *standby_conn, char *schema, char *cluster,
|
||||
int *master_id, char *master_conninfo_out)
|
||||
{
|
||||
PGconn *master_conn = NULL;
|
||||
PGresult *res1;
|
||||
PGresult *res2;
|
||||
char sqlquery[QUERY_STR_LEN];
|
||||
char master_conninfo_stack[MAXCONNINFO];
|
||||
char *master_conninfo = &*master_conninfo_stack;
|
||||
char schema_quoted[MAXLEN];
|
||||
PGconn *master_conn = NULL;
|
||||
PGresult *res1;
|
||||
PGresult *res2;
|
||||
char sqlquery[QUERY_STR_LEN];
|
||||
char master_conninfo_stack[MAXCONNINFO];
|
||||
char *master_conninfo = &*master_conninfo_stack;
|
||||
char schema_quoted[MAXLEN];
|
||||
|
||||
int i;
|
||||
int i;
|
||||
|
||||
/*
|
||||
* If the caller wanted to get a copy of the connection info string, sub
|
||||
@@ -311,8 +346,8 @@ getMasterConnection(PGconn *standby_conn, char *schema, char *cluster,
|
||||
* Assemble the unquoted schema name
|
||||
*/
|
||||
{
|
||||
char *identifier = PQescapeIdentifier(standby_conn, schema,
|
||||
strlen(schema));
|
||||
char *identifier = PQescapeIdentifier(standby_conn, schema,
|
||||
strlen(schema));
|
||||
|
||||
maxlen_snprintf(schema_quoted, "%s", identifier);
|
||||
PQfreemem(identifier);
|
||||
@@ -320,20 +355,19 @@ getMasterConnection(PGconn *standby_conn, char *schema, char *cluster,
|
||||
|
||||
/* find all nodes belonging to this cluster */
|
||||
log_info(_("finding node list for cluster '%s'\n"),
|
||||
cluster);
|
||||
cluster);
|
||||
|
||||
sqlquery_snprintf(sqlquery, "SELECT id, conninfo FROM %s.repl_nodes "
|
||||
" WHERE cluster = '%s' and not witness",
|
||||
schema_quoted, cluster);
|
||||
" WHERE cluster = '%s' and not witness",
|
||||
schema_quoted, cluster);
|
||||
|
||||
res1 = PQexec(standby_conn, sqlquery);
|
||||
if (PQresultStatus(res1) != PGRES_TUPLES_OK)
|
||||
{
|
||||
log_err(_("Can't get nodes info: %s\n"),
|
||||
PQerrorMessage(standby_conn));
|
||||
PQerrorMessage(standby_conn));
|
||||
PQclear(res1);
|
||||
PQfinish(standby_conn);
|
||||
exit(ERR_DB_QUERY);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
for (i = 0; i < PQntuples(res1); i++)
|
||||
@@ -342,23 +376,23 @@ getMasterConnection(PGconn *standby_conn, char *schema, char *cluster,
|
||||
*master_id = atoi(PQgetvalue(res1, i, 0));
|
||||
strncpy(master_conninfo, PQgetvalue(res1, i, 1), MAXCONNINFO);
|
||||
log_info(_("checking role of cluster node '%s'\n"),
|
||||
master_conninfo);
|
||||
master_conn = establishDBConnection(master_conninfo, false);
|
||||
master_conninfo);
|
||||
master_conn = establish_db_connection(master_conninfo, false);
|
||||
|
||||
if (PQstatus(master_conn) != CONNECTION_OK)
|
||||
continue;
|
||||
|
||||
/*
|
||||
* Can't use the is_standby() function here because on error that
|
||||
* function closes the connection passed and exits. This still
|
||||
* needs to close master_conn first.
|
||||
* function closes the connection passed and exits. This still needs
|
||||
* to close master_conn first.
|
||||
*/
|
||||
res2 = PQexec(master_conn, "SELECT pg_is_in_recovery()");
|
||||
|
||||
if (PQresultStatus(res2) != PGRES_TUPLES_OK)
|
||||
{
|
||||
log_err(_("Can't get recovery state from this node: %s\n"),
|
||||
PQerrorMessage(master_conn));
|
||||
PQerrorMessage(master_conn));
|
||||
PQclear(res2);
|
||||
PQfinish(master_conn);
|
||||
continue;
|
||||
@@ -380,14 +414,13 @@ getMasterConnection(PGconn *standby_conn, char *schema, char *cluster,
|
||||
}
|
||||
}
|
||||
|
||||
/* If we finish this loop without finding a master then
|
||||
* we doesn't have the info or the master has failed (or we
|
||||
* reached max_connections or superuser_reserved_connections,
|
||||
* anything else I'm missing?).
|
||||
/*
|
||||
* If we finish this loop without finding a master then we doesn't have
|
||||
* the info or the master has failed (or we reached max_connections or
|
||||
* superuser_reserved_connections, anything else I'm missing?).
|
||||
*
|
||||
* Probably we will need to check the error to know if we need
|
||||
* to start failover procedure or just fix some situation on the
|
||||
* standby.
|
||||
* Probably we will need to check the error to know if we need to start
|
||||
* failover procedure or just fix some situation on the standby.
|
||||
*/
|
||||
PQclear(res1);
|
||||
return NULL;
|
||||
@@ -395,52 +428,102 @@ getMasterConnection(PGconn *standby_conn, char *schema, char *cluster,
|
||||
|
||||
|
||||
/*
|
||||
* wait until current query finishes ignoring any results, this could be an async command
|
||||
* or a cancelation of a query
|
||||
* wait until current query finishes ignoring any results, this could be an
|
||||
* async command or a cancelation of a query
|
||||
* return 1 if Ok; 0 if any error ocurred; -1 if timeout reached
|
||||
*/
|
||||
int
|
||||
wait_connection_availability(PGconn *conn, int timeout)
|
||||
wait_connection_availability(PGconn *conn, long long timeout)
|
||||
{
|
||||
PGresult *res;
|
||||
fd_set read_set;
|
||||
int sock = PQsocket(conn);
|
||||
struct timeval tmout,
|
||||
before,
|
||||
after;
|
||||
struct timezone tz;
|
||||
|
||||
while(timeout-- >= 0)
|
||||
/* recalc to microseconds */
|
||||
timeout *= 1000000;
|
||||
|
||||
while (timeout > 0)
|
||||
{
|
||||
if (PQconsumeInput(conn) == 0)
|
||||
{
|
||||
log_warning(_("PQconsumeInput: Query could not be sent to primary. %s\n"),
|
||||
PQerrorMessage(conn));
|
||||
log_warning(_("wait_connection_availability: could not receive data from connection. %s\n"),
|
||||
PQerrorMessage(conn));
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
if (PQisBusy(conn) == 0)
|
||||
{
|
||||
res = PQgetResult(conn);
|
||||
if (res == NULL)
|
||||
break;
|
||||
PQclear(res);
|
||||
do
|
||||
{
|
||||
res = PQgetResult(conn);
|
||||
PQclear(res);
|
||||
} while (res != NULL);
|
||||
|
||||
break;
|
||||
}
|
||||
sleep(1);
|
||||
|
||||
|
||||
tmout.tv_sec = 0;
|
||||
tmout.tv_usec = 250000;
|
||||
|
||||
FD_ZERO(&read_set);
|
||||
FD_SET(sock, &read_set);
|
||||
|
||||
gettimeofday(&before, &tz);
|
||||
if (select(sock, &read_set, NULL, NULL, &tmout) == -1)
|
||||
{
|
||||
log_warning(
|
||||
_("wait_connection_availability: select() returned with error: %s"),
|
||||
strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
gettimeofday(&after, &tz);
|
||||
|
||||
timeout -= (after.tv_sec * 1000000 + after.tv_usec) -
|
||||
(before.tv_sec * 1000000 + before.tv_usec);
|
||||
}
|
||||
|
||||
|
||||
if (timeout >= 0)
|
||||
{
|
||||
return 1;
|
||||
else
|
||||
return -1;
|
||||
}
|
||||
|
||||
log_warning(_("wait_connection_availability: timeout reached"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
CancelQuery(PGconn *conn, int timeout)
|
||||
bool
|
||||
cancel_query(PGconn *conn, int timeout)
|
||||
{
|
||||
char errbuf[ERRBUFF_SIZE];
|
||||
PGcancel *pgcancel;
|
||||
char errbuf[ERRBUFF_SIZE];
|
||||
PGcancel *pgcancel;
|
||||
|
||||
wait_connection_availability(conn, timeout);
|
||||
if (wait_connection_availability(conn, timeout) != 1)
|
||||
return false;
|
||||
|
||||
pgcancel = PQgetCancel(conn);
|
||||
|
||||
if (!pgcancel || PQcancel(pgcancel, errbuf, ERRBUFF_SIZE) == 0)
|
||||
if (pgcancel == NULL)
|
||||
return false;
|
||||
|
||||
/*
|
||||
* PQcancel can only return 0 if socket()/connect()/send() fails, in any
|
||||
* of those cases we can assume something bad happened to the connection
|
||||
*/
|
||||
if (PQcancel(pgcancel, errbuf, ERRBUFF_SIZE) == 0)
|
||||
{
|
||||
log_warning(_("Can't stop current query: %s\n"), errbuf);
|
||||
PQfreeCancel(pgcancel);
|
||||
return false;
|
||||
}
|
||||
|
||||
PQfreeCancel(pgcancel);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
37
dbutils.h
37
dbutils.h
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* dbutils.h
|
||||
* Copyright (c) 2ndQuadrant, 2010-2012
|
||||
* Copyright (c) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* 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
|
||||
@@ -22,20 +22,25 @@
|
||||
|
||||
#include "strutil.h"
|
||||
|
||||
PGconn *establishDBConnection(const char *conninfo, const bool exit_on_error);
|
||||
PGconn *establishDBConnectionByParams(const char *keywords[],
|
||||
const char *values[],
|
||||
const bool exit_on_error);
|
||||
bool is_standby(PGconn *conn);
|
||||
bool is_witness(PGconn *conn, char *schema, char *cluster, int node_id);
|
||||
bool is_pgup(PGconn *conn, int timeout);
|
||||
char *pg_version(PGconn *conn, char* major_version);
|
||||
bool guc_setted(PGconn *conn, const char *parameter, const char *op,
|
||||
const char *value);
|
||||
const char *get_cluster_size(PGconn *conn);
|
||||
PGconn *getMasterConnection(PGconn *standby_conn, char *schema, char *cluster,
|
||||
int *master_id, char *master_conninfo_out);
|
||||
PGconn *establish_db_connection(const char *conninfo,
|
||||
const bool exit_on_error);
|
||||
PGconn *establish_db_connection_by_params(const char *keywords[],
|
||||
const char *values[],
|
||||
const bool exit_on_error);
|
||||
int is_standby(PGconn *conn);
|
||||
int is_witness(PGconn *conn, char *schema, char *cluster, int node_id);
|
||||
bool is_pgup(PGconn *conn, int timeout);
|
||||
char *pg_version(PGconn *conn, char *major_version);
|
||||
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);
|
||||
|
||||
const char *get_cluster_size(PGconn *conn);
|
||||
PGconn *get_master_connection(PGconn *standby_conn, char *schema, char *cluster,
|
||||
int *master_id, char *master_conninfo_out);
|
||||
|
||||
int wait_connection_availability(PGconn *conn, long long timeout);
|
||||
bool cancel_query(PGconn *conn, int timeout);
|
||||
|
||||
int wait_connection_availability(PGconn *conn, int timeout);
|
||||
void CancelQuery(PGconn *conn, int timeout);
|
||||
#endif
|
||||
|
||||
6
debian/DEBIAN/control
vendored
6
debian/DEBIAN/control
vendored
@@ -1,9 +1,9 @@
|
||||
Package: repmgr-auto
|
||||
Version: 1.0-1
|
||||
Version: 2.0beta2
|
||||
Section: database
|
||||
Priority: optional
|
||||
Architecture: all
|
||||
Depends: rsync, postgresql-9.0
|
||||
Maintainer: Greg Smith <greg@2ndQuadrant.com>
|
||||
Depends: rsync, postgresql-9.0 | postgresql-9.1 | postgresql-9.2 | postgresql-9.3
|
||||
Maintainer: Jaime Casanova <jaime@2ndQuadrant.com>
|
||||
Description: PostgreSQL replication setup, magament and monitoring
|
||||
has two main executables
|
||||
|
||||
18
debian/repmgr.repmgrd.default
vendored
Normal file
18
debian/repmgr.repmgrd.default
vendored
Normal file
@@ -0,0 +1,18 @@
|
||||
# default settings for repmgrd. This file is source by /bin/sh from
|
||||
# /etc/init.d/repmgrd
|
||||
|
||||
# disable repmgrd by default so it won't get started upon installation
|
||||
# valid values: yes/no
|
||||
REPMGRD_ENABLED=no
|
||||
|
||||
# Options for repmgrd (required)
|
||||
#REPMGRD_OPTS="--config-file /path/to/repmgr.conf"
|
||||
|
||||
# User to run repmgrd as
|
||||
#REPMGRD_USER=postgres
|
||||
|
||||
# repmgrd binary
|
||||
#REPMGR_BIN=/usr/bin/repmgr
|
||||
|
||||
# pid file
|
||||
#REPMGR_PIDFILE=/var/run/repmgrd.pid
|
||||
101
debian/repmgr.repmgrd.init
vendored
Normal file
101
debian/repmgr.repmgrd.init
vendored
Normal file
@@ -0,0 +1,101 @@
|
||||
#!/bin/sh
|
||||
### 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: $syslog postgresql
|
||||
# Default-Start: 2 3 4 5
|
||||
# Default-Stop: 0 1 6
|
||||
# Short-Description: Start/stop repmgrd
|
||||
# Description: Enable repmgrd replication management and monitoring daemon for PostgreSQL
|
||||
### END INIT INFO
|
||||
|
||||
set -e
|
||||
|
||||
DESC="PostgreSQL replication management and monitoring daemon"
|
||||
NAME=repmgrd
|
||||
|
||||
REPMGRD_ENABLED=no
|
||||
REPMGRD_OPTS=
|
||||
REPMGRD_USER=postgres
|
||||
REPMGRD_BIN=/usr/bin/repmgrd
|
||||
REPMGRD_PIDFILE=/var/run/repmgrd.pid
|
||||
|
||||
# Read configuration variable file if it is present
|
||||
[ -r /etc/default/$NAME ] && . /etc/default/$NAME
|
||||
|
||||
test -x $REPMGRD_BIN || exit 0
|
||||
|
||||
case "$REPMGRD_ENABLED" in
|
||||
[Yy]*)
|
||||
break
|
||||
;;
|
||||
*)
|
||||
exit 0
|
||||
;;
|
||||
esac
|
||||
|
||||
# Define LSB log_* functions.
|
||||
. /lib/lsb/init-functions
|
||||
|
||||
if [ -z "$REPMGRD_OPTS" ]
|
||||
then
|
||||
log_warning_msg "Not starting $NAME, REPMGRD_OPTS not set in /etc/default/$NAME"
|
||||
exit 0
|
||||
fi
|
||||
|
||||
do_start()
|
||||
{
|
||||
# Return
|
||||
# 0 if daemon has been started
|
||||
# 1 if daemon was already running
|
||||
# other if daemon could not be started or a failure occured
|
||||
start-stop-daemon --start --quiet --background --chuid $REPMGRD_USER --make-pidfile --pidfile $REPMGRD_PIDFILE --exec $REPMGRD_BIN -- $REPMGRD_OPTS
|
||||
}
|
||||
|
||||
do_stop()
|
||||
{
|
||||
# Return
|
||||
# 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
|
||||
}
|
||||
|
||||
case "$1" in
|
||||
start)
|
||||
log_daemon_msg "Starting $DESC" "$NAME"
|
||||
do_start
|
||||
case "$?" in
|
||||
0) log_end_msg 0 ;;
|
||||
1) log_progress_msg "already started"
|
||||
log_end_msg 0 ;;
|
||||
*) log_end_msg 1 ;;
|
||||
esac
|
||||
|
||||
;;
|
||||
stop)
|
||||
log_daemon_msg "Stopping $DESC" "$NAME"
|
||||
do_stop
|
||||
case "$?" in
|
||||
0) log_end_msg 0 ;;
|
||||
1) log_progress_msg "already stopped"
|
||||
log_end_msg 0 ;;
|
||||
*) log_end_msg 1 ;;
|
||||
esac
|
||||
|
||||
;;
|
||||
restart|force-reload)
|
||||
$0 stop
|
||||
$0 start
|
||||
;;
|
||||
status)
|
||||
status_of_proc -p $REPMGRD_PIDFILE $REPMGRD_BIN $NAME && exit 0 || exit $?
|
||||
;;
|
||||
*)
|
||||
echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload|status}" >&2
|
||||
exit 3
|
||||
;;
|
||||
esac
|
||||
|
||||
exit 0
|
||||
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* errcode.h
|
||||
* Copyright (C) 2ndQuadrant, 2010-2012
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* 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
|
||||
@@ -34,6 +34,7 @@
|
||||
#define ERR_BAD_PASSWORD 9
|
||||
#define ERR_STR_OVERFLOW 10
|
||||
#define ERR_FAILOVER_FAIL 11
|
||||
#define ERR_BAD_SSH 12
|
||||
#define ERR_BAD_SSH 12
|
||||
#define ERR_SYS_FAILURE 13
|
||||
|
||||
#endif /* _ERRCODE_H_ */
|
||||
#endif /* _ERRCODE_H_ */
|
||||
|
||||
134
log.c
134
log.c
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* log.c - Logging methods
|
||||
* Copyright (C) 2ndQuadrant, 2010-2012
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* This module is a set of methods for logging (currently only syslog)
|
||||
*
|
||||
@@ -25,9 +25,11 @@
|
||||
|
||||
#ifdef HAVE_SYSLOG
|
||||
#include <syslog.h>
|
||||
#include <stdarg.h>
|
||||
#endif
|
||||
|
||||
#include <stdarg.h>
|
||||
#include <time.h>
|
||||
|
||||
#include "log.h"
|
||||
|
||||
#define DEFAULT_IDENT "repmgr"
|
||||
@@ -37,20 +39,44 @@
|
||||
|
||||
/* #define REPMGR_DEBUG */
|
||||
|
||||
static int detect_log_level(const char* level);
|
||||
static int detect_log_facility(const char* facility);
|
||||
|
||||
int log_type = REPMGR_STDERR;
|
||||
int log_level = LOG_NOTICE;
|
||||
|
||||
bool logger_init(const char* ident, const char* level, const char* facility)
|
||||
void
|
||||
stderr_log_with_level(const char *level_name, int level, const char *fmt, ...)
|
||||
{
|
||||
time_t t;
|
||||
struct tm *tm;
|
||||
char buff[100];
|
||||
va_list ap;
|
||||
|
||||
int l;
|
||||
int f;
|
||||
if (log_level >= level)
|
||||
{
|
||||
time(&t);
|
||||
tm = localtime(&t);
|
||||
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);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int detect_log_level(const char *level);
|
||||
static int detect_log_facility(const char *facility);
|
||||
|
||||
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)
|
||||
{
|
||||
int l;
|
||||
int f;
|
||||
|
||||
#ifdef HAVE_SYSLOG
|
||||
int syslog_facility = DEFAULT_SYSLOG_FACILITY;
|
||||
int syslog_facility = DEFAULT_SYSLOG_FACILITY;
|
||||
#endif
|
||||
|
||||
#ifdef REPMGR_DEBUG
|
||||
@@ -107,21 +133,33 @@ bool logger_init(const char* ident, const char* level, const char* facility)
|
||||
|
||||
if (log_type == REPMGR_SYSLOG)
|
||||
{
|
||||
setlogmask (LOG_UPTO (log_level));
|
||||
openlog (ident, LOG_CONS | LOG_PID | LOG_NDELAY, syslog_facility);
|
||||
setlogmask(LOG_UPTO(log_level));
|
||||
openlog(ident, LOG_CONS | LOG_PID | LOG_NDELAY, syslog_facility);
|
||||
|
||||
stderr_log_notice(_("Setup syslog (level: %s, facility: %s)\n"), level, facility);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
if (*opts->logfile)
|
||||
{
|
||||
FILE *fd;
|
||||
|
||||
fd = freopen(opts->logfile, "a", stderr);
|
||||
|
||||
if (fd == NULL)
|
||||
{
|
||||
fprintf(stderr, "error reopening stderr to '%s': %s",
|
||||
opts->logfile, strerror(errno));
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
|
||||
}
|
||||
|
||||
bool logger_shutdown(void)
|
||||
bool
|
||||
logger_shutdown(void)
|
||||
{
|
||||
|
||||
#ifdef HAVE_SYSLOG
|
||||
if (log_type == REPMGR_SYSLOG)
|
||||
closelog();
|
||||
@@ -135,13 +173,15 @@ bool logger_shutdown(void)
|
||||
* options, which might increase requested logging over what's specified
|
||||
* in the regular configuration file.
|
||||
*/
|
||||
void logger_min_verbose(int minimum)
|
||||
void
|
||||
logger_min_verbose(int minimum)
|
||||
{
|
||||
if (log_level < minimum)
|
||||
log_level = minimum;
|
||||
}
|
||||
|
||||
int detect_log_level(const char* level)
|
||||
int
|
||||
detect_log_level(const char *level)
|
||||
{
|
||||
if (!strcmp(level, "DEBUG"))
|
||||
return LOG_DEBUG;
|
||||
@@ -163,40 +203,42 @@ int detect_log_level(const char* level)
|
||||
return 0;
|
||||
}
|
||||
|
||||
int detect_log_facility(const char* facility)
|
||||
int
|
||||
detect_log_facility(const char *facility)
|
||||
{
|
||||
int local = 0;
|
||||
int local = 0;
|
||||
|
||||
if (!strncmp(facility, "LOCAL", 5) && strlen(facility) == 6)
|
||||
{
|
||||
|
||||
local = atoi (&facility[5]);
|
||||
local = atoi(&facility[5]);
|
||||
|
||||
switch (local)
|
||||
{
|
||||
case 0:
|
||||
return LOG_LOCAL0;
|
||||
break;
|
||||
case 1:
|
||||
return LOG_LOCAL1;
|
||||
break;
|
||||
case 2:
|
||||
return LOG_LOCAL2;
|
||||
break;
|
||||
case 3:
|
||||
return LOG_LOCAL3;
|
||||
break;
|
||||
case 4:
|
||||
return LOG_LOCAL4;
|
||||
break;
|
||||
case 5:
|
||||
return LOG_LOCAL5;
|
||||
break;
|
||||
case 6:
|
||||
return LOG_LOCAL6;
|
||||
break;
|
||||
case 7:
|
||||
return LOG_LOCAL7;
|
||||
break;
|
||||
case 0:
|
||||
return LOG_LOCAL0;
|
||||
break;
|
||||
case 1:
|
||||
return LOG_LOCAL1;
|
||||
break;
|
||||
case 2:
|
||||
return LOG_LOCAL2;
|
||||
break;
|
||||
case 3:
|
||||
return LOG_LOCAL3;
|
||||
break;
|
||||
case 4:
|
||||
return LOG_LOCAL4;
|
||||
break;
|
||||
case 5:
|
||||
return LOG_LOCAL5;
|
||||
break;
|
||||
case 6:
|
||||
return LOG_LOCAL6;
|
||||
break;
|
||||
case 7:
|
||||
return LOG_LOCAL7;
|
||||
break;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
53
log.h
53
log.h
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* log.h
|
||||
* Copyright (c) 2ndQuadrant, 2010-2012
|
||||
* Copyright (c) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* 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
|
||||
@@ -25,15 +25,19 @@
|
||||
#define REPMGR_SYSLOG 1
|
||||
#define REPMGR_STDERR 2
|
||||
|
||||
void
|
||||
stderr_log_with_level(const char *level_name, int level, const char *fmt,...)
|
||||
__attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 4)));
|
||||
|
||||
/* Standard error logging */
|
||||
#define stderr_log_debug(...) if (log_level >= LOG_DEBUG) fprintf(stderr, __VA_ARGS__)
|
||||
#define stderr_log_info(...) if (log_level >= LOG_INFO) fprintf(stderr, __VA_ARGS__)
|
||||
#define stderr_log_notice(...) if (log_level >= LOG_NOTICE) fprintf(stderr, __VA_ARGS__)
|
||||
#define stderr_log_warning(...) if (log_level >= LOG_WARNING) fprintf(stderr, __VA_ARGS__)
|
||||
#define stderr_log_err(...) if (log_level >= LOG_ERR) fprintf(stderr, __VA_ARGS__)
|
||||
#define stderr_log_crit(...) if (log_level >= LOG_CRIT) fprintf(stderr, __VA_ARGS__)
|
||||
#define stderr_log_alert(...) if (log_level >= LOG_ALERT) fprintf(stderr, __VA_ARGS__)
|
||||
#define stderr_log_emerg(...) if (log_level >= LOG_EMERG) fprintf(stderr, __VA_ARGS__)
|
||||
#define stderr_log_debug(...) stderr_log_with_level("DEBUG", LOG_DEBUG, __VA_ARGS__)
|
||||
#define stderr_log_info(...) stderr_log_with_level("INFO", LOG_INFO, __VA_ARGS__)
|
||||
#define stderr_log_notice(...) stderr_log_with_level("NOTICE", LOG_NOTICE, __VA_ARGS__)
|
||||
#define stderr_log_warning(...) stderr_log_with_level("WARNING", LOG_WARNING, __VA_ARGS__)
|
||||
#define stderr_log_err(...) stderr_log_with_level("ERROR", LOG_ERR, __VA_ARGS__)
|
||||
#define stderr_log_crit(...) stderr_log_with_level("CRITICAL", LOG_CRIT, __VA_ARGS__)
|
||||
#define stderr_log_alert(...) stderr_log_with_level("ALERT", LOG_ALERT, __VA_ARGS__)
|
||||
#define stderr_log_emerg(...) stderr_log_with_level("EMERGENCY", LOG_EMERG, __VA_ARGS__)
|
||||
|
||||
#ifdef HAVE_SYSLOG
|
||||
|
||||
@@ -86,17 +90,16 @@
|
||||
if (log_type == REPMGR_SYSLOG) syslog(LOG_ALERT, __VA_ARGS__); \
|
||||
else stderr_log_alert(__VA_ARGS__); \
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
#define LOG_EMERG 0 /* system is unusable */
|
||||
#define LOG_ALERT 1 /* action must be taken immediately */
|
||||
#define LOG_CRIT 2 /* critical conditions */
|
||||
#define LOG_ERR 3 /* error conditions */
|
||||
#define LOG_WARNING 4 /* warning conditions */
|
||||
#define LOG_NOTICE 5 /* normal but significant condition */
|
||||
#define LOG_INFO 6 /* informational */
|
||||
#define LOG_DEBUG 7 /* debug-level messages */
|
||||
#define LOG_EMERG 0 /* system is unusable */
|
||||
#define LOG_ALERT 1 /* action must be taken immediately */
|
||||
#define LOG_CRIT 2 /* critical conditions */
|
||||
#define LOG_ERR 3 /* error conditions */
|
||||
#define LOG_WARNING 4 /* warning conditions */
|
||||
#define LOG_NOTICE 5 /* normal but significant condition */
|
||||
#define LOG_INFO 6 /* informational */
|
||||
#define LOG_DEBUG 7 /* debug-level messages */
|
||||
|
||||
#define log_debug(...) stderr_log_debug(__VA_ARGS__)
|
||||
#define log_info(...) stderr_log_info(__VA_ARGS__)
|
||||
@@ -106,16 +109,18 @@
|
||||
#define log_crit(...) stderr_log_crit(__VA_ARGS__)
|
||||
#define log_alert(...) stderr_log_alert(__VA_ARGS__)
|
||||
#define log_emerg(...) stderr_log_emerg(__VA_ARGS__)
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
/* Logger initialisation and shutdown */
|
||||
bool logger_shutdown(void);
|
||||
bool logger_init(const char* ident, const char* level, const char* facility);
|
||||
void logger_min_verbose(int minimum);
|
||||
bool logger_shutdown(void);
|
||||
|
||||
extern int log_type;
|
||||
extern int log_level;
|
||||
bool logger_init(t_configuration_options * opts, const char *ident,
|
||||
const char *level, const char *facility);
|
||||
|
||||
void logger_min_verbose(int minimum);
|
||||
|
||||
extern int log_type;
|
||||
extern int log_level;
|
||||
|
||||
#endif
|
||||
|
||||
@@ -11,7 +11,8 @@ node_name=standby2
|
||||
|
||||
# Connection information
|
||||
conninfo='host=192.168.204.104'
|
||||
rsync_options=--archive --checksum --compress --progress --rsh=ssh
|
||||
rsync_options=--archive --checksum --compress --progress --rsh="ssh -o \"StrictHostKeyChecking no\""
|
||||
ssh_options=-o "StrictHostKeyChecking no"
|
||||
|
||||
# How many seconds we wait for master response before declaring master failure
|
||||
master_response_timeout=60
|
||||
@@ -21,10 +22,10 @@ reconnect_attempts=6
|
||||
reconnect_interval=10
|
||||
|
||||
# Autofailover options
|
||||
failover=automatic
|
||||
failover=manual
|
||||
priority=-1
|
||||
promote_command='repmgr promote'
|
||||
follow_command='repmgr follow'
|
||||
promote_command='repmgr standby promote -f /path/to/repmgr.conf'
|
||||
follow_command='repmgr standby follow -f /path/to/repmgr.conf -W'
|
||||
|
||||
# Log level: possible values are DEBUG, INFO, NOTICE, WARNING, ERR, ALERT, CRIT or EMERG
|
||||
# Default: NOTICE
|
||||
@@ -33,3 +34,29 @@ loglevel=NOTICE
|
||||
# Logging facility: possible values are STDERR or - for Syslog integration - one of LOCAL0, LOCAL1, ..., LOCAL7, USER
|
||||
# Default: STDERR
|
||||
logfacility=STDERR
|
||||
|
||||
# path to pg_ctl executable
|
||||
pg_bindir=/usr/bin/
|
||||
|
||||
#
|
||||
# you may add command line arguments for pg_ctl
|
||||
#
|
||||
# pg_ctl_options='-s'
|
||||
|
||||
#
|
||||
# redirect stderr to a logfile
|
||||
#
|
||||
# logfile='/var/log/repmgr.log'
|
||||
|
||||
#
|
||||
# change monitoring interval; default is 2s
|
||||
#
|
||||
# monitor_interval_secs=2
|
||||
|
||||
#
|
||||
# change wait time for master; before we bail out and exit when the
|
||||
# master disappears, we wait 6 * retry_promote_interval_secs seconds;
|
||||
# by default this would be half an hour (since sleep_delay default
|
||||
# value is 300)
|
||||
#
|
||||
# retry_promote_interval_secs=300
|
||||
|
||||
33
repmgr.h
33
repmgr.h
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* repmgr.h
|
||||
* Copyright (c) 2ndQuadrant, 2010-2012
|
||||
* Copyright (c) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* 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
|
||||
@@ -50,24 +50,25 @@
|
||||
typedef struct
|
||||
{
|
||||
|
||||
char dbname[MAXLEN];
|
||||
char host[MAXLEN];
|
||||
char username[MAXLEN];
|
||||
char dest_dir[MAXFILENAME];
|
||||
char config_file[MAXFILENAME];
|
||||
char remote_user[MAXLEN];
|
||||
char wal_keep_segments[MAXLEN];
|
||||
bool verbose;
|
||||
bool force;
|
||||
bool ignore_rsync_warn;
|
||||
char dbname[MAXLEN];
|
||||
char host[MAXLEN];
|
||||
char username[MAXLEN];
|
||||
char dest_dir[MAXFILENAME];
|
||||
char config_file[MAXFILENAME];
|
||||
char remote_user[MAXLEN];
|
||||
char wal_keep_segments[MAXLEN];
|
||||
bool verbose;
|
||||
bool force;
|
||||
bool wait_for_master;
|
||||
bool ignore_rsync_warn;
|
||||
|
||||
char masterport[MAXLEN];
|
||||
char localport[MAXLEN];
|
||||
char masterport[MAXLEN];
|
||||
char localport[MAXLEN];
|
||||
|
||||
/* parameter used by CLUSTER CLEANUP */
|
||||
int keep_history;
|
||||
} t_runtime_options;
|
||||
int keep_history;
|
||||
} t_runtime_options;
|
||||
|
||||
#define SLEEP_MONITOR 2
|
||||
#define T_RUNTIME_OPTIONS_INITIALIZER { "", "", "", "", "", "", DEFAULT_WAL_KEEP_SEGMENTS, false, false, false, false, "", "", 0 }
|
||||
|
||||
#endif
|
||||
|
||||
@@ -1,7 +1,7 @@
|
||||
/*
|
||||
* repmgr.sql
|
||||
*
|
||||
* Copyright (C) 2ndQuadrant, 2010-2012
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
@@ -9,7 +9,8 @@ DATA=uninstall_repmgr_funcs.sql
|
||||
OBJS=repmgr_funcs.o
|
||||
|
||||
ifdef USE_PGXS
|
||||
PGXS := $(shell pg_config --pgxs)
|
||||
PG_CONFIG = pg_config
|
||||
PGXS := $(shell $(PG_CONFIG) --pgxs)
|
||||
include $(PGXS)
|
||||
else
|
||||
subdir = contrib/repmgr/sql
|
||||
|
||||
@@ -15,9 +15,10 @@
|
||||
#include "storage/shmem.h"
|
||||
#include "storage/spin.h"
|
||||
#include "utils/builtins.h"
|
||||
#include "utils/timestamp.h"
|
||||
|
||||
/* same definition as the one in xlog_internal.h */
|
||||
#define MAXFNAMELEN 64
|
||||
#define MAXFNAMELEN 64
|
||||
|
||||
PG_MODULE_MAGIC;
|
||||
|
||||
@@ -26,29 +27,36 @@ PG_MODULE_MAGIC;
|
||||
*/
|
||||
typedef struct repmgrSharedState
|
||||
{
|
||||
LWLockId lock; /* protects search/modification */
|
||||
char location[MAXFNAMELEN]; /* last known xlog location */
|
||||
} repmgrSharedState;
|
||||
LWLockId lock; /* protects search/modification */
|
||||
char location[MAXFNAMELEN]; /* last known xlog location */
|
||||
TimestampTz last_updated;
|
||||
} repmgrSharedState;
|
||||
|
||||
/* Links to shared memory state */
|
||||
static repmgrSharedState *shared_state = NULL;
|
||||
|
||||
static shmem_startup_hook_type prev_shmem_startup_hook = NULL;
|
||||
|
||||
void _PG_init(void);
|
||||
void _PG_fini(void);
|
||||
void _PG_init(void);
|
||||
void _PG_fini(void);
|
||||
|
||||
static void repmgr_shmem_startup(void);
|
||||
static Size repmgr_memsize(void);
|
||||
|
||||
static bool repmgr_set_standby_location(char *locationstr);
|
||||
|
||||
Datum repmgr_update_standby_location(PG_FUNCTION_ARGS);
|
||||
Datum repmgr_get_last_standby_location(PG_FUNCTION_ARGS);
|
||||
Datum repmgr_update_standby_location(PG_FUNCTION_ARGS);
|
||||
Datum repmgr_get_last_standby_location(PG_FUNCTION_ARGS);
|
||||
|
||||
PG_FUNCTION_INFO_V1(repmgr_update_standby_location);
|
||||
PG_FUNCTION_INFO_V1(repmgr_get_last_standby_location);
|
||||
|
||||
Datum repmgr_update_last_updated(PG_FUNCTION_ARGS);
|
||||
Datum repmgr_get_last_updated(PG_FUNCTION_ARGS);
|
||||
|
||||
PG_FUNCTION_INFO_V1(repmgr_update_last_updated);
|
||||
PG_FUNCTION_INFO_V1(repmgr_get_last_updated);
|
||||
|
||||
|
||||
/*
|
||||
* Module load callback
|
||||
@@ -60,9 +68,9 @@ _PG_init(void)
|
||||
* In order to create our shared memory area, we have to be loaded via
|
||||
* shared_preload_libraries. If not, fall out without hooking into any of
|
||||
* the main system. (We don't throw error here because it seems useful to
|
||||
* allow the repmgr functions to be created even when the
|
||||
* module isn't active. The functions must protect themselves against
|
||||
* being called then, however.)
|
||||
* allow the repmgr functions to be created even when the module isn't
|
||||
* active. The functions must protect themselves against being called
|
||||
* then, however.)
|
||||
*/
|
||||
if (!process_shared_preload_libraries_in_progress)
|
||||
return;
|
||||
@@ -112,15 +120,15 @@ repmgr_shmem_startup(void)
|
||||
LWLockAcquire(AddinShmemInitLock, LW_EXCLUSIVE);
|
||||
|
||||
shared_state = ShmemInitStruct("repmgr shared state",
|
||||
sizeof(repmgrSharedState),
|
||||
&found);
|
||||
sizeof(repmgrSharedState),
|
||||
&found);
|
||||
|
||||
if (!found)
|
||||
{
|
||||
/* First time through ... */
|
||||
shared_state->lock = LWLockAssign();
|
||||
snprintf(shared_state->location,
|
||||
sizeof(shared_state->location), "%X/%X", 0, 0);
|
||||
sizeof(shared_state->location), "%X/%X", 0, 0);
|
||||
}
|
||||
|
||||
LWLockRelease(AddinShmemInitLock);
|
||||
@@ -133,20 +141,20 @@ repmgr_shmem_startup(void)
|
||||
static Size
|
||||
repmgr_memsize(void)
|
||||
{
|
||||
return MAXALIGN(sizeof(repmgrSharedState));
|
||||
return MAXALIGN(sizeof(repmgrSharedState));
|
||||
}
|
||||
|
||||
|
||||
static bool
|
||||
repmgr_set_standby_location(char *locationstr)
|
||||
{
|
||||
/* Safety check... */
|
||||
if (!shared_state)
|
||||
return false;
|
||||
/* Safety check... */
|
||||
if (!shared_state)
|
||||
return false;
|
||||
|
||||
LWLockAcquire(shared_state->lock, LW_EXCLUSIVE);
|
||||
LWLockAcquire(shared_state->lock, LW_EXCLUSIVE);
|
||||
strncpy(shared_state->location, locationstr, MAXFNAMELEN);
|
||||
LWLockRelease(shared_state->lock);
|
||||
LWLockRelease(shared_state->lock);
|
||||
|
||||
return true;
|
||||
}
|
||||
@@ -158,7 +166,7 @@ repmgr_set_standby_location(char *locationstr)
|
||||
Datum
|
||||
repmgr_get_last_standby_location(PG_FUNCTION_ARGS)
|
||||
{
|
||||
char location[MAXFNAMELEN];
|
||||
char location[MAXFNAMELEN];
|
||||
|
||||
/* Safety check... */
|
||||
if (!shared_state)
|
||||
@@ -176,14 +184,49 @@ repmgr_get_last_standby_location(PG_FUNCTION_ARGS)
|
||||
Datum
|
||||
repmgr_update_standby_location(PG_FUNCTION_ARGS)
|
||||
{
|
||||
text *location = PG_GETARG_TEXT_P(0);
|
||||
char *locationstr;
|
||||
text *location = PG_GETARG_TEXT_P(0);
|
||||
char *locationstr;
|
||||
|
||||
/* Safety check... */
|
||||
if (!shared_state)
|
||||
PG_RETURN_BOOL(false);
|
||||
/* Safety check... */
|
||||
if (!shared_state)
|
||||
PG_RETURN_BOOL(false);
|
||||
|
||||
locationstr = text_to_cstring(location);
|
||||
locationstr = text_to_cstring(location);
|
||||
|
||||
PG_RETURN_BOOL(repmgr_set_standby_location(locationstr));
|
||||
}
|
||||
|
||||
/* update and return last updated with current timestamp */
|
||||
Datum
|
||||
repmgr_update_last_updated(PG_FUNCTION_ARGS)
|
||||
{
|
||||
TimestampTz last_updated = GetCurrentTimestamp();
|
||||
|
||||
/* Safety check... */
|
||||
if (!shared_state)
|
||||
PG_RETURN_NULL();
|
||||
|
||||
LWLockAcquire(shared_state->lock, LW_SHARED);
|
||||
shared_state->last_updated = last_updated;
|
||||
LWLockRelease(shared_state->lock);
|
||||
|
||||
PG_RETURN_TIMESTAMPTZ(last_updated);
|
||||
}
|
||||
|
||||
|
||||
/* get last updated timestamp */
|
||||
Datum
|
||||
repmgr_get_last_updated(PG_FUNCTION_ARGS)
|
||||
{
|
||||
TimestampTz last_updated;
|
||||
|
||||
/* Safety check... */
|
||||
if (!shared_state)
|
||||
PG_RETURN_NULL();
|
||||
|
||||
LWLockAcquire(shared_state->lock, LW_EXCLUSIVE);
|
||||
last_updated = shared_state->last_updated;
|
||||
LWLockRelease(shared_state->lock);
|
||||
|
||||
PG_RETURN_TIMESTAMPTZ(last_updated);
|
||||
}
|
||||
|
||||
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* repmgr_function.sql
|
||||
* Copyright (c) 2ndQuadrant, 2010
|
||||
* Copyright (c) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
*/
|
||||
|
||||
@@ -13,3 +13,11 @@ LANGUAGE C STRICT;
|
||||
CREATE FUNCTION repmgr_get_last_standby_location() RETURNS text
|
||||
AS 'MODULE_PATHNAME', 'repmgr_get_last_standby_location'
|
||||
LANGUAGE C STRICT;
|
||||
|
||||
CREATE FUNCTION repmgr_update_last_updated() RETURNS TIMESTAMP WITH TIME ZONE
|
||||
AS 'MODULE_PATHNAME', 'repmgr_update_last_updated'
|
||||
LANGUAGE C STRICT;
|
||||
|
||||
CREATE FUNCTION repmgr_get_last_updated() RETURNS TIMESTAMP WITH TIME ZONE
|
||||
AS 'MODULE_PATHNAME', 'repmgr_get_last_updated'
|
||||
LANGUAGE C STRICT;
|
||||
|
||||
@@ -1,2 +1,11 @@
|
||||
/*
|
||||
* uninstall_repmgr_funcs.sql
|
||||
* Copyright (c) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
*/
|
||||
|
||||
DROP FUNCTION repmgr_update_standby_location(text);
|
||||
DROP FUNCTION repmgr_get_last_standby_location();
|
||||
|
||||
DROP FUNCTION repmgr_update_last_updated();
|
||||
DROP FUNCTION repmgr_get_last_updated();
|
||||
|
||||
33
strutil.c
33
strutil.c
@@ -1,7 +1,7 @@
|
||||
/*
|
||||
* strutil.c
|
||||
*
|
||||
* Copyright (C) 2ndQuadrant, 2010-2012
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* 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
|
||||
@@ -25,29 +25,21 @@
|
||||
#include "log.h"
|
||||
#include "strutil.h"
|
||||
|
||||
static int xvsnprintf(char *str, size_t size, const char *format, va_list ap);
|
||||
|
||||
/* Add strnlen on platforms that don't have it, like OS X */
|
||||
#ifndef strnlen
|
||||
size_t
|
||||
strnlen(const char *s, size_t n)
|
||||
{
|
||||
const char *end = (const char *) memchr(s, '\0', n);
|
||||
return(end ? end - s : n);
|
||||
}
|
||||
#endif
|
||||
static int
|
||||
xvsnprintf(char *str, size_t size, const char *format, va_list ap)
|
||||
__attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 0)));
|
||||
|
||||
static int
|
||||
xvsnprintf(char *str, size_t size, const char *format, va_list ap)
|
||||
{
|
||||
int retval;
|
||||
int retval;
|
||||
|
||||
retval = vsnprintf(str, size, format, ap);
|
||||
|
||||
if (retval >= size)
|
||||
if (retval >= (int) size)
|
||||
{
|
||||
log_err(_("Buffer of size not large enough to format entire string '%s'\n"),
|
||||
str);
|
||||
str);
|
||||
exit(ERR_STR_OVERFLOW);
|
||||
}
|
||||
|
||||
@@ -56,10 +48,10 @@ xvsnprintf(char *str, size_t size, const char *format, va_list ap)
|
||||
|
||||
|
||||
int
|
||||
xsnprintf(char *str, size_t size, const char *format, ...)
|
||||
xsnprintf(char *str, size_t size, const char *format,...)
|
||||
{
|
||||
va_list arglist;
|
||||
int retval;
|
||||
va_list arglist;
|
||||
int retval;
|
||||
|
||||
va_start(arglist, format);
|
||||
retval = xvsnprintf(str, size, format, arglist);
|
||||
@@ -70,7 +62,7 @@ xsnprintf(char *str, size_t size, const char *format, ...)
|
||||
|
||||
|
||||
int
|
||||
sqlquery_snprintf(char *str, const char *format, ...)
|
||||
sqlquery_snprintf(char *str, const char *format,...)
|
||||
{
|
||||
va_list arglist;
|
||||
int retval;
|
||||
@@ -83,7 +75,8 @@ sqlquery_snprintf(char *str, const char *format, ...)
|
||||
}
|
||||
|
||||
|
||||
int maxlen_snprintf(char *str, const char *format, ...)
|
||||
int
|
||||
maxlen_snprintf(char *str, const char *format,...)
|
||||
{
|
||||
va_list arglist;
|
||||
int retval;
|
||||
|
||||
23
strutil.h
23
strutil.h
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* strutil.h
|
||||
* Copyright (C) 2ndQuadrant, 2010-2012
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify
|
||||
@@ -22,7 +22,7 @@
|
||||
#define _STRUTIL_H_
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <errcode.h>
|
||||
#include "errcode.h"
|
||||
|
||||
#define QUERY_STR_LEN 8192
|
||||
#define MAXLEN 1024
|
||||
@@ -31,13 +31,16 @@
|
||||
#define MAXCONNINFO 1024
|
||||
|
||||
|
||||
extern int xsnprintf(char *str, size_t size, const char *format, ...);
|
||||
extern int sqlquery_snprintf(char *str, const char *format, ...);
|
||||
extern int maxlen_snprintf(char *str, const char *format, ...);
|
||||
extern int
|
||||
xsnprintf(char *str, size_t size, const char *format,...)
|
||||
__attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 4)));
|
||||
|
||||
/* Add strnlen on platforms that don't have it, like OS X */
|
||||
#ifndef strnlen
|
||||
extern size_t strnlen(const char *s, size_t n);
|
||||
#endif
|
||||
extern int
|
||||
sqlquery_snprintf(char *str, const char *format,...)
|
||||
__attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 3)));
|
||||
|
||||
#endif /* _STRUTIL_H_ */
|
||||
extern int
|
||||
maxlen_snprintf(char *str, const char *format,...)
|
||||
__attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 3)));
|
||||
|
||||
#endif /* _STRUTIL_H_ */
|
||||
|
||||
@@ -1,7 +1,7 @@
|
||||
/*
|
||||
* uninstall_repmgr.sql
|
||||
*
|
||||
* Copyright (C) 2ndQuadrant, 2010-2012
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
Reference in New Issue
Block a user