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46 Commits
v3.0 ... v2.0.2

Author SHA1 Message Date
Ian Barwick
51aa63c8f9 Update version and history for minor release 2.0.2 2015-02-17 16:06:00 +09:00
Ian Barwick
e53162deb8 Fix master port check
Check introduced in dc0dfe9b56
was comparing the provided database name instead of the port.
2015-02-12 14:43:53 +09:00
Jaime Casanova
6a8336b880 Add "--checksum" in rsync when using "--force"
If the user don't put that option in rsync_options using of "--force"
could be unsafe.
While the probability of failures because of this are low they aren't
zero.
2015-02-10 20:28:17 -05:00
Marco Nenciarini
4a445e7f8a Fix syntax errors in repmgr.c 2014-11-10 12:38:18 -05:00
Jaime Casanova
3c1d72a5ea Code review: Do not use psql on do_witness_create,
use createdb and createuser binaries instead
2014-11-10 12:37:10 -05:00
Martín Marqués
d4b9a32a86 errcode.h is a local header. 2014-11-10 12:36:17 -05:00
Martín Marqués
07a216ca25 If the user doesn't pass the port on which the primary server is listening
we have to assume it's the DEFAULT_MASTER_PORT.

This was not done, so we added a check to see if it has a value that is
usable, else we use DEFAULT_MASTER_PORT.
2014-11-10 12:34:30 -05:00
Ian Barwick
d3c067f1bd Clarify repmgr database role
Conflicts:
	QUICKSTART.md
2014-11-10 12:33:26 -05:00
Ian Barwick
e6caf11bf2 Fix pg_hba.conf example
Conflicts:
	QUICKSTART.md
2014-11-10 12:30:33 -05:00
Ian Barwick
9909881d81 Update HISTORY for minor release 2.0.1 2014-11-10 12:27:07 -05:00
Ian Barwick
8073a294f0 Formatting fixes
Conflicts:
	QUICKSTART.md
2014-11-10 12:26:28 -05:00
Ian Barwick
bf5e0b9b48 Correct year in specfile changelog 2014-11-10 12:21:49 -05:00
Ian Barwick
2e9f4aa30f Convert QUICKSTART file to markdown format
Less effort for more consistent formatting (at least the way
github renders it).
2014-11-10 12:12:25 -05:00
Ian Barwick
0dcacc3a70 Formatting fixes 2014-11-10 12:11:42 -05:00
Ian Barwick
65120c47cf Fix formatting 2014-11-10 12:10:47 -05:00
Ian Barwick
f9397c0f06 Add a "quickstart" guide
Provides a succinct overview of the steps needed to get repmgr
up and running as.
2014-11-10 12:04:02 -05:00
Ian Barwick
af3c865b05 Fix log messages in do_standby_promote()
Initial connection is to current standby, before attempting to
connect to old master.
2014-11-10 10:44:55 -05:00
Ian Barwick
112a11a311 Typo fixes 2014-11-10 10:42:39 -05:00
Ian Barwick
7b87b5eddd Change successful standby promotion message to log level 'NOTICE'
Was previously 'ERROR'.
2014-11-10 10:40:31 -05:00
Ian Barwick
1aa36ca1c1 Properly specify rsync --exclude directories
Using '--exclude=dirname/*' to explicitly specify directories whose contents
should not be copied. This will result in empty directories being created
on the destination if they exist on the source, but that's not a problem as
they are needed anyway.

Previously the generated rsync command contained '--exclude=pg_log*', which
will break replication on 9.5 as the wildcard expansion prevents the
'pg_logical' directory from being copied.
2014-11-09 18:16:08 -05:00
Ian Barwick
a7eff1f39e Typo fixes and minor wording tweaks for clarity 2014-11-09 17:25:47 -05:00
Riegie Godwin Jeyaranchen
e64e230559 Update README.rst
Fixing a grammar mistake.
2014-11-09 17:15:42 -05:00
Nathan Van Overloop
bba167db9e init script: make status call return proper return code 2014-11-09 11:13:47 -05:00
Nathan Van Overloop
2676adcaed re-add comment full debug of log.c 2014-11-09 11:04:39 -05:00
Nathan Van Overloop
5a27d5e57b on init of witness server create db and user to avoid using postgres 2014-11-09 10:55:09 -05:00
Nathan Van Overloop
4071589ba5 adapt makefile for RHEL + RHEL specific files 2014-11-09 10:51:40 -05:00
brynhood
6cb2376974 Makefile: create bindir before instal + force dir
in order to facilitate building of an rpm I've added an / to the end of the dirs.
2014-11-07 15:25:45 -05:00
PriceChild
235c98a0b5 Typo in example command. 2014-11-07 15:13:23 -05:00
Warren Moore
16da2f48c2 keep naming consistent 2014-11-07 15:12:49 -05:00
Warren Moore
c23e5858f2 fix: witness creation and monitoring
While reading node entries from master use a separate PGresult when inserting into witness.
Witness monitoring supplies a null value for 'last_apply_time'.
2014-11-07 15:09:05 -05:00
József Kószó
30ccee43d9 debian init script and config file documentation fixes 2014-11-07 15:02:27 -05:00
József Kószó
9357f89d12 debian init script and config file documentation fixes 2014-11-07 15:02:03 -05:00
József Kószó
48da11acfd debian init script and config file documentation fixes 2014-11-07 14:40:53 -05:00
Christian Kruse
07c54c296c removed old comment 2014-11-07 13:49:13 -05:00
Christian Kruse
8f0b9592e8 no longer use global variable for SQL query buffer 2014-11-07 13:47:58 -05:00
Christian Kruse
b35bf3f91d removed no-longer used variable 2014-11-07 13:47:18 -05:00
Christian Kruse
04c101c5f0 rather big refactoring: use a naming scheme
In the past naming of functions, variables and such didn't really have a
naming scheme. Now they should have.

This is backpatched from master (2.1dev) just because it will be easier
to backpatch other fixes.
2014-11-07 13:46:04 -05:00
Christian Kruse
65989840d2 avoid usage of snprintf()
We have a nice little abstraction for snprintf with covering the case
that a string is too big for the target buffer – let's use that!
2014-11-07 13:44:23 -05:00
Christian Kruse
24bd4e7a3f completely avoid usage of strnlen() 2014-11-07 13:40:20 -05:00
Christian Kruse
1c67e105ff pg_indent'ing all files…
Conflicts:
	version.h
2014-11-07 13:32:29 -05:00
Christian Kruse
069f9ff2ed version push 2014-03-17 14:26:56 +01:00
Christian Kruse
b8ade8e908 fixing some documentation errors 2014-03-10 15:51:55 +01:00
Christian Kruse
c0abb3be31 Merge branch 'master' into REL2_0_STABLE 2014-03-06 15:23:52 +01:00
Christian Kruse
0a71123920 Merge branch 'master' into REL2_0_STABLE 2014-03-03 09:25:08 +01:00
Christian Kruse
a72c2296e9 Merge branch 'master' into REL2_0_STABLE 2014-02-11 09:28:40 +01:00
Christian Kruse
9c3d79147b now version.h contains the right version 2014-02-07 21:47:39 +01:00
26 changed files with 2269 additions and 1504 deletions

19
HISTORY
View File

@@ -1,3 +1,18 @@
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)
@@ -17,7 +32,7 @@
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)
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)
@@ -44,7 +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)

View File

@@ -36,12 +36,24 @@ endif
install: install_prog install_ext
install_prog:
$(INSTALL_PROGRAM) repmgrd$(X) '$(DESTDIR)$(bindir)'
$(INSTALL_PROGRAM) repmgr$(X) '$(DESTDIR)$(bindir)'
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)'"; \
@@ -67,3 +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
View 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.

View File

@@ -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.

57
RHEL/repmgr.spec Normal file
View 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
View 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
View File

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

View File

@@ -49,19 +49,19 @@ cluster to communicate with other repmgrd daemons.
8. Start the repmgrd daemons in all nodes
**Note** A complete Hight-Availability design need at least 3 servers to still have
**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 superior.
it's 9.0 or later.
Install repmgr
--------------
Install repmgr following the steps in the README.
Install repmgr following the steps in the README file.
Configure PostreSQL
-------------------
@@ -73,7 +73,7 @@ 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
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
@@ -217,7 +217,7 @@ Edit the repmgr.conf of the node to remove from automatic processing and change:
Then, signal repmgrd daemon::
su - postgres
kill -HUP `pidoff repmgrd`
kill -HUP `pidof repmgrd`
Usage
=====

View File

@@ -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;
@@ -221,9 +222,9 @@ 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 */
xsnprintf(path, buf_sz, "%s/PG_VERSION", dir);
@@ -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);
return false;
}
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));
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 */
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"));
return false;
}
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));
return false;
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;
}

View File

@@ -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

View File

@@ -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));
@@ -56,17 +57,18 @@ parse_config(const char *config_file, t_configuration_options *options)
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] == '#')
@@ -77,22 +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);
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)
@@ -120,9 +123,9 @@ parse_config(const char *config_file, t_configuration_options *options)
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);
strncpy(options->pg_bindir, value, MAXLEN);
else if (strcmp(name, "pg_ctl_options") == 0)
strncpy (options->pgctl_options, value, MAXLEN);
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)
@@ -134,10 +137,10 @@ parse_config(const char *config_file, t_configuration_options *options)
}
/* 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);
@@ -176,22 +179,23 @@ parse_config(const char *config_file, t_configuration_options *options)
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 */
memmove (s, s1, s2 - s1);
memmove(s, s1, s2 - s1);
s[s2 - s1 + 1] = '\0';
return s;
@@ -200,13 +204,13 @@ trim (char *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];
@@ -219,7 +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')
@@ -231,9 +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;
@@ -291,7 +295,7 @@ reload_configuration(char *config_file, t_configuration_options *orig_options)
}
/* 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(_("conninfo string is not valid, will keep current configuration.\n"));
@@ -313,16 +317,16 @@ reload_configuration(char *config_file, t_configuration_options *orig_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;
}

View File

@@ -25,33 +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];
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;
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;
#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_configuration(char *config_file, t_configuration_options *orig_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_config(char *config_file, t_configuration_options * orig_options);
#endif

185
dbutils.c
View File

@@ -26,11 +26,11 @@
#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'");
@@ -40,7 +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)
{
@@ -53,16 +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);
@@ -84,7 +85,7 @@ is_standby(PGconn *conn)
if (res == NULL || PQresultStatus(res) != PGRES_TUPLES_OK)
{
log_err(_("Can't query server mode: %s"),
PQerrorMessage(conn));
PQerrorMessage(conn));
result = -1;
}
else if (PQntuples(res) == 1 && strcmp(PQgetvalue(res, 0, 0), "t") == 0)
@@ -104,7 +105,7 @@ is_witness(PGconn *conn, char *schema, char *cluster, int node_id)
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)
{
@@ -124,6 +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;
@@ -134,15 +136,15 @@ 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
*/
if (!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;
@@ -151,7 +153,7 @@ is_pgup(PGconn *conn, int timeout)
if (PQsendQuery(conn, sqlquery) == 0)
{
log_warning(_("PQsendQuery: Query could not be sent to primary. %s\n"),
PQerrorMessage(conn));
PQerrorMessage(conn));
goto failed;
}
if (wait_connection_availability(conn, timeout) != 1)
@@ -159,11 +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;
}
}
@@ -176,23 +182,23 @@ 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);
return NULL;
}
@@ -204,7 +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, "");
@@ -217,21 +223,21 @@ pg_version(PGconn *conn, char* major_version)
int
guc_set(PGconn *conn, const char *parameter, const char *op,
const char *value)
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));
PQerrorMessage(conn));
retval = -1;
}
else if (PQntuples(res) == 0)
@@ -249,22 +255,22 @@ guc_set(PGconn *conn, const char *parameter, const char *op,
* 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)
guc_set_typed(PGconn *conn, const char *parameter, const char *op,
const char *value, const char *datatype)
{
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 '%s'::%s",
parameter, datatype, op, value, datatype);
" 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));
PQerrorMessage(conn));
retval = -1;
}
else if (PQntuples(res) == 0)
@@ -281,20 +287,20 @@ guc_set_typed(PGconn *conn, const char *parameter, const char *op,
const char *
get_cluster_size(PGconn *conn)
{
PGresult *res;
const char *size = NULL;
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));
PQerrorMessage(conn));
}
else
{
@@ -309,23 +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
@@ -340,8 +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);
@@ -349,17 +355,17 @@ 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);
return NULL;
}
@@ -370,23 +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;
@@ -408,14 +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;
@@ -423,17 +428,19 @@ 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, long long timeout)
{
PGresult *res;
fd_set read_set;
int sock = PQsocket(conn);
struct timeval tmout, before, after;
fd_set read_set;
int sock = PQsocket(conn);
struct timeval tmout,
before,
after;
struct timezone tz;
/* recalc to microseconds */
@@ -450,10 +457,11 @@ wait_connection_availability(PGconn *conn, long long timeout)
if (PQisBusy(conn) == 0)
{
do {
do
{
res = PQgetResult(conn);
PQclear(res);
} while(res != NULL);
} while (res != NULL);
break;
}
@@ -469,8 +477,8 @@ wait_connection_availability(PGconn *conn, long long timeout)
if (select(sock, &read_set, NULL, NULL, &tmout) == -1)
{
log_warning(
_("wait_connection_availability: select() returned with error: %s"),
strerror(errno));
_("wait_connection_availability: select() returned with error: %s"),
strerror(errno));
return -1;
}
gettimeofday(&after, &tz);
@@ -491,10 +499,10 @@ wait_connection_availability(PGconn *conn, long long timeout)
bool
CancelQuery(PGconn *conn, int timeout)
cancel_query(PGconn *conn, int timeout)
{
char errbuf[ERRBUFF_SIZE];
PGcancel *pgcancel;
char errbuf[ERRBUFF_SIZE];
PGcancel *pgcancel;
if (wait_connection_availability(conn, timeout) != 1)
return false;
@@ -505,9 +513,8 @@ CancelQuery(PGconn *conn, int timeout)
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
* 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)
{

View File

@@ -22,23 +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);
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);
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 *getMasterConnection(PGconn *standby_conn, char *schema, char *cluster,
int *master_id, char *master_conninfo_out);
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, long long timeout);
bool CancelQuery(PGconn *conn, int timeout);
#endif

View File

@@ -6,7 +6,7 @@
REPMGRD_ENABLED=no
# Options for repmgrd (required)
#REPMGRD_OPTS="--config_file /path/to/repmgr.conf"
#REPMGRD_OPTS="--config-file /path/to/repmgr.conf"
# User to run repmgrd as
#REPMGRD_USER=postgres

View File

@@ -50,7 +50,7 @@ do_start()
# 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 --chuid $REPMGRD_USER --make-pidfile --pidfile $REPMGRD_PIDFILE --exec $REPMGRD_BIN -- $REPMGRD_OPTS
start-stop-daemon --start --quiet --background --chuid $REPMGRD_USER --make-pidfile --pidfile $REPMGRD_PIDFILE --exec $REPMGRD_BIN -- $REPMGRD_OPTS
}
do_stop()
@@ -90,7 +90,7 @@ case "$1" in
$0 start
;;
status)
status_of_proc -p $PIDFILE $DAEMON $NAME && exit 0 || exit $?
status_of_proc -p $REPMGRD_PIDFILE $REPMGRD_BIN $NAME && exit 0 || exit $?
;;
*)
echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload|status}" >&2

View File

@@ -34,7 +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_ */

117
log.c
View File

@@ -39,24 +39,23 @@
/* #define REPMGR_DEBUG */
void stderr_log_with_level(const char *level_name, int level, const char *fmt, ...) {
size_t len = strlen(fmt);
char fmt1[len + 150];
time_t t;
struct tm *tm;
char buff[100];
va_list ap;
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;
if(log_level >= level) {
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);
strftime(buff, 100, "[%Y-%m-%d %H:%M:%S]", tm);
snprintf(fmt1, len + 150, "%s [%s] %s", buff, level_name, fmt);
vfprintf(stderr, fmt1, ap);
vfprintf(stderr, fmt, ap);
va_end(ap);
fflush(stderr);
@@ -64,20 +63,20 @@ void stderr_log_with_level(const char *level_name, int level, const char *fmt, .
}
static int detect_log_level(const char* level);
static int detect_log_facility(const char* facility);
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;
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)
bool
logger_init(t_configuration_options * opts, const char *ident, const char *level, const char *facility)
{
int l;
int f;
int l;
int f;
#ifdef HAVE_SYSLOG
int syslog_facility = DEFAULT_SYSLOG_FACILITY;
int syslog_facility = DEFAULT_SYSLOG_FACILITY;
#endif
#ifdef REPMGR_DEBUG
@@ -134,17 +133,17 @@ bool logger_init(t_configuration_options *opts, const char* ident, const char* l
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;
FILE *fd;
fd = freopen(opts->logfile, "a", stderr);
if (fd == NULL)
@@ -158,9 +157,9 @@ bool logger_init(t_configuration_options *opts, const char* ident, const char* l
}
bool logger_shutdown(void)
bool
logger_shutdown(void)
{
#ifdef HAVE_SYSLOG
if (log_type == REPMGR_SYSLOG)
closelog();
@@ -174,13 +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;
@@ -202,40 +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;
}
}

35
log.h
View File

@@ -25,7 +25,9 @@
#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)));
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(...) stderr_log_with_level("DEBUG", LOG_DEBUG, __VA_ARGS__)
@@ -88,17 +90,16 @@ void stderr_log_with_level(const char *level_name, int level, const char *fmt, .
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__)
@@ -108,16 +109,18 @@ void stderr_log_with_level(const char *level_name, int level, const char *fmt, .
#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(t_configuration_options *opts, 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

1395
repmgr.c

File diff suppressed because it is too large Load Diff

View File

@@ -50,24 +50,24 @@
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 wait_for_master;
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 T_RUNTIME_OPTIONS_INITIALIZER { "", "", "", "", "", "", DEFAULT_WAL_KEEP_SEGMENTS, false, false, false, false, "", "", 0 }

1004
repmgrd.c

File diff suppressed because it is too large Load Diff

View File

@@ -18,7 +18,7 @@
#include "utils/timestamp.h"
/* same definition as the one in xlog_internal.h */
#define MAXFNAMELEN 64
#define MAXFNAMELEN 64
PG_MODULE_MAGIC;
@@ -27,32 +27,32 @@ PG_MODULE_MAGIC;
*/
typedef struct repmgrSharedState
{
LWLockId lock; /* protects search/modification */
char location[MAXFNAMELEN]; /* last known xlog location */
LWLockId lock; /* protects search/modification */
char location[MAXFNAMELEN]; /* last known xlog location */
TimestampTz last_updated;
} repmgrSharedState;
} 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);
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);
@@ -68,9 +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;
@@ -120,15 +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);
@@ -141,20 +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;
}
@@ -166,7 +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)
@@ -184,14 +184,14 @@ 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));
}
@@ -220,9 +220,9 @@ repmgr_get_last_updated(PG_FUNCTION_ARGS)
{
TimestampTz last_updated;
/* Safety check... */
if (!shared_state)
PG_RETURN_NULL();
/* Safety check... */
if (!shared_state)
PG_RETURN_NULL();
LWLockAcquire(shared_state->lock, LW_EXCLUSIVE);
last_updated = shared_state->last_updated;

View File

@@ -25,29 +25,21 @@
#include "log.h"
#include "strutil.h"
static int xvsnprintf(char *str, size_t size, const char *format, va_list ap) __attribute__ ((format (PG_PRINTF_ATTRIBUTE, 3, 0)));
/* 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 >= (int)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;

View File

@@ -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, ...) __attribute__ ((format (PG_PRINTF_ATTRIBUTE, 3, 4)));
extern int sqlquery_snprintf(char *str, const char *format, ...) __attribute__ ((format (PG_PRINTF_ATTRIBUTE, 2, 3)));
extern int maxlen_snprintf(char *str, const char *format, ...) __attribute__ ((format (PG_PRINTF_ATTRIBUTE, 2, 3)));
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_ */

View File

@@ -1,5 +1,6 @@
#ifndef _VERSION_H_
#define _VERSION_H_
#define REPMGR_VERSION "2.1dev"
#define REPMGR_VERSION "2.0.2"
#endif