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|---|---|---|---|
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@@ -1,29 +0,0 @@
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||||
License and Contributions
|
||||
=========================
|
||||
|
||||
`repmgr` is licensed under the GPL v3. All of its code and documentation is
|
||||
Copyright 2010-2016, 2ndQuadrant Limited. See the files COPYRIGHT and LICENSE for
|
||||
details.
|
||||
|
||||
The development of repmgr has primarily been sponsored by 2ndQuadrant customers.
|
||||
|
||||
Additional work has been sponsored by the 4CaaST project for cloud computing,
|
||||
which has received funding from the European Union's Seventh Framework Programme
|
||||
(FP7/2007-2013) under grant agreement 258862.
|
||||
|
||||
Contributions to `repmgr` are welcome, and will be listed in the file `CREDITS`.
|
||||
2ndQuadrant Limited requires that any contributions provide a copyright
|
||||
assignment and a disclaimer of any work-for-hire ownership claims from the
|
||||
employer of the developer. This lets us make sure that all of the repmgr
|
||||
distribution remains free code. Please contact info@2ndQuadrant.com for a
|
||||
copy of the relevant Copyright Assignment Form.
|
||||
|
||||
Code style
|
||||
----------
|
||||
|
||||
Code in repmgr is formatted to a consistent style using the following command:
|
||||
|
||||
astyle --style=ansi --indent=tab --suffix=none *.c *.h
|
||||
|
||||
Contributors should reformat their code similarly before submitting code to
|
||||
the project, in order to minimize merge conflicts with other work.
|
||||
@@ -1,4 +1,4 @@
|
||||
Copyright (c) 2010-2016, 2ndQuadrant Limited
|
||||
Copyright (c) 2010-2014, 2ndQuadrant Limited
|
||||
All rights reserved.
|
||||
|
||||
This program is free software: you can redistribute it and/or modify
|
||||
|
||||
@@ -1 +0,0 @@
|
||||
The contents of this file have been incorporated into the main README.md document.
|
||||
183
FAQ.md
183
FAQ.md
@@ -1,183 +0,0 @@
|
||||
FAQ - Frequently Asked Questions about repmgr
|
||||
=============================================
|
||||
|
||||
This FAQ applies to `repmgr` 3.0 and later.
|
||||
|
||||
General
|
||||
-------
|
||||
|
||||
- What's the difference between the repmgr versions?
|
||||
|
||||
repmgr 3.x builds on the improved replication facilities added
|
||||
in PostgreSQL 9.3, as well as improved automated failover support
|
||||
via `repmgrd`, and is not compatible with PostgreSQL 9.2 and earlier.
|
||||
|
||||
repmgr 2.x supports PostgreSQL 9.0 onwards. While it is compatible
|
||||
with PostgreSQL 9.3 and later, we recommend repmgr v3.
|
||||
|
||||
- What's the advantage of using replication slots?
|
||||
|
||||
Replication slots, introduced in PostgreSQL 9.4, ensure that the
|
||||
master server will retain WAL files until they have been consumed
|
||||
by all standby servers. This makes WAL file management much easier,
|
||||
and if used `repmgr` will no longer insist on a fixed number (default: 5000)
|
||||
of WAL files being preserved.
|
||||
|
||||
(However this does mean that if a standby is no longer connected to the
|
||||
master, the master will retain WAL files indefinitely).
|
||||
|
||||
- How many replication slots should I define in `max_replication_slots`?
|
||||
|
||||
Normally at least same number as the number of standbys which will connect
|
||||
to the node. Note that changes to `max_replication_slots` require a server
|
||||
restart to take effect, and as there is no particular penalty for unused
|
||||
replication slots, setting a higher figure will make adding new nodes
|
||||
easier.
|
||||
|
||||
- Does `repmgr` support hash indexes?
|
||||
|
||||
No. Hash indexes and replication do not mix well and their use is
|
||||
explicitly discouraged; see:
|
||||
https://www.postgresql.org/docs/current/interactive/sql-createindex.html#AEN74175
|
||||
|
||||
`repmgr`
|
||||
--------
|
||||
|
||||
- When should I use the --rsync-only option?
|
||||
|
||||
By default, `repmgr` uses `pg_basebackup` to clone a standby from
|
||||
a master. However, `pg_basebackup` copies the entire data directory, which
|
||||
can take some time depending on installation size. If you have an
|
||||
existing but "stale" standby, `repmgr` can use `rsync` instead,
|
||||
which means only changed or added files need to be copied.
|
||||
|
||||
- Can I register an existing master/standby?
|
||||
|
||||
Yes, this is no problem.
|
||||
|
||||
- How can a failed master be re-added as a standby?
|
||||
|
||||
This is a two-stage process. First, the failed master's data directory
|
||||
must be re-synced with the current master; secondly the failed master
|
||||
needs to be re-registered as a standby. The section "Converting a failed
|
||||
master to a standby" in the `README.md` file contains more detailed
|
||||
information on this process.
|
||||
|
||||
- Is there an easy way to check my master server is correctly configured
|
||||
for use with `repmgr`?
|
||||
|
||||
Yes - execute `repmgr` with the `--check-upstream-config` option, and it
|
||||
will let you know which items in `postgresql.conf` need to be modified.
|
||||
|
||||
- Even though I specified custom `rsync` options, `repmgr` appends
|
||||
the `--checksum` - why?
|
||||
|
||||
When syncing a stale data directory from an active server, it's
|
||||
essential that `rsync` compares the content of files rather than
|
||||
just timestamp and size, to ensure that all changed files are
|
||||
copied and prevent corruption.
|
||||
|
||||
- When cloning a standby, how can I prevent `repmgr` from copying
|
||||
`postgresql.conf` and `pg_hba.conf` from the PostgreSQL configuration
|
||||
directory in `/etc`?
|
||||
|
||||
Use the command line option `--ignore-external-config-files`
|
||||
|
||||
- How can I prevent `repmgr` from copying local configuration files
|
||||
in the data directory?
|
||||
|
||||
If you're updating an existing but stale data directory which
|
||||
contains e.g. configuration files you don't want to be overwritten
|
||||
with the same file from the master, specify the files in the
|
||||
`rsync_options` configuration option, e.g.
|
||||
|
||||
rsync_options=--exclude=postgresql.local.conf
|
||||
|
||||
This option is only available when using the `--rsync-only` option.
|
||||
|
||||
- How can I make the witness server use a particular port?
|
||||
|
||||
By default the witness server is configured to use port 5499; this
|
||||
is intended to support running the witness server as a separate
|
||||
instance on a normal node server, rather than on its own dedicated server.
|
||||
|
||||
To specify different port for the witness server, supply the port number
|
||||
in the `conninfo` string in `repmgr.conf`
|
||||
(repmgr 3.0.1 and earlier: use the `-l/--local-port` option)
|
||||
|
||||
- Do I need to include `shared_preload_libraries = 'repmgr_funcs'`
|
||||
in `postgresql.conf` if I'm not using `repmgrd`?
|
||||
|
||||
No, the `repmgr_funcs` library is only needed when running `repmgrd`.
|
||||
If you later decide to run `repmgrd`, you just need to add
|
||||
`shared_preload_libraries = 'repmgr_funcs'` and restart PostgreSQL.
|
||||
|
||||
- I've provided replication permission for the `repmgr` user in `pg_hba.conf`
|
||||
but `repmgr`/`repmgrd` complains it can't connect to the server... Why?
|
||||
|
||||
`repmgr`/`repmgrd` need to be able to connect to the repmgr database
|
||||
with a normal connection to query metadata. The `replication` connection
|
||||
permission is for PostgreSQL's streaming replication and doesn't
|
||||
necessarily need to be the `repmgr` user.
|
||||
|
||||
- When cloning a standby, why do I need to provide the connection parameters
|
||||
for the primary server on the command line, not in the configuration file?
|
||||
|
||||
Cloning a standby is a one-time action; the role of the server being cloned
|
||||
from could change, so fixing it in the configuration file would create
|
||||
confusion. If `repmgr` needs to establish a connection to the primary
|
||||
server, it can retrieve this from the `repl_nodes` table or if necessary
|
||||
scan the replication cluster until it locates the active primary.
|
||||
|
||||
- Why is there no foreign key on the `node_id` column in the `repl_events`
|
||||
table?
|
||||
|
||||
Under some circumstances event notifications can be generated for servers
|
||||
which have not yet been registered; it's also useful to retain a record
|
||||
of events which includes servers removed from the replication cluster
|
||||
which no longer have an entry in the `repl_nodes` table.
|
||||
|
||||
|
||||
`repmgrd`
|
||||
---------
|
||||
|
||||
- Do I need a witness server?
|
||||
|
||||
Not necessarily. However if you have an uneven number of nodes spread
|
||||
over more than one network segment, a witness server will enable
|
||||
better handling of a 'split brain' situation by providing a "casting
|
||||
vote" on the preferred network segment.
|
||||
|
||||
- How can I prevent a node from ever being promoted to master?
|
||||
|
||||
In `repmgr.conf`, set its priority to a value of 0 or less.
|
||||
|
||||
Additionally, if `failover` is set to `manual`, the node will never
|
||||
be considered as a promotion candidate.
|
||||
|
||||
- Does `repmgrd` support delayed standbys?
|
||||
|
||||
`repmgrd` can monitor delayed standbys - those set up with
|
||||
`recovery_min_apply_delay` set to a non-zero value in `recovery.conf` -
|
||||
but as it's not currently possible to directly examine the value
|
||||
applied to the standby, `repmgrd` may not be able to properly evaluate
|
||||
the node as a promotion candidate.
|
||||
|
||||
We recommend that delayed standbys are explicitly excluded from promotion
|
||||
by setting `priority` to 0 in `repmgr.conf`.
|
||||
|
||||
Note that after registering a delayed standby, `repmgrd` will only start
|
||||
once the metadata added in the master node has been replicated.
|
||||
|
||||
- How can I get `repmgrd` to rotate its logfile?
|
||||
|
||||
Configure your system's `logrotate` service to do this; see example
|
||||
in README.md
|
||||
|
||||
- I've recloned a failed master as a standby, but `repmgrd` refuses to start?
|
||||
|
||||
Check you registered the standby after recloning. If unregistered the standby
|
||||
cannot be considered as a promotion candidate even if `failover` is set to
|
||||
`automatic`, which is probably not what you want. `repmgrd` will start if
|
||||
`failover` is set to `manual` so the node's replication status can still
|
||||
be monitored, if desired.
|
||||
165
HISTORY
165
HISTORY
@@ -1,158 +1,3 @@
|
||||
3.2 2016-10-05
|
||||
repmgr: add support for cloning from a Barman backup (Gianni)
|
||||
repmgr: add commands `standby matrix` and `standby crosscheck` (Gianni)
|
||||
repmgr: suppress connection error display in `repmgr cluster show`
|
||||
unless `--verbose` supplied (Ian)
|
||||
repmgr: add commands `witness register` and `witness unregister` (Ian)
|
||||
repmgr: enable `standby unregister` / `witness unregister` to be
|
||||
executed for a node which is not running (Ian)
|
||||
repmgr: remove deprecated command line options --initdb-no-pwprompt and
|
||||
-l/--local-port (Ian)
|
||||
repmgr: before cloning with pg_basebackup, check that sufficient free
|
||||
walsenders are available (Ian)
|
||||
repmgr: add option `--wait-sync` for `standby register` which causes
|
||||
repmgr to wait for the registered node record to synchronise to
|
||||
the standby (Ian)
|
||||
repmgr: add option `--copy-external-config-files` for files outside
|
||||
of the data directory (Ian)
|
||||
repmgr: add configuration options to override the default pg_ctl
|
||||
commands (Jarkko Oranen, Ian)
|
||||
repmgr: only require `wal_keep_segments` to be set in certain corner
|
||||
cases (Ian)
|
||||
repmgr: better support cloning from a node other than the one to
|
||||
stream from (Ian)
|
||||
repmgrd: don't start if node is inactive and failover=automatic (Ian)
|
||||
packaging: improve "repmgr-auto" Debian package (Gianni)
|
||||
|
||||
|
||||
3.1.5 2016-08-15
|
||||
repmgrd: in a failover situation, prevent endless looping when
|
||||
attempting to establish the status of a node with
|
||||
`failover=manual` (Ian)
|
||||
repmgrd: improve handling of failover events on standbys with
|
||||
`failover=manual`, and create a new event notification
|
||||
for this, `standby_disconnect_manual` (Ian)
|
||||
repmgr: add further event notifications (Gianni)
|
||||
repmgr: when executing `standby switchover`, don't collect remote
|
||||
command output unless required (Gianni, Ian)
|
||||
repmgrd: improve standby monitoring query (Ian, based on suggestion
|
||||
from Álvaro)
|
||||
repmgr: various command line handling improvements (Ian)
|
||||
|
||||
3.1.4 2016-07-12
|
||||
repmgr: new configuration option for setting "restore_command"
|
||||
in the recovery.conf file generated by repmgr (Martín)
|
||||
repmgr: add --csv option to "repmgr cluster show" (Gianni)
|
||||
repmgr: enable provision of a conninfo string as the -d/--dbname
|
||||
parameter, similar to other PostgreSQL utilities (Ian)
|
||||
repmgr: during switchover operations improve detection of
|
||||
demotion candidate shutdown (Ian)
|
||||
various bugfixes and documentation updates (Ian, Martín)
|
||||
|
||||
3.1.3 2016-05-17
|
||||
repmgrd: enable monitoring when a standby is catching up by
|
||||
replaying archived WAL (Ian)
|
||||
repmgrd: when upstream_node_id is NULL, assume upstream node
|
||||
to be current master (Ian)
|
||||
repmgrd: check for reappearance of the master node if standby
|
||||
promotion fails (Ian)
|
||||
improve handling of rsync failure conditions (Martín)
|
||||
|
||||
3.1.2 2016-04-12
|
||||
Fix pg_ctl path generation in do_standby_switchover() (Ian)
|
||||
Regularly sync witness server repl_nodes table (Ian)
|
||||
Documentation improvements (Gianni, dhyannataraj)
|
||||
(Experimental) ensure repmgr handles failover slots when copying
|
||||
in rsync mode (Craig, Ian)
|
||||
rsync mode handling fixes (Martín)
|
||||
Enable repmgr to compile against 9.6devel (Ian)
|
||||
|
||||
3.1.1 2016-02-24
|
||||
Add '-P/--pwprompt' option for "repmgr create witness" (Ian)
|
||||
Prevent repmgr/repmgrd running as root (Ian)
|
||||
|
||||
3.1.0 2016-02-01
|
||||
Add "repmgr standby switchover" command (Ian)
|
||||
Revised README file (Ian)
|
||||
Remove requirement for 'archive_mode' to be enabled (Ian)
|
||||
Improve -?/--help output, showing default values if relevant (Ian)
|
||||
Various bugfixes to command line/configuration parameter handling (Ian)
|
||||
|
||||
3.0.3 2016-01-04
|
||||
Create replication slot if required before base backup is run (Abhijit)
|
||||
standy clone: when using rsync, clean up "pg_replslot" directory (Ian)
|
||||
Improve --help output (Ian)
|
||||
Improve config file parsing (Ian)
|
||||
Various logging output improvements, including explicit HINTS (Ian)
|
||||
Add --log-level to explicitly set log level on command line (Ian)
|
||||
Repurpose --verbose to display extra log output (Ian)
|
||||
Add --terse to hide hints and other non-critical output (Ian)
|
||||
Reference internal functions with explicit catalog path (Ian)
|
||||
When following a new primary, have repmgr (not repmgrd) create the new slot (Ian)
|
||||
Add /etc/repmgr.conf as a default configuration file location (Ian)
|
||||
Prevent repmgrd's -v/--verbose option expecting a parameter (Ian)
|
||||
Prevent invalid replication_lag values being written to the monitoring table (Ian)
|
||||
Improve repmgrd behaviour when monitored standby node is temporarily
|
||||
unavailable (Martín)
|
||||
|
||||
3.0.2 2015-10-02
|
||||
Improve handling of --help/--version options; and improve help output (Ian)
|
||||
Improve handling of situation where logfile can't be opened (Ian)
|
||||
Always pass -D/--pgdata option to pg_basebackup (Ian)
|
||||
Bugfix: standby clone --force does not empty pg_xlog (Gianni)
|
||||
Bugfix: autofailover with reconnect_attempts > 1 (Gianni)
|
||||
Bugfix: ignore comments after values (soxwellfb)
|
||||
Bugfix: handle string values in 'node' parameter correctly (Gregory Duchatelet)
|
||||
Allow repmgr to be compiled with a newer libpq (Marco)
|
||||
Bugfix: call update_node_record_set_upstream() for STANDBY FOLLOW (Tomas)
|
||||
Update `repmgr --help` output (per Github report from renard)
|
||||
Update tablespace remapping in --rsync-only mode for 9.5 and later (Ian)
|
||||
Deprecate `-l/--local-port` option - the port can be extracted
|
||||
from the conninfo string in repmgr.conf (Ian)
|
||||
Add STANDBY UNREGISTER (Vik Fearing)
|
||||
Don't fail with error when registering master if schema already defined (Ian)
|
||||
Fixes to whitespace handling when parsing config file (Ian)
|
||||
|
||||
3.0.1 2015-04-16
|
||||
Prevent repmgrd from looping infinitely if node was not registered (Ian)
|
||||
When promoting a standby, have repmgr (not repmgrd) handle metadata updates (Ian)
|
||||
Re-use replication slot if it already exists (Ian)
|
||||
Prevent a test SSH connection being made when not needed (Ian)
|
||||
Correct monitoring table column names (Ian)
|
||||
|
||||
3.0 2015-03-27
|
||||
Require PostgreSQL 9.3 or later (Ian)
|
||||
Use `pg_basebackup` by default (instead of `rsync`) to clone standby servers (Ian)
|
||||
Use `pg_ctl promote` to promote a standby to primary
|
||||
Enable tablespace remapping using `pg_basebackup` (in PostgreSQL 9.3 with `rsync`) (Ian)
|
||||
Support cascaded standbys (Ian)
|
||||
"pg_bindir" no longer required as a configuration parameter (Ian)
|
||||
Enable replication slots to be used (PostgreSQL 9.4 and later (Ian)
|
||||
Command line option "--check-upstream-config" (Ian)
|
||||
Add event logging table and option to execute an external program when an event occurs (Ian)
|
||||
General usability and logging message improvements (Ian)
|
||||
Code consolidation and cleanup (Ian)
|
||||
|
||||
2.0.3 2015-04-16
|
||||
Add -S/--superuser option for witness database creation Ian)
|
||||
Add -c/--fast-checkpoint option for cloning (Christoph)
|
||||
Add option "--initdb-no-pwprompt" (Ian)
|
||||
|
||||
2.0.2 2015-02-17
|
||||
Add "--checksum" in rsync when using "--force" (Jaime)
|
||||
Use createdb/createuser instead of psql (Jaime)
|
||||
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)
|
||||
@@ -180,15 +25,15 @@
|
||||
Make the monitoring optional and turned off by default, it can be turned on with --monitoring-history switch (Jaime)
|
||||
Add tunables to specify number of retries to reconnect to master and the time between them (Jaime)
|
||||
|
||||
1.2.0 2012-07-27
|
||||
Test ssh connection before trying to rsync (Cédric)
|
||||
1.2.0 2012-07-27
|
||||
Test ssh connection before trying to rsync (Cédric)
|
||||
Add CLUSTER SHOW command (Carlo)
|
||||
Add CLUSTER CLEANUP command (Jaime)
|
||||
Add function write_primary_conninfo (Marco)
|
||||
Teach repmgr how to get tablespace's location in different pg version (Jaime)
|
||||
Improve version message (Carlo)
|
||||
Improve version message (Carlo)
|
||||
|
||||
1.1.1 2012-04-18
|
||||
1.1.1 2012-04-18
|
||||
Add --ignore-rsync-warning (Cédric)
|
||||
Add strnlen for compatibility with OS X (Greg)
|
||||
Improve performance of the repl_status view (Jaime)
|
||||
@@ -199,7 +44,7 @@
|
||||
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)
|
||||
|
||||
71
Makefile
71
Makefile
@@ -1,33 +1,24 @@
|
||||
#
|
||||
# Makefile
|
||||
# Copyright (c) 2ndQuadrant, 2010-2016
|
||||
|
||||
HEADERS = $(wildcard *.h)
|
||||
# Copyright (c) 2ndQuadrant, 2010-2014
|
||||
|
||||
repmgrd_OBJS = dbutils.o config.o repmgrd.o log.o strutil.o
|
||||
repmgr_OBJS = dbutils.o check_dir.o config.o repmgr.o log.o strutil.o dirmod.o
|
||||
repmgr_OBJS = dbutils.o check_dir.o config.o repmgr.o log.o strutil.o
|
||||
|
||||
DATA = repmgr.sql uninstall_repmgr.sql
|
||||
|
||||
PG_CPPFLAGS = -I$(libpq_srcdir)
|
||||
PG_LIBS = $(libpq_pgport)
|
||||
PG_LIBS = $(libpq_pgport)
|
||||
|
||||
|
||||
all: repmgrd repmgr
|
||||
all: repmgrd repmgr
|
||||
$(MAKE) -C sql
|
||||
|
||||
repmgrd: $(repmgrd_OBJS)
|
||||
$(CC) -o repmgrd $(CFLAGS) $(repmgrd_OBJS) $(PG_LIBS) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS)
|
||||
$(CC) $(CFLAGS) $(repmgrd_OBJS) $(PG_LIBS) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o repmgrd
|
||||
$(MAKE) -C sql
|
||||
|
||||
repmgr: $(repmgr_OBJS)
|
||||
$(CC) -o repmgr $(CFLAGS) $(repmgr_OBJS) $(PG_LIBS) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS)
|
||||
|
||||
# Make all objects depend on all include files. This is a bit of a
|
||||
# shotgun approach, but the codebase is small enough that a complete rebuild
|
||||
# is very fast anyway.
|
||||
$(repmgr_OBJS): $(HEADERS)
|
||||
$(repmgrd_OBJS): $(HEADERS)
|
||||
$(CC) $(CFLAGS) $(repmgr_OBJS) $(PG_LIBS) $(LDFLAGS) $(LDFLAGS_EX) $(LIBS) -o repmgr
|
||||
|
||||
ifdef USE_PGXS
|
||||
PG_CONFIG = pg_config
|
||||
@@ -40,35 +31,17 @@ include $(top_builddir)/src/Makefile.global
|
||||
include $(top_srcdir)/contrib/contrib-global.mk
|
||||
endif
|
||||
|
||||
# XXX: This overrides the pgxs install target - we're building two binaries,
|
||||
# which is not supported by pgxs.mk's PROGRAM construct.
|
||||
# XXX: Try to use PROGRAM construct (see pgxs.mk) someday. Right now
|
||||
# is overriding pgxs install.
|
||||
install: install_prog install_ext
|
||||
|
||||
install_prog:
|
||||
mkdir -p '$(DESTDIR)$(bindir)'
|
||||
$(INSTALL_PROGRAM) repmgrd$(X) '$(DESTDIR)$(bindir)/'
|
||||
$(INSTALL_PROGRAM) repmgr$(X) '$(DESTDIR)$(bindir)/'
|
||||
$(INSTALL_PROGRAM) repmgrd$(X) '$(DESTDIR)$(bindir)'
|
||||
$(INSTALL_PROGRAM) repmgr$(X) '$(DESTDIR)$(bindir)'
|
||||
|
||||
install_ext:
|
||||
$(MAKE) -C sql install
|
||||
|
||||
# Distribution-specific package building targets
|
||||
# ----------------------------------------------
|
||||
#
|
||||
# XXX we recommend using the PGDG-supplied packages where possible;
|
||||
# see README.md for details.
|
||||
|
||||
install_rhel:
|
||||
mkdir -p '$(DESTDIR)/etc/init.d/'
|
||||
$(INSTALL_PROGRAM) RHEL/repmgrd.init '$(DESTDIR)/etc/init.d/repmgrd'
|
||||
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)'"; \
|
||||
@@ -82,23 +55,15 @@ clean:
|
||||
rm -f repmgr
|
||||
$(MAKE) -C sql clean
|
||||
|
||||
# Get correct version numbers and install paths, depending on your postgres version
|
||||
PG_VERSION = $(shell pg_config --version | cut -d ' ' -f 2 | cut -d '.' -f 1,2)
|
||||
REPMGR_VERSION = $(shell grep REPMGR_VERSION version.h | cut -d ' ' -f 3 | cut -d '"' -f 2)
|
||||
PKGLIBDIR = $(shell pg_config --pkglibdir)
|
||||
SHAREDIR = $(shell pg_config --sharedir)
|
||||
PGBINDIR = /usr/lib/postgresql/$(PG_VERSION)/bin
|
||||
|
||||
deb: repmgrd repmgr
|
||||
mkdir -p ./debian/usr/bin ./debian$(PGBINDIR)
|
||||
cp repmgrd repmgr ./debian$(PGBINDIR)
|
||||
ln -s ../..$(PGBINDIR)/repmgr ./debian/usr/bin/repmgr
|
||||
mkdir -p ./debian$(SHAREDIR)/contrib/
|
||||
cp sql/repmgr_funcs.sql ./debian$(SHAREDIR)/contrib/
|
||||
cp sql/uninstall_repmgr_funcs.sql ./debian$(SHAREDIR)/contrib/
|
||||
mkdir -p ./debian$(PKGLIBDIR)/
|
||||
cp sql/repmgr_funcs.so ./debian$(PKGLIBDIR)/
|
||||
mkdir -p ./debian/usr/bin
|
||||
cp repmgrd repmgr ./debian/usr/bin/
|
||||
mkdir -p ./debian/usr/share/postgresql/9.0/contrib/
|
||||
cp sql/repmgr_funcs.sql ./debian/usr/share/postgresql/9.0/contrib/
|
||||
cp sql/uninstall_repmgr_funcs.sql ./debian/usr/share/postgresql/9.0/contrib/
|
||||
mkdir -p ./debian/usr/lib/postgresql/9.0/lib/
|
||||
cp sql/repmgr_funcs.so ./debian/usr/lib/postgresql/9.0/lib/
|
||||
dpkg-deb --build debian
|
||||
mv debian.deb ../postgresql-repmgr-$(PG_VERSION)_$(REPMGR_VERSION).deb
|
||||
mv debian.deb ../postgresql-repmgr-9.0_1.0.0.deb
|
||||
rm -rf ./debian/usr
|
||||
|
||||
|
||||
127
PACKAGES.md
127
PACKAGES.md
@@ -1,127 +0,0 @@
|
||||
Packaging
|
||||
=========
|
||||
|
||||
Notes on RedHat Linux, Fedora, and CentOS Builds
|
||||
------------------------------------------------
|
||||
|
||||
The RPM packages of PostgreSQL put `pg_config` into the `postgresql-devel`
|
||||
package, not the main server one. And if you have a RPM install of PostgreSQL
|
||||
9.0, the entire PostgreSQL binary directory will not be in your PATH by default
|
||||
either. Individual utilities are made available via the `alternatives`
|
||||
mechanism, but not all commands will be wrapped that way. The files installed
|
||||
by repmgr will certainly not be in the default PATH for the postgres user
|
||||
on such a system. They will instead be in /usr/pgsql-9.0/bin/ on this
|
||||
type of system.
|
||||
|
||||
When building repmgr against a RPM packaged build, you may discover that some
|
||||
development packages are needed as well. The following build errors can
|
||||
occur:
|
||||
|
||||
/usr/bin/ld: cannot find -lxslt
|
||||
/usr/bin/ld: cannot find -lpam
|
||||
|
||||
Install the following packages to correct those:
|
||||
|
||||
|
||||
yum install libxslt-devel
|
||||
yum install pam-devel
|
||||
|
||||
If building repmgr as a regular user, then doing the install into the system
|
||||
directories using sudo, the syntax is hard. `pg_config` won't be in root's
|
||||
path either. The following recipe should work:
|
||||
|
||||
sudo PATH="/usr/pgsql-9.0/bin:$PATH" make USE_PGXS=1 install
|
||||
|
||||
|
||||
Issues with 32 and 64 bit RPMs
|
||||
------------------------------
|
||||
|
||||
If when building, you receive a series of errors of this form:
|
||||
|
||||
/usr/bin/ld: skipping incompatible /usr/pgsql-9.0/lib/libpq.so when searching for -lpq
|
||||
|
||||
This is likely because you have both the 32 and 64 bit versions of the
|
||||
`postgresql90-devel` package installed. You can check that like this:
|
||||
|
||||
rpm -qa --queryformat '%{NAME}\t%{ARCH}\n' | grep postgresql90-devel
|
||||
|
||||
And if two packages appear, one for i386 and one for x86_64, that's not supposed
|
||||
to be allowed.
|
||||
|
||||
This can happen when using the PGDG repo to install that package;
|
||||
here is an example sessions demonstrating the problem case appearing:
|
||||
|
||||
|
||||
# yum install postgresql-devel
|
||||
..
|
||||
Setting up Install Process
|
||||
Resolving Dependencies
|
||||
--> Running transaction check
|
||||
---> Package postgresql90-devel.i386 0:9.0.2-2PGDG.rhel5 set to be updated
|
||||
---> Package postgresql90-devel.x86_64 0:9.0.2-2PGDG.rhel5 set to be updated
|
||||
--> Finished Dependency Resolution
|
||||
|
||||
Dependencies Resolved
|
||||
|
||||
=========================================================================
|
||||
Package Arch Version Repository Size
|
||||
=========================================================================
|
||||
Installing:
|
||||
postgresql90-devel i386 9.0.2-2PGDG.rhel5 pgdg90 1.5 M
|
||||
postgresql90-devel x86_64 9.0.2-2PGDG.rhel5 pgdg90 1.6 M
|
||||
|
||||
|
||||
Note how both the i386 and x86_64 platform architectures are selected for
|
||||
installation. Your main PostgreSQL package will only be compatible with one of
|
||||
those, and if the repmgr build finds the wrong postgresql90-devel these
|
||||
"skipping incompatible" messages appear.
|
||||
|
||||
In this case, you can temporarily remove both packages, then just install the
|
||||
correct one for your architecture. Example:
|
||||
|
||||
rpm -e postgresql90-devel --allmatches
|
||||
yum install postgresql90-devel-9.0.2-2PGDG.rhel5.x86_64
|
||||
|
||||
Instead just deleting the package from the wrong platform might not leave behind
|
||||
the correct files, due to the way in which these accidentally happen to interact.
|
||||
If you already tried to build repmgr before doing this, you'll need to do:
|
||||
|
||||
make USE_PGXS=1 clean
|
||||
|
||||
to get rid of leftover files from the wrong architecture.
|
||||
|
||||
Notes on Ubuntu, Debian or other Debian-based Builds
|
||||
----------------------------------------------------
|
||||
|
||||
The Debian packages of PostgreSQL put `pg_config` into the development package
|
||||
called `postgresql-server-dev-$version`.
|
||||
|
||||
When building repmgr against a Debian packages build, you may discover that some
|
||||
development packages are needed as well. You will need the following development
|
||||
packages installed:
|
||||
|
||||
sudo apt-get install libxslt-dev libxml2-dev libpam-dev libedit-dev
|
||||
|
||||
If you're using Debian packages for PostgreSQL and are building repmgr with the
|
||||
USE_PGXS option you also need to install the corresponding development package:
|
||||
|
||||
sudo apt-get install postgresql-server-dev-9.0
|
||||
|
||||
If you build and install repmgr manually it will not be on the system path. The
|
||||
binaries will be installed in /usr/lib/postgresql/$version/bin/ which is not on
|
||||
the default path. The reason behind this is that Ubuntu/Debian systems manage
|
||||
multiple installed versions of PostgreSQL on the same system through a wrapper
|
||||
called pg_wrapper and repmgr is not (yet) known to this wrapper.
|
||||
|
||||
You can solve this in many different ways, the most Debian like is to make an
|
||||
alternate for repmgr and repmgrd:
|
||||
|
||||
sudo update-alternatives --install /usr/bin/repmgr repmgr /usr/lib/postgresql/9.0/bin/repmgr 10
|
||||
sudo update-alternatives --install /usr/bin/repmgrd repmgrd /usr/lib/postgresql/9.0/bin/repmgrd 10
|
||||
|
||||
You can also make a deb package of repmgr using:
|
||||
|
||||
make USE_PGXS=1 deb
|
||||
|
||||
This will build a Debian package one level up from where you build, normally the
|
||||
same directory that you have your repmgr/ directory in.
|
||||
@@ -1 +0,0 @@
|
||||
The contents of this file have been incorporated into the main README.md document.
|
||||
1144
README.rst
Normal file
1144
README.rst
Normal file
File diff suppressed because it is too large
Load Diff
36
SSH-RSYNC.md
36
SSH-RSYNC.md
@@ -1,36 +0,0 @@
|
||||
Set up trusted copy between postgres accounts
|
||||
---------------------------------------------
|
||||
|
||||
If you need to use `rsync` to clone standby servers, the `postgres` account
|
||||
on your primary and standby servers must be each able to access the other
|
||||
using SSH without a password.
|
||||
|
||||
First generate an ssh key, using an empty passphrase, and copy the resulting
|
||||
keys and a matching authorization file to a privileged user account on the other
|
||||
system:
|
||||
|
||||
[postgres@node1]$ ssh-keygen -t rsa
|
||||
Generating public/private rsa key pair.
|
||||
Enter file in which to save the key (/var/lib/pgsql/.ssh/id_rsa):
|
||||
Enter passphrase (empty for no passphrase):
|
||||
Enter same passphrase again:
|
||||
Your identification has been saved in /var/lib/pgsql/.ssh/id_rsa.
|
||||
Your public key has been saved in /var/lib/pgsql/.ssh/id_rsa.pub.
|
||||
The key fingerprint is:
|
||||
aa:bb:cc:dd:ee:ff:aa:11:22:33:44:55:66:77:88:99 postgres@db1.domain.com
|
||||
[postgres@node1]$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
|
||||
[postgres@node1]$ chmod go-rwx ~/.ssh/*
|
||||
[postgres@node1]$ cd ~/.ssh
|
||||
[postgres@node1]$ scp id_rsa.pub id_rsa authorized_keys user@node2:
|
||||
|
||||
Login as a user on the other system, and install the files into the `postgres`
|
||||
user's account:
|
||||
|
||||
[user@node2 ~]$ sudo chown postgres.postgres authorized_keys id_rsa.pub id_rsa
|
||||
[user@node2 ~]$ sudo mkdir -p ~postgres/.ssh
|
||||
[user@node2 ~]$ sudo chown postgres.postgres ~postgres/.ssh
|
||||
[user@node2 ~]$ sudo mv authorized_keys id_rsa.pub id_rsa ~postgres/.ssh
|
||||
[user@node2 ~]$ sudo chmod -R go-rwx ~postgres/.ssh
|
||||
|
||||
Now test that ssh in both directions works. You may have to accept some new
|
||||
known hosts in the process.
|
||||
58
TODO
58
TODO
@@ -5,15 +5,10 @@ Known issues in repmgr
|
||||
the database server using the ``pg_ctl`` command may accidentally
|
||||
terminate after their associated ssh session ends.
|
||||
|
||||
* PGPASSFILE may not be passed to pg_basebackup
|
||||
|
||||
|
||||
Planned feature improvements
|
||||
============================
|
||||
|
||||
* Use 'primary' instead of 'master' in documentation and log output
|
||||
for consistency with PostgreSQL documentation. See also commit
|
||||
870b0a53b627eeb9aca1fc14cbafe25b5beafe12.
|
||||
* Timeline increases when promoting a standby
|
||||
|
||||
* A better check which standby did receive most of the data
|
||||
|
||||
@@ -21,54 +16,3 @@ Planned feature improvements
|
||||
algorithm
|
||||
|
||||
* include support for delayed standbys
|
||||
|
||||
* Create the repmgr user/database on "master register".
|
||||
|
||||
* Use pg_basebackup for the data directory, and ALSO rsync for the
|
||||
configuration files.
|
||||
|
||||
* If no configuration file supplied, search in sensible default locations
|
||||
(currently: current directory and `pg_config --sysconfdir`); if
|
||||
possible this should include the location provided by the package,
|
||||
if installed.
|
||||
|
||||
* repmgrd: if connection to the upstream node fails on startup, optionally
|
||||
retry for a certain period before giving up; this will cover cases when
|
||||
e.g. primary and standby are both starting up, and the standby comes up
|
||||
before the primary. See github issue #80.
|
||||
|
||||
* make old master node ID available for event notification commands
|
||||
(See github issue #80).
|
||||
|
||||
* repmgr standby clone: possibility to use barman instead of performing a new base backup
|
||||
|
||||
* possibility to transform a failed master into a new standby with pg_rewind
|
||||
|
||||
* "repmgr standby switchover" to promote a standby in a controlled manner
|
||||
and convert the existing primary into a standby
|
||||
|
||||
* make repmgrd more robust
|
||||
|
||||
* repmgr: when cloning a standby using pg_basebackup and replication slots are
|
||||
requested, activate the replication slot using pg_receivexlog to negate the
|
||||
need to set `wal_keep_segments` just for the initial clone (9.4 and 9.5).
|
||||
|
||||
* repmgr: enable "standby follow" to point a standby at another standby, not
|
||||
just the replication cluster master (see GitHub #130)
|
||||
|
||||
|
||||
Usability improvements
|
||||
======================
|
||||
|
||||
* repmgr: add interrupt handler, so that if the program is interrupted
|
||||
while running a backup, an attempt can be made to execute pg_stop_backup()
|
||||
on the primary, to prevent an orphaned backup state existing.
|
||||
|
||||
* repmgr: when unregistering a node, delete any entries in the repl_monitoring
|
||||
table.
|
||||
|
||||
* repmgr: for "standby unregister", accept connection parameters for the
|
||||
primary and perform metadata updates (and slot removal) directly on
|
||||
the primary, to allow a shutdown standby to be unregistered
|
||||
(currently the standby must still be running, which means the replication
|
||||
slot can't be dropped).
|
||||
|
||||
225
autofailover_quick_setup.rst
Normal file
225
autofailover_quick_setup.rst
Normal file
@@ -0,0 +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 -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 `pidoff repmgrd`
|
||||
|
||||
Usage
|
||||
=====
|
||||
|
||||
The repmgr documentation is in the README file (how to build, options, etc.)
|
||||
190
check_dir.c
190
check_dir.c
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* check_dir.c - Directories management functions
|
||||
* Copyright (C) 2ndQuadrant, 2010-2016
|
||||
* 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
|
||||
@@ -23,19 +23,14 @@
|
||||
#include <errno.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <ftw.h>
|
||||
|
||||
/* NB: postgres_fe must be included BEFORE check_dir */
|
||||
#include <libpq-fe.h>
|
||||
#include <postgres_fe.h>
|
||||
|
||||
#include "postgres_fe.h"
|
||||
#include "check_dir.h"
|
||||
|
||||
#include "strutil.h"
|
||||
#include "log.h"
|
||||
|
||||
static bool _create_pg_dir(char *dir, bool force, bool for_witness);
|
||||
static int unlink_dir_callback(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf);
|
||||
|
||||
/*
|
||||
* make sure the directory either doesn't exist or is empty
|
||||
* we use this function to check the new data directory and
|
||||
@@ -49,9 +44,9 @@ static int unlink_dir_callback(const char *fpath, const struct stat *sb, int typ
|
||||
int
|
||||
check_dir(char *dir)
|
||||
{
|
||||
DIR *chkdir;
|
||||
struct dirent *file;
|
||||
int result = 1;
|
||||
DIR *chkdir;
|
||||
struct dirent *file;
|
||||
int result = 1;
|
||||
|
||||
errno = 0;
|
||||
|
||||
@@ -63,7 +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;
|
||||
@@ -76,7 +71,6 @@ check_dir(char *dir)
|
||||
}
|
||||
|
||||
#ifdef WIN32
|
||||
|
||||
/*
|
||||
* This fix is in mingw cvs (runtime/mingwex/dirent.c rev 1.4), but not in
|
||||
* released version
|
||||
@@ -88,29 +82,29 @@ 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 with error log message when failing
|
||||
* Create directory
|
||||
*/
|
||||
bool
|
||||
create_dir(char *dir)
|
||||
create_directory(char *dir)
|
||||
{
|
||||
if (mkdir_p(dir, 0700) == 0)
|
||||
return true;
|
||||
|
||||
log_err(_("unable to create directory \"%s\": %s\n"),
|
||||
dir, strerror(errno));
|
||||
log_err(_("Could not create directory \"%s\": %s\n"),
|
||||
dir, strerror(errno));
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
bool
|
||||
set_dir_permissions(char *dir)
|
||||
set_directory_permissions(char *dir)
|
||||
{
|
||||
return (chmod(dir, 0700) != 0) ? false : true;
|
||||
}
|
||||
@@ -133,10 +127,10 @@ 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;
|
||||
@@ -155,8 +149,8 @@ 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;
|
||||
@@ -227,9 +221,9 @@ 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);
|
||||
@@ -247,103 +241,67 @@ is_pg_dir(char *dir)
|
||||
|
||||
|
||||
bool
|
||||
create_pg_dir(char *dir, bool force)
|
||||
create_pgdir(char *dir, bool force)
|
||||
{
|
||||
return _create_pg_dir(dir, force, false);
|
||||
}
|
||||
|
||||
bool
|
||||
create_witness_pg_dir(char *dir, bool force)
|
||||
{
|
||||
return _create_pg_dir(dir, force, true);
|
||||
}
|
||||
|
||||
|
||||
static bool
|
||||
_create_pg_dir(char *dir, bool force, bool for_witness)
|
||||
{
|
||||
bool pg_dir = false;
|
||||
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);
|
||||
|
||||
if (!create_dir(dir))
|
||||
{
|
||||
log_err(_("unable to 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_dir_permissions(dir))
|
||||
{
|
||||
log_err(_("unable to 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);
|
||||
|
||||
|
||||
if (pg_dir && force)
|
||||
{
|
||||
|
||||
/*
|
||||
* The witness server does not store any data other than a copy of the
|
||||
* repmgr metadata, so in --force mode we can simply overwrite the
|
||||
* directory.
|
||||
*
|
||||
* For non-witness servers, we'll leave the data in place, both to reduce
|
||||
* the risk of unintentional data loss and to make it possible for the
|
||||
* data directory to be brought up-to-date with rsync.
|
||||
*/
|
||||
if (for_witness)
|
||||
{
|
||||
log_notice(_("deleting existing data directory \"%s\"\n"), dir);
|
||||
nftw(dir, unlink_dir_callback, 64, FTW_DEPTH | FTW_PHYS);
|
||||
}
|
||||
/* Let it continue */
|
||||
break;
|
||||
}
|
||||
else if (pg_dir && !force)
|
||||
{
|
||||
log_hint(_("This looks like a PostgreSQL directory.\n"
|
||||
"If you are sure you want to clone here, "
|
||||
"please check there is no PostgreSQL server "
|
||||
"running and use the -F/--force option\n"));
|
||||
return false;
|
||||
}
|
||||
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;
|
||||
default:
|
||||
/* Trouble accessing directory */
|
||||
log_err(_("could not access directory \"%s\": %s\n"),
|
||||
dir, strerror(errno));
|
||||
}
|
||||
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 */
|
||||
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;
|
||||
}
|
||||
|
||||
static int
|
||||
unlink_dir_callback(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf)
|
||||
{
|
||||
int rv = remove(fpath);
|
||||
|
||||
if (rv)
|
||||
perror(fpath);
|
||||
|
||||
return rv;
|
||||
}
|
||||
|
||||
15
check_dir.h
15
check_dir.h
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* check_dir.h
|
||||
* Copyright (c) 2ndQuadrant, 2010-2016
|
||||
* 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
|
||||
@@ -20,12 +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_dir(char *dir);
|
||||
bool set_dir_permissions(char *dir);
|
||||
bool is_pg_dir(char *dir);
|
||||
bool create_pg_dir(char *dir, bool force);
|
||||
bool create_witness_pg_dir(char *dir, bool force);
|
||||
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);
|
||||
|
||||
#endif
|
||||
|
||||
143
config.h
143
config.h
@@ -1,7 +1,6 @@
|
||||
/*
|
||||
* config.h
|
||||
*
|
||||
* Copyright (c) 2ndQuadrant, 2010-2016
|
||||
* 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
|
||||
@@ -21,124 +20,38 @@
|
||||
#ifndef _REPMGR_CONFIG_H_
|
||||
#define _REPMGR_CONFIG_H_
|
||||
|
||||
#include "postgres_fe.h"
|
||||
|
||||
#include "repmgr.h"
|
||||
#include "strutil.h"
|
||||
|
||||
#define CONFIG_FILE_NAME "repmgr.conf"
|
||||
|
||||
typedef struct EventNotificationListCell
|
||||
{
|
||||
struct EventNotificationListCell *next;
|
||||
char event_type[MAXLEN];
|
||||
} EventNotificationListCell;
|
||||
|
||||
typedef struct EventNotificationList
|
||||
{
|
||||
EventNotificationListCell *head;
|
||||
EventNotificationListCell *tail;
|
||||
} EventNotificationList;
|
||||
|
||||
typedef struct TablespaceListCell
|
||||
{
|
||||
struct TablespaceListCell *next;
|
||||
char old_dir[MAXPGPATH];
|
||||
char new_dir[MAXPGPATH];
|
||||
} TablespaceListCell;
|
||||
|
||||
typedef struct TablespaceList
|
||||
{
|
||||
TablespaceListCell *head;
|
||||
TablespaceListCell *tail;
|
||||
} TablespaceList;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
char cluster_name[MAXLEN];
|
||||
int node;
|
||||
int upstream_node;
|
||||
char conninfo[MAXLEN];
|
||||
char barman_server[MAXLEN];
|
||||
char barman_config[MAXLEN];
|
||||
int failover;
|
||||
int priority;
|
||||
char node_name[MAXLEN];
|
||||
/* commands executed by repmgrd */
|
||||
char promote_command[MAXLEN];
|
||||
char follow_command[MAXLEN];
|
||||
/* Overrides for pg_ctl commands */
|
||||
char service_stop_command[MAXLEN];
|
||||
char service_start_command[MAXLEN];
|
||||
char service_restart_command[MAXLEN];
|
||||
char service_reload_command[MAXLEN];
|
||||
char service_promote_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_interval;
|
||||
char pg_bindir[MAXLEN];
|
||||
char pg_ctl_options[MAXLEN];
|
||||
char pg_basebackup_options[MAXLEN];
|
||||
char restore_command[MAXLEN];
|
||||
char logfile[MAXLEN];
|
||||
int monitor_interval_secs;
|
||||
int retry_promote_interval_secs;
|
||||
int witness_repl_nodes_sync_interval_secs;
|
||||
int use_replication_slots;
|
||||
char event_notification_command[MAXLEN];
|
||||
EventNotificationList event_notifications;
|
||||
TablespaceList tablespace_mapping;
|
||||
} t_configuration_options;
|
||||
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;
|
||||
|
||||
/*
|
||||
* The following will initialize the structure with a minimal set of options;
|
||||
* actual defaults are set in parse_config() before parsing the configuration file
|
||||
*/
|
||||
#define T_CONFIGURATION_OPTIONS_INITIALIZER { "", -1, NO_UPSTREAM_NODE, "", "", "", MANUAL_FAILOVER, -1, "", "", "", "", "", "", "", "", "", "", "", "", -1, -1, -1, "", "", "", "", "", 0, 0, 0, 0, "", { NULL, NULL }, { NULL, NULL } }
|
||||
#define T_CONFIGURATION_OPTIONS_INITIALIZER { "", -1, "", MANUAL_FAILOVER, -1, "", "", "", "", "", "", "", -1, -1, -1, "", "", "", 0, 0 }
|
||||
|
||||
typedef struct ItemListCell
|
||||
{
|
||||
struct ItemListCell *next;
|
||||
char *string;
|
||||
} ItemListCell;
|
||||
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);
|
||||
|
||||
typedef struct ItemList
|
||||
{
|
||||
ItemListCell *head;
|
||||
ItemListCell *tail;
|
||||
} ItemList;
|
||||
|
||||
typedef struct TablespaceDataListCell
|
||||
{
|
||||
struct TablespaceDataListCell *next;
|
||||
char *name;
|
||||
char *oid;
|
||||
char *location;
|
||||
/* optional payload */
|
||||
FILE *f;
|
||||
} TablespaceDataListCell;
|
||||
|
||||
typedef struct TablespaceDataList
|
||||
{
|
||||
TablespaceDataListCell *head;
|
||||
TablespaceDataListCell *tail;
|
||||
} TablespaceDataList;
|
||||
|
||||
void set_progname(const char *argv0);
|
||||
const char * progname(void);
|
||||
|
||||
bool load_config(const char *config_file, bool verbose, t_configuration_options *options, char *argv0);
|
||||
bool reload_config(t_configuration_options *orig_options);
|
||||
bool parse_config(t_configuration_options *options);
|
||||
void parse_line(char *buff, char *name, char *value);
|
||||
char *trim(char *s);
|
||||
void item_list_append(ItemList *item_list, char *error_message);
|
||||
int repmgr_atoi(const char *s,
|
||||
const char *config_item,
|
||||
ItemList *error_list,
|
||||
bool allow_negative);
|
||||
extern bool config_file_found;
|
||||
#endif
|
||||
|
||||
133
dbutils.h
133
dbutils.h
@@ -1,7 +1,6 @@
|
||||
/*
|
||||
* dbutils.h
|
||||
*
|
||||
* Copyright (c) 2ndQuadrant, 2010-2016
|
||||
* 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
|
||||
@@ -21,121 +20,25 @@
|
||||
#ifndef _REPMGR_DBUTILS_H_
|
||||
#define _REPMGR_DBUTILS_H_
|
||||
|
||||
#include "access/xlogdefs.h"
|
||||
#include "pqexpbuffer.h"
|
||||
|
||||
#include "config.h"
|
||||
#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);
|
||||
|
||||
typedef enum {
|
||||
UNKNOWN = 0,
|
||||
MASTER,
|
||||
STANDBY,
|
||||
WITNESS
|
||||
} t_server_type;
|
||||
const char *get_cluster_size(PGconn *conn);
|
||||
PGconn *getMasterConnection(PGconn *standby_conn, char *schema, char *cluster,
|
||||
int *master_id, char *master_conninfo_out);
|
||||
|
||||
/*
|
||||
* Struct to store node information
|
||||
*/
|
||||
typedef struct s_node_info
|
||||
{
|
||||
int node_id;
|
||||
int upstream_node_id;
|
||||
t_server_type type;
|
||||
char name[MAXLEN];
|
||||
char conninfo_str[MAXLEN];
|
||||
char slot_name[MAXLEN];
|
||||
int priority;
|
||||
bool active;
|
||||
bool is_ready;
|
||||
bool is_visible;
|
||||
XLogRecPtr xlog_location;
|
||||
} t_node_info;
|
||||
|
||||
|
||||
#define T_NODE_INFO_INITIALIZER { \
|
||||
NODE_NOT_FOUND, \
|
||||
NO_UPSTREAM_NODE, \
|
||||
UNKNOWN, \
|
||||
"", \
|
||||
"", \
|
||||
"", \
|
||||
DEFAULT_PRIORITY, \
|
||||
true, \
|
||||
false, \
|
||||
false, \
|
||||
InvalidXLogRecPtr \
|
||||
}
|
||||
|
||||
/*
|
||||
* Struct to store replication slot information
|
||||
*/
|
||||
|
||||
typedef struct s_replication_slot
|
||||
{
|
||||
char slot_name[MAXLEN];
|
||||
char slot_type[MAXLEN];
|
||||
bool active;
|
||||
} t_replication_slot;
|
||||
|
||||
extern char repmgr_schema[MAXLEN];
|
||||
|
||||
PGconn *_establish_db_connection(const char *conninfo,
|
||||
const bool exit_on_error,
|
||||
const bool log_notice,
|
||||
const bool verbose_only);
|
||||
PGconn *establish_db_connection(const char *conninfo,
|
||||
const bool exit_on_error);
|
||||
PGconn *establish_db_connection_quiet(const char *conninfo);
|
||||
PGconn *test_db_connection(const char *conninfo);
|
||||
PGconn *establish_db_connection_by_params(const char *keywords[],
|
||||
const char *values[],
|
||||
const bool exit_on_error);
|
||||
bool begin_transaction(PGconn *conn);
|
||||
bool commit_transaction(PGconn *conn);
|
||||
bool rollback_transaction(PGconn *conn);
|
||||
bool check_cluster_schema(PGconn *conn);
|
||||
int is_standby(PGconn *conn);
|
||||
bool is_pgup(PGconn *conn, int timeout);
|
||||
int get_master_node_id(PGconn *conn, char *cluster);
|
||||
int get_server_version(PGconn *conn, char *server_version);
|
||||
bool get_cluster_size(PGconn *conn, char *size);
|
||||
bool get_pg_setting(PGconn *conn, const char *setting, char *output);
|
||||
|
||||
int guc_set(PGconn *conn, const char *parameter, const char *op,
|
||||
const char *value);
|
||||
int guc_set_typed(PGconn *conn, const char *parameter, const char *op,
|
||||
const char *value, const char *datatype);
|
||||
bool get_conninfo_value(const char *conninfo, const char *keyword, char *output);
|
||||
PGconn *get_upstream_connection(PGconn *standby_conn, char *cluster,
|
||||
int node_id,
|
||||
int *upstream_node_id_ptr,
|
||||
char *upstream_conninfo_out);
|
||||
PGconn *get_master_connection(PGconn *standby_conn, 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);
|
||||
char *get_repmgr_schema(void);
|
||||
char *get_repmgr_schema_quoted(PGconn *conn);
|
||||
bool create_replication_slot(PGconn *conn, char *slot_name, int server_version_num, PQExpBufferData *error_msg);
|
||||
int get_slot_record(PGconn *conn, char *slot_name, t_replication_slot *record);
|
||||
bool drop_replication_slot(PGconn *conn, char *slot_name);
|
||||
bool start_backup(PGconn *conn, char *first_wal_segment, bool fast_checkpoint);
|
||||
bool stop_backup(PGconn *conn, char *last_wal_segment);
|
||||
bool set_config_bool(PGconn *conn, const char *config_param, bool state);
|
||||
bool witness_copy_node_records(PGconn *masterconn, PGconn *witnessconn, char *cluster_name);
|
||||
bool create_node_record(PGconn *conn, char *action, int node, char *type, int upstream_node, char *cluster_name, char *node_name, char *conninfo, int priority, char *slot_name, bool active);
|
||||
bool delete_node_record(PGconn *conn, int node, char *action);
|
||||
int get_node_record(PGconn *conn, char *cluster, int node_id, t_node_info *node_info);
|
||||
int get_node_record_by_name(PGconn *conn, char *cluster, const char *node_name, t_node_info *node_info);
|
||||
bool update_node_record_status(PGconn *conn, char *cluster_name, int this_node_id, char *type, int upstream_node_id, bool active);
|
||||
bool update_node_record_set_upstream(PGconn *conn, char *cluster_name, int this_node_id, int new_upstream_node_id);
|
||||
bool create_event_record(PGconn *conn, t_configuration_options *options, int node_id, char *event, bool successful, char *details);
|
||||
|
||||
int get_node_replication_state(PGconn *conn, char *node_name, char *output);
|
||||
t_server_type parse_node_type(const char *type);
|
||||
int get_data_checksum_version(const char *data_directory);
|
||||
int wait_connection_availability(PGconn *conn, long long timeout);
|
||||
bool CancelQuery(PGconn *conn, int timeout);
|
||||
#endif
|
||||
|
||||
|
||||
6
debian/DEBIAN/control
vendored
6
debian/DEBIAN/control
vendored
@@ -1,9 +1,9 @@
|
||||
Package: repmgr-auto
|
||||
Version: 3.2dev
|
||||
Version: 2.0beta2
|
||||
Section: database
|
||||
Priority: optional
|
||||
Architecture: all
|
||||
Depends: rsync, postgresql-9.3 | postgresql-9.4 | postgresql-9.5
|
||||
Maintainer: Self built package <user@localhost>
|
||||
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
|
||||
|
||||
32
debian/repmgr.repmgrd.default
vendored
32
debian/repmgr.repmgrd.default
vendored
@@ -1,18 +1,14 @@
|
||||
# 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
|
||||
#REPMGRD_BIN=/usr/bin/repmgrd
|
||||
|
||||
# pid file
|
||||
#REPMGRD_PIDFILE=/var/run/repmgrd.pid
|
||||
#!/bin/sh
|
||||
# default settings for repmgrd. This file is source by /bin/sh from
|
||||
# /etc/init.d/repmgrd
|
||||
|
||||
# Options for repmgrd
|
||||
REPMGRD_OPTS=""
|
||||
|
||||
# repmgrd binary
|
||||
REPMGR_BIN="/usr/bin/repmgr"
|
||||
|
||||
# pid file
|
||||
REPMGR_PIDFILE="/var/run/repmgrd.pid"
|
||||
|
||||
|
||||
|
||||
149
debian/repmgr.repmgrd.init
vendored
149
debian/repmgr.repmgrd.init
vendored
@@ -1,101 +1,48 @@
|
||||
#!/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 $REPMGRD_PIDFILE --name "$(basename $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
|
||||
#!/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
|
||||
# Should-Start: $syslog $postgresql
|
||||
# Default-Start: 2 3 4 5
|
||||
# Default-Stop: 0 1 6
|
||||
# Short-Description: Start/stop repmgrd
|
||||
### END INIT INFO
|
||||
|
||||
set -e
|
||||
|
||||
if test -f /etc/default/repmgrd; then
|
||||
. /etc/default/repmgrd
|
||||
fi
|
||||
|
||||
if [ -z "$REPMGRD_BIN" ]; then
|
||||
REPMGRD_BIN="/usr/bin/repmgrd"
|
||||
fi
|
||||
|
||||
if [ -z "$REPMGRD_PIDFILE" ]; then
|
||||
REPMGRD_PIDFILE="/var/run/repmgrd.pid"
|
||||
fi
|
||||
|
||||
test -x $REPMGRD_BIN || exit 0
|
||||
|
||||
case "$1" in
|
||||
start)
|
||||
start-stop-daemon --start --quiet --make-pidfile --pidfile $REPMGRD_PIDFILE --exec $REPMGRD_BIN $REPMGRD_OPTS
|
||||
;;
|
||||
|
||||
stop)
|
||||
start-stop-daemon --stop --oknodo --quiet --pidfile $REPMGRD_PIDFILE
|
||||
;;
|
||||
|
||||
restart)
|
||||
$0 stop && $0 start || exit 1
|
||||
;;
|
||||
|
||||
*)
|
||||
echo "Usage: $0 {start|stop|restart}"
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
|
||||
exit 0
|
||||
|
||||
194
dirmod.c
194
dirmod.c
@@ -1,194 +0,0 @@
|
||||
/*
|
||||
*
|
||||
* dirmod.c
|
||||
* directory handling functions
|
||||
*
|
||||
* Copyright (C) 2ndQuadrant, 2010-2016
|
||||
*
|
||||
* Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
*/
|
||||
|
||||
#include "postgres_fe.h"
|
||||
|
||||
/* Don't modify declarations in system headers */
|
||||
|
||||
#include <unistd.h>
|
||||
#include <dirent.h>
|
||||
#include <sys/stat.h>
|
||||
|
||||
/*
|
||||
* pgfnames
|
||||
*
|
||||
* return a list of the names of objects in the argument directory. Caller
|
||||
* must call pgfnames_cleanup later to free the memory allocated by this
|
||||
* function.
|
||||
*/
|
||||
char **
|
||||
pgfnames(const char *path)
|
||||
{
|
||||
DIR *dir;
|
||||
struct dirent *file;
|
||||
char **filenames;
|
||||
int numnames = 0;
|
||||
int fnsize = 200; /* enough for many small dbs */
|
||||
|
||||
dir = opendir(path);
|
||||
if (dir == NULL)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
filenames = (char **) palloc(fnsize * sizeof(char *));
|
||||
|
||||
while (errno = 0, (file = readdir(dir)) != NULL)
|
||||
{
|
||||
if (strcmp(file->d_name, ".") != 0 && strcmp(file->d_name, "..") != 0)
|
||||
{
|
||||
if (numnames + 1 >= fnsize)
|
||||
{
|
||||
fnsize *= 2;
|
||||
filenames = (char **) repalloc(filenames,
|
||||
fnsize * sizeof(char *));
|
||||
}
|
||||
filenames[numnames++] = pstrdup(file->d_name);
|
||||
}
|
||||
}
|
||||
|
||||
if (errno)
|
||||
{
|
||||
fprintf(stderr, _("could not read directory \"%s\": %s\n"),
|
||||
path, strerror(errno));
|
||||
}
|
||||
|
||||
filenames[numnames] = NULL;
|
||||
|
||||
if (closedir(dir))
|
||||
{
|
||||
fprintf(stderr, _("could not close directory \"%s\": %s\n"),
|
||||
path, strerror(errno));
|
||||
}
|
||||
|
||||
return filenames;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* pgfnames_cleanup
|
||||
*
|
||||
* deallocate memory used for filenames
|
||||
*/
|
||||
void
|
||||
pgfnames_cleanup(char **filenames)
|
||||
{
|
||||
char **fn;
|
||||
|
||||
for (fn = filenames; *fn; fn++)
|
||||
pfree(*fn);
|
||||
|
||||
pfree(filenames);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* rmtree
|
||||
*
|
||||
* Delete a directory tree recursively.
|
||||
* Assumes path points to a valid directory.
|
||||
* Deletes everything under path.
|
||||
* If rmtopdir is true deletes the directory too.
|
||||
* Returns true if successful, false if there was any problem.
|
||||
* (The details of the problem are reported already, so caller
|
||||
* doesn't really have to say anything more, but most do.)
|
||||
*/
|
||||
bool
|
||||
rmtree(const char *path, bool rmtopdir)
|
||||
{
|
||||
bool result = true;
|
||||
char pathbuf[MAXPGPATH];
|
||||
char **filenames;
|
||||
char **filename;
|
||||
struct stat statbuf;
|
||||
|
||||
/*
|
||||
* we copy all the names out of the directory before we start modifying
|
||||
* it.
|
||||
*/
|
||||
filenames = pgfnames(path);
|
||||
|
||||
if (filenames == NULL)
|
||||
return false;
|
||||
|
||||
/* now we have the names we can start removing things */
|
||||
for (filename = filenames; *filename; filename++)
|
||||
{
|
||||
snprintf(pathbuf, MAXPGPATH, "%s/%s", path, *filename);
|
||||
|
||||
/*
|
||||
* It's ok if the file is not there anymore; we were just about to
|
||||
* delete it anyway.
|
||||
*
|
||||
* This is not an academic possibility. One scenario where this
|
||||
* happens is when bgwriter has a pending unlink request for a file in
|
||||
* a database that's being dropped. In dropdb(), we call
|
||||
* ForgetDatabaseFsyncRequests() to flush out any such pending unlink
|
||||
* requests, but because that's asynchronous, it's not guaranteed that
|
||||
* the bgwriter receives the message in time.
|
||||
*/
|
||||
if (lstat(pathbuf, &statbuf) != 0)
|
||||
{
|
||||
if (errno != ENOENT)
|
||||
{
|
||||
result = false;
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
if (S_ISDIR(statbuf.st_mode))
|
||||
{
|
||||
/* call ourselves recursively for a directory */
|
||||
if (!rmtree(pathbuf, true))
|
||||
{
|
||||
/* we already reported the error */
|
||||
result = false;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if (unlink(pathbuf) != 0)
|
||||
{
|
||||
if (errno != ENOENT)
|
||||
{
|
||||
result = false;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (rmtopdir)
|
||||
{
|
||||
if (rmdir(path) != 0)
|
||||
{
|
||||
result = false;
|
||||
}
|
||||
}
|
||||
|
||||
pgfnames_cleanup(filenames);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
23
dirmod.h
23
dirmod.h
@@ -1,23 +0,0 @@
|
||||
/*
|
||||
* dirmod.h
|
||||
* Copyright (c) 2ndQuadrant, 2010-2016
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _DIRMOD_H_
|
||||
#define _DIRMOD_H_
|
||||
|
||||
#endif
|
||||
@@ -1,75 +0,0 @@
|
||||
repmgrd's failover algorithm
|
||||
============================
|
||||
|
||||
When implementing automatic failover, there are two factors which are critical in
|
||||
ensuring the desired result is achieved:
|
||||
|
||||
- has the master node genuinely failed?
|
||||
- which is the best node to promote to the new master?
|
||||
|
||||
This document outlines repmgrd's decision-making process during automatic failover
|
||||
for standbys directly connected to the master node.
|
||||
|
||||
|
||||
Master node failure detection
|
||||
-----------------------------
|
||||
|
||||
If a `repmgrd` instance running on a PostgreSQL standby node is unable to connect to
|
||||
the master node, this doesn't neccesarily mean that the master is down and a
|
||||
failover is required. Factors such as network connectivity issues could mean that
|
||||
even though the standby node is isolated, the replication cluster as a whole
|
||||
is functioning correctly, and promoting the standby without further verification
|
||||
could result in a "split-brain" situation.
|
||||
|
||||
In the event that `repmgrd` is unable to connect to the master node, it will attempt
|
||||
to reconnect to the master server several times (as defined by the `reconnect_attempts`
|
||||
parameter in `repmgr.conf`), with reconnection attempts occuring at the interval
|
||||
specified by `reconnect_interval`. This happens to verify that the master is definitively
|
||||
not accessible (e.g. that connection was not lost due to a brief network glitch).
|
||||
|
||||
Appropriate values for these settings will depend very much on the replication
|
||||
cluster environment. There will necessarily be a trade-off between the time it
|
||||
takes to assume the master is not reachable, and the reliability of that conclusion.
|
||||
A standby in a different physical location to the master will probably need a longer
|
||||
check interval to rule out possible network issues, whereas one located in the same
|
||||
rack with a direct connection between servers could perform the check very quickly.
|
||||
|
||||
Note that it's possible the master comes back online after this point is reached,
|
||||
but before a new master has been selected; in this case it will be noticed
|
||||
during the selection of a new master and no actual failover will take place.
|
||||
|
||||
Promotion candidate selection
|
||||
-----------------------------
|
||||
|
||||
Once `repmgrd` has decided the master is definitively unreachable, following checks
|
||||
will be carried out:
|
||||
|
||||
* attempts to connect to all other nodes in the cluster (including the witness
|
||||
node, if defined) to establish the state of the cluster, including their
|
||||
current LSN
|
||||
|
||||
* If less than half of the nodes are visible (from the viewpoint
|
||||
of this node), `repmgrd` will not take any further action. This is to ensure that
|
||||
e.g. if a replication cluster is spread over multiple data centres, a split-brain
|
||||
situation does not occur if there is a network failure between datacentres. Note
|
||||
that if nodes are split evenly between data centres, a witness server can be
|
||||
used to establish the "majority" daat centre.
|
||||
|
||||
* `repmgrd` polls all visible servers and waits for each node to return a valid LSN;
|
||||
it updates the LSN previously stored for this node if it has increased since
|
||||
the initial check
|
||||
|
||||
* once all LSNs have been retrieved, `repmgrd` will check for the highest LSN; if
|
||||
its own node has the highest LSN, it will attempt to promote itself (using the
|
||||
command defined in `promote_command` in `repmgr.conf`. Note that if using
|
||||
`repmgr standby promote` as the promotion command, and the original master becomes available
|
||||
before the promotion takes effect, `repmgr` will return an error and no promotion
|
||||
will take place, and `repmgrd` will resume monitoring as usual.
|
||||
|
||||
* if the node is not the promotion candidate, `repmgrd` will execute the
|
||||
`follow_command` defined in `repmgr.conf`. If using `repmgr standby follow` here,
|
||||
`repmgr` will attempt to detect the new master node and attach to that.
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -1,150 +0,0 @@
|
||||
Fencing a failed master node with repmgrd and pgbouncer
|
||||
=======================================================
|
||||
|
||||
With automatic failover, it's essential to ensure that a failed master
|
||||
remains inaccessible to your application, even if it comes back online
|
||||
again, to avoid a split-brain situation.
|
||||
|
||||
By using `pgbouncer` together with `repmgrd`, it's possible to combine
|
||||
automatic failover with a process to isolate the failed master from
|
||||
your application and ensure that all connections which should go to
|
||||
the master are directed there smoothly without having to reconfigure
|
||||
your application. (Note that as a connection pooler, `pgbouncer` can
|
||||
benefit your application in other ways, but those are beyond the scope
|
||||
of this document).
|
||||
|
||||
* * *
|
||||
|
||||
> *WARNING*: automatic failover is tricky to get right. This document
|
||||
> demonstrates one possible implementation method, however you should
|
||||
> carefully configure and test any setup to suit the needs of your own
|
||||
> replication cluster/application.
|
||||
|
||||
* * *
|
||||
|
||||
In a failover situation, `repmgrd` promotes a standby to master by
|
||||
executing the command defined in `promote_command`. Normally this
|
||||
would be something like:
|
||||
|
||||
repmgr standby promote -f /etc/repmgr.conf
|
||||
|
||||
By wrapping this in a custom script which adjusts the `pgbouncer`
|
||||
configuration on all nodes, it's possible to fence the failed master
|
||||
and redirect write connections to the new master.
|
||||
|
||||
The script consists of three sections:
|
||||
|
||||
* commands to pause `pgbouncer` on all nodes
|
||||
* the promotion command itself
|
||||
* commands to reconfigure and restart `pgbouncer` on all nodes
|
||||
|
||||
Note that it requires password-less SSH access between all nodes to be
|
||||
able to update the `pgbouncer` configuration files.
|
||||
|
||||
For the purposes of this demonstration, we'll assume there are 3 nodes
|
||||
(master and two standbys), with `pgbouncer` listening on port 6432
|
||||
handling connections to a database called `appdb`. The `postgres`
|
||||
system user must have write access to the `pgbouncer` configuration
|
||||
file on all nodes, assumed to be at `/etc/pgbouncer.ini`.
|
||||
|
||||
The script also requires a template file containing global `pgbouncer`
|
||||
configuration, which should looks something like this (adjust
|
||||
settings appropriately for your environment):
|
||||
|
||||
`/var/lib/postgres/repmgr/pgbouncer.ini.template`
|
||||
|
||||
[pgbouncer]
|
||||
|
||||
logfile = /var/log/pgbouncer/pgbouncer.log
|
||||
pidfile = /var/run/pgbouncer/pgbouncer.pid
|
||||
|
||||
listen_addr = *
|
||||
listen_port = 6532
|
||||
unix_socket_dir = /tmp
|
||||
|
||||
auth_type = trust
|
||||
auth_file = /etc/pgbouncer.auth
|
||||
|
||||
admin_users = postgres
|
||||
stats_users = postgres
|
||||
|
||||
pool_mode = transaction
|
||||
|
||||
max_client_conn = 100
|
||||
default_pool_size = 20
|
||||
min_pool_size = 5
|
||||
reserve_pool_size = 5
|
||||
reserve_pool_timeout = 3
|
||||
|
||||
log_connections = 1
|
||||
log_disconnections = 1
|
||||
log_pooler_errors = 1
|
||||
|
||||
The actual script is as follows; adjust the configurable items as appropriate:
|
||||
|
||||
`/var/lib/postgres/repmgr/promote.sh`
|
||||
|
||||
|
||||
#!/usr/bin/env bash
|
||||
set -u
|
||||
set -e
|
||||
|
||||
# Configurable items
|
||||
PGBOUNCER_HOSTS="node1 node2 node3"
|
||||
REPMGR_DB="repmgr"
|
||||
REPMGR_USER="repmgr"
|
||||
REPMGR_SCHEMA="repmgr_test"
|
||||
PGBOUNCER_CONFIG="/etc/pgbouncer.ini"
|
||||
PGBOUNCER_INI_TEMPLATE="/var/lib/postgres/repmgr/pgbouncer.ini.template"
|
||||
PGBOUNCER_DATABASE="appdb"
|
||||
|
||||
# 1. Pause running pgbouncer instances
|
||||
for HOST in $PGBOUNCER_HOSTS
|
||||
do
|
||||
psql -t -c "pause" -h $HOST -p $PORT -U postgres pgbouncer
|
||||
done
|
||||
|
||||
|
||||
# 2. Promote this node from standby to master
|
||||
|
||||
repmgr standby promote -f /etc/repmgr.conf
|
||||
|
||||
|
||||
# 3. Reconfigure pgbouncer instances
|
||||
|
||||
PGBOUNCER_INI_NEW="/tmp/pgbouncer.ini.new"
|
||||
|
||||
for HOST in $PGBOUNCER_HOSTS
|
||||
do
|
||||
# Recreate the pgbouncer config file
|
||||
echo -e "[databases]\n" > $PGBOUNCER_INI_NEW
|
||||
|
||||
psql -d $REPMGR_DB -U $REPMGR_USER -t -A \
|
||||
-c "SELECT '$PGBOUNCER_DATABASE= ' || conninfo || ' application_name=pgbouncer_$HOST' \
|
||||
FROM $REPMGR_SCHEMA.repl_nodes \
|
||||
WHERE active = TRUE AND type='master'" >> $PGBOUNCER_INI_NEW
|
||||
|
||||
cat $PGBOUNCER_INI_TEMPLATE >> $PGBOUNCER_INI_NEW
|
||||
|
||||
rsync $PGBOUNCER_INI_NEW $HOST:$PGBOUNCER_CONFIG
|
||||
|
||||
psql -tc "reload" -h $HOST -U postgres pgbouncer
|
||||
psql -tc "resume" -h $HOST -U postgres pgbouncer
|
||||
|
||||
done
|
||||
|
||||
# Clean up generated file
|
||||
rm $PGBOUNCER_INI_NEW
|
||||
|
||||
echo "Reconfiguration of pgbouncer complete"
|
||||
|
||||
Script and template file should be installed on each node where
|
||||
`repmgrd` is running.
|
||||
|
||||
Finally, set `promote_command` in `repmgr.conf` on each node to
|
||||
point to the custom promote script:
|
||||
|
||||
promote_command=/var/lib/postgres/repmgr/promote.sh
|
||||
|
||||
and reload/restart any running `repmgrd` instances for the changes to take
|
||||
effect.
|
||||
17
errcode.h
17
errcode.h
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* errcode.h
|
||||
* Copyright (C) 2ndQuadrant, 2010-2016
|
||||
* 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
|
||||
@@ -25,21 +25,16 @@
|
||||
#define SUCCESS 0
|
||||
#define ERR_BAD_CONFIG 1
|
||||
#define ERR_BAD_RSYNC 2
|
||||
#define ERR_STOP_BACKUP 3
|
||||
#define ERR_NO_RESTART 4
|
||||
#define ERR_NEEDS_XLOG 5
|
||||
#define ERR_DB_CON 6
|
||||
#define ERR_DB_QUERY 7
|
||||
#define ERR_PROMOTED 8
|
||||
#define ERR_BAD_PASSWORD 9
|
||||
#define ERR_STR_OVERFLOW 10
|
||||
#define ERR_FAILOVER_FAIL 11
|
||||
#define ERR_BAD_SSH 12
|
||||
#define ERR_BAD_SSH 12
|
||||
#define ERR_SYS_FAILURE 13
|
||||
#define ERR_BAD_BASEBACKUP 14
|
||||
#define ERR_INTERNAL 15
|
||||
#define ERR_MONITORING_FAIL 16
|
||||
#define ERR_BAD_BACKUP_LABEL 17
|
||||
#define ERR_SWITCHOVER_FAIL 18
|
||||
#define ERR_BARMAN 19
|
||||
#define ERR_REGISTRATION_SYNC 20
|
||||
|
||||
|
||||
#endif /* _ERRCODE_H_ */
|
||||
#endif /* _ERRCODE_H_ */
|
||||
|
||||
263
log.c
263
log.c
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* log.c - Logging methods
|
||||
* Copyright (C) 2ndQuadrant, 2010-2016
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
* This module is a set of methods for logging (currently only syslog)
|
||||
*
|
||||
@@ -39,119 +39,45 @@
|
||||
|
||||
/* #define REPMGR_DEBUG */
|
||||
|
||||
static int detect_log_facility(const char *facility);
|
||||
static void _stderr_log_with_level(const char *level_name, int level, const char *fmt, va_list ap)
|
||||
__attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 0)));
|
||||
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;
|
||||
|
||||
int log_type = REPMGR_STDERR;
|
||||
int log_level = LOG_NOTICE;
|
||||
int last_log_level = LOG_NOTICE;
|
||||
int verbose_logging = false;
|
||||
int terse_logging = false;
|
||||
|
||||
extern void
|
||||
stderr_log_with_level(const char *level_name, int level, const char *fmt, ...)
|
||||
{
|
||||
va_list arglist;
|
||||
|
||||
va_start(arglist, fmt);
|
||||
_stderr_log_with_level(level_name, level, fmt, arglist);
|
||||
va_end(arglist);
|
||||
}
|
||||
|
||||
static void
|
||||
_stderr_log_with_level(const char *level_name, int level, const char *fmt, va_list ap)
|
||||
{
|
||||
time_t t;
|
||||
struct tm *tm;
|
||||
char buff[100];
|
||||
|
||||
/*
|
||||
* Store the requested level so that if there's a subsequent
|
||||
* log_hint(), we can suppress that if appropriate.
|
||||
*/
|
||||
last_log_level = level;
|
||||
|
||||
if (log_level >= level)
|
||||
{
|
||||
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);
|
||||
|
||||
vfprintf(stderr, fmt, ap);
|
||||
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);
|
||||
|
||||
va_end(ap);
|
||||
|
||||
fflush(stderr);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
log_hint(const char *fmt, ...)
|
||||
|
||||
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)
|
||||
{
|
||||
va_list ap;
|
||||
|
||||
if (terse_logging == false)
|
||||
{
|
||||
va_start(ap, fmt);
|
||||
_stderr_log_with_level("HINT", last_log_level, fmt, ap);
|
||||
va_end(ap);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
log_verbose(int level, const char *fmt, ...)
|
||||
{
|
||||
va_list ap;
|
||||
|
||||
va_start(ap, fmt);
|
||||
|
||||
if (verbose_logging == true)
|
||||
{
|
||||
switch(level)
|
||||
{
|
||||
case LOG_EMERG:
|
||||
_stderr_log_with_level("EMERG", level, fmt, ap);
|
||||
break;
|
||||
case LOG_ALERT:
|
||||
_stderr_log_with_level("ALERT", level, fmt, ap);
|
||||
break;
|
||||
case LOG_CRIT:
|
||||
_stderr_log_with_level("CRIT", level, fmt, ap);
|
||||
break;
|
||||
case LOG_ERR:
|
||||
_stderr_log_with_level("ERR", level, fmt, ap);
|
||||
break;
|
||||
case LOG_WARNING:
|
||||
_stderr_log_with_level("WARNING", level, fmt, ap);
|
||||
break;
|
||||
case LOG_NOTICE:
|
||||
_stderr_log_with_level("NOTICE", level, fmt, ap);
|
||||
break;
|
||||
case LOG_INFO:
|
||||
_stderr_log_with_level("INFO", level, fmt, ap);
|
||||
break;
|
||||
case LOG_DEBUG:
|
||||
_stderr_log_with_level("DEBUG", level, fmt, ap);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
va_end(ap);
|
||||
}
|
||||
|
||||
|
||||
bool
|
||||
logger_init(t_configuration_options *opts, const char *ident)
|
||||
{
|
||||
char *level = opts->loglevel;
|
||||
char *facility = opts->logfacility;
|
||||
|
||||
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
|
||||
@@ -170,10 +96,10 @@ logger_init(t_configuration_options *opts, const char *ident)
|
||||
printf("Assigned level for logger: %d\n", l);
|
||||
#endif
|
||||
|
||||
if (l >= 0)
|
||||
if (l > 0)
|
||||
log_level = l;
|
||||
else
|
||||
stderr_log_warning(_("Invalid log level \"%s\" (available values: DEBUG, INFO, NOTICE, WARNING, ERR, ALERT, CRIT or EMERG)\n"), level);
|
||||
stderr_log_warning(_("Cannot detect log level %s (use any of DEBUG, INFO, NOTICE, WARNING, ERR, ALERT, CRIT or EMERG)\n"), level);
|
||||
}
|
||||
|
||||
if (facility && *facility)
|
||||
@@ -208,53 +134,26 @@ logger_init(t_configuration_options *opts, const char *ident)
|
||||
|
||||
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;
|
||||
|
||||
/* Check if we can write to the specified file before redirecting
|
||||
* stderr - if freopen() fails, stderr output will vanish into
|
||||
* the ether and the user won't know what's going on.
|
||||
*/
|
||||
|
||||
fd = fopen(opts->logfile, "a");
|
||||
if (fd == NULL)
|
||||
{
|
||||
stderr_log_err(_("Unable to open specified logfile '%s' for writing: %s\n"), opts->logfile, strerror(errno));
|
||||
stderr_log_err(_("Terminating\n"));
|
||||
exit(ERR_BAD_CONFIG);
|
||||
}
|
||||
fclose(fd);
|
||||
|
||||
stderr_log_notice(_("Redirecting logging output to '%s'\n"), opts->logfile);
|
||||
fd = freopen(opts->logfile, "a", stderr);
|
||||
|
||||
/* It's possible freopen() may still fail due to e.g. a race condition;
|
||||
as it's not feasible to restore stderr after a failed freopen(),
|
||||
we'll write to stdout as a last resort.
|
||||
*/
|
||||
if (fd == NULL)
|
||||
{
|
||||
printf(_("Unable to open specified logfile %s for writing: %s\n"), opts->logfile, strerror(errno));
|
||||
printf(_("Terminating\n"));
|
||||
exit(ERR_BAD_CONFIG);
|
||||
}
|
||||
freopen(opts->logfile, "a", stderr);
|
||||
}
|
||||
|
||||
return true;
|
||||
|
||||
}
|
||||
|
||||
|
||||
bool
|
||||
logger_shutdown(void)
|
||||
bool logger_shutdown(void)
|
||||
{
|
||||
|
||||
#ifdef HAVE_SYSLOG
|
||||
if (log_type == REPMGR_SYSLOG)
|
||||
closelog();
|
||||
@@ -264,34 +163,17 @@ logger_shutdown(void)
|
||||
}
|
||||
|
||||
/*
|
||||
* Indicate whether extra-verbose logging is required. This will
|
||||
* generate a lot of output, particularly debug logging, and should
|
||||
* not be permanently enabled in production.
|
||||
*
|
||||
* NOTE: in previous repmgr versions, this option forced the log
|
||||
* level to INFO.
|
||||
* Set a minimum logging level. Intended for command line verbosity
|
||||
* options, which might increase requested logging over what's specified
|
||||
* in the regular configuration file.
|
||||
*/
|
||||
void
|
||||
logger_set_verbose(void)
|
||||
void logger_min_verbose(int minimum)
|
||||
{
|
||||
verbose_logging = true;
|
||||
if (log_level < minimum)
|
||||
log_level = minimum;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Indicate whether some non-critical log messages can be omitted.
|
||||
* Currently this includes warnings about irrelevant command line
|
||||
* options and hints.
|
||||
*/
|
||||
|
||||
void logger_set_terse(void)
|
||||
{
|
||||
terse_logging = true;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
detect_log_level(const char *level)
|
||||
int detect_log_level(const char* level)
|
||||
{
|
||||
if (!strcmp(level, "DEBUG"))
|
||||
return LOG_DEBUG;
|
||||
@@ -310,44 +192,43 @@ detect_log_level(const char *level)
|
||||
if (!strcmp(level, "EMERG"))
|
||||
return LOG_EMERG;
|
||||
|
||||
return -1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static 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;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
49
log.h
49
log.h
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* log.h
|
||||
* Copyright (c) 2ndQuadrant, 2010-2016
|
||||
* 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
|
||||
@@ -25,9 +25,7 @@
|
||||
#define REPMGR_SYSLOG 1
|
||||
#define REPMGR_STDERR 2
|
||||
|
||||
extern 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__)
|
||||
@@ -90,16 +88,17 @@ __attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 4)));
|
||||
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__)
|
||||
@@ -109,28 +108,16 @@ __attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 4)));
|
||||
#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
|
||||
|
||||
|
||||
int detect_log_level(const char *level);
|
||||
|
||||
/* 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_init(t_configuration_options * opts, const char *ident);
|
||||
extern int log_type;
|
||||
extern int log_level;
|
||||
|
||||
bool logger_shutdown(void);
|
||||
|
||||
void logger_set_verbose(void);
|
||||
void logger_set_terse(void);
|
||||
|
||||
void log_hint(const char *fmt, ...)
|
||||
__attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2)));
|
||||
void log_verbose(int level, const char *fmt, ...)
|
||||
__attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 3)));
|
||||
|
||||
extern int log_type;
|
||||
extern int log_level;
|
||||
extern int verbose_logging;
|
||||
extern int terse_logging;
|
||||
|
||||
#endif /* _REPMGR_LOG_H_ */
|
||||
#endif
|
||||
|
||||
@@ -1,200 +1,62 @@
|
||||
###################################################
|
||||
# Replication Manager sample configuration file
|
||||
# Replication Manager configuration file
|
||||
###################################################
|
||||
|
||||
# Some configuration items will be set with a default value; this
|
||||
# is noted for each item. Where no default value is shown, the
|
||||
# parameter will be treated as empty or false.
|
||||
# Cluster name
|
||||
cluster=test
|
||||
|
||||
# Required configuration items
|
||||
# ============================
|
||||
#
|
||||
# repmgr and repmgrd require these items to be configured:
|
||||
# Node ID
|
||||
node=2
|
||||
node_name=standby2
|
||||
|
||||
# Cluster name - this will be used by repmgr to generate its internal
|
||||
# schema (pattern: "repmgr_{cluster}"); while this name will be quoted
|
||||
# to preserve case, we recommend using lower case and avoiding whitespace
|
||||
# to facilitate easier querying of the repmgr views and tables.
|
||||
#cluster=example_cluster
|
||||
# Connection information
|
||||
conninfo='host=192.168.204.104'
|
||||
rsync_options=--archive --checksum --compress --progress --rsh="ssh -o \"StrictHostKeyChecking no\""
|
||||
ssh_options=-o "StrictHostKeyChecking no"
|
||||
|
||||
# Node ID and name
|
||||
# (Note: we recommend to avoid naming nodes after their initial
|
||||
# replication function, as this will cause confusion when e.g.
|
||||
# "standby2" is promoted to primary)
|
||||
#node=2 # a unique integer
|
||||
#node_name=node2 # an arbitrary (but unique) string; we recommend using
|
||||
# the server's hostname or another identifier unambiguously
|
||||
# associated with the server to avoid confusion
|
||||
# How many seconds we wait for master response before declaring master failure
|
||||
master_response_timeout=60
|
||||
|
||||
# Database connection information as a conninfo string
|
||||
# This must be accessible to all servers in the cluster; for details see:
|
||||
#
|
||||
# https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
|
||||
#
|
||||
#conninfo='host=192.168.204.104 dbname=repmgr user=repmgr'
|
||||
#
|
||||
# If repmgrd is in use, consider explicitly setting `connect_timeout` in the
|
||||
# conninfo string to determine the length of time which elapses before
|
||||
# a network connection attempt is abandoned; for details see:
|
||||
#
|
||||
# https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNECT-CONNECT-TIMEOUT
|
||||
|
||||
# Optional configuration items
|
||||
# ============================
|
||||
|
||||
# Replication settings
|
||||
# ---------------------
|
||||
|
||||
# When using cascading replication, a standby can connect to another
|
||||
# upstream standby node which is specified by setting 'upstream_node'.
|
||||
# In that case, the upstream node must exist before the new standby
|
||||
# can be registered. If 'upstream_node' is not set, then the standby
|
||||
# will connect directly to the primary node.
|
||||
#upstream_node=1
|
||||
|
||||
# use physical replication slots - PostgreSQL 9.4 and later only
|
||||
# (default: 0)
|
||||
#use_replication_slots=0
|
||||
|
||||
# NOTE: 'max_replication_slots' should be configured for at least the
|
||||
# number of standbys which will connect to the primary.
|
||||
|
||||
# Logging and monitoring settings
|
||||
# -------------------------------
|
||||
|
||||
# Log level: possible values are DEBUG, INFO, NOTICE, WARNING, ERR, ALERT, CRIT or EMERG
|
||||
# (default: NOTICE)
|
||||
#loglevel=NOTICE
|
||||
|
||||
# Logging facility: possible values are STDERR or - for Syslog integration - one of LOCAL0, LOCAL1, ..., LOCAL7, USER
|
||||
# (default: STDERR)
|
||||
#logfacility=STDERR
|
||||
|
||||
# stderr can be redirected to an arbitrary file:
|
||||
#
|
||||
#logfile='/var/log/repmgr/repmgr.log'
|
||||
|
||||
# event notifications can be passed to an arbitrary external program
|
||||
# together with the following parameters:
|
||||
#
|
||||
# %n - node ID
|
||||
# %e - event type
|
||||
# %s - success (1 or 0)
|
||||
# %t - timestamp
|
||||
# %d - details
|
||||
#
|
||||
# the values provided for "%t" and "%d" will probably contain spaces,
|
||||
# so should be quoted in the provided command configuration, e.g.:
|
||||
#
|
||||
#event_notification_command='/path/to/some/script %n %e %s "%t" "%d"'
|
||||
|
||||
# By default, all notifications will be passed; the notification types
|
||||
# can be filtered to explicitly named ones:
|
||||
#
|
||||
#event_notifications=master_register,standby_register,witness_create
|
||||
|
||||
|
||||
# Environment/command settings
|
||||
# ----------------------------
|
||||
|
||||
# path to PostgreSQL binary directory (location of pg_ctl, pg_basebackup etc.)
|
||||
# (if not provided, defaults to system $PATH)
|
||||
#pg_bindir=/usr/bin/
|
||||
#
|
||||
# Debian/Ubuntu users: you will probably need to set this to the directory
|
||||
# where `pg_ctl` is located, e.g. /usr/lib/postgresql/9.5/bin/
|
||||
|
||||
# service control commands
|
||||
#
|
||||
# repmgr provides options to override the default pg_ctl commands
|
||||
# used to stop, start, restart, reload and promote the PostgreSQL cluster
|
||||
#
|
||||
# NOTE: These commands must be runnable on remote nodes as well for switchover
|
||||
# to function correctly.
|
||||
#
|
||||
# If you use sudo, the user repmgr runs as (usually 'postgres') must have
|
||||
# passwordless sudo access to execute the command
|
||||
#
|
||||
# For example, to use systemd, you may use the following configuration:
|
||||
#
|
||||
# # this is required when running sudo over ssh without -t:
|
||||
# Defaults:postgres !requiretty
|
||||
# postgres ALL = NOPASSWD: /usr/bin/systemctl stop postgresql-9.5, \
|
||||
# /usr/bin/systemctl start postgresql-9.5, \
|
||||
# /usr/bin/systemctl restart postgresql-9.5
|
||||
#
|
||||
# service_start_command = systemctl start postgresql-9.5
|
||||
# service_stop_command = systemctl stop postgresql-9.5
|
||||
# service_restart_command = systemctl restart postgresql-9.5
|
||||
# service_reload_command = pg_ctlcluster 9.5 main reload
|
||||
# service_promote_command = pg_ctlcluster 9.5 main promote
|
||||
|
||||
# external command options
|
||||
|
||||
#rsync_options=--archive --checksum --compress --progress --rsh="ssh -o \"StrictHostKeyChecking no\""
|
||||
#ssh_options=-o "StrictHostKeyChecking no"
|
||||
|
||||
# external command arguments. Values shown are examples.
|
||||
|
||||
#pg_ctl_options='-s'
|
||||
#pg_basebackup_options='--xlog-method=s'
|
||||
|
||||
|
||||
# Standby clone settings
|
||||
# ----------------------
|
||||
#
|
||||
# These settings apply when cloning a standby (`repmgr standby clone`).
|
||||
|
||||
# Tablespaces can be remapped from one file system location to another:
|
||||
#
|
||||
# tablespace_mapping=/path/to/original/tablespace=/path/to/new/tablespace
|
||||
|
||||
# You can specify a restore_command to be used in the recovery.conf that
|
||||
# will be placed in the cloned standby
|
||||
#
|
||||
# restore_command = cp /path/to/archived/wals/%f %p
|
||||
|
||||
# Failover settings (repmgrd)
|
||||
# ---------------------------
|
||||
#
|
||||
# These settings are only applied when repmgrd is running. Values shown
|
||||
# are defaults.
|
||||
|
||||
# monitoring interval in seconds; default is 2
|
||||
#monitor_interval_secs=2
|
||||
|
||||
# Number of seconds to wait for a response from the primary server before
|
||||
# deciding it has failed.
|
||||
|
||||
#master_response_timeout=60
|
||||
|
||||
# Number of attempts at what interval (in seconds) to try and
|
||||
# connect to a server to establish its status (e.g. master
|
||||
# during failover)
|
||||
#reconnect_attempts=6
|
||||
#reconnect_interval=10
|
||||
# How many time we try to reconnect to master before starting failover procedure
|
||||
reconnect_attempts=6
|
||||
reconnect_interval=10
|
||||
|
||||
# Autofailover options
|
||||
#failover=manual # one of 'automatic', 'manual' (default: manual)
|
||||
# defines the action to take in the event of upstream failure
|
||||
#
|
||||
# 'automatic': repmgrd will automatically attempt to promote the
|
||||
# node or follow the new upstream node
|
||||
# 'manual': repmgrd will take no action and the mode will require
|
||||
# manual attention to reattach it to replication
|
||||
failover=manual
|
||||
priority=-1
|
||||
promote_command='repmgr standby promote -f /path/to/repmgr.conf'
|
||||
follow_command='repmgr standby follow -f /path/to/repmgr.conf -W'
|
||||
|
||||
#priority=100 # indicate a preferred priorty for promoting nodes
|
||||
# a value of zero or less prevents the node being promoted to primary
|
||||
# (default: 100)
|
||||
# Log level: possible values are DEBUG, INFO, NOTICE, WARNING, ERR, ALERT, CRIT or EMERG
|
||||
# Default: NOTICE
|
||||
loglevel=NOTICE
|
||||
|
||||
#promote_command='repmgr standby promote -f /path/to/repmgr.conf'
|
||||
#follow_command='repmgr standby follow -f /path/to/repmgr.conf -W'
|
||||
# Logging facility: possible values are STDERR or - for Syslog integration - one of LOCAL0, LOCAL1, ..., LOCAL7, USER
|
||||
# Default: STDERR
|
||||
logfacility=STDERR
|
||||
|
||||
# change wait time for primary; before we bail out and exit when the primary
|
||||
# disappears, we wait 'reconnect_attempts' * 'retry_promote_interval_secs'
|
||||
# seconds; by default this would be half an hour, as 'retry_promote_interval_secs'
|
||||
# default value is 300)
|
||||
#retry_promote_interval_secs=300
|
||||
# path to pg_ctl executable
|
||||
pg_bindir=/usr/bin/
|
||||
|
||||
# Number of seconds after which the witness server resyncs the repl_nodes table
|
||||
#witness_repl_nodes_sync_interval_secs=15
|
||||
#
|
||||
# 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
|
||||
|
||||
185
repmgr.h
185
repmgr.h
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* repmgr.h
|
||||
* Copyright (c) 2ndQuadrant, 2010-2016
|
||||
* 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
|
||||
@@ -20,174 +20,55 @@
|
||||
#ifndef _REPMGR_H_
|
||||
#define _REPMGR_H_
|
||||
|
||||
#include <libpq-fe.h>
|
||||
#include <postgres_fe.h>
|
||||
#include <getopt_long.h>
|
||||
#include "pqexpbuffer.h"
|
||||
#include "postgres_fe.h"
|
||||
#include "getopt_long.h"
|
||||
#include "libpq-fe.h"
|
||||
|
||||
#include "strutil.h"
|
||||
#include "dbutils.h"
|
||||
#include "errcode.h"
|
||||
|
||||
#define PRIMARY_MODE 0
|
||||
#define STANDBY_MODE 1
|
||||
#define WITNESS_MODE 2
|
||||
|
||||
#include "config.h"
|
||||
#include "dirmod.h"
|
||||
#define MAXFILENAME 1024
|
||||
#define ERRBUFF_SIZE 512
|
||||
|
||||
#define MIN_SUPPORTED_VERSION "9.3"
|
||||
#define MIN_SUPPORTED_VERSION_NUM 90300
|
||||
|
||||
#define ERRBUFF_SIZE 512
|
||||
|
||||
#define DEFAULT_WAL_KEEP_SEGMENTS "0"
|
||||
#define DEFAULT_CONFIG_FILE "./repmgr.conf"
|
||||
#define DEFAULT_WAL_KEEP_SEGMENTS "5000"
|
||||
#define DEFAULT_DEST_DIR "."
|
||||
#define DEFAULT_MASTER_PORT "5432"
|
||||
#define DEFAULT_DBNAME "postgres"
|
||||
#define DEFAULT_REPMGR_SCHEMA_PREFIX "repmgr_"
|
||||
#define DEFAULT_PRIORITY 100
|
||||
#define FAILOVER_NODES_MAX_CHECK 50
|
||||
|
||||
#define MANUAL_FAILOVER 0
|
||||
#define AUTOMATIC_FAILOVER 1
|
||||
#define NODE_NOT_FOUND -1
|
||||
#define NO_UPSTREAM_NODE -1
|
||||
#define UNKNOWN_NODE_ID -1
|
||||
|
||||
/* command line options without short versions */
|
||||
#define OPT_HELP 1
|
||||
#define OPT_CHECK_UPSTREAM_CONFIG 2
|
||||
#define OPT_RECOVERY_MIN_APPLY_DELAY 3
|
||||
#define OPT_COPY_EXTERNAL_CONFIG_FILES 4
|
||||
#define OPT_CONFIG_ARCHIVE_DIR 5
|
||||
#define OPT_PG_REWIND 6
|
||||
#define OPT_PWPROMPT 7
|
||||
#define OPT_CSV 8
|
||||
#define OPT_NODE 9
|
||||
#define OPT_WITHOUT_BARMAN 10
|
||||
#define OPT_NO_UPSTREAM_CONNECTION 11
|
||||
#define OPT_REGISTER_WAIT 12
|
||||
#define OPT_CLUSTER 13
|
||||
|
||||
/* deprecated command line options */
|
||||
#define OPT_INITDB_NO_PWPROMPT 999
|
||||
#define OPT_IGNORE_EXTERNAL_CONFIG_FILES 998
|
||||
|
||||
#define CONFIG_FILE_SAMEPATH 1
|
||||
#define CONFIG_FILE_PGDATA 2
|
||||
|
||||
|
||||
/* Run time options type */
|
||||
typedef struct
|
||||
{
|
||||
char dbname[MAXLEN];
|
||||
char host[MAXLEN];
|
||||
char username[MAXLEN];
|
||||
char dest_dir[MAXPGPATH];
|
||||
char config_file[MAXPGPATH];
|
||||
char remote_user[MAXLEN];
|
||||
char superuser[MAXLEN];
|
||||
char wal_keep_segments[MAXLEN];
|
||||
bool verbose;
|
||||
bool terse;
|
||||
bool force;
|
||||
bool wait_for_master;
|
||||
bool ignore_rsync_warn;
|
||||
bool witness_pwprompt;
|
||||
bool rsync_only;
|
||||
bool fast_checkpoint;
|
||||
bool csv_mode;
|
||||
bool without_barman;
|
||||
bool no_upstream_connection;
|
||||
bool copy_external_config_files;
|
||||
int copy_external_config_files_destination;
|
||||
bool wait_register_sync;
|
||||
int wait_register_sync_seconds;
|
||||
char masterport[MAXLEN];
|
||||
/*
|
||||
* configuration file parameters which can be overridden on the
|
||||
* command line
|
||||
*/
|
||||
char loglevel[MAXLEN];
|
||||
|
||||
/* parameter used by STANDBY SWITCHOVER */
|
||||
char remote_config_file[MAXLEN];
|
||||
char pg_rewind[MAXPGPATH];
|
||||
char pg_ctl_mode[MAXLEN];
|
||||
/* parameter used by STANDBY {ARCHIVE_CONFIG | RESTORE_CONFIG} */
|
||||
char config_archive_dir[MAXLEN];
|
||||
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];
|
||||
|
||||
/* parameter used by CLUSTER CLEANUP */
|
||||
int keep_history;
|
||||
/* parameter used by {STANDBY|WITNESS} UNREGISTER */
|
||||
int node;
|
||||
|
||||
char pg_bindir[MAXLEN];
|
||||
|
||||
char recovery_min_apply_delay[MAXLEN];
|
||||
} t_runtime_options;
|
||||
|
||||
#define T_RUNTIME_OPTIONS_INITIALIZER { "", "", "", "", "", "", "", DEFAULT_WAL_KEEP_SEGMENTS, false, false, false, false, false, false, false, false, false, false, false, false, CONFIG_FILE_SAMEPATH, false, 0, "", "", "", "", "fast", "", 0, UNKNOWN_NODE_ID, "", ""}
|
||||
|
||||
struct BackupLabel
|
||||
{
|
||||
XLogRecPtr start_wal_location;
|
||||
char start_wal_file[MAXLEN];
|
||||
XLogRecPtr checkpoint_location;
|
||||
char backup_from[MAXLEN];
|
||||
char backup_method[MAXLEN];
|
||||
char start_time[MAXLEN];
|
||||
char label[MAXLEN];
|
||||
XLogRecPtr min_failover_slot_lsn;
|
||||
};
|
||||
|
||||
|
||||
typedef struct
|
||||
{
|
||||
char slot[MAXLEN];
|
||||
char xlog_method[MAXLEN];
|
||||
} t_basebackup_options;
|
||||
|
||||
#define T_BASEBACKUP_OPTIONS_INITIALIZER { "", "" }
|
||||
|
||||
typedef struct
|
||||
{
|
||||
int size;
|
||||
char **keywords;
|
||||
char **values;
|
||||
} t_conninfo_param_list;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
char filepath[MAXPGPATH];
|
||||
char filename[MAXPGPATH];
|
||||
bool in_data_directory;
|
||||
} t_configfile_info;
|
||||
|
||||
|
||||
typedef struct
|
||||
{
|
||||
int size;
|
||||
int entries;
|
||||
t_configfile_info **files;
|
||||
} t_configfile_list;
|
||||
|
||||
#define T_CONFIGFILE_LIST_INITIALIZER { 0, 0, NULL }
|
||||
|
||||
|
||||
typedef struct
|
||||
{
|
||||
int node_id;
|
||||
int node_status;
|
||||
} t_node_status_rec;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
int node_id;
|
||||
char node_name[MAXLEN];
|
||||
t_node_status_rec **node_status_list;
|
||||
} t_node_matrix_rec;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
int node_id;
|
||||
char node_name[MAXLEN];
|
||||
t_node_matrix_rec **matrix_list_rec;
|
||||
} t_node_status_cube;
|
||||
|
||||
int keep_history;
|
||||
} t_runtime_options;
|
||||
|
||||
#define T_RUNTIME_OPTIONS_INITIALIZER { "", "", "", "", "", "", DEFAULT_WAL_KEEP_SEGMENTS, false, false, false, false, "", "", 0 }
|
||||
|
||||
#endif
|
||||
|
||||
11
repmgr.sql
11
repmgr.sql
@@ -1,7 +1,7 @@
|
||||
/*
|
||||
* repmgr.sql
|
||||
*
|
||||
* Copyright (C) 2ndQuadrant, 2010-2016
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
*/
|
||||
|
||||
@@ -59,12 +59,3 @@ WHERE (standby_node, last_monitor_time) IN (SELECT standby_node, MAX(last_monito
|
||||
ALTER VIEW repl_status OWNER TO repmgr;
|
||||
|
||||
CREATE INDEX idx_repl_status_sort ON repl_monitor(last_monitor_time, standby_node);
|
||||
|
||||
/*
|
||||
* This view shows the list of nodes with the information of which one is the upstream
|
||||
* in each case (when appliable)
|
||||
*/
|
||||
CREATE VIEW repl_show_nodes AS
|
||||
SELECT rn.id, rn.conninfo, rn.type, rn.name, rn.cluster,
|
||||
rn.priority, rn.active, sq.name AS upstream_node_name
|
||||
FROM repl_nodes as rn LEFT JOIN repl_nodes AS sq ON sq.id=rn.upstream_node_id;
|
||||
|
||||
@@ -1,7 +1,6 @@
|
||||
#
|
||||
# Makefile
|
||||
#
|
||||
# Copyright (c) 2ndQuadrant, 2010-2016
|
||||
# Copyright (c) 2ndQuadrant, 2010
|
||||
#
|
||||
|
||||
MODULE_big = repmgr_funcs
|
||||
|
||||
@@ -1,85 +0,0 @@
|
||||
/*
|
||||
* Update a repmgr 2.x installation to repmgr 3.0
|
||||
* ----------------------------------------------
|
||||
*
|
||||
* 1. Stop any running repmgrd instances
|
||||
* 2. On the master node, execute the SQL statements listed below,
|
||||
* taking care to identify the master node and any inactive
|
||||
* nodes
|
||||
* 3. Restart repmgrd (being sure to use repmgr 3.0)
|
||||
*/
|
||||
|
||||
/*
|
||||
* Set the search path to the name of the schema used by
|
||||
* your repmgr installation
|
||||
* (this should be "repmgr_" + the cluster name defined in
|
||||
* 'repmgr.conf')
|
||||
*/
|
||||
|
||||
-- SET search_path TO 'name_of_repmgr_schema';
|
||||
|
||||
BEGIN;
|
||||
|
||||
ALTER TABLE repl_nodes RENAME TO repl_nodes2_0;
|
||||
|
||||
CREATE TABLE repl_nodes (
|
||||
id INTEGER PRIMARY KEY,
|
||||
type TEXT NOT NULL CHECK (type IN('master','standby','witness')),
|
||||
upstream_node_id INTEGER NULL REFERENCES repl_nodes (id),
|
||||
cluster TEXT NOT NULL,
|
||||
name TEXT NOT NULL,
|
||||
conninfo TEXT NOT NULL,
|
||||
slot_name TEXT NULL,
|
||||
priority INTEGER NOT NULL,
|
||||
active BOOLEAN NOT NULL DEFAULT TRUE
|
||||
);
|
||||
|
||||
INSERT INTO repl_nodes
|
||||
(id, type, cluster, name, conninfo, priority)
|
||||
SELECT id,
|
||||
CASE
|
||||
WHEN witness IS TRUE THEN 'witness'
|
||||
ELSE 'standby'
|
||||
END AS type,
|
||||
cluster,
|
||||
name,
|
||||
conninfo,
|
||||
priority + 100
|
||||
FROM repl_nodes2_0;
|
||||
|
||||
/*
|
||||
* You'll need to set the master explicitly; the following query
|
||||
* should identify the master node ID but will only work if all
|
||||
* standby servers are connected:
|
||||
*
|
||||
* SELECT id FROM repmgr_test.repl_nodes WHERE name NOT IN (SELECT application_name FROM pg_stat_replication)
|
||||
*
|
||||
* If in doubt, execute 'repmgr cluster show' will definitively identify
|
||||
* the master.
|
||||
*/
|
||||
UPDATE repl_nodes SET type = 'master' WHERE id = $master_id;
|
||||
|
||||
/* If any nodes are known to be inactive, update them here */
|
||||
|
||||
-- UPDATE repl_nodes SET active = FALSE WHERE id IN (...);
|
||||
|
||||
/* There's also an event table which we need to create */
|
||||
CREATE TABLE repl_events (
|
||||
node_id INTEGER NOT NULL,
|
||||
event TEXT NOT NULL,
|
||||
successful BOOLEAN NOT NULL DEFAULT TRUE,
|
||||
event_timestamp TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
|
||||
details TEXT NULL
|
||||
);
|
||||
|
||||
/* When you're sure of your changes, commit them */
|
||||
|
||||
-- COMMIT;
|
||||
|
||||
|
||||
/*
|
||||
* execute the following command when you are sure you no longer
|
||||
* require the old table:
|
||||
*/
|
||||
|
||||
-- DROP TABLE repl_nodes2_0;
|
||||
@@ -1,35 +0,0 @@
|
||||
/*
|
||||
* Update a repmgr 3.0 installation to repmgr 3.1
|
||||
* ----------------------------------------------
|
||||
*
|
||||
* The new repmgr package should be installed first. Then
|
||||
* carry out these steps:
|
||||
*
|
||||
* 1. (If repmgrd is used) stop any running repmgrd instances
|
||||
* 2. On the master node, execute the SQL statements listed below
|
||||
* 3. (If repmgrd is used) restart repmgrd
|
||||
*/
|
||||
|
||||
/*
|
||||
* If your repmgr installation is not included in your repmgr
|
||||
* user's search path, please set the search path to the name
|
||||
* of the repmgr schema to ensure objects are installed in
|
||||
* the correct location.
|
||||
*
|
||||
* The repmgr schema is "repmgr_" + the cluster name defined in
|
||||
* 'repmgr.conf'.
|
||||
*/
|
||||
|
||||
-- SET search_path TO 'name_of_repmgr_schema';
|
||||
|
||||
BEGIN;
|
||||
|
||||
-- New view "repl_show_nodes" which also displays the server's
|
||||
-- upstream node
|
||||
|
||||
CREATE VIEW repl_show_nodes AS
|
||||
SELECT rn.id, rn.conninfo, rn.type, rn.name, rn.cluster,
|
||||
rn.priority, rn.active, sq.name AS upstream_node_name
|
||||
FROM repl_nodes as rn LEFT JOIN repl_nodes AS sq ON sq.id=rn.upstream_node_id;
|
||||
|
||||
COMMIT;
|
||||
@@ -1,32 +0,0 @@
|
||||
/*
|
||||
* Update a repmgr 3.1.1 installation to repmgr 3.1.2
|
||||
* --------------------------------------------------
|
||||
*
|
||||
* This update is only required if repmgrd is being used in conjunction
|
||||
* with a witness server.
|
||||
*
|
||||
* The new repmgr package should be installed first. Then
|
||||
* carry out these steps:
|
||||
*
|
||||
* 1. (If repmgrd is used) stop any running repmgrd instances
|
||||
* 2. On the master node, execute the SQL statement listed below
|
||||
* 3. (If repmgrd is used) restart repmgrd
|
||||
*/
|
||||
|
||||
/*
|
||||
* If your repmgr installation is not included in your repmgr
|
||||
* user's search path, please set the search path to the name
|
||||
* of the repmgr schema to ensure objects are installed in
|
||||
* the correct location.
|
||||
*
|
||||
* The repmgr schema is "repmgr_" + the cluster name defined in
|
||||
* 'repmgr.conf'.
|
||||
*/
|
||||
|
||||
-- SET search_path TO 'name_of_repmgr_schema';
|
||||
|
||||
BEGIN;
|
||||
|
||||
ALTER TABLE repl_nodes DROP CONSTRAINT repl_nodes_upstream_node_id_fkey,
|
||||
ADD CONSTRAINT repl_nodes_upstream_node_id_fkey FOREIGN KEY (upstream_node_id) REFERENCES repl_nodes(id) DEFERRABLE;
|
||||
COMMIT;
|
||||
@@ -9,7 +9,6 @@
|
||||
#include "fmgr.h"
|
||||
#include "access/xlog.h"
|
||||
#include "miscadmin.h"
|
||||
#include "replication/walreceiver.h"
|
||||
#include "storage/ipc.h"
|
||||
#include "storage/lwlock.h"
|
||||
#include "storage/procarray.h"
|
||||
@@ -19,7 +18,7 @@
|
||||
#include "utils/timestamp.h"
|
||||
|
||||
/* same definition as the one in xlog_internal.h */
|
||||
#define MAXFNAMELEN 64
|
||||
#define MAXFNAMELEN 64
|
||||
|
||||
PG_MODULE_MAGIC;
|
||||
|
||||
@@ -28,38 +27,37 @@ 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);
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* Module load callback
|
||||
*/
|
||||
@@ -70,9 +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;
|
||||
@@ -83,12 +81,7 @@ _PG_init(void)
|
||||
* resources in repmgr_shmem_startup().
|
||||
*/
|
||||
RequestAddinShmemSpace(repmgr_memsize());
|
||||
|
||||
#if (PG_VERSION_NUM >= 90600)
|
||||
RequestNamedLWLockTranche("repmgr", 1);
|
||||
#else
|
||||
RequestAddinLWLocks(1);
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Install hooks.
|
||||
@@ -127,19 +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 ... */
|
||||
#if (PG_VERSION_NUM >= 90600)
|
||||
shared_state->lock = &(GetNamedLWLockTranche("repmgr"))->lock;
|
||||
#else
|
||||
shared_state->lock = LWLockAssign();
|
||||
#endif
|
||||
snprintf(shared_state->location,
|
||||
sizeof(shared_state->location), "%X/%X", 0, 0);
|
||||
sizeof(shared_state->location), "%X/%X", 0, 0);
|
||||
}
|
||||
|
||||
LWLockRelease(AddinShmemInitLock);
|
||||
@@ -152,20 +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;
|
||||
}
|
||||
@@ -177,7 +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)
|
||||
@@ -195,14 +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));
|
||||
}
|
||||
@@ -231,9 +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;
|
||||
@@ -241,5 +230,3 @@ repmgr_get_last_updated(PG_FUNCTION_ARGS)
|
||||
|
||||
PG_RETURN_TIMESTAMPTZ(last_updated);
|
||||
}
|
||||
|
||||
|
||||
|
||||
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* repmgr_function.sql
|
||||
* Copyright (c) 2ndQuadrant, 2010-2016
|
||||
* Copyright (c) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* uninstall_repmgr_funcs.sql
|
||||
* Copyright (c) 2ndQuadrant, 2010-2016
|
||||
* Copyright (c) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
64
strutil.c
64
strutil.c
@@ -1,7 +1,7 @@
|
||||
/*
|
||||
* strutil.c
|
||||
*
|
||||
* Copyright (C) 2ndQuadrant, 2010-2016
|
||||
* 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
|
||||
@@ -25,21 +25,29 @@
|
||||
#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)));
|
||||
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)
|
||||
{
|
||||
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);
|
||||
}
|
||||
|
||||
@@ -48,10 +56,10 @@ 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);
|
||||
@@ -62,7 +70,7 @@ 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;
|
||||
@@ -75,8 +83,7 @@ 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;
|
||||
@@ -87,34 +94,3 @@ maxlen_snprintf(char *str, const char *format,...)
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Adapted from: src/fe_utils/string_utils.c
|
||||
*
|
||||
* Function not publicly available before PostgreSQL 9.6.
|
||||
*/
|
||||
void
|
||||
appendShellString(PQExpBuffer buf, const char *str)
|
||||
{
|
||||
const char *p;
|
||||
|
||||
appendPQExpBufferChar(buf, '\'');
|
||||
for (p = str; *p; p++)
|
||||
{
|
||||
if (*p == '\n' || *p == '\r')
|
||||
{
|
||||
fprintf(stderr,
|
||||
_("shell command argument contains a newline or carriage return: \"%s\"\n"),
|
||||
str);
|
||||
exit(ERR_BAD_CONFIG);
|
||||
}
|
||||
|
||||
if (*p == '\'')
|
||||
appendPQExpBufferStr(buf, "'\"'\"'");
|
||||
else
|
||||
appendPQExpBufferChar(buf, *p);
|
||||
}
|
||||
|
||||
appendPQExpBufferChar(buf, '\'');
|
||||
}
|
||||
|
||||
31
strutil.h
31
strutil.h
@@ -1,6 +1,6 @@
|
||||
/*
|
||||
* strutil.h
|
||||
* Copyright (C) 2ndQuadrant, 2010-2016
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify
|
||||
@@ -22,9 +22,7 @@
|
||||
#define _STRUTIL_H_
|
||||
|
||||
#include <stdlib.h>
|
||||
#include "pqexpbuffer.h"
|
||||
#include "errcode.h"
|
||||
|
||||
#include <errcode.h>
|
||||
|
||||
#define QUERY_STR_LEN 8192
|
||||
#define MAXLEN 1024
|
||||
@@ -32,23 +30,14 @@
|
||||
#define MAXVERSIONSTR 16
|
||||
#define MAXCONNINFO 1024
|
||||
|
||||
/* Why? http://stackoverflow.com/a/5459929/398670 */
|
||||
#define STR(x) CppAsString(x)
|
||||
|
||||
#define MAXLEN_STR STR(MAXLEN)
|
||||
extern int xsnprintf(char *str, size_t size, const char *format, ...) __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)));
|
||||
|
||||
extern int
|
||||
maxlen_snprintf(char *str, const char *format,...)
|
||||
__attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 3)));
|
||||
|
||||
extern void
|
||||
appendShellString(PQExpBuffer buf, const char *str);
|
||||
#endif /* _STRUTIL_H_ */
|
||||
#endif /* _STRUTIL_H_ */
|
||||
|
||||
@@ -1,7 +1,7 @@
|
||||
/*
|
||||
* uninstall_repmgr.sql
|
||||
*
|
||||
* Copyright (C) 2ndQuadrant, 2010-2016
|
||||
* Copyright (C) 2ndQuadrant, 2010-2014
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
Reference in New Issue
Block a user