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94 Commits
v3.0 ... v3.0.2

Author SHA1 Message Date
Ian Barwick
2615cffecc v3.0.2
Not yet tagged, pending a couple of tests
2015-10-02 11:46:13 +09:00
Ian Barwick
1f838f99c2 Update TODO 2015-10-02 11:46:13 +09:00
Ian Barwick
d3f119005b Update version string to 3.0.1 2015-10-02 11:45:57 +09:00
Ian Barwick
db6d4d8820 Update version string 2015-10-02 11:45:57 +09:00
Ian Barwick
7a8a50e229 Add CONTRIBUTING.md 2015-10-02 10:18:06 +09:00
Ian Barwick
e188044593 Clean up markup 2015-10-02 10:07:36 +09:00
Ian Barwick
636f4b03c6 Spelling and markup fixes 2015-10-02 09:55:34 +09:00
Ian Barwick
bf96b383a3 Merge branch 'eternaltyro-master' 2015-10-02 09:49:55 +09:00
Ian Barwick
3a2e40f381 Merge branch 'master' of https://github.com/eternaltyro/repmgr into eternaltyro-master 2015-10-02 09:49:39 +09:00
Minh Danh
c608bb28ee Fix some typos 2015-10-02 08:03:55 +09:00
Ian Barwick
ca9c2e1143 Fix -D/--data-dir's long option
This was erroneously rendered as --dest-dir. This bugfeature seems
to have been around for a long time; however as the only way anyone
could know of the existence of --dest-dir is by reading the source
code, we can safely remove it.

Pointed out by Github user Jehan-Guillaume (ioguix) de Rorthais.
2015-10-02 07:50:19 +09:00
Ian Barwick
3a6d6b8899 Fix typo in README.md
Reported by Github user knopwob.
2015-10-02 07:17:39 +09:00
Ian Barwick
4091cb7f18 Update TODO 2015-10-01 16:09:37 +09:00
Ian Barwick
870b0a53b6 Allow 'primary' as synonym for 'master'.
"Primary" is the term preferred in the PostgreSQL documentation, so
we should at least support it.

Practically this means it's possible to write "rempgr primary register"
in place of "repmgr master register".

The next feature-release should replace "master" with "primary" in
the documentation and log messages.

Per gripe in Github #112.
2015-10-01 16:01:12 +09:00
Ian Barwick
6184cc57be Bump version in HEAD 2015-10-01 13:37:23 +09:00
Ian Barwick
e1254b6773 Update HISTORY 2015-10-01 13:24:02 +09:00
Ian Barwick
1c9121c2d8 Witness server - extract explicit port setting from conninfo setting
This makes the '-l/--local-port' option redundant, which is now
marked as deprecated.
2015-10-01 09:42:44 +09:00
Ian Barwick
6da03a6157 Free connection options array after use. 2015-10-01 09:16:36 +09:00
Ian Barwick
9bb6befa25 Sanity check 'conninfo' parameter
Catch errors early, it makes everyone's life easier.
2015-10-01 09:06:27 +09:00
Ian Barwick
a8e5c68d03 Better document '-l/--local-port' option.
Per Github #59.
2015-10-01 08:40:27 +09:00
Ian Barwick
b83e18c503 Fix '-l, --local-port' help output.
Is for witness server only.

Use constants for default port definitions while we're at it.

Github #123.
2015-10-01 08:24:14 +09:00
Ian Barwick
d4b845d213 'repmgr witness create --force': overwrite any existing node record
Consistent with 'repmgr standby register --force'.

Fixes Github #122.
2015-10-01 08:02:06 +09:00
Ian Barwick
75aad9a85e repmgr witness create --force: overwrite existing data directory
Per Github #82 (dimitri).
2015-09-30 17:05:54 +09:00
Ian Barwick
e115825cd6 Fix comment capitalization 2015-09-30 14:58:43 +09:00
Ian Barwick
6cf5ab2e53 Update HISTORY 2015-09-30 12:48:10 +09:00
Ian Barwick
f8119d20ea Handle tablespace mapping in 9.5 and later in --rsync-only mode
9.5 introduces the tablespace_map file, which is created on the upstream
node while a backup is running. We need to overwrite this with the
provided values.

Note that we only write explicitly-provided values to the tablespace_map
file, however the existing symlinks for non-specified tablespaces
will have been copied anyway.

Fixes Github #119.
2015-09-30 11:48:09 +09:00
Ian Barwick
0caddf2d2c Fix check when tablespace mapping option used with 9.3
As pointed out by EvilElk (Github issue #91).
2015-09-29 14:30:37 +09:00
Ian Barwick
a4abbc6f0c Minor formatting fixes 2015-09-29 14:18:48 +09:00
Ian Barwick
d7e489ea0a Update repmgr --help output
(per Github report #113 from renard)
2015-09-25 11:26:12 +09:00
Ian Barwick
2bcacff3b3 Update TODO 2015-09-25 11:19:21 +09:00
Ian Barwick
45eb0ea5d3 Miscelleanous comment fixes 2015-09-25 11:17:26 +09:00
Ian Barwick
c3bd02b83d Standardize if-statement formatting
"if(" -> "if ("
2015-09-24 17:45:08 +09:00
Ian Barwick
8e7d110a22 Check for existing master record before deleting it
Otherwise repmgr implies it's deleting a record which isn't actually
there.
2015-09-24 17:39:39 +09:00
Ian Barwick
43874d5576 Close database connection as soon as it is no longer required 2015-09-24 16:55:59 +09:00
Ian Barwick
87ff9d09ba Ensure --force option works with "master register"
This was failing previously if repmgr was able to connect to the
master database
2015-09-24 16:55:59 +09:00
Ian Barwick
c429b0b186 Don't fail with error when registering master if schema already defined
Registering a master creates the schema, but it may be desirable
to forcibly reregister a master without deleting the schema, so
uncouple the dependency.

Also ensure schema creation is atomic by wrapping it in a transaction.

Per GitHub issue #49.
2015-09-24 16:55:43 +09:00
Martín Marqués
03b88178c1 Minor change in an error log message 2015-09-23 10:44:07 -03:00
Martín Marqués
5f33f4286f Merge pull request #115 from xocolatl/unregister
Add a STANDBY UNREGISTER command.
2015-09-23 10:17:22 -03:00
Vik Fearing
932f84910b Add a STANDBY UNREGISTER command.
In some cases it is desirable to remove repmgr's handling of a standby, perhaps
because that standby is to be removed altogether.  With no UNREGISTER command,
one had to manually delete the corresponding row from repl_nodes.
2015-09-23 12:37:42 +02:00
Ian Barwick
1ef7f1368d Update TODO 2015-09-23 14:05:09 +09:00
Ian Barwick
640abed18f Don't close connection to master until upstream node updated 2015-09-23 13:11:51 +09:00
Tomas Vondra
ef6b24551a call update_node_record_set_upstream() for STANDBY FOLLOW
repmgrd correctly updates ID of the upstream node after automatic
failover, but repmgr was not doing that for manual failvers.

This moves the existing function to dbutils and modifies it so that
it does not rely on global variables with configuration (available
just in repmgrd).

This should fix issue #67 (hopefully, haven't done much testing).
2015-09-23 12:32:47 +09:00
Ian Barwick
42847e44d2 Update HISTORY file 2015-09-23 10:29:40 +09:00
Ian Barwick
dd7cfce3d3 Add TODO note about default configuration file.
Per suggestion in #108.
2015-09-22 19:26:19 +09:00
Ian Barwick
30fd111cba Rework config file handling
If no configuration file provided, also check default Postgres
sysconfig dir.

It would also be useful to check the configuration directory
provided by the RPM/DEB packages, not sure if that's programmatically
feasible.
2015-09-21 15:55:29 +09:00
Ian Barwick
65e63b062e Generally tidy up help output 2015-09-21 11:49:06 +09:00
Ian Barwick
053f672caa Treat -?/--help and -V/--version as normal options
Currently repmgr/repmgrd will only accept these as valid when
provided as the first command line option, however it's possible
a user will want to get the output of those options by adding
them to the end of a previously inputted command.

Note that after the first of these options is encountered, the
program will terminate and not process any other options. This
is consistent with psql's behaviour

Per GitHub issue #107 from Sébastien Gross.
2015-09-21 09:53:51 +09:00
Ian Barwick
f6d02b85d8 Better handling of situation where logfile can't be opened
If freopen() fails, stderr is diverted to an undisclosed location
and it's not clear what is going on.

Also add an explicit notice announcing our intention to divert
logging output to a file.

Per #105.

Note that it might make sense to disable logfile output when
running the repmgr command line client as normally you'd expect
immediate feedback.
2015-09-15 13:37:40 +09:00
Ian Barwick
6ebf3a7319 Make example output host match input configuration 2015-09-14 14:32:34 +09:00
Ian Barwick
7345ddcf00 Whitespace tweak 2015-09-10 14:27:21 +09:00
Ian Barwick
eb0af7ca23 Always pass -D/--pgdata option to pg_basebackup
repmgr does not require explicit provision of the target data
directory when cloning a standby (it defaults to the same directory
as on the master). However this is a required option for pg_basebackup
which was only being provided if repmgr's -D/--data-dir option was
set, so ensure we always provide whatever repmgr is using.

Per report from Martín.
2015-08-25 14:36:51 +09:00
Ian Barwick
ae47e5f413 Fix example command syntax 2015-08-12 12:32:41 +09:00
Ian Barwick
46100a9549 "Supports 9.3 and 9.4" -> "Supports 9.3 and later"
In case anyone thinks it might not run on 9.5.
2015-08-12 12:26:27 +09:00
Gianni Ciolli
9bd95cabdf Merge pull request #98 from gciolli/master
Bug #97 fix (standby clone --force does not empty pg_xlog).
2015-08-11 15:10:37 +02:00
Gianni Ciolli
f1584469bf Bug #97 fix (standby clone --force does not empty pg_xlog). 2015-08-11 14:59:23 +02:00
Abhijit Menon-Sen
a7f46d24de Merge pull request #96 from gciolli/master
Bug #90 fix (autofailover with reconnect_attemps > 1).
2015-08-11 06:35:31 +05:30
Gianni Ciolli
462d446477 Bug #90 fix (autofailover with reconnect_attemps > 1).
The main change is that now check_connection requires a conninfo
parameter, and the connection object has type (PGconn **) so it can be
replaced by check_connection if needed.

The bug was caused by the fact that the first failure resulted in
*conn == NULL, so that subsequent checks of the upstream connection
were failing irrespectively of the actual state of the upstream node.

Now, when *conn == NULL, check_connection will use conninfo to
establish a new connection and place it into *conn. We introduce a new
INTERNAL_ERROR code for the case when they are both NULL.

In passing, we also reworded a confusing error message, distinguishing
a timeout from the actual elapsed time.
2015-08-10 20:58:43 +02:00
Ian Barwick
23a72f489c Add note about configuring 'shared_preload_libraries' for repmgr
Useful to put all the possible postgresql.conf changes in one place.
2015-08-07 14:37:57 +09:00
Christoph Monech-Tegeder
f3f56b0cd6 fix repmgrd spelling in default config files
make sure the daemon has it's trailing _d_ everywhere
2015-08-06 17:20:56 +02:00
Abhijit Menon-Sen
00146b7fbd Merge pull request #88 from soxwellfb/fix-config-reader
Ignore comments after values
2015-08-04 13:28:04 +05:30
Simon Oxwell
faf72a2514 Ignore comments after values 2015-07-15 14:53:35 +10:00
Ian Barwick
7010b636e0 Reword error message for consistency
Github issue #87
2015-07-10 10:11:23 +09:00
Gregory Duchatelet
00deff9069 [Fix] if 'node' config parameter is set as a string, nothing complain and all nodes are set to id '0'. 2015-07-06 11:20:31 +02:00
Ian Barwick
5240a5723a Clarify WAL file retention issue during standby cloning.
Per GitHub issue #86.
2015-07-02 09:32:30 +09:00
Martín Marqués
45e29c5b28 Typo in a comment 2015-06-04 18:12:35 +09:00
Ian Barwick
5def293ed6 Configuration file: ignore whitespace following the '=' sign 2015-06-04 11:58:34 +09:00
Ian Barwick
ff7b4d3f02 Improve whitespace handling
Ignore blank lines which consist of whitespace. Per issue #71 in
GitHub.

This fix also improves comment handling and will treat lines with
whitespace before the '#' character as whitespace.
2015-06-04 11:44:38 +09:00
Ian Barwick
a54478a045 Documentation tweaks 2015-05-12 10:16:52 +09:00
Marco Nenciarini
7ad9a2c28a Allow repmgr to be compiled with a libpq newer than PostgreSQL
Fixes #44
2015-04-29 18:00:54 +02:00
John Galt
3deb6784e7 Fixed typo 2015-04-16 13:30:40 +09:00
Ian Barwick
ba275bb0c2 Update HISTORY file 2015-04-16 11:02:40 +09:00
Ian Barwick
9735bb63a1 Add short option '-c' for '--fast-checkpoint'
This is similar to pg_basebackup's '-c/--checkpoint=fast|spread'
option.
2015-04-16 08:15:44 +09:00
Ian Barwick
1e5792f8df Remove unused function 2015-04-14 14:29:47 +09:00
Ian Barwick
a01fefa7d0 After standby promotion, ensure metadata is updated by repmgr
Previously this was handled by repmgrd but if a standby is promoted
directly this will leave the metadata in an incorrect state.
2015-04-14 13:39:48 +09:00
Ian Barwick
34eaf94b2b Fix variable name spelling 2015-04-14 13:15:44 +09:00
Ian Barwick
68e3a9d7ab Improve promotion failure handling
Exit with error; don't attempt to write event log as master
connection will not be valid at this point.
2015-04-14 13:09:02 +09:00
Ian Barwick
2ad4f68700 Add notes about cluster name and quoting
Supported, but better to avoid.
2015-04-13 15:40:29 +09:00
Ian Barwick
00aa0c8c87 Fix typos 2015-04-13 15:22:09 +09:00
Ian Barwick
e8025c7c9f Re-use replication slot if it already exists
Per issue #65 in GitHub
2015-04-13 13:17:38 +09:00
Ian Barwick
6a17360b4c Add FAQ item about shared_preload_libraries = 'repmgr_funcs' 2015-04-10 16:45:04 +09:00
Ian Barwick
9e5e843a4f Prevent a test SSH connection being made when not needed
When using the default pg_basebackup method to clone a standby
together with the `--ignore-external-config-files` option, there's
no need to test for a working SSH connection - which may not
be desirable in many use-cases anyway.

Per issue #64 in GitHub.
2015-04-10 15:05:19 +09:00
Martín Marqués
734ae1825e Don't run ssh connection test when --ignore-external-config-files was used 2015-04-10 11:02:19 +09:00
Ian Barwick
41fe58764e Add note about PGPASSFILE 2015-04-10 10:29:52 +09:00
Ian Barwick
58a5249b7e HISTORY update 2015-04-09 16:12:11 +09:00
Ian Barwick
90c0bd4638 Add FAQ item about witness server port 2015-04-09 16:05:44 +09:00
Martín Marqués
359e81a6d6 Updated RHEL files. 2015-04-02 05:54:08 -03:00
Yogesh Girikumar
0037e66034 fix messy formatting 2015-03-31 22:58:50 +05:30
Ian Barwick
07d220cb00 Correct monitoring table column names
It would be more consistent to change the "primary" to "master"
but that would make the table incompatible with the v2.0 table.
2015-03-31 18:14:32 +09:00
Ian Barwick
4dfeffe087 Add constant NODE_NOT_FOUND
Which is what the magic number means in those contexts.
2015-03-31 14:35:16 +09:00
Ian Barwick
18544c82ca Prevent rempgrd from looping infinitely if node was not registered 2015-03-31 14:25:08 +09:00
Ian Barwick
0f86bdcd05 Fixes for event logging
We can't always assume a valid connection to the master
2015-03-31 14:15:29 +09:00
Ian Barwick
7d33c1e411 Only attempt to log an event if the rempgr schema has been set
In some circumstances (primarily when executing `repmgr standby
clone`) the `repmgr.conf` file is not mandated. However this means
the repmgr schema is not known, and any attempt to create an
event record will result in a log warning, which may cause
confusion as to the success of the operation.

It might be better to mandate providing `repmgr.conf` in all
circumstances.

Per report in https://github.com/2ndQuadrant/repmgr/issues/53 .
2015-03-31 10:28:34 +09:00
Ian Barwick
fec65bde3d Fix typo in -?/--help output 2015-03-27 18:09:41 +09:00
Ian Barwick
4863ea98bc Bump specfile version number 2015-03-27 17:42:55 +09:00
26 changed files with 1541 additions and 861 deletions

29
CONTRIBUTING.md Normal file
View File

@@ -0,0 +1,29 @@
License and Contributions
=========================
`repmgr` is licensed under the GPL v3. All of its code and documentation is
Copyright 2010-2015, 2ndQuadrant Limited. See the files COPYRIGHT and LICENSE for
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.

View File

@@ -203,6 +203,12 @@ repmgr will also ask for the superuser password on the witness database so
it can reconnect when needed (the command line option --initdb-no-pwprompt
will set up a password-less superuser).
By default the witness server will listen on port 5499; this value can be
overridden by explicitly providing the port number in the conninfo string
in repmgr.conf. (Note that it is also possible to specify the port number
with the -l/--local-port option, however this option is now deprecated and
will be overridden by a port setting in the conninfo string).
Start the repmgrd daemons
-------------------------

19
FAQ.md
View File

@@ -90,6 +90,23 @@ General
This option is only available when using the `--rsync-only` option.
- How can I make the witness server use a particular port?
By default the witness server is configured to use port 5499; this
is intended to support running the witness server as a separate
instance on a normal node server, rather than on its own dedicated server.
To specify a port for the witness server, supply the port number to
repmgr with the `-l/--local-port` command line 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.
`repmgrd`
---------
@@ -102,7 +119,7 @@ General
- How can I prevent a node from ever being promoted to master?
In `rempgr.conf`, set its priority to a value of 0 or less.
In `repmgr.conf`, set its priority to a value of 0 or less.
- Does `repmgrd` support delayed standbys?

30
HISTORY
View File

@@ -1,4 +1,27 @@
3.0
3.0.2 2015-09-
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 UNREGISTE (Vik Fearing)
3.0.1 2015-04-16
Prevent repmgrd from looping infinitely if node was not registered (Ian)
When promoting a standby, have repmgr (not repmgrd) handle metadata updates (Ian)
Re-use replication slot if it already exists (Ian)
Prevent a test SSH connection being made when not needed (Ian)
Correct monitoring table column names (Ian)
3.0 2015-03-27
Require PostgreSQL 9.3 or later (Ian)
Use `pg_basebackup` by default (instead of `rsync`) to clone standby servers (Ian)
Use `pg_ctl promote` to promote a standby to primary
@@ -11,6 +34,11 @@
General usability and logging message improvements (Ian)
Code consolidation and cleanup (Ian)
2.0.3 2015-04-16
Add -S/--superuser option for witness database creation Ian)
Add -c/--fast-checkpoint option for cloning (Christoph)
Add option "--initdb-no-pwprompt" (Ian)
2.0.2 2015-02-17
Add "--checksum" in rsync when using "--force" (Jaime)
Use createdb/createuser instead of psql (Jaime)

View File

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

View File

@@ -21,7 +21,8 @@ Master setup
CREATE DATABASE repmgr_db OWNER repmgr_usr;
```
- configure `postgresql.conf` for replication (see above)
- configure `postgresql.conf` for replication (see README.md for sample
settings)
- update `pg_hba.conf`, e.g.:
@@ -71,7 +72,10 @@ Standby setup
[2015-03-03 18:18:23] [NOTICE] HINT: You can now start your postgresql server
[2015-03-03 18:18:23] [NOTICE] for example : pg_ctl -D /path/to/standby/data start
Note that at this point it does not matter if the `repmgr.conf` file is not found.
Note that the `repmgr.conf` file is not required when cloning a standby.
However we recommend providing a valid `repmgr.conf` if you wish to use
replication slots, or want `repmgr` to log the clone event to the
`repl_events` table.
This will clone the PostgreSQL database files from the master, including its
`postgresql.conf` and `pg_hba.conf` files, and additionally automatically create
@@ -107,8 +111,8 @@ This concludes the basic `repmgr` setup of master and standby. The records
created in the `repl_nodes` table should look something like this:
repmgr_db=# SELECT * from repmgr_test.repl_nodes;
id | type | upstream_node_id | cluster | name | conninfo | slot_name | priority | active
----+---------+------------------+---------+-------+-------------------------------------------------+-----------+----------+--------
1 | primary | | test | node1 | host=localhost user=repmgr_usr dbname=repmgr_db | | 0 | t
2 | standby | 1 | test | node2 | host=localhost user=repmgr_usr dbname=repmgr_db | | 0 | t
id | type | upstream_node_id | cluster | name | conninfo | slot_name | priority | active
----+---------+------------------+---------+-------+----------------------------------------------------+-----------+----------+--------
1 | primary | | test | node1 | host=repmgr_node1 user=repmgr_usr dbname=repmgr_db | | 0 | t
2 | standby | 1 | test | node2 | host=repmgr_node2 user=repmgr_usr dbname=repmgr_db | | 0 | t
(2 rows)

View File

@@ -7,7 +7,7 @@ hot-standby capabilities with tools to set up standby servers, monitor
replication, and perform administrative tasks such as failover or manual
switchover operations.
This document covers `repmgr 3`, which supports PostgreSQL 9.4 and 9.3.
This document covers `repmgr 3`, which supports PostgreSQL 9.3 and later.
This version can use `pg_basebackup` to clone standby servers, supports
replication slots and cascading replication, doesn't require a restart
after promotion, and has many usability improvements.
@@ -53,7 +53,7 @@ on any UNIX-like system which PostgreSQL itself supports.
All nodes must be running the same major version of PostgreSQL, and we
recommend that they also run the same minor version. This version of
`repmgr` (v3) supports PostgreSQL 9.3 and 9.4.
`repmgr` (v3) supports PostgreSQL 9.3 and later.
Earlier versions of `repmgr` needed password-less SSH access between
nodes in order to clone standby servers using `rsync`. `repmgr 3` can
@@ -98,8 +98,8 @@ for details.
### PostgreSQL configuration
The primary server needs to be configured for replication with the
following settings in `postgresql.conf`:
The primary server needs to be configured for replication with settings
like the following in `postgresql.conf`:
# Allow read-only queries on standby servers. The number of WAL
# senders should be larger than the number of standby servers.
@@ -121,13 +121,18 @@ following settings in `postgresql.conf`:
archive_mode = on
archive_command = 'cd .'
# You can also set additional replication parameters here, such as
# hot_standby_feedback or synchronous_standby_names.
# If you plan to use repmgrd, ensure that shared_preload_libraries
# is configured to load 'repmgr_funcs'
shared_preload_libraries = 'repmgr_funcs'
PostgreSQL 9.4 makes it possible to use replication slots, which means
the value of wal_keep_segments need no longer be set. With 9.3, `repmgr`
expects it to be set to at least 5000 (= 80GB of WAL) by default, though
this can be overriden with the `-w N` argument.
the value of `wal_keep_segments` need no longer be set. See section
"Replication slots" below for more details.
With PostgreSQL 9.3, `repmgr` expects `wal_keep_segments` to be set to
at least 5000 (= 80GB of WAL) by default, though this can be overriden
with the `-w N` argument.
A dedicated PostgreSQL superuser account and a database in which to
store monitoring and replication data are required. Create them by
@@ -223,7 +228,7 @@ The node can then be restarted.
The node will then need to be re-registered with `repmgr`; again
the `--force` option is required to update the existing record:
repmgr -f /etc/repmgr/repmgr.conf
repmgr -f /etc/repmgr/repmgr.conf \
--force \
standby register
@@ -345,6 +350,7 @@ Following event types currently exist:
master_register
standby_register
standby_unregister
standby_clone
standby_promote
witness_create
@@ -398,6 +404,18 @@ stored in the `repl_nodes` table.
Note that `repmgr` will fail with an error if this option is specified when
working with PostgreSQL 9.3.
Be aware that when initially cloning a standby, you will need to ensure
that all required WAL files remain available while the cloning is taking
place. If using the default `pg_basebackup` method, we recommend setting
`pg_basebackup`'s `--xlog-method` parameter to `stream` like this:
pg_basebackup_options='--xlog-method=stream'
See the `pg_basebackup` documentation [*] for details. Otherwise you'll need
to set `wal_keep_segments` to an appropriately high value.
[*] http://www.postgresql.org/docs/current/static/app-pgbasebackup.html
Further reading:
* http://www.postgresql.org/docs/current/interactive/warm-standby.html#STREAMING-REPLICATION-SLOTS
* http://blog.2ndquadrant.com/postgresql-9-4-slots/
@@ -435,12 +453,19 @@ its port if is different from the default one.
Registers a master in a cluster. This command needs to be executed before any
standby nodes are registered.
`primary register` can be used as an alias for `master register`.
* `standby register`
Registers a standby with `repmgr`. This command needs to be executed to enable
promote/follow operations and to allow `repmgrd` to work with the node.
An existing standby can be registered using this command.
* `standby unregister`
Unregisters a standby with `repmgr`. This command does not affect the actual
replication.
* `standby clone [node to be cloned]`
Clones a new standby node from the data directory of the master (or

View File

@@ -1,6 +1,6 @@
Summary: repmgr
Name: repmgr
Version: 3.0rc4
Version: 3.0
Release: 1
License: GPLv3
Group: System Environment/Daemons

View File

@@ -1,89 +1,114 @@
#!/bin/bash
#!/bin/sh
#
# repmgrd Start up the repmgrd daemon
# repmrgd (replication manager daemon)
#
# chkconfig: - 75 16
# description: repmgrd is the repliation manager daemon \
# The repmgrd replication management and monitoring daemon for PostgreSQL.
### BEGIN INIT INFO
# Provides: repmgrd
# Required-Start: $local_fs $remote_fs $network $syslog postgresql
# Required-Stop: $local_fs $remote_fs $network $syslog postgresql
# Should-Start: $syslog postgresql-9.3
# Should-Stop: $syslog postgresql-9.3
# Short-Description: start and stop repmrgd
# Description: Enable repmgrd replication management and monitoring daemon for PostgreSQL
# this is used to monitor a postgresql cluster.
### END INIT INFO
# chkconfig: - 75 16
# description: Enable repmgrd replication management and monitoring daemon for PostgreSQL
# processname: repmgrd
# pidfile="/var/run/${NAME}.pid"
# Source function library.
. /etc/init.d/functions
INITD=/etc/rc.d/init.d
. $INITD/functions
# Source networking configuration.
# Get function listing for cross-distribution logic.
TYPESET=`typeset -f|grep "declare"`
# Get network config.
. /etc/sysconfig/network
prog=repmgrd
REPMGRD_ENABLED=yes
DESC="PostgreSQL replication management and monitoring daemon"
NAME=repmgrd
REPMGRD_ENABLED=no
REPMGRD_OPTS=
REPMGRD_USER=postgres
DAEMONIZE="-d"
REPMGRD_BIN=/usr/pgsql-9.3/bin/repmgrd
REPMGRD_PIDFILE=/var/run/repmgrd.pid
REPMGRD_LOCK=/var/lock/subsys/${NAME}
REPMGRD_LOG=/var/lib/pgsql/9.3/data/pg_log/repmgrd.log
# pull in sysconfig settings
[ -f /etc/sysconfig/repmgrd ] && . /etc/sysconfig/repmgrd
# Read configuration variable file if it is present
[ -r /etc/sysconfig/$NAME ] && . /etc/sysconfig/$NAME
LOCKFILE=/var/lock/subsys/$prog
RETVAL=0
# For SELinux we need to use 'runuser' not 'su'
if [ -x /sbin/runuser ]
then
SU=runuser
else
SU=su
fi
test -x $REPMGRD_BIN || exit 0
case "$REPMGRD_ENABLED" in
[Yy]*)
#nothing to do here
break
;;
*)
exit 2
exit 0
;;
esac
if [ -z "$REPMGRD_OPTS" ]
if [ -z "${REPMGRD_OPTS}" ]
then
echo "Not starting $prog, REPMGRD_OPTS not set in /etc/sysconfig/$prog"
exit 2
echo "Not starting ${NAME}, REPMGRD_OPTS not set in /etc/sysconfig/${NAME}"
exit 0
fi
start() {
[ "$EUID" != "0" ] && exit 4
[ "$NETWORKING" = "no" ] && exit 1
start()
{
REPMGRD_START=$"Starting ${NAME} service: "
# Start daemons.
echo -n $"Starting $prog: "
daemon --user $REPMGRD_USER $prog $DAEMONIZE $REPMGRD_OPTS
RETVAL=$?
# Make sure startup-time log file is valid
if [ ! -e "${REPMGRD_LOG}" -a ! -h "${REPMGRD_LOG}" ]
then
touch "${REPMGRD_LOG}" || exit 1
chown ${REPMGRD_USER}:postgres "${REPMGRD_LOG}"
chmod go-rwx "${REPMGRD_LOG}"
[ -x /sbin/restorecon ] && /sbin/restorecon "${REPMGRD_LOG}"
fi
echo -n "${REPMGRD_START}"
$SU -l $REPMGRD_USER -c "${REPMGRD_BIN} ${REPMGRD_OPTS} -p ${REPMGRD_PIDFILE} &" >> "${REPMGRD_LOG}" 2>&1 < /dev/null
sleep 2
pid=`head -n 1 "${REPMGRD_PIDFILE}" 2>/dev/null`
if [ "x${pid}" != "x" ]
then
success "${REPMGRD_START}"
touch "${REPMGRD_LOCK}"
echo $pid > "${REPMGRD_PIDFILE}"
echo
[ $RETVAL -eq 0 ] && touch $LOCKFILE
return $RETVAL
else
failure "${REPMGRD_START}"
echo
script_result=1
fi
}
stop() {
[ "$EUID" != "0" ] && exit 4
echo -n $"Shutting down $prog: "
killproc $prog
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f $LOCKFILE
return $RETVAL
}
status() {
if [ -f "$LOCKFILE" ]; then
echo "$prog is running"
stop()
{
echo -n $"Stopping ${NAME} service: "
if [ -e "${REPMGRD_LOCK}" ]
then
killproc ${NAME}
ret=$?
if [ $ret -eq 0 ]
then
echo_success
rm -f "${REPMGRD_PIDFILE}"
rm -f "${REPMGRD_LOCK}"
else
RETVAL=3
echo "$prog is stopped"
echo_failure
script_result=1
fi
return $RETVAL
else
# not running; per LSB standards this is "ok"
echo_success
fi
echo
}
# See how we were called.
case "$1" in
start)
@@ -93,22 +118,16 @@ case "$1" in
stop
;;
status)
status $prog
status -p $REPMGRD_PIDFILE $NAME
script_result=$?
;;
restart|force-reload)
restart)
stop
start
;;
try-restart|condrestart)
if status $prog > /dev/null; then
stop
start
fi
;;
reload)
exit 3
start
;;
*)
echo $"Usage: $0 {start|stop|status|restart|try-restart|force-reload}"
echo $"Usage: $0 {start|stop|status|restart}"
exit 2
esac
exit $script_result

View File

@@ -1,4 +1,21 @@
#default sysconfig file for repmrgd
#custom overrides can be placed here
# default settings for repmgrd. This file is source by /bin/sh from
# /etc/init.d/repmgrd
REPMGRD_OPTS="-f /etc/repmgr/repmgr.conf"
# 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="--verbose -d -f /var/lib/pgsql/repmgr/repmgr.conf"
# User to run repmgrd as
#REPMGRD_USER=postgres
# repmgrd binary
#REPMGRD_BIN=/usr/bin/repmgrd
# pid file
#REPMGRD_PIDFILE=/var/lib/pgsql/repmgr/repmgrd.pid
# log file
#REPMGRD_LOG=/var/lib/pgsql/repmgr/repmgrd.log

View File

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

27
TODO
View File

@@ -5,9 +5,15 @@ Known issues in repmgr
the database server using the ``pg_ctl`` command may accidentally
terminate after their associated ssh session ends.
* PGPASSFILE may not be passed to pg_basebackup
Planned feature improvements
============================
* Use 'primary' instead of 'master' in documentation and log output
for consistency with PostgreSQL documentation. See also commit
870b0a53b627eeb9aca1fc14cbafe25b5beafe12.
* A better check which standby did receive most of the data
* Make the fact that a standby may be delayed a factor in the voting
@@ -18,8 +24,21 @@ Planned feature improvements
* Create the repmgr user/database on "master register".
* Use pg_basebackup for the data directory, and ALSO rsync for the
configuration files.
configuration files.
* Use pg_basebackup -X s
NOTE: this can be used by including `-X s` in the configuration parameter
`pg_basebackup_options`
* If no configuration file supplied, search in sensible default locations
(currently: current directory and `pg_config --sysconfdir`); if
possible this should include the location provided by the package,
if installed.
* repmgrd: if connection to the upstream node fails on startup, optionally
retry for a certain period before giving up; this will cover cases when
e.g. primary and standby are both starting up, and the standby comes up
before the primary. See github issue #80.
* make old master node ID available for event notification commands
(See github issue #80).
* Have pg_basebackup use replication slots, if and when support for
this is added; see:
http://www.postgresql.org/message-id/555DD2B2.7020000@gmx.net

View File

@@ -23,14 +23,19 @@
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <ftw.h>
/* NB: postgres_fe must be included BEFORE check_dir */
#include "postgres_fe.h"
#include "check_dir.h"
#include <libpq-fe.h>
#include <postgres_fe.h>
#include "check_dir.h"
#include "strutil.h"
#include "log.h"
static bool _create_pg_dir(char *dir, bool force, bool for_witness);
static int unlink_dir_callback(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf);
/*
* make sure the directory either doesn't exist or is empty
* we use this function to check the new data directory and
@@ -243,6 +248,19 @@ is_pg_dir(char *dir)
bool
create_pg_dir(char *dir, bool force)
{
return _create_pg_dir(dir, force, false);
}
bool
create_witness_pg_dir(char *dir, bool force)
{
return _create_pg_dir(dir, force, true);
}
static bool
_create_pg_dir(char *dir, bool force, bool for_witness)
{
bool pg_dir = false;
@@ -279,12 +297,24 @@ create_pg_dir(char *dir, bool force)
pg_dir = is_pg_dir(dir);
/*
* we use force to reduce the time needed to restore a node which
* turn async after a failover or anything else
*/
if (pg_dir && force)
{
/*
* The witness server does not store any data other than a copy of the
* repmgr metadata, so in --force mode we can simply overwrite the
* directory.
*
* For non-witness servers, we'll leave the data in place, both to reduce
* the risk of unintentional data loss and to make it possible for the
* data directory to be brought up-to-date with rsync.
*/
if (for_witness)
{
log_notice(_("deleting existing data directory \"%s\"\n"), dir);
nftw(dir, unlink_dir_callback, 64, FTW_DEPTH | FTW_PHYS);
}
/* Let it continue */
break;
}
@@ -306,3 +336,14 @@ create_pg_dir(char *dir, bool force)
}
return true;
}
static int
unlink_dir_callback(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf)
{
int rv = remove(fpath);
if (rv)
perror(fpath);
return rv;
}

View File

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

201
config.c
View File

@@ -27,9 +27,11 @@
static void parse_event_notifications_list(t_configuration_options *options, const char *arg);
static void tablespace_list_append(t_configuration_options *options, const char *arg);
static char config_file_path[MAXPGPATH];
static bool config_file_provided = false;
/*
* parse_config()
* load_config()
*
* Set default options and overwrite with values from provided configuration
* file.
@@ -40,30 +42,21 @@ static void tablespace_list_append(t_configuration_options *options, const char
* reload_config()
*/
bool
parse_config(const char *config_file, t_configuration_options *options)
load_config(const char *config_file, t_configuration_options *options, char *argv0)
{
char *s,
buff[MAXLINELENGTH];
char config_file_buf[MAXLEN];
char name[MAXLEN];
char value[MAXLEN];
bool config_file_provided = false;
FILE *fp;
struct stat config;
/* Sanity checks */
/*
* If a configuration file was provided, check it exists, otherwise
* emit an error
* emit an error and terminate
*/
if (config_file[0])
{
struct stat config;
strncpy(config_file_path, config_file, MAXPGPATH);
canonicalize_path(config_file_path);
strncpy(config_file_buf, config_file, MAXLEN);
canonicalize_path(config_file_buf);
if(stat(config_file_buf, &config) != 0)
if (stat(config_file_path, &config) != 0)
{
log_err(_("provided configuration file '%s' not found: %s\n"),
config_file,
@@ -76,16 +69,53 @@ parse_config(const char *config_file, t_configuration_options *options)
}
/*
* If no configuration file was provided, set to a default file
* which `parse_config()` will attempt to read if it exists
* If no configuration file was provided, attempt to find a default file
*/
else
if (config_file_provided == false)
{
strncpy(config_file_buf, DEFAULT_CONFIG_FILE, MAXLEN);
char my_exec_path[MAXPGPATH];
char etc_path[MAXPGPATH];
/* First check if one is in the default sysconfdir */
if (find_my_exec(argv0, my_exec_path) < 0)
{
fprintf(stderr, _("%s: could not find own program executable\n"), argv0);
exit(EXIT_FAILURE);
}
get_etc_path(my_exec_path, etc_path);
snprintf(config_file_path, MAXPGPATH, "%s/repmgr.conf", etc_path);
log_debug(_("Looking for configuration file in %s\n"), etc_path);
if (stat(config_file_path, &config) != 0)
{
/* Not found - default to ./repmgr.conf */
strncpy(config_file_path, DEFAULT_CONFIG_FILE, MAXPGPATH);
canonicalize_path(config_file_path);
log_debug(_("Looking for configuration file in %s\n"), config_file_path);
}
}
return parse_config(options);
}
fp = fopen(config_file_buf, "r");
bool
parse_config(t_configuration_options *options)
{
FILE *fp;
char *s,
buff[MAXLINELENGTH];
char name[MAXLEN];
char value[MAXLEN];
/* For sanity-checking provided conninfo string */
PQconninfoOption *conninfo_options;
char *conninfo_errmsg = NULL;
fp = fopen(config_file_path, "r");
/*
* Since some commands don't require a config file at all, not having one
@@ -99,9 +129,9 @@ parse_config(const char *config_file, t_configuration_options *options)
*/
if (fp == NULL)
{
if(config_file_provided)
if (config_file_provided)
{
log_err(_("unable to open provided configuration file '%s'; terminating\n"), config_file_buf);
log_err(_("unable to open provided configuration file '%s'; terminating\n"), config_file_path);
exit(ERR_BAD_CONFIG);
}
@@ -149,13 +179,17 @@ parse_config(const char *config_file, t_configuration_options *options)
{
bool known_parameter = true;
/* Skip blank lines and comments */
if (buff[0] == '\n' || buff[0] == '#')
continue;
/* Parse name/value pair from line */
parse_line(buff, name, value);
/* Skip blank lines */
if (!strlen(name))
continue;
/* Skip comments */
if (name[0] == '#')
continue;
/* Copy into correct entry in parameters struct */
if (strcmp(name, "cluster") == 0)
strncpy(options->cluster_name, value, MAXLEN);
@@ -239,7 +273,7 @@ parse_config(const char *config_file, t_configuration_options *options)
* we want to accept those, we'd need to add stricter default checking,
* as currently e.g. an empty `node` value will be converted to '0'.
*/
if(known_parameter == true && !strlen(value)) {
if (known_parameter == true && !strlen(value)) {
log_err(_("no value provided for parameter '%s'\n"), name);
exit(ERR_BAD_CONFIG);
}
@@ -262,6 +296,12 @@ parse_config(const char *config_file, t_configuration_options *options)
exit(ERR_BAD_CONFIG);
}
if (options->node == 0)
{
log_err(_("'node' must be an integer greater than zero\n"));
exit(ERR_BAD_CONFIG);
}
if (*options->node_name == '\0')
{
log_err(_("required parameter 'node_name' was not found\n"));
@@ -274,6 +314,19 @@ parse_config(const char *config_file, t_configuration_options *options)
exit(ERR_BAD_CONFIG);
}
/* Sanity check the provided conninfo string
*
* NOTE: this verifies the string format and checks for valid options
* but does not sanity check values
*/
conninfo_options = PQconninfoParse(options->conninfo, &conninfo_errmsg);
if (conninfo_options == NULL)
{
log_err(_("Parameter 'conninfo' is invalid: %s"), conninfo_errmsg);
exit(ERR_BAD_CONFIG);
}
PQconninfoFree(conninfo_options);
/* The following checks are for valid parameter values */
if (options->master_response_timeout <= 0)
{
@@ -305,7 +358,7 @@ trim(char *s)
*s2 = &s[strlen(s) - 1];
/* If string is empty, no action needed */
if(s2 < s1)
if (s2 < s1)
return s;
/* Trim and delimit right side */
@@ -331,24 +384,50 @@ parse_line(char *buff, char *name, char *value)
int j = 0;
/*
* first we find the name of the parameter
* Extract parameter name, if present
*/
for (; i < MAXLEN; ++i)
{
if (buff[i] != '=')
name[j++] = buff[i];
else
if (buff[i] == '=')
break;
switch(buff[i])
{
/* Ignore whitespace */
case ' ':
case '\n':
case '\r':
case '\t':
continue;
default:
name[j++] = buff[i];
}
}
name[j] = '\0';
/*
* Now the value
* Ignore any whitespace following the '=' sign
*/
for (; i < MAXLEN; ++i)
{
if (buff[i+1] == ' ')
continue;
if (buff[i+1] == '\t')
continue;
break;
}
/*
* Extract parameter value
*/
j = 0;
for (++i; i < MAXLEN; ++i)
if (buff[i] == '\'')
continue;
else if (buff[i] == '#')
break;
else if (buff[i] != '\n')
value[j++] = buff[i];
else
@@ -358,7 +437,7 @@ parse_line(char *buff, char *name, char *value)
}
bool
reload_config(char *config_file, t_configuration_options * orig_options)
reload_config(t_configuration_options *orig_options)
{
PGconn *conn;
t_configuration_options new_options;
@@ -369,7 +448,7 @@ reload_config(char *config_file, t_configuration_options * orig_options)
*/
log_info(_("reloading configuration file and updating repmgr tables\n"));
parse_config(config_file, &new_options);
parse_config(&new_options);
if (new_options.node == -1)
{
log_warning(_("unable to parse new configuration, retaining current configuration\n"));
@@ -418,7 +497,7 @@ reload_config(char *config_file, t_configuration_options * orig_options)
return false;
}
if(strcmp(orig_options->conninfo, new_options.conninfo) != 0)
if (strcmp(orig_options->conninfo, new_options.conninfo) != 0)
{
/* Test conninfo string */
conn = establish_db_connection(new_options.conninfo, false);
@@ -438,56 +517,56 @@ reload_config(char *config_file, t_configuration_options * orig_options)
*/
/* cluster_name */
if(strcmp(orig_options->cluster_name, new_options.cluster_name) != 0)
if (strcmp(orig_options->cluster_name, new_options.cluster_name) != 0)
{
strcpy(orig_options->cluster_name, new_options.cluster_name);
config_changed = true;
}
/* conninfo */
if(strcmp(orig_options->conninfo, new_options.conninfo) != 0)
if (strcmp(orig_options->conninfo, new_options.conninfo) != 0)
{
strcpy(orig_options->conninfo, new_options.conninfo);
config_changed = true;
}
/* node */
if(orig_options->node != new_options.node)
if (orig_options->node != new_options.node)
{
orig_options->node = new_options.node;
config_changed = true;
}
/* failover */
if(orig_options->failover != new_options.failover)
if (orig_options->failover != new_options.failover)
{
orig_options->failover = new_options.failover;
config_changed = true;
}
/* priority */
if(orig_options->priority != new_options.priority)
if (orig_options->priority != new_options.priority)
{
orig_options->priority = new_options.priority;
config_changed = true;
}
/* node_name */
if(strcmp(orig_options->node_name, new_options.node_name) != 0)
if (strcmp(orig_options->node_name, new_options.node_name) != 0)
{
strcpy(orig_options->node_name, new_options.node_name);
config_changed = true;
}
/* promote_command */
if(strcmp(orig_options->promote_command, new_options.promote_command) != 0)
if (strcmp(orig_options->promote_command, new_options.promote_command) != 0)
{
strcpy(orig_options->promote_command, new_options.promote_command);
config_changed = true;
}
/* follow_command */
if(strcmp(orig_options->follow_command, new_options.follow_command) != 0)
if (strcmp(orig_options->follow_command, new_options.follow_command) != 0)
{
strcpy(orig_options->follow_command, new_options.follow_command);
config_changed = true;
@@ -504,76 +583,76 @@ reload_config(char *config_file, t_configuration_options * orig_options)
*/
/* rsync_options */
if(strcmp(orig_options->rsync_options, new_options.rsync_options) != 0)
if (strcmp(orig_options->rsync_options, new_options.rsync_options) != 0)
{
strcpy(orig_options->rsync_options, new_options.rsync_options);
config_changed = true;
}
/* ssh_options */
if(strcmp(orig_options->ssh_options, new_options.ssh_options) != 0)
if (strcmp(orig_options->ssh_options, new_options.ssh_options) != 0)
{
strcpy(orig_options->ssh_options, new_options.ssh_options);
config_changed = true;
}
/* master_response_timeout */
if(orig_options->master_response_timeout != new_options.master_response_timeout)
if (orig_options->master_response_timeout != new_options.master_response_timeout)
{
orig_options->master_response_timeout = new_options.master_response_timeout;
config_changed = true;
}
/* reconnect_attempts */
if(orig_options->reconnect_attempts != new_options.reconnect_attempts)
if (orig_options->reconnect_attempts != new_options.reconnect_attempts)
{
orig_options->reconnect_attempts = new_options.reconnect_attempts;
config_changed = true;
}
/* reconnect_intvl */
if(orig_options->reconnect_intvl != new_options.reconnect_intvl)
if (orig_options->reconnect_intvl != new_options.reconnect_intvl)
{
orig_options->reconnect_intvl = new_options.reconnect_intvl;
config_changed = true;
}
/* pg_ctl_options */
if(strcmp(orig_options->pg_ctl_options, new_options.pg_ctl_options) != 0)
if (strcmp(orig_options->pg_ctl_options, new_options.pg_ctl_options) != 0)
{
strcpy(orig_options->pg_ctl_options, new_options.pg_ctl_options);
config_changed = true;
}
/* pg_basebackup_options */
if(strcmp(orig_options->pg_basebackup_options, new_options.pg_basebackup_options) != 0)
if (strcmp(orig_options->pg_basebackup_options, new_options.pg_basebackup_options) != 0)
{
strcpy(orig_options->pg_basebackup_options, new_options.pg_basebackup_options);
config_changed = true;
}
/* monitor_interval_secs */
if(orig_options->monitor_interval_secs != new_options.monitor_interval_secs)
if (orig_options->monitor_interval_secs != new_options.monitor_interval_secs)
{
orig_options->monitor_interval_secs = new_options.monitor_interval_secs;
config_changed = true;
}
/* retry_promote_interval_secs */
if(orig_options->retry_promote_interval_secs != new_options.retry_promote_interval_secs)
if (orig_options->retry_promote_interval_secs != new_options.retry_promote_interval_secs)
{
orig_options->retry_promote_interval_secs = new_options.retry_promote_interval_secs;
config_changed = true;
}
/* use_replication_slots */
if(orig_options->use_replication_slots != new_options.use_replication_slots)
if (orig_options->use_replication_slots != new_options.use_replication_slots)
{
orig_options->use_replication_slots = new_options.use_replication_slots;
config_changed = true;
}
if(config_changed == true)
if (config_changed == true)
{
log_debug(_("reload_config(): configuration has changed\n"));
}
@@ -602,7 +681,7 @@ tablespace_list_append(t_configuration_options *options, const char *arg)
const char *arg_ptr;
cell = (TablespaceListCell *) pg_malloc0(sizeof(TablespaceListCell));
if(cell == NULL)
if (cell == NULL)
{
log_err(_("unable to allocate memory; terminating\n"));
exit(ERR_BAD_CONFIG);
@@ -670,7 +749,7 @@ parse_event_notifications_list(t_configuration_options *options, const char *arg
for (arg_ptr = arg; arg_ptr <= (arg + strlen(arg)); arg_ptr++)
{
/* ignore whitespace */
if(*arg_ptr == ' ' || *arg_ptr == '\t')
if (*arg_ptr == ' ' || *arg_ptr == '\t')
{
continue;
}
@@ -679,13 +758,13 @@ parse_event_notifications_list(t_configuration_options *options, const char *arg
* comma (or end-of-string) should mark the end of an event type -
* just as long as there was something preceding it
*/
if((*arg_ptr == ',' || *arg_ptr == '\0') && event_type_buf[0] != '\0')
if ((*arg_ptr == ',' || *arg_ptr == '\0') && event_type_buf[0] != '\0')
{
EventNotificationListCell *cell;
cell = (EventNotificationListCell *) pg_malloc0(sizeof(EventNotificationListCell));
if(cell == NULL)
if (cell == NULL)
{
log_err(_("unable to allocate memory; terminating\n"));
exit(ERR_BAD_CONFIG);
@@ -708,7 +787,7 @@ parse_event_notifications_list(t_configuration_options *options, const char *arg
dst_ptr = event_type_buf;
}
/* ignore duplicated commas */
else if(*arg_ptr == ',')
else if (*arg_ptr == ',')
{
continue;
}

View File

@@ -83,9 +83,10 @@ typedef struct
#define T_CONFIGURATION_OPTIONS_INITIALIZER { "", -1, NO_UPSTREAM_NODE, "", MANUAL_FAILOVER, -1, "", "", "", "", "", "", "", -1, -1, -1, "", "", "", "", 0, 0, 0, "", { NULL, NULL }, {NULL, NULL} }
bool parse_config(const char *config_file, t_configuration_options *options);
bool load_config(const char *config_file, t_configuration_options *options, char *argv0);
bool reload_config(t_configuration_options *orig_options);
bool parse_config(t_configuration_options *options);
void parse_line(char *buff, char *name, char *value);
char *trim(char *s);
bool reload_config(char *config_file, t_configuration_options *orig_options);
#endif

217
dbutils.c
View File

@@ -82,6 +82,72 @@ establish_db_connection_by_params(const char *keywords[], const char *values[],
}
bool
begin_transaction(PGconn *conn)
{
PGresult *res;
res = PQexec(conn, "BEGIN");
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_err(_("Unable to begin transaction: %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
}
PQclear(res);
return true;
}
bool
commit_transaction(PGconn *conn)
{
PGresult *res;
res = PQexec(conn, "COMMIT");
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_err(_("Unable to commit transaction: %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
}
PQclear(res);
return true;
}
bool
rollback_transaction(PGconn *conn)
{
PGresult *res;
res = PQexec(conn, "ROLLBACK");
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_err(_("Unable to rollback transaction: %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
}
PQclear(res);
return true;
}
bool
check_cluster_schema(PGconn *conn)
{
@@ -197,7 +263,7 @@ is_pgup(PGconn *conn, int timeout)
/*
* Return the id of the active master node, or -1 if no
* Return the id of the active master node, or NODE_NOT_FOUND if no
* record available.
*
* This reports the value stored in the database only and
@@ -224,12 +290,12 @@ get_master_node_id(PGconn *conn, char *cluster)
{
log_err(_("get_master_node_id(): query failed\n%s\n"),
PQerrorMessage(conn));
retval = -1;
retval = NODE_NOT_FOUND;
}
else if (PQntuples(res) == 0)
{
log_warning(_("get_master_node_id(): no active primary found\n"));
retval = -1;
retval = NODE_NOT_FOUND;
}
else
{
@@ -260,7 +326,7 @@ get_server_version(PGconn *conn, char *server_version)
return -1;
}
if(server_version != NULL)
if (server_version != NULL)
strcpy(server_version, PQgetvalue(res, 0, 0));
return atoi(PQgetvalue(res, 0, 0));
@@ -399,7 +465,7 @@ get_pg_setting(PGconn *conn, const char *setting, char *output)
}
}
if(success == true)
if (success == true)
{
log_debug(_("get_pg_setting(): returned value is '%s'\n"), output);
}
@@ -458,7 +524,7 @@ get_upstream_connection(PGconn *standby_conn, char *cluster, int node_id,
return NULL;
}
if(!PQntuples(res))
if (!PQntuples(res))
{
log_notice(_("no record found for upstream server"));
PQclear(res);
@@ -467,7 +533,7 @@ get_upstream_connection(PGconn *standby_conn, char *cluster, int node_id,
strncpy(upstream_conninfo, PQgetvalue(res, 0, 0), MAXCONNINFO);
if(upstream_node_id_ptr != NULL)
if (upstream_node_id_ptr != NULL)
*upstream_node_id_ptr = atoi(PQgetvalue(res, 0, 1));
PQclear(res);
@@ -509,9 +575,9 @@ get_master_connection(PGconn *standby_conn, char *cluster,
int i,
node_id;
if(master_id != NULL)
if (master_id != NULL)
{
*master_id = -1;
*master_id = NODE_NOT_FOUND;
}
/* find all nodes belonging to this cluster */
@@ -570,7 +636,7 @@ get_master_connection(PGconn *standby_conn, char *cluster,
PQclear(res1);
log_debug(_("get_master_connection(): current master node is %i\n"), node_id);
if(master_id != NULL)
if (master_id != NULL)
{
*master_id = node_id;
}
@@ -709,7 +775,7 @@ get_repmgr_schema(void)
char *
get_repmgr_schema_quoted(PGconn *conn)
{
if(strcmp(repmgr_schema_quoted, "") == 0)
if (strcmp(repmgr_schema_quoted, "") == 0)
{
char *identifier = PQescapeIdentifier(conn, repmgr_schema,
strlen(repmgr_schema));
@@ -728,6 +794,49 @@ create_replication_slot(PGconn *conn, char *slot_name)
char sqlquery[QUERY_STR_LEN];
PGresult *res;
/*
* Check whether slot exists already; if it exists and is active, that
* means another active standby is using it, which creates an error situation;
* if not we can reuse it as-is
*/
sqlquery_snprintf(sqlquery,
"SELECT active, slot_type "
" FROM pg_replication_slots "
" WHERE slot_name = '%s' ",
slot_name);
res = PQexec(conn, sqlquery);
if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
{
log_err(_("unable to query pg_replication_slots: %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
}
if (PQntuples(res))
{
if (strcmp(PQgetvalue(res, 0, 1), "physical") != 0)
{
log_err(_("Slot '%s' exists and is not a physical slot\n"),
slot_name);
PQclear(res);
}
if (strcmp(PQgetvalue(res, 0, 0), "f") == 0)
{
PQclear(res);
log_debug(_("Replication slot '%s' exists but is inactive; reusing\n"),
slot_name);
return true;
}
PQclear(res);
log_err(_("Slot '%s' already exists as an active slot\n"),
slot_name);
return false;
}
sqlquery_snprintf(sqlquery,
"SELECT * FROM pg_create_physical_replication_slot('%s')",
slot_name);
@@ -930,13 +1039,13 @@ create_node_record(PGconn *conn, char *action, int node, char *type, int upstrea
char slot_name_buf[MAXLEN];
PGresult *res;
if(upstream_node == NO_UPSTREAM_NODE)
if (upstream_node == NO_UPSTREAM_NODE)
{
/*
* No explicit upstream node id provided for standby - attempt to
* get primary node id
*/
if(strcmp(type, "standby") == 0)
if (strcmp(type, "standby") == 0)
{
int primary_node_id = get_master_node_id(conn, cluster_name);
maxlen_snprintf(upstream_node_id, "%i", primary_node_id);
@@ -951,7 +1060,7 @@ create_node_record(PGconn *conn, char *action, int node, char *type, int upstrea
maxlen_snprintf(upstream_node_id, "%i", upstream_node);
}
if(slot_name != NULL && slot_name[0])
if (slot_name != NULL && slot_name[0])
{
maxlen_snprintf(slot_name_buf, "'%s'", slot_name);
}
@@ -975,7 +1084,7 @@ create_node_record(PGconn *conn, char *action, int node, char *type, int upstrea
slot_name_buf,
priority);
if(action != NULL)
if (action != NULL)
{
log_debug(_("%s: %s\n"), action, sqlquery);
}
@@ -1006,7 +1115,7 @@ delete_node_record(PGconn *conn, int node, char *action)
" WHERE id = %d",
get_repmgr_schema_quoted(conn),
node);
if(action != NULL)
if (action != NULL)
{
log_debug(_("%s: %s\n"), action, sqlquery);
}
@@ -1037,8 +1146,8 @@ delete_node_record(PGconn *conn, int node, char *action)
*
* Note this function may be called with `conn` set to NULL in cases where
* the master node is not available and it's therefore not possible to write
* an event record. In this case, if `event_notification_command` is set a user-
* defined notification to be generated; if not, this function will have
* an event record. In this case, if `event_notification_command` is set, a
* user-defined notification to be generated; if not, this function will have
* no effect.
*/
@@ -1051,7 +1160,12 @@ create_event_record(PGconn *conn, t_configuration_options *options, int node_id,
bool success = true;
struct tm ts;
if(conn != NULL)
/* Only attempt to write a record if a connection handle was provided.
Also check that the repmgr schema has been properly intialised - if
not it means no configuration file was provided, which can happen with
e.g. `repmgr standby clone`, and we won't know which schema to write to.
*/
if (conn != NULL && strcmp(repmgr_schema, DEFAULT_REPMGR_SCHEMA_PREFIX) != 0)
{
int n_node_id = htonl(node_id);
char *t_successful = successful ? "TRUE" : "FALSE";
@@ -1114,7 +1228,7 @@ create_event_record(PGconn *conn, t_configuration_options *options, int node_id,
* current timestamp ourselves. This isn't quite the same
* format as PostgreSQL, but is close enough for diagnostic use.
*/
if(!strlen(event_timestamp))
if (!strlen(event_timestamp))
{
time_t now;
@@ -1124,7 +1238,7 @@ create_event_record(PGconn *conn, t_configuration_options *options, int node_id,
}
/* an event notification command was provided - parse and execute it */
if(strlen(options->event_notification_command))
if (strlen(options->event_notification_command))
{
char parsed_command[MAXPGPATH];
const char *src_ptr;
@@ -1140,14 +1254,14 @@ create_event_record(PGconn *conn, t_configuration_options *options, int node_id,
* (If 'event_notifications' was not provided, we assume the script
* should be executed for all events).
*/
if(options->event_notifications.head != NULL)
if (options->event_notifications.head != NULL)
{
EventNotificationListCell *cell;
bool notify_ok = false;
for (cell = options->event_notifications.head; cell; cell = cell->next)
{
if(strcmp(event, cell->event_type) == 0)
if (strcmp(event, cell->event_type) == 0)
{
notify_ok = true;
break;
@@ -1157,7 +1271,7 @@ create_event_record(PGconn *conn, t_configuration_options *options, int node_id,
/*
* Event type not found in the 'event_notifications' list - return early
*/
if(notify_ok == false)
if (notify_ok == false)
{
log_debug(_("Not executing notification script for event type '%s'\n"), event);
return success;
@@ -1189,7 +1303,7 @@ create_event_record(PGconn *conn, t_configuration_options *options, int node_id,
case 'd':
/* %d: details */
src_ptr++;
if(details != NULL)
if (details != NULL)
{
strlcpy(dst_ptr, details, end_ptr - dst_ptr);
dst_ptr += strlen(dst_ptr);
@@ -1235,3 +1349,56 @@ create_event_record(PGconn *conn, t_configuration_options *options, int node_id,
return success;
}
bool
update_node_record_set_upstream(PGconn *conn, char *cluster_name, int this_node_id, int new_upstream_node_id)
{
PGresult *res;
char sqlquery[QUERY_STR_LEN];
log_debug(_("update_node_record_set_upstream(): Updating node %i's upstream node to %i\n"), this_node_id, new_upstream_node_id);
sqlquery_snprintf(sqlquery,
" UPDATE %s.repl_nodes "
" SET upstream_node_id = %i "
" WHERE cluster = '%s' "
" AND id = %i ",
get_repmgr_schema_quoted(conn),
new_upstream_node_id,
cluster_name,
this_node_id);
res = PQexec(conn, sqlquery);
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_err(_("Unable to set new upstream node id: %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
}
PQclear(res);
return true;
}
PGresult *
get_node_record(PGconn *conn, char *cluster, int node_id)
{
char sqlquery[QUERY_STR_LEN];
sprintf(sqlquery,
"SELECT id, upstream_node_id, conninfo, type, slot_name, active "
" FROM %s.repl_nodes "
" WHERE cluster = '%s' "
" AND id = %i",
get_repmgr_schema_quoted(conn),
cluster,
node_id);
log_debug("get_node_record(): %s\n", sqlquery);
return PQexec(conn, sqlquery);
}

View File

@@ -30,6 +30,9 @@ PGconn *establish_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);
@@ -63,6 +66,7 @@ bool copy_configuration(PGconn *masterconn, PGconn *witnessconn, char *cluster_
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 delete_node_record(PGconn *conn, int node, char *action);
bool create_event_record(PGconn *conn, t_configuration_options *options, int node_id, char *event, bool successful, char *details);
bool update_node_record_set_upstream(PGconn *conn, char *cluster_name, int this_node_id, int new_upstream_node_id);
PGresult * get_node_record(PGconn *conn, char *cluster, int node_id);
#endif

View File

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

View File

@@ -35,5 +35,6 @@
#define ERR_BAD_SSH 12
#define ERR_SYS_FAILURE 13
#define ERR_BAD_BASEBACKUP 14
#define ERR_INTERNAL 15
#endif /* _ERRCODE_H_ */

26
log.c
View File

@@ -144,12 +144,32 @@ logger_init(t_configuration_options * opts, const char *ident, const char *level
{
FILE *fd;
fd = freopen(opts->logfile, "a", stderr);
/* Check if we can write to the specified file before redirecting
* stderr - if freopen() fails, stderr output will vanish into
* the ether and the user won't know what's going on.
*/
fd = fopen(opts->logfile, "a");
if (fd == NULL)
{
fprintf(stderr, "error reopening stderr to '%s': %s",
opts->logfile, strerror(errno));
stderr_log_err(_("Unable to open specified logfile '%s' for writing: %s\n"), opts->logfile, strerror(errno));
stderr_log_err(_("Terminating\n"));
exit(ERR_BAD_CONFIG);
}
fclose(fd);
stderr_log_notice(_("Redirecting logging output to '%s'\n"), opts->logfile);
fd = freopen(opts->logfile, "a", stderr);
/* It's possible freopen() may still fail due to e.g. a race condition;
as it's not feasible to restore stderr after a failed freopen(),
we'll write to stdout as a last resort.
*/
if (fd == NULL)
{
printf(_("Unable to open specified logfile %s for writing: %s\n"), opts->logfile, strerror(errno));
printf(_("Terminating\n"));
exit(ERR_BAD_CONFIG);
}
}

1014
repmgr.c

File diff suppressed because it is too large Load Diff

View File

@@ -7,8 +7,11 @@
#
# repmgr and repmgrd require these items to be configured:
# Cluster name
cluster=test
# Cluster name - this will be used by repmgr to generate its internal
# schema (pattern: "repmgr_{cluster}"); while this name will be quoted
# to preserve case, we recommend using lower case and avoiding whitespace
# to facilitate easier querying of the repmgr views and tables.
cluster=example_cluster
# Node ID and name
# (Note: we recommend to avoid naming nodes after their initial

View File

@@ -20,11 +20,9 @@
#ifndef _REPMGR_H_
#define _REPMGR_H_
#include "postgres_fe.h"
#include "libpq-fe.h"
#include "getopt_long.h"
#include <libpq-fe.h>
#include <postgres_fe.h>
#include <getopt_long.h>
#include "strutil.h"
#include "dbutils.h"
@@ -49,6 +47,7 @@
#define MANUAL_FAILOVER 0
#define AUTOMATIC_FAILOVER 1
#define NODE_NOT_FOUND -1
#define NO_UPSTREAM_NODE -1

357
repmgrd.c
View File

@@ -88,12 +88,9 @@ static void check_node_configuration(void);
static void standby_monitor(void);
static void witness_monitor(void);
static bool check_connection(PGconn *conn, const char *type);
static bool check_connection(PGconn **conn, const char *type, const char *conninfo);
static bool set_local_node_failed(void);
static bool update_node_record_set_master(PGconn *conn, int this_node_id, int old_master_node_id);
static bool update_node_record_set_upstream(PGconn *conn, int this_node_id, int new_upstream_node_id);
static void update_shared_memory(char *last_wal_standby_applied);
static void update_registration(void);
static void do_master_failover(void);
@@ -148,6 +145,8 @@ main(int argc, char **argv)
{"monitoring-history", no_argument, NULL, 'm'},
{"daemonize", no_argument, NULL, 'd'},
{"pid-file", required_argument, NULL, 'p'},
{"help", no_argument, NULL, '?'},
{"version", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0}
};
@@ -161,21 +160,7 @@ main(int argc, char **argv)
int server_version_num = 0;
progname = get_progname(argv[0]);
if (argc > 1)
{
if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
{
help(progname);
exit(SUCCESS);
}
if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
{
printf("%s %s (PostgreSQL %s)\n", progname, REPMGR_VERSION, PG_VERSION);
exit(SUCCESS);
}
}
while ((c = getopt_long(argc, argv, "f:v:mdp:", long_options, &optindex)) != -1)
while ((c = getopt_long(argc, argv, "?Vf:v:mdp:", long_options, &optindex)) != -1)
{
switch (c)
{
@@ -194,6 +179,12 @@ main(int argc, char **argv)
case 'p':
pid_file = optarg;
break;
case '?':
help(progname);
exit(SUCCESS);
case 'V':
printf("%s %s (PostgreSQL %s)\n", progname, REPMGR_VERSION, PG_VERSION);
exit(SUCCESS);
default:
usage();
exit(ERR_BAD_CONFIG);
@@ -209,7 +200,7 @@ main(int argc, char **argv)
* which case we'll need to refactor parse_config() not to abort,
* and return the error message.
*/
parse_config(config_file, &local_options);
load_config(config_file, &local_options, argv[0]);
if (daemonize)
{
@@ -268,7 +259,7 @@ main(int argc, char **argv)
server_version_num = get_server_version(my_local_conn, NULL);
if(server_version_num < MIN_SUPPORTED_VERSION_NUM)
if (server_version_num < MIN_SUPPORTED_VERSION_NUM)
{
if (server_version_num > 0)
{
@@ -284,9 +275,17 @@ main(int argc, char **argv)
terminate(ERR_BAD_CONFIG);
}
/* Retrieve record for this node from the database */
/* Retrieve record for this node from the local database */
node_info = get_node_info(my_local_conn, local_options.cluster_name, local_options.node);
/* No node record found - exit gracefully */
if (node_info.node_id == NODE_NOT_FOUND)
{
log_err(_("No metadata record found for this node - terminating\n"));
log_notice(_("HINT: was this node registered with 'repmgr (master|standby) register'?\n"));
terminate(ERR_BAD_CONFIG);
}
log_debug("node id is %i, upstream is %i\n", node_info.node_id, node_info.upstream_node_id);
/*
@@ -312,7 +311,7 @@ main(int argc, char **argv)
check_cluster_configuration(my_local_conn);
check_node_configuration();
if (reload_config(config_file, &local_options))
if (reload_config(&local_options))
{
PQfinish(my_local_conn);
my_local_conn = establish_db_connection(local_options.conninfo, true);
@@ -321,7 +320,7 @@ main(int argc, char **argv)
}
/* Log startup event */
if(startup_event_logged == false)
if (startup_event_logged == false)
{
create_event_record(master_conn,
&local_options,
@@ -335,9 +334,9 @@ main(int argc, char **argv)
log_info(_("starting continuous master connection check\n"));
/*
* Check that master is still alive.
* XXX We should also check that the
* standby servers are sending info
* Check that master is still alive.
* XXX We should also check that the
* standby servers are sending info
*/
/*
@@ -346,7 +345,7 @@ main(int argc, char **argv)
*/
do
{
if (check_connection(master_conn, "master"))
if (check_connection(&master_conn, "master", NULL))
{
sleep(local_options.monitor_interval_secs);
}
@@ -361,10 +360,10 @@ main(int argc, char **argv)
if (got_SIGHUP)
{
/*
* if we can reload, then could need to change
* if we can reload the configuration file, then could need to change
* my_local_conn
*/
if (reload_config(config_file, &local_options))
if (reload_config(&local_options))
{
PQfinish(my_local_conn);
my_local_conn = establish_db_connection(local_options.conninfo, true);
@@ -425,14 +424,14 @@ main(int argc, char **argv)
check_cluster_configuration(my_local_conn);
check_node_configuration();
if (reload_config(config_file, &local_options))
if (reload_config(&local_options))
{
PQfinish(my_local_conn);
my_local_conn = establish_db_connection(local_options.conninfo, true);
update_registration();
}
/* Log startup event */
if(startup_event_logged == false)
if (startup_event_logged == false)
{
create_event_record(master_conn,
&local_options,
@@ -476,7 +475,7 @@ main(int argc, char **argv)
* if we can reload, then could need to change
* my_local_conn
*/
if (reload_config(config_file, &local_options))
if (reload_config(&local_options))
{
PQfinish(my_local_conn);
my_local_conn = establish_db_connection(local_options.conninfo, true);
@@ -484,7 +483,7 @@ main(int argc, char **argv)
}
got_SIGHUP = false;
}
if(failover_done)
if (failover_done)
{
log_debug(_("standby check loop will terminate\n"));
}
@@ -529,9 +528,9 @@ witness_monitor(void)
* of a missing master and promotion of a standby by that standby's
* repmgrd, so we'll loop for a while before giving up.
*/
connection_ok = check_connection(master_conn, "master");
connection_ok = check_connection(&master_conn, "master", NULL);
if(connection_ok == false)
if (connection_ok == false)
{
int connection_retries;
log_debug(_("old master node ID: %i\n"), master_options.node);
@@ -582,7 +581,7 @@ witness_monitor(void)
}
}
if(connection_ok == false)
if (connection_ok == false)
{
PQExpBufferData errmsg;
initPQExpBuffer(&errmsg);
@@ -637,9 +636,9 @@ witness_monitor(void)
*/
sqlquery_snprintf(sqlquery,
"INSERT INTO %s.repl_monitor "
" (master_node, standby_node, "
" (primary_node, standby_node, "
" last_monitor_time, last_apply_time, "
" last_wal_master_location, last_wal_standby_location, "
" last_wal_primary_location, last_wal_standby_location, "
" replication_lag, apply_lag )"
" VALUES(%d, %d, "
" '%s'::TIMESTAMP WITH TIME ZONE, NULL, "
@@ -686,6 +685,7 @@ standby_monitor(void)
bool did_retry = false;
PGconn *upstream_conn;
char upstream_conninfo[MAXCONNINFO];
int upstream_node_id;
t_node_info upstream_node;
@@ -697,7 +697,7 @@ standby_monitor(void)
* no point in doing much else anyway
*/
if (!check_connection(my_local_conn, "standby"))
if (!check_connection(&my_local_conn, "standby", NULL))
{
PQExpBufferData errmsg;
@@ -723,7 +723,7 @@ standby_monitor(void)
upstream_conn = get_upstream_connection(my_local_conn,
local_options.cluster_name,
local_options.node,
&upstream_node_id, NULL);
&upstream_node_id, upstream_conninfo);
type = upstream_node_id == master_options.node
? "master"
@@ -735,11 +735,11 @@ standby_monitor(void)
* we cannot reconnect, try to get a new upstream node.
*/
check_connection(upstream_conn, type); /* this takes up to
* local_options.reconnect_attempts
* local_options.reconnect_intvl seconds
*/
check_connection(&upstream_conn, type, upstream_conninfo);
/*
* This takes up to local_options.reconnect_attempts *
* local_options.reconnect_intvl seconds
*/
if (PQstatus(upstream_conn) != CONNECTION_OK)
{
@@ -809,7 +809,7 @@ standby_monitor(void)
*/
upstream_node = get_node_info(my_local_conn, local_options.cluster_name, node_info.upstream_node_id);
if(upstream_node.type == MASTER)
if (upstream_node.type == MASTER)
{
log_debug(_("failure detected on master node (%i); attempting to promote a standby\n"),
node_info.upstream_node_id);
@@ -820,7 +820,7 @@ standby_monitor(void)
log_debug(_("failure detected on upstream node %i; attempting to reconnect to new upstream node\n"),
node_info.upstream_node_id);
if(!do_upstream_standby_failover(upstream_node))
if (!do_upstream_standby_failover(upstream_node))
{
PQExpBufferData errmsg;
initPQExpBuffer(&errmsg);
@@ -872,7 +872,7 @@ standby_monitor(void)
log_err(_("standby node has disappeared, trying to reconnect...\n"));
did_retry = true;
if (!check_connection(my_local_conn, "standby"))
if (!check_connection(&my_local_conn, "standby", NULL))
{
set_local_node_failed();
terminate(0);
@@ -917,7 +917,7 @@ standby_monitor(void)
return;
}
if(PQntuples(res) == 0)
if (PQntuples(res) == 0)
{
log_err(_("standby_monitor(): no active master found\n"));
PQclear(res);
@@ -927,18 +927,19 @@ standby_monitor(void)
active_master_id = atoi(PQgetvalue(res, 0, 0));
PQclear(res);
if(active_master_id != master_options.node)
if (active_master_id != master_options.node)
{
log_notice(_("connecting to active master (node %i)...\n"), active_master_id); \
if(master_conn != NULL)
if (master_conn != NULL)
{
PQfinish(master_conn);
}
master_conn = get_master_connection(my_local_conn,
local_options.cluster_name,
&master_options.node, NULL);
}
if (PQstatus(master_conn) != CONNECTION_OK)
PQreset(master_conn);
/*
* Cancel any query that is still being executed, so i can insert the
@@ -993,9 +994,9 @@ standby_monitor(void)
*/
sqlquery_snprintf(sqlquery,
"INSERT INTO %s.repl_monitor "
" (master_node, standby_node, "
" (primary_node, standby_node, "
" last_monitor_time, last_apply_time, "
" last_wal_master_location, last_wal_standby_location, "
" last_wal_primary_location, last_wal_standby_location, "
" replication_lag, apply_lag ) "
" VALUES(%d, %d, "
" '%s'::TIMESTAMP WITH TIME ZONE, '%s'::TIMESTAMP WITH TIME ZONE, "
@@ -1003,7 +1004,7 @@ standby_monitor(void)
" %llu, %llu) ",
get_repmgr_schema_quoted(master_conn),
master_options.node, local_options.node,
monitor_standby_timestamp, last_wal_standby_applied_timestamp,
monitor_standby_timestamp, last_wal_standby_applied_timestamp,
last_wal_master_location, last_wal_standby_received,
(long long unsigned int)(lsn_master - lsn_standby_received),
(long long unsigned int)(lsn_standby_received - lsn_standby_applied));
@@ -1101,7 +1102,7 @@ do_master_failover(void)
/* Copy details of the failed node */
/* XXX only node_id is actually used later */
if(nodes[i].type == MASTER)
if (nodes[i].type == MASTER)
{
failed_master.node_id = nodes[i].node_id;
failed_master.xlog_location = nodes[i].xlog_location;
@@ -1145,8 +1146,8 @@ do_master_failover(void)
total_nodes, visible_nodes);
/*
* am i on the group that should keep alive? if i see less than half of
* total_nodes then i should do nothing
* Am I on the group that should keep alive? If I see less than half of
* total_nodes then I should do nothing
*/
if (visible_nodes < (total_nodes / 2.0))
{
@@ -1207,7 +1208,7 @@ do_master_failover(void)
/* If position is 0/0, error */
/* XXX do we need to terminate ourselves if the queried node has a problem? */
if(xlog_recptr == InvalidXLogRecPtr)
if (xlog_recptr == InvalidXLogRecPtr)
{
log_err(_("InvalidXLogRecPtr detected on standby node %i\n"), nodes[i].node_id);
terminate(ERR_FAILOVER_FAIL);
@@ -1297,12 +1298,12 @@ do_master_failover(void)
* empty string; otherwise position is 0/0 and we need to continue
* looping until a valid LSN is reported
*/
if(xlog_recptr == InvalidXLogRecPtr)
if (xlog_recptr == InvalidXLogRecPtr)
{
if(lsn_format_ok == false)
if (lsn_format_ok == false)
{
/* Unable to parse value returned by `repmgr_get_last_standby_location()` */
if(*PQgetvalue(res, 0, 0) == '\0')
if (*PQgetvalue(res, 0, 0) == '\0')
{
log_crit(
_("unable to obtain LSN from node %i"), nodes[i].node_id
@@ -1434,25 +1435,6 @@ do_master_failover(void)
/* and reconnect to the local database */
my_local_conn = establish_db_connection(local_options.conninfo, true);
/* update node information to reflect new status */
if(update_node_record_set_master(my_local_conn, node_info.node_id, failed_master.node_id) == false)
{
appendPQExpBuffer(&event_details,
_("unable to update node record for node %i (promoted to master following failure of node %i)"),
node_info.node_id,
failed_master.node_id);
log_err("%s\n", event_details.data);
create_event_record(NULL,
&local_options,
node_info.node_id,
"repmgrd_failover_promote",
false,
event_details.data);
terminate(ERR_DB_QUERY);
}
/* update internal record for this node */
node_info = get_node_info(my_local_conn, local_options.cluster_name, local_options.node);
@@ -1501,9 +1483,9 @@ do_master_failover(void)
*/
new_master_conn = establish_db_connection(best_candidate.conninfo_str, true);
if(local_options.use_replication_slots)
if (local_options.use_replication_slots)
{
if(create_replication_slot(new_master_conn, node_info.slot_name) == false)
if (create_replication_slot(new_master_conn, node_info.slot_name) == false)
{
appendPQExpBuffer(&event_details,
@@ -1536,7 +1518,7 @@ do_master_failover(void)
my_local_conn = establish_db_connection(local_options.conninfo, true);
/* update node information to reflect new status */
if(update_node_record_set_upstream(new_master_conn, node_info.node_id, best_candidate.node_id) == false)
if (update_node_record_set_upstream(new_master_conn, local_options.cluster_name, node_info.node_id, best_candidate.node_id) == false)
{
appendPQExpBuffer(&event_details,
_("Unable to update node record for node %i (following new upstream node %i)"),
@@ -1604,7 +1586,7 @@ do_upstream_standby_failover(t_node_info upstream_node)
* Verify that we can still talk to the cluster master even though
* node upstream is not available
*/
if (!check_connection(master_conn, "master"))
if (!check_connection(&master_conn, "master", NULL))
{
log_err(_("do_upstream_standby_failover(): Unable to connect to last known master node\n"));
return false;
@@ -1628,7 +1610,7 @@ do_upstream_standby_failover(t_node_info upstream_node)
return false;
}
if(PQntuples(res) == 0)
if (PQntuples(res) == 0)
{
log_err(_("no node with id %i found"), upstream_node_id);
PQclear(res);
@@ -1636,7 +1618,7 @@ do_upstream_standby_failover(t_node_info upstream_node)
}
/* upstream node is inactive */
if(strcmp(PQgetvalue(res, 0, 1), "f") == 0)
if (strcmp(PQgetvalue(res, 0, 1), "f") == 0)
{
/*
* Upstream node is an inactive master, meaning no there are no direct
@@ -1646,7 +1628,7 @@ do_upstream_standby_failover(t_node_info upstream_node)
* provide an option to either try and find the current master and/or
* a strategy to connect to a different upstream node
*/
if(strcmp(PQgetvalue(res, 0, 4), "master") == 0)
if (strcmp(PQgetvalue(res, 0, 4), "master") == 0)
{
log_err(_("unable to find active master node\n"));
PQclear(res);
@@ -1680,7 +1662,7 @@ do_upstream_standby_failover(t_node_info upstream_node)
terminate(ERR_BAD_CONFIG);
}
if(update_node_record_set_upstream(master_conn, node_info.node_id, upstream_node_id) == false)
if (update_node_record_set_upstream(master_conn, local_options.cluster_name, node_info.node_id, upstream_node_id) == false)
{
terminate(ERR_BAD_CONFIG);
}
@@ -1693,7 +1675,7 @@ do_upstream_standby_failover(t_node_info upstream_node)
static bool
check_connection(PGconn *conn, const char *type)
check_connection(PGconn **conn, const char *type, const char *conninfo)
{
int connection_retries;
@@ -1704,7 +1686,16 @@ check_connection(PGconn *conn, const char *type)
*/
for (connection_retries = 0; connection_retries < local_options.reconnect_attempts; connection_retries++)
{
if (!is_pgup(conn, local_options.master_response_timeout))
if (*conn == NULL)
{
if (conninfo == NULL)
{
log_err("INTERNAL ERROR: *conn == NULL && conninfo == NULL");
terminate(ERR_INTERNAL);
}
*conn = establish_db_connection(conninfo, false);
}
if (!is_pgup(*conn, local_options.master_response_timeout))
{
log_warning(_("connection to %s has been lost, trying to recover... %i seconds before failover decision\n"),
type,
@@ -1722,9 +1713,9 @@ check_connection(PGconn *conn, const char *type)
}
}
if (!is_pgup(conn, local_options.master_response_timeout))
if (!is_pgup(*conn, local_options.master_response_timeout))
{
log_err(_("unable to reconnect to %s after %i seconds...\n"),
log_err(_("unable to reconnect to %s (timeout %i seconds)...\n"),
type,
local_options.master_response_timeout
);
@@ -1749,10 +1740,10 @@ set_local_node_failed(void)
{
PGresult *res;
char sqlquery[QUERY_STR_LEN];
int active_master_node_id = -1;
int active_master_node_id = NODE_NOT_FOUND;
char master_conninfo[MAXLEN];
if (!check_connection(master_conn, "master"))
if (!check_connection(&master_conn, "master", NULL))
{
log_err(_("set_local_node_failed(): Unable to connect to last known master node\n"));
return false;
@@ -1780,7 +1771,7 @@ set_local_node_failed(void)
return false;
}
if(!PQntuples(res))
if (!PQntuples(res))
{
log_err(_("no active master record found\n"));
return false;
@@ -1790,14 +1781,14 @@ set_local_node_failed(void)
strncpy(master_conninfo, PQgetvalue(res, 0, 1), MAXLEN);
PQclear(res);
if(active_master_node_id != master_options.node)
if (active_master_node_id != master_options.node)
{
log_notice(_("current active master is %i; attempting to connect\n"),
active_master_node_id);
PQfinish(master_conn);
master_conn = establish_db_connection(master_conninfo, false);
if(PQstatus(master_conn) != CONNECTION_OK)
if (PQstatus(master_conn) != CONNECTION_OK)
{
log_err(_("unable to connect to active master\n"));
return false;
@@ -1955,13 +1946,13 @@ lsn_to_xlogrecptr(char *lsn, bool *format_ok)
if (sscanf(lsn, "%X/%X", &xlogid, &xrecoff) != 2)
{
if(format_ok != NULL)
if (format_ok != NULL)
*format_ok = false;
log_err(_("incorrect log location format: %s\n"), lsn);
return 0;
}
if(format_ok != NULL)
if (format_ok != NULL)
*format_ok = true;
return (((XLogRecPtr) xlogid * 16 * 1024 * 1024 * 255) + xrecoff);
@@ -1978,17 +1969,21 @@ usage(void)
void
help(const char *progname)
{
printf(_("Usage: %s [OPTIONS]\n"), progname);
printf(_("Replicator manager daemon for PostgreSQL.\n"));
printf(_("\nOptions:\n"));
printf(_(" --help show this help, then exit\n"));
printf(_(" --version output version information, then exit\n"));
printf(_("%s: replication management daemon for PostgreSQL\n"), progname);
printf(_("\n"));
printf(_("Usage:\n"));
printf(_(" %s [OPTIONS]\n"), progname);
printf(_("\n"));
printf(_("Options:\n"));
printf(_(" -?, --help show this help, then exit\n"));
printf(_(" -V, --version output version information, then exit\n"));
printf(_(" -v, --verbose output verbose activity information\n"));
printf(_(" -m, --monitoring-history track advance or lag of the replication in every standby in repl_monitor\n"));
printf(_(" -f, --config-file=PATH path to the configuration file\n"));
printf(_(" -d, --daemonize detach process from foreground\n"));
printf(_(" -p, --pid-file=PATH write a PID file\n"));
printf(_("\n%s monitors a cluster of servers.\n"), progname);
printf(_("\n"));
printf(_("%s monitors a cluster of servers and optionally performs failover.\n"), progname);
}
@@ -2089,7 +2084,7 @@ update_registration(void)
log_err("%s\n", errmsg.data);
create_event_record(my_local_conn,
create_event_record(master_conn,
&local_options,
local_options.node,
"repmgrd_shutdown",
@@ -2231,23 +2226,12 @@ check_and_create_pid_file(const char *pid_file)
t_node_info
get_node_info(PGconn *conn, char *cluster, int node_id)
{
char sqlquery[QUERY_STR_LEN];
PGresult *res;
t_node_info node_info = {-1, NO_UPSTREAM_NODE, "", InvalidXLogRecPtr, UNKNOWN, false, false};
t_node_info node_info = { NODE_NOT_FOUND, NO_UPSTREAM_NODE, "", InvalidXLogRecPtr, UNKNOWN, false, false};
sprintf(sqlquery,
"SELECT id, upstream_node_id, conninfo, type, slot_name, active "
" FROM %s.repl_nodes "
" WHERE cluster = '%s' "
" AND id = %i",
get_repmgr_schema_quoted(conn),
local_options.cluster_name,
node_id);
res = get_node_record(conn, cluster, node_id);
log_debug("get_node_info(): %s\n", sqlquery);
res = PQexec(my_local_conn, sqlquery);
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
PQExpBufferData errmsg;
@@ -2260,7 +2244,7 @@ get_node_info(PGconn *conn, char *cluster, int node_id)
log_err("%s\n", errmsg.data);
create_event_record(my_local_conn,
create_event_record(NULL,
&local_options,
local_options.node,
"repmgrd_shutdown",
@@ -2274,7 +2258,7 @@ get_node_info(PGconn *conn, char *cluster, int node_id)
if (!PQntuples(res)) {
log_warning(_("No record found record for node %i\n"), node_id);
PQclear(res);
node_info.node_id = -1;
node_info.node_id = NODE_NOT_FOUND;
return node_info;
}
@@ -2296,139 +2280,18 @@ get_node_info(PGconn *conn, char *cluster, int node_id)
static t_server_type
parse_node_type(const char *type)
{
if(strcmp(type, "master") == 0)
if (strcmp(type, "master") == 0)
{
return MASTER;
}
else if(strcmp(type, "standby") == 0)
else if (strcmp(type, "standby") == 0)
{
return STANDBY;
}
else if(strcmp(type, "witness") == 0)
else if (strcmp(type, "witness") == 0)
{
return WITNESS;
}
return UNKNOWN;
}
static bool
update_node_record_set_master(PGconn *conn, int this_node_id, int old_master_node_id)
{
PGresult *res;
char sqlquery[QUERY_STR_LEN];
log_debug(_("Setting failed node %i inactive; marking node %i as master\n"), old_master_node_id, this_node_id);
res = PQexec(conn, "BEGIN");
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_err(_("Unable to begin transaction: %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
}
PQclear(res);
sqlquery_snprintf(sqlquery,
" UPDATE %s.repl_nodes "
" SET active = FALSE "
" WHERE cluster = '%s' "
" AND id = %i ",
get_repmgr_schema_quoted(conn),
local_options.cluster_name,
old_master_node_id);
res = PQexec(conn, sqlquery);
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_err(_("Unable to set old master node %i as inactive: %s\n"),
old_master_node_id,
PQerrorMessage(conn));
PQclear(res);
PQexec(conn, "ROLLBACK");
return false;
}
PQclear(res);
sqlquery_snprintf(sqlquery,
" UPDATE %s.repl_nodes "
" SET type = 'master', "
" upstream_node_id = NULL "
" WHERE cluster = '%s' "
" AND id = %i ",
get_repmgr_schema_quoted(conn),
local_options.cluster_name,
this_node_id);
res = PQexec(conn, sqlquery);
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_err(_("Unable to set current node %i as active master: %s\n"),
this_node_id,
PQerrorMessage(conn));
PQclear(res);
PQexec(conn, "ROLLBACK");
return false;
}
PQclear(res);
res = PQexec(conn, "COMMIT");
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_err(_("Unable to set commit transaction: %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
}
PQclear(res);
return true;
}
static bool
update_node_record_set_upstream(PGconn *conn, int this_node_id, int new_upstream_node_id)
{
PGresult *res;
char sqlquery[QUERY_STR_LEN];
log_debug(_("update_node_record_set_upstream(): Updating node %i's upstream node to %i\n"), this_node_id, new_upstream_node_id);
sqlquery_snprintf(sqlquery,
" UPDATE %s.repl_nodes "
" SET upstream_node_id = %i "
" WHERE cluster = '%s' "
" AND id = %i ",
get_repmgr_schema_quoted(conn),
new_upstream_node_id,
local_options.cluster_name,
this_node_id);
res = PQexec(conn, sqlquery);
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_err(_("Unable to set new upstream node id: %s\n"),
PQerrorMessage(conn));
PQclear(res);
return false;
}
PQclear(res);
return true;
}

View File

@@ -1,6 +1,6 @@
#ifndef _VERSION_H_
#define _VERSION_H_
#define REPMGR_VERSION "3.0dev"
#define REPMGR_VERSION "3.0.2"
#endif