repmgr and repmgrd
use a common configuration file, by default called
repmgr.conf (although any name can be used if explicitly specified).
repmgr.conf must contain a number of required parameters, including
the database connection string for the local node and the location
of its data directory; other values will be inferred from defaults if
not explicitly supplied. See section required configuration file settings
for more details.
repmgr.conf is a plain text file with one parameter/value
combination per line.
Whitespace is insignificant (except within a quoted parameter value) and blank lines are ignored.
Hash marks (#) designate the remainder of the line as a comment.
Parameter values that are not simple identifiers or numbers should be single-quoted.
To embed a single quote in a parameter value, write either two quotes (preferred) or backslash-quote.
Example of a valid repmgr.conf file:
# repmgr.conf node_id=1 node_name= node1 conninfo ='host=node1 dbname=repmgr user=repmgr connect_timeout=2' data_directory = '/var/lib/pgsql/12/data'
Beginning with repmgr 5.0, configuration file parsing has been tightened up and now matches the way PostgreSQL itself parses configuration files.
This means repmgr.conf files used with earlier repmgr
versions may need slight modification before they can be used with repmgr 5
and later.
The main change is that repmgr requires most string values to be enclosed in single quotes. For example, this was previously valid:
conninfo=host=node1 user=repmgr dbname=repmgr connect_timeout=2
but must now be changed to:
conninfo='host=node1 user=repmgr dbname=repmgr connect_timeout=2'
The following sections document some sections of the configuration file:
For a full list of annotated configuration items, see the file repmgr.conf.sample.
For repmgrd-specific settings, see Chapter 13.
The following parameters in the configuration file can be overridden with command line options:
-L/--log-level overrides log_level in
repmgr.conf
-b/--pg_bindir overrides pg_bindir in
repmgr.conf
The configuration file will be searched for in the following locations:
a configuration file specified by the -f/--config-file command line option
a location specified by the package maintainer (if repmgr as installed from a package and the package maintainer has specified the configuration file location)
repmgr.conf in the local directory
/etc/repmgr.conf
the directory reported by pg_config --sysconfdir
In examples provided in this documentation, it is assumed the configuration file is located
at /etc/repmgr.conf. If repmgr is installed from a package, the
configuration file will probably be located at another location specified by the packager;
see appendix Package details for configuration file locations in
different packaging systems.
Note that if a file is explicitly specified with -f/--config-file,
an error will be raised if it is not found or not readable, and no attempt will be made to
check default locations; this is to prevent repmgr unexpectedly
reading the wrong configuration file.
If providing the configuration file location with -f/--config-file,
avoid using a relative path, particularly when executing repmgr primary register
and repmgr standby register, as repmgr stores the configuration file location
in the repmgr metadata for use when repmgr is executed remotely (e.g. during
repmgr standby switchover). repmgr will attempt to convert the
a relative path into an absolute one, but this may not be the same as the path you
would explicitly provide (e.g. ./repmgr.conf might be converted
to /path/to/./repmgr.conf, whereas you'd normally write
/path/to/repmgr.conf).
When upgrading the PostgreSQL cluster to a new major version, repmgr.conf
will probably needed to be updated.
Usually pg_bindir and data_directory will need to be modified,
particularly if the default package locations are used, as these usually change.
It's also possible the location of repmgr.conf itself will change
(e.g. from /etc/repmgr/11/repmgr.conf to /etc/repmgr/12/repmgr.conf).
This is stored as part of the repmgr metadata and is used by repmgr to execute repmgr remotely
(e.g. during a switchover operation).
If the content and/or location of repmgr.conf has changed, the repmgr metadata
needs to be updated to reflect this. The repmgr metadata can be updated on each node with: