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Normally (outside of log level DEBUG) repmgrd doesn't generate any kind of log output, so examining the log file may give the impression it's not working. Output an informational message at regular intervals to show it's up and running.
repmgr: Replication Manager for PostgreSQL
repmgr is a suite of open-source tools to manage replication and failover
within a cluster of PostgreSQL servers. It enhances PostgreSQL's built-in
replication capabilities with utilities to set up standby servers, monitor
replication, and perform administrative tasks such as failover or switchover
operations.
repmgr 4 is a complete rewrite of the existing repmgr codebase.
Supports PostgreSQL 9.6 and later; support for 9.3 has been dropped, 9.4/9.5 may be supported if feasible.
Building from source
Simply:
./configure && make install
Ensure pg_config for the target PostgreSQL version is in $PATH.
Commands
Currently available:
repmgr primary register
repmgr primary unregister
repmgr standby clone
repmgr standby register
repmgr standby unregister
repmgr standby promote
repmgr standby follow
repmgr cluster event [--all] [--node-id] [--node-name] [--event] [--event-matching]
Backwards compatibility
See also: doc/changes-in-repmgr4.md
repmgr is now implemented as a PostgreSQL extension. NOTE: no need to
install the extension, this will be done automatically by repmgr primary register.
Metadata tables have been revised and are not backwards-compatible with 3.x. (however future DDL updates will be easier as they can be carried out via the ALTER EXTENSION mechanism.
TODO: extension upgrade script for pre-4.0
Some configuration items have had their names changed for consistency
and clarity e.g. node => node_id. repmgr will issue a warning
about deprecated/altered options.
Some configuration items have been changed to command line options, and vice-versa, e.g. to avoid hard-coding things like a node's upstream ID which might change.
TODO: possibly add a config file conversion script/function.