Release notes Changes to each &repmgr; release are documented in the release notes. Please read the release notes for all versions between your current version and the version you are plan to upgrade to before performing an upgrade, as there may be version-specific upgrade steps. See also: Thu Oct 5, 2017 repmgr 4.0 is an entirely new version of &repmgr;, providing many improvements together with some changes in the way it works. In particular changes have been made to some configuration file settings and command line options for consistency and clarity. For detailed instructions on upgrading from repmgr 3.x, see . To standardise terminology, from this release primary is used to denote the read/write node in a streaming replication cluster. master is still accepted as an alias for &repmgr; commands (e.g. repmgr master register). --dry-run: &repmgr; will attempt to perform the action as far as possible without making any changes to the database --upstream-node-id: use to specify the upstream node the standby will connect later stream from, when cloning and registering a standby. This replaces the configuration file parameter upstream_node. as the upstream node is set when the standby is initially cloned, but can change over the lifetime of an installation (due to failovers, switchovers etc.) so it's pointless/confusing keeping the original value around in repmgr.conf. repmgr --replication-user has been deprecated; it has been replaced by the configuration file option replication_user. The value (which defaults to the user provided in the conninfo string) will be stored in the &repmgr; metadata for use by and . --recovery-min-apply-delay is now a configuration file parameter recovery_min_apply_delay, to ensure the setting does not get lost when a standby follows a new upstream. repmgrd --monitoring-history is deprecated and is replaced by the configuration file option monitoring_history. This enables the setting to be changed without having to modify system service files. Required settings The following 4 parameters are mandatory in repmgr.conf: node_id node_name conninfo data_directory Renamed settings Some settings have been renamed for clarity and consistency: node is now node_id name is now node_name master_reponse_timeout is now async_query_timeout (to better indicate its purpose) The following configuration file parameters have been renamed for consistency with other parameters (and conform to the pattern used by PostgreSQL itself, which uses the prefix log_ for logging parameters): loglevel is now log_level logfile is now log_file logfacility is now log_facility Removed settings cluster has been removed upstream_node - see note about --upstream-node-id above retry_promote_interval_secsthis is now redundant due to changes in the failover/promotion mechanism; the new equivalent is primary_notification_timeout Logging changes default value for log_level is INFO rather than NOTICE. new parameter log_status_interval, which causes repmgrd to emit a status log line at the specified interval The `repmgr` shared library has been renamed from repmgr_funcs to repmgr, meaning shared_preload_libraries in postgresql.conf needs to be updated to the new name: shared_preload_libraries = 'repmgr'