Configuring EFM v23

TPA installs and configures EFM when failover_manager is set to efm.

You need a valid subscription to EDB's package repositories to obtain EFM packages.

EFM configuration

TPA generates efm.nodes and efm.properties with the appropriate instance-specific settings or default values. TPA also installs an efm.notification.sh script, which does nothing by default. You can fill it in however you want.

See the EFM documentation for more details on configuring EFM.

efm_conf_settings

You can use efm_conf_settings to set any parameters, whether or not TPA recognizes them. Where needed, you need to quote the value exactly as you would if you were editing efm.properties manually:

cluster_vars:
  efm_conf_settings:
     standby.restart.delay: 1
     application.name: quarry
     reconfigure.num.sync: true
     reconfigure.num.sync.max: 1
     reconfigure.sync.primary: true

If you change efm_conf_settings, TPA always restarts EFM to activate the changes.

EFM witness

TPA installs and configures EFM as a witness on instances whose role contains efm-witness.

Repmgr

EFM doesn't provide a way to create new replicas. TPA uses repmgr to create replicas for Postgres versions 11 and earlier. Although repmgr packages are installed in this case, the repmgrd daemon remains disabled when EFM is in use.

For Postgres versions 12 and later, any cluster that uses EFM uses pg_basebackup to create standby nodes and doesn't use repmgr in any form.

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Barman

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