What does "notify" operation do in pacemaker cluster?

Solution Verified - Updated -

Issue

Besides monitoring operation there are records of notify operations in cluster logs. What these notify messages mean?

 Nov 20 01:26:01 node1 crmd[798]:  notice: Result of notify operation for DB2 on node1: 0 (ok)
 Nov 20 01:26:01 node1 crmd[798]:  notice: Initiating notify operation DB2_post_notify_demote_0 on node2
 Nov 20 01:26:01 node1 crmd[798]:  notice: Initiating notify operation DB2_pre_notify_stop_0 locally on node1

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • pacemaker cluster with clone or promoted/demoted resource

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