One or more resources restart throughout the cluster when a node joins in a RHEL 6 or 7 High Availability cluster with pacemaker

Solution Unverified - Updated -

Issue

  • When a node leaves the cluster, all services are correctly live-migrated / relocated to other cluster nodes and everything seems to work fine. But when the node re-joins the cluster, all services on all nodes get restarted
  • When we pcs cluster start on a node, all of the other nodes restart their copy of a clone resource. Why did node42 restart the fs resource?
Oct 19 13:07:52 [1280] node42    pengine:     info: LogActions:      Leave      dlm:0       (Started                    node42)
Oct 19 13:07:52 [1280] node42    pengine:   notice: LogAction:     * Start      dlm:1       (                           node41 )
Oct 19 13:07:52 [1280] node42    pengine:     info: LogActions:      Leave      clvmd:0     (Started                    node42
Oct 19 13:07:52 [1280] node42    pengine:   notice: LogAction:     * Start      clvmd:1     (                           node41 )
Oct 19 13:07:52 [1280] node42    pengine:   notice: LogAction:     * Restart    fs:0        (                           node42)   due to required clvmd-clone running
Oct 19 13:07:52 [1280] node42    pengine:   notice: LogAction:     * Start      fs:1        (                           node41)
  • I see all of our resources restart throughout the cluster whenever a node starts up

Environment

  • Red Hat Enterprise Linux (RHEL) 6 or 7 with the High Availability Add On
  • pacemaker
  • One or more clone resources in the CIB
    • At least one clone resource does not have interleave=true in its meta options
      • NOTE: See the Diagnostic Steps to determine if this is the case
    • At least one of those clone resources without interleave=true has other resources ordered after it via a constraint or group

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