Upgrade remote nodes and guest nodes

Stopping the pacemaker_remote service on an active node triggers a graceful resource migration, enabling seamless maintenance. However, the cluster attempts to reconnect immediately. If the service does not restart within the monitor timeout, the cluster detects a failure.

About this task

To avoid monitor failures when the pacemaker_remote service is stopped on an active Pacemaker Remote node, use the following procedure to take the node out of the cluster before performing any system administration that might stop pacemaker_remote.

Procedure

  1. Stop the node’s connection resource with the pcs resource disable resourcename command, which will move all services off the node. The connection resource would be the ocf:pacemaker:remote resource for a remote node or, commonly, the ocf:heartbeat:VirtualDomain resource for a guest node. For guest nodes, this command will also stop the VM, so the VM must be started outside the cluster (for example, using virsh) to perform any maintenance. 
    # pcs resource disable resourcename
  2. Perform the required maintenance.
  3. When ready to return the node to the cluster, re-enable the resource with the pcs resource enable command. 
    # pcs resource enable resourcename