红帽全球峰会31.7. Upgrading remote nodes and guest nodes
If the pacemaker_remote service is stopped on an active remote node or guest node, the cluster will gracefully migrate resources off the node before stopping the node. This allows you to perform software upgrades and other routine maintenance procedures without removing the node from the cluster. Once pacemaker_remote is shut down, however, the cluster will immediately try to reconnect. If pacemaker_remote is not restarted within the resource’s monitor timeout, the cluster will consider the monitor operation as failed.
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
Stop the node’s connection resource with the
pcs resource disable resourcenamecommand, which will move all services off the node. The connection resource would be theocf:pacemaker:remoteresource for a remote node or, commonly, theocf:heartbeat:VirtualDomainresource 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, usingvirsh) to perform any maintenance.pcs resource disable resourcename- Perform the required maintenance.
When ready to return the node to the cluster, re-enable the resource with the
pcs resource enablecommand.pcs resource enable resourcename
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