[ClusterLabs] Antw: Re: questions about startup fencing
kwenning at redhat.com
Mon Dec 4 10:20:38 EST 2017
On 12/04/2017 04:02 PM, Kristoffer Grönlund wrote:
> Tomas Jelinek <tojeline at redhat.com> writes:
>>> * how is it shutting down the cluster when issuing "pcs cluster stop --all"?
>> First, it sends a request to each node to stop pacemaker. The requests
>> are sent in parallel which prevents resources from being moved from node
>> to node. Once pacemaker stops on all nodes, corosync is stopped on all
>> nodes in the same manner.
>>> * any race condition possible where the cib will record only one node up before
>>> the last one shut down?
>>> * will the cluster start safely?
> That definitely sounds racy to me. The best idea I can think of would be
> to set all nodes except one in standby, and then shutdown pacemaker
Really mean standby or rather maintenance to keep resources
from switching to the still alive nodes during shutdown?
More information about the Users