[ClusterLabs] Antw: Re: questions about startup fencing

Klaus Wenninger 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
> everywhere...

Really mean standby or rather maintenance to keep resources
from switching to the still alive nodes during shutdown?


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