[ClusterLabs] Antw: Re: questions about startup fencing

[Kristoffer Grönlund]

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...

-- 
// Kristoffer Grönlund
// kgronlund at suse.com