[ClusterLabs] Antw: Re: questions about startup fencing

[Andrei Borzenkov]

04.12.2017 18:47, Tomas Jelinek пишет:
> Dne 4.12.2017 v 16:02 Kristoffer Grönlund napsal(a):
>> 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...
>>
> 
> What issues does it solve? Which node should be the one?
> 
> How do you get the nodes out of standby mode on startup?

Is --lifetime=reboot valid for cluster properties? It is accepted by
crm_attribute and actually puts value as transient_attribute.