[ClusterLabs] reboot node / cluster standby

[Ken Gaillot]

On 06/29/2017 01:38 PM, Ludovic Vaugeois-Pepin wrote:
> On Thu, Jun 29, 2017 at 7:27 PM, Ken Gaillot <kgaillot at redhat.com> wrote:
>> On 06/29/2017 04:42 AM, philipp.achmueller at arz.at wrote:
>>> Hi,
>>>
>>> In order to reboot a Clusternode i would like to set the node to standby
>>> first, so a clean takeover for running resources can take in place.
>>> Is there a default way i can set in pacemaker, or do i have to setup my
>>> own systemd implementation?
>>>
>>> thank you!
>>> regards
>>> ------------------------
>>> env:
>>> Pacemaker 1.1.15
>>> SLES 12.2
>>
>> If a node cleanly shuts down or reboots, pacemaker will move all
>> resources off it before it exits, so that should happen as you're
>> describing, without needing an explicit standby.
> 
> This makes me wonder about timeouts. Specifically OS/systemd timeouts.
> Say the node being shut down or rebooted holds a resource as a master,
> and it takes a while for the demote to complete, say 100 seconds (less
> than the demote timeout of 120s in this hypothetical scenario).  Will
> the OS/systemd wait until pacemaker exits cleanly on a regular CentOS
> or Debian?

Yes. The pacemaker systemd unit file uses TimeoutStopSec=30min.

> 
> 
>> Explicitly doing standby first would be useful mainly if you want to
>> manually check the results of the takeover before proceeding with the
>> reboot, and/or if you want the node to come back in standby mode next
>> time it joins.