Re: [ClusterLabs] reboot node / cluster standby
On 06/29/2017 01:38 PM, Ludovic Vaugeois-Pepin wrote: > On Thu, Jun 29, 2017 at 7:27 PM, Ken Gaillot wrote: >> On 06/29/2017 04:42 AM, philipp.achmuel...@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. ___ Users mailing list: Users@clusterlabs.org http://lists.clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
Re: [ClusterLabs] reboot node / cluster standby
On Thu, Jun 29, 2017 at 7:27 PM, Ken Gaillot wrote: > On 06/29/2017 04:42 AM, philipp.achmuel...@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? > 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. > > ___ > Users mailing list: Users@clusterlabs.org > http://lists.clusterlabs.org/mailman/listinfo/users > > Project Home: http://www.clusterlabs.org > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf > Bugs: http://bugs.clusterlabs.org -- Ludovic ___ Users mailing list: Users@clusterlabs.org http://lists.clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
Re: [ClusterLabs] reboot node / cluster standby
On 06/29/2017 04:42 AM, philipp.achmuel...@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. 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. ___ Users mailing list: Users@clusterlabs.org http://lists.clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
