[ClusterLabs] crm node stays online after issuing node standby command

[Priyanka Balotra]

+Ayush

Thanks


On Wed, 15 Mar 2023 at 8:17 PM, Ken Gaillot <kgaillot at redhat.com> wrote:

> Hi,
>
> If you can reproduce the problem, the following info would be helpful:
>
> * "cibadmin -Q | grep standby" : to show whether it was successfully
> recorded in the CIB (will show info for any node with standby, but the
> XML ID likely has the node name or ID in it)
>
> * "attrd_updater -Q -n standby -N FILE-2" : to show whether the
> attribute manager has the right value in memory for the affected node
>
>
> On Wed, 2023-03-15 at 15:51 +0530, Ayush Siddarath wrote:
> > Hi All,
> >
> > We are seeing an issue as part of crm maintenance operations. As part
> > of the upgrade process, the crm nodes are put into standby mode.
> > But it's observed that one of the nodes fails to go into standby mode
> > despite the "crm node standby" returning success.
> >
> > Commands issued to put nodes into maintenance :
> >
> > > [2023-03-15 06:07:08 +0000] [468] [INFO] changed: [FILE-1] =>
> > > {"changed": true, "cmd": "/usr/sbin/crm node standby FILE-1",
> > > "delta": "0:00:00.442615", "end": "2023-03-15 06:07:08.150375",
> > > "rc": 0, "start": "2023-03-15 06:07:07.707760", "stderr": "",
> > > "stderr_lines": [], "stdout": "\u001b[32mINFO\u001b[0m: standby
> > > node FILE-1", "stdout_lines": ["\u001b[32mINFO\u001b[0m: standby
> > > node FILE-1"]}
> > > .
> > > [2023-03-15 06:07:08 +0000] [468] [INFO] changed: [FILE-2] =>
> > > {"changed": true, "cmd": "/usr/sbin/crm node standby FILE-2",
> > > "delta": "0:00:00.459407", "end": "2023-03-15 06:07:08.223749",
> > > "rc": 0, "start": "2023-03-15 06:07:07.764342", "stderr": "",
> > > "stderr_lines": [], "stdout": "\u001b[32mINFO\u001b[0m: standby
> > > node FILE-2", "stdout_lines": ["\u001b[32mINFO\u001b[0m: standby
> > > node FILE-2"]}
> >
> >       ........
> >
> > Crm status o/p after above command execution:
> >
> > > FILE-2:/var/log # crm status
> > > Cluster Summary:
> > >   * Stack: corosync
> > >   * Current DC: FILE-1 (version 2.1.2+20211124.ada5c3b36-
> > > 150400.2.43-2.1.2+20211124.ada5c3b36) - partition with quorum
> > >   * Last updated: Wed Mar 15 08:32:27 2023
> > >   * Last change:  Wed Mar 15 06:07:08 2023 by root via cibadmin on
> > > FILE-4
> > >   * 4 nodes configured
> > >   * 11 resource instances configured (5 DISABLED)
> > > Node List:
> > >   * Node FILE-1: standby (with active resources)
> > >   * Node FILE-3: standby (with active resources)
> > >   * Node FILE-4: standby (with active resources)
> > >   * Online: [ FILE-2 ]
> >
> > pacemaker logs indicate that FILE-2 received the commands to put it
> > into standby.
> >
> > > FILE-2:/var/log # grep standby /var/log/pacemaker/pacemaker.log
> > > Mar 15 06:07:08.098 FILE-2 pacemaker-based     [8635]
> > > (cib_perform_op)  info: ++
> > >    <nvpair id="num-1-instance_attributes-standby" name="standby"
> > > value="on"/>
> > > Mar 15 06:07:08.166 FILE-2 pacemaker-based     [8635]
> > > (cib_perform_op)  info: ++
> > >    <nvpair id="num-3-instance_attributes-standby" name="standby"
> > > value="on"/>
> > > Mar 15 06:07:08.170 FILE-2 pacemaker-based     [8635]
> > > (cib_perform_op)  info: ++
> > >    <nvpair id="num-2-instance_attributes-standby" name="standby"
> > > value="on"/>
> > > Mar 15 06:07:08.230 FILE-2 pacemaker-based     [8635]
> > > (cib_perform_op)  info: ++
> > >    <nvpair id="num-4-instance_attributes-standby" name="standby"
> > > value="on"/>
> >
> >
> > Issue is quite intermittent and observed on other nodes as well.
> > We have seen a similar issue when we try to remove the node from
> > standby mode (using crm node online) command. One/more nodes fails to
> > get removed from standby mode.
> >
> > We suspect it could be an issue with parallel execution of node
> > standby/online command for all nodes but this issue wasn't observed
> > with pacemaker packaged with SLES15 SP2 OS.
> >
> > I'm attaching the pacemaker.log from FILE-2 for analysis. Let us know
> > if any additional information is required.
> >
> > OS: SLES15 SP4
> > Pacemaker version -->
> >  crmadmin --version
> > Pacemaker 2.1.2+20211124.ada5c3b36-150400.2.43
> >
> > Thanks,
> > Ayush
> >
> > _______________________________________________
> > Manage your subscription:
> > https://lists.clusterlabs.org/mailman/listinfo/users
> >
> > ClusterLabs home: https://www.clusterlabs.org/
> --
> Ken Gaillot <kgaillot at redhat.com>
>
> _______________________________________________
> Manage your subscription:
> https://lists.clusterlabs.org/mailman/listinfo/users
>
> ClusterLabs home: https://www.clusterlabs.org/
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.clusterlabs.org/pipermail/users/attachments/20230315/fc8fd1a0/attachment.htm>