On Wed, Jun 16, 2021 at 10:47 AM Roger Zhou <zz...@suse.com> wrote: > > On 6/16/21 3:03 PM, Andrei Borzenkov wrote: > > > > >>> > >>> We thought that access to storage was restored, but one step was > >>> missing so devices appeared empty. > >>> > >>> At this point I tried to restart the pacemaker. But as soon as I > >>> stopped pacemaker SBD rebooted nodes ‑ which is logical, as quorum was > >>> now lost. > >>> > >>> How to cleanly stop pacemaker in this case and keep nodes up? > >> > >> Unconfigurte sbd devices I guess. > >> > > > > Do you have *practical* suggestions on how to do it online in a > > running pacemaker cluster? Can you explain how it is going to help > > given that lack of sbd device was not the problem in the first place? > > I would translate this issue as "how to gracefully shutdown sbd to > deregister > sbd from pacemaker for the whole cluster". Seems no way to do that except > `systemctl stop corosync`. > > With that, to calm down sbd suicide, I'm thinking some tricky steps as > below > might help. Well, not sure it fits your situation as the whole. > > crm cluster run "systemctl stop pacemaker" > crm cluster run "systemctl stop corosync" > I guess this shouldn't be helpful in this situation. As I've already tried to explain before shutting down pacemaker on one of the nodes - if sbd-device can't be reached - should already be enough for the other one to suicide.
One - not less ugly than other suggestions here I'm afraid - thing coming to my mind is to right after stopping pacemaker dummy-register at the cpg-protocol. If after that you want to bring down corosync & sbd as well it should be possible to do that quickly enough - as pcs is otherwise doing with 3+ node clusters. > > BR, > Roger > > _______________________________________________ > Manage your subscription: > https://lists.clusterlabs.org/mailman/listinfo/users > > ClusterLabs home: https://www.clusterlabs.org/ >
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