[ClusterLabs] Redundant entries in log

[Ken Gaillot]

Hi,

Something is triggering a new transition. The most likely candidate is
a low value for cluster-recheck-interval.

Many years ago, a low cluster-recheck-interval was necessary to make
certain things like failure-timeout more timely, but that has not been
the case in a long time. It should be left to default (15 minutes) in
the vast majority of cases. (A new transition will still occur on that
schedule, but that's reasonable.)

On Wed, 2023-11-29 at 10:05 +0000, Jean-Baptiste Skutnik via Users
wrote:
> Hello all,
> 
> I am managing a cluster using pacemaker for high availability. I am
> parsing the logs for relevant information on the cluster health and
> the logs are full of the following:
> 
> ```
> Nov 29 09:17:41 esvm2 pacemaker-controld[2893]:  notice: State
> transition S_IDLE -> S_POLICY_ENGINE
> Nov 29 09:17:41 esvm2 pacemaker-schedulerd[2892]:  notice: Calculated
> transition 8629, saving inputs in /var/lib/pacemaker/pengine/pe-
> input-250.bz2
> Nov 29 09:17:41 esvm2 pacemaker-controld[2893]:  notice: Transition
> 8629 (Complete=0, Pending=0, Fired=0, Skipped=0, Incomplete=0,
> Source=/var/lib/pacemaker/pengine/pe-input-250.bz2): Complete
> Nov 29 09:17:41 esvm2 pacemaker-controld[2893]:  notice: State
> transition S_TRANSITION_ENGINE -> S_IDLE
> Nov 29 09:18:41 esvm2 pacemaker-controld[2893]:  notice: State
> transition S_IDLE -> S_POLICY_ENGINE
> Nov 29 09:18:41 esvm2 pacemaker-schedulerd[2892]:  notice: Calculated
> transition 8630, saving inputs in /var/lib/pacemaker/pengine/pe-
> input-250.bz2
> Nov 29 09:18:41 esvm2 pacemaker-controld[2893]:  notice: Transition
> 8630 (Complete=0, Pending=0, Fired=0, Skipped=0, Incomplete=0,
> Source=/var/lib/pacemaker/pengine/pe-input-250.bz2): Complete
> Nov 29 09:18:41 esvm2 pacemaker-controld[2893]:  notice: State
> transition S_TRANSITION_ENGINE -> S_IDLE
> Nov 29 09:19:41 esvm2 pacemaker-controld[2893]:  notice: State
> transition S_IDLE -> S_POLICY_ENGINE
> Nov 29 09:19:41 esvm2 pacemaker-schedulerd[2892]:  notice: Calculated
> transition 8631, saving inputs in /var/lib/pacemaker/pengine/pe-
> input-250.bz2
> Nov 29 09:19:41 esvm2 pacemaker-controld[2893]:  notice: Transition
> 8631 (Complete=0, Pending=0, Fired=0, Skipped=0, Incomplete=0,
> Source=/var/lib/pacemaker/pengine/pe-input-250.bz2): Complete
> Nov 29 09:19:41 esvm2 pacemaker-controld[2893]:  notice: State
> transition
> ...
> ```
> 
> The transition IDs seem to differ however the file containing the
> transition data stays the same, implying that the transition does not
> affect the cluster. (/var/lib/pacemaker/pengine/pe-input-250.bz2)
> 
> I noticed the option to restrict the logging to higher levels however
> some valuable information is logged under the `notice` level and I
> would like to keep it in the logs.
> 
> Please let me know if I am doing something wrong or if there is a way
> to turn off these messages.
> 
> Thanks,
> 
> Jean-Baptiste Skutnik
> _______________________________________________

-- 
Ken Gaillot <kgaillot at redhat.com>