[action] [PR:14702] [Sys Mon] Fix the service entry delete in state_db because of timer job #15121
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…ob (sonic-net#14702) Why I did it systemd stop event on service with timers can sometime delete the state_db entry for the corresponding service. Note: This won't be observed on the latest master label since the dependency on timer was removed with the recent config reload enhancement. However, it is better to have the fix since there might be some systemd services added to system health daemon in the future which may contain timers root@qa-eth-vt01-4-3700c:/home/admin# systemctl stop snmp root@qa-eth-vt01-4-3700c:/home/admin# show system-health sysready-status System is not ready - one or more services are not up Service-Name Service-Status App-Ready-Status Down-Reason ---------------------- ---------------- ------------------ ------------- <Truncated> ssh OK OK - swss OK OK - syncd OK OK - sysstat OK OK - teamd OK OK - telemetry OK OK - what-just-happened OK OK - ztp OK OK - <Truncated> Expected Should see a Down entry for SNMP instead of the entry being deleted from the STATE_DB root@qa-eth-vt01-4-3700c:/home/admin# show system-health sysready-status System is not ready - one or more services are not up Service-Name Service-Status App-Ready-Status Down-Reason ---------------------- ---------------- ------------------ ------------- <Truncated> snmp Down Down Inactive ssh OK OK - swss OK OK - syncd OK OK - sysstat OK OK - teamd OK OK - telemetry OK OK - what-just-happened OK OK - ztp OK OK - <Truncated> How I did it Happens because the timer is usually a PartOf service and thus a stop on service is propagated to timer. Fixed the logic to handle this Apr 18 02:06:47.711252 r-lionfish-16 DEBUG healthd: Main process- received event:snmp.service from source:sysbus time:2023-04-17 23:06:47 Apr 18 02:06:47.711347 r-lionfish-16 INFO healthd: check_unit_status for [ snmp.service ] Apr 18 02:06:47.722363 r-lionfish-16 INFO healthd: snmp.service service state changed to [inactive/dead] Apr 18 02:06:47.723230 r-lionfish-16 DEBUG healthd: Main process- received event:snmp.timer from source:sysbus time:2023-04-17 23:06:47 Apr 18 02:06:47.723328 r-lionfish-16 INFO healthd: check_unit_status for [ snmp.timer ] Signed-off-by: Vivek Reddy Karri <vkarri@nvidia.com>
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Original PR: #14702 |
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Why I did it
systemd stop event on service with timers can sometime delete the state_db entry for the corresponding service.
Note: This won't be observed on the latest master label since the dependency on timer was removed with the recent config reload enhancement. However, it is better to have the fix since there might be some systemd services added to system health daemon in the future which may contain timers
Expected
Should see a Down entry for SNMP instead of the entry being deleted from the STATE_DB
How I did it
Happens because the timer is usually a PartOf service and thus a stop on service is propagated to timer. Fixed the logic to handle this
How to verify it
Which release branch to backport (provide reason below if selected)
Tested branch (Please provide the tested image version)
Description for the changelog
Link to config_db schema for YANG module changes
A picture of a cute animal (not mandatory but encouraged)