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Problem
If you experience that the Checkmk agent is failing with systemd with some of the following messages:
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Nov 19 23:24:48 <hostname> systemd[1]: Starting Checkmk agent (<$IP_OF_CHECKMK_SERVER>58616)... Nov 19 23:24:49 <hostname> systemd[1]: check-mk-agent@99999-<$IP_OF_HOST>:6556-<$IP_OF_CHECKMK_SERVER>58616.service failed to run 'stop-post' task: Transport endpoint is not connected Nov 19 23:24:49 <hostname> systemd[1]: Failed to start Checkmk agent (<$IP_OF_CHECKMK_SERVER>58616). Nov 19 23:24:49 <hostname> systemd[1]: Unit check-mk-agent@99999-<$IP_OF_HOST>:6556-<$IP_OF_CHECKMK_SERVER>58616.service entered failed state. Nov 19 23:24:49 <hostname>systemd[1]: check-mk-agent@99999-<$IP_OF_HOST>:6556-<$IP_OF_CHECKMK_SERVER>58616.service failed. |
Reason
The root cause is that CentOS 7 is shipping an old systemd version. Checkmk requires systemd >=235.
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This is caused by Werk #12153
Solution
Then there are two options to resolve this issue.
- Contact the agent through xinetd or SSH. For xinetd, have a look at the rule set:
Checkmk agent network service (Linux) - Upgrade to a suitable (preferably binary-compatible) alternative (e.g., Rocky Linux or AlmaLinux)
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