Werk #22523: pvecm_status: Report unavailable cluster state instead of crashing

Component

Checks & agents

Title

pvecm_status: Report unavailable cluster state instead of crashing

Date

Sep 29, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

3.0.0b1 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0p15	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p38 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

If the pvecm status output of a Proxmox VE node did not contain the usual cluster values (for example because the command only printed an error message), the PVE Cluster State service crashed with KeyError: 'nodes'.

This happens, for example, on a cluster node whose corosync service is down. The service now goes CRIT and shows the message printed by pvecm status, e.g. Cluster state unavailable: Cannot initialize CMAP service. The details list the cluster values that are missing from the agent output.

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