Werk #18885: kube: KeyError: 'user'

Component	Checks & agents
Title	kube: KeyError: 'user'
Date	Dec 1, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.4.0p18 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Previously, the special agents agent_kube and agent_prometheus could crash with

  File "/omd/sites/test/lib/python3/cmk/special_agents/utils/node_exporter.py", line 370, in _process_kernel_info
    "{cpu} {user} {nice} {system} {idle} {iowait} {irq} "
KeyError: 'user'

This would occur if the Prometheus endpoint reported node_cpu_guest_seconds_total, but omitted node_cpu_seconds_total for a specific node.

With this Werk, the special agents will continue collecting monitoring information in the absence of node_cpu_seconds_total. The section with the missing data will be omitted, since the check plug-in kernel_util cannot function without this data.

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