Werk #19280: Fix multipath broken paths check

Component

Checks & agents

Title

Fix multipath broken paths check

Date

Jan 22, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Incompatible - Manual interaction might be required

Checkmk versions & editions

2.6.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.5.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.4.0p23 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p44 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

The multipath check plugin previously triggered a CRIT alert if there was at least one broken path.

With this change, the check behavior has been adjusted:

If levels are configured in the rule "Linux and Solaris Multipath Count", the configured levels are used as before.

If no levels are configured, the check compares the number of active paths with the total number of discovered paths and reports WARN when they differ.

Broken paths are now always reported as an additional OK result in the service output and no longer directly influence the check state.

This changes the default alerting behavior from CRIT to WARN when broken paths are present and no levels are configured, and is therefore not backward compatible.

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