Werk #18463: Add backend metrics & fix backend states of HAproxy check plugin

Component

Checks & agents

Title

Add backend metrics & fix backend states of HAproxy check plugin

Date

Aug 7, 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)
2.4.0p10	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

The metrics for the number of active backends of the HAproxy were missing. Further the state of backends without any active servers were shown as CRIT instead of OK. Also the backend stats state in the service summary of the uptime was always 'UP' for any state of the backend.

This now has been fixed.

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