Werk #17335: Fix rules not matching non-central cmk/site labels

Component

User interface

Title

Fix rules not matching non-central cmk/site labels

Date

Nov 26, 2024

Level

Trivial Change

Class

Bug Fix

Compatibility

Incompatible - Manual interaction might be required

Checkmk versions & editions

2.4.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p22	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Previously, agent rules that defined the "cmk/site" host label as a matching condition matched:

All hosts if the condition was cmk/site:{central_site} where {central_site} is the name of your central site.
No hosts if you specified any other cmk/site value

With this werk, we fixed an underlying bug where in the rule matching, all hosts were assigned the cmk/site:{central_site} label regardless of what site the host is being monitored on.

Attention, incompatible change:

This changes which hosts are affected by agent rules matching on the cmk/site label. If you have any agent rules matching on the cmk/site host label, your agent bakery is affected:

Any agent rules matching on the cmk/site host label of a remote site now no longer matches on hosts of the central site, only on hosts of that remote site.

Any agent rules matching on the cmk/site host label of the central site now no longer matches hosts of ALL sites, only on hosts of the central site.

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