Werk #7130: Fixed "Clustered services for overlapping clusters" rule while checking

Component	Checks & agents
Title	Fixed "Clustered services for overlapping clusters" rule while checking
Date	Mar 22, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0p14 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Normally each node is part of a single cluster host in Check_MK. Using the ruleset {{Clustered services for overlapping clusters}} you can assign services found on a node to different independent cluster hosts, so called overlapping clusters. This was unregarded while executing clustered services checks on the related clusters. This may result in wrong check results.

Example: Each of the two clusters {{cluster1}} and {{cluster2}} has the nodes {{node1}} and {{node2}}. On each node we have discovered a process {{Process ABC}}. Within the ruleset {{Clustered services for overlapping clusters}} we assign the service {{Process ABC}} from node {{node1}} to {{cluster1}}.

Now the service {{Process ABC}} which is assigned ot the cluster {{cluster1}} processes the data of both nodes and may return a wrong check result in the moment where {{node1}} AND {{node2}} have data for {{Process ABC}}.

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