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Werk #14561: Prometheus: allow operation of special agent without querying targets endpoint

Component Checks & agents
Title Prometheus: allow operation of special agent without querying targets endpoint
Date Oct 3, 2022
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.2.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.1.0p15 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT
2.0.0p30 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

Previously, the Prometheus special agent would query the endpoint /api/v1/targets regardless of what was configured in the Prometheus rule. This was an additional burden on users, which did not specify any scrape targets and therefore do not need this endpoint. E.g., it can lead to additional timeouts. With this werk, the endpoint /api/v1/targets is only queried if necessary.

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