Werk #15641: Prometheus: Properly Encode PromQL Queries

Component

Checks & agents

Title

Prometheus: Properly Encode PromQL Queries

Date

Sep 10, 2023

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.3.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.2.0p10	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

The Prometheus agent allows specifying PromQL queries via the option Service creation using PromQL queries. In 2.2.0, any query containing a '+' would not be encoded properly. For example, the query

up{container=".+"}

would result in a HTTP request, which is interpreted by Prometheus as

up{container=". "}

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