Werk #18694: mk_job: use environment MK_VARDIR value if set

Component	Checks & agents
Title	mk_job: use environment MK_VARDIR value if set
Date	Oct 22, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Incompatible - Manual interaction might be required
Checkmk versions & editions	2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.4.0p15 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Previously, the mk-job script always redefined the MK_VARDIR variable at the beginning of execution.

The script will now use the existing MK_VARDIR environment variable if it is set. If the variable is not set, the script will fall back to its default, hard-coded value.

This werk is flagged as potentially incompatible because it alters how the script uses MK_VARDIR. Customers who previously relied on the script overwriting a value should verify their setup to ensure the script now executes under the desired conditions.

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