Werk #12317: Windows agent reinstalls Python module instantly

Component	Checks & agents
Title	Windows agent reinstalls Python module instantly
Date	Mar 16, 2021
Level	Prominent Change
Class	New Feature
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 2.0.0p2 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Previously, automatic update of the Windows agent with Python module installed has lead to long delays in the monitoring - up to few minutes, because the installation of the Python module requires a lot of CPU time.

Since this release the problem is solved. Windows agent instead of the uninstalling of the Python module in it's uninstallation phase, moves the module to the temporary cache. If incoming installation of the Windows agent uses the same version og Python module, then Python module will be moved from cache to the ProgramData directory. If the versions are different, then old method will be used, i.e. full installation.

Because changing of the version of the Python module happens very rarely, the usual update of the Windows agent requires no more than few seconds.

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