Werk #15606: Show explanation message instead of crashing

Component	Dynamic host configuration
Title	Show explanation message instead of crashing
Date	Apr 21, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Not yet released Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.3.0b1 Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0b5 Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p27 Checkmk Enterprise (CEE), Checkmk MSP (CME)

Previously, if the DCD tried to contact a remote site, then it would show the error

  File "/omd/sites/heute/lib/python3/cmk/cee/dcd/connectors/utils.py", line 221, in _execute_sync
    phase1_result = self._fetch_phase1_result_from_remote_site()
  File "/omd/sites/heute/lib/python3/cmk/cee/dcd/connectors/utils.py", line 259, in _fetch_phase1_result_from_remote_site
    phase_one_result = self._web_api.execute_phase1_result(
  File "/omd/sites/heute/lib/python3/cmk/cee/dcd/web_api.py", line 303, in execute_phase1_result
    return result.json()["extensions"]
KeyError: 'extensions'

With this Werk, the message Failed to contact remote site will be shown instead. The remaining phases were working as expected.

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