Werk #15656: Agent TLS registration: Fix '500 Internal Server Error' during register and status

Component	Agent bakery
Title	Agent TLS registration: Fix '500 Internal Server Error' during register and status
Date	Apr 12, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.3.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0b4 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p26 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

When registering new agents (cmk-agent-ctl register) or querying the status of registered agents (cmk-agent-ctl status), users might have encountered the error

Error: Request failed with code 500 Internal Server Error: Internal Server Error (!!)

This happened if the path /opt/tmp existed on the monitoring server and the corresponding site user did not have read permissions for this path. If this happened, the log file var/log/agent-receiver/error.log contained errors such as

[ERROR] Exception in ASGI application
Traceback (most recent call last):
  ...
PermissionError: [Errno 13] Permission denied: '../../../tmp/check_mk/data_source_cache/push-agent/my-host'

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