[Bug 2085616] Re: ceph 'failed to probe daemons or devices' due to apparmor

[Tom Yan]

Well, probably because your node(s) use docker (instead of podman)...

Not sure if there are better ways than disabling apparmor completely or
switching to podman...(until maybe ceph supports docker with apparmor
properly: https://docs.docker.com/engine/security/apparmor/ ?)

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Title:
  ceph 'failed to probe daemons or devices' due to apparmor

Status in ceph package in Ubuntu:
  New

Bug description:
  Upgraded one of my hosts from 22.04 to 24.04. Now I get a warning
  "failed to probe daemons or devices".

  I've reported this issue on the ceph users mailing list, but it seems
  Ubuntu-specific.

  ceph health detail gives me:
  HEALTH_WARN failed to probe daemons or devices
  [WRN] CEPHADM_REFRESH_FAILED: failed to probe daemons or devices
      host hvs004 `cephadm gather-facts` failed: cephadm exited with an error code: 1, stderr: Traceback (most recent call last):
    File "<frozen runpy>", line 198, in _run_module_as_main
    File "<frozen runpy>", line 88, in _run_code
    File "/var/lib/ceph/dd4b0610-b4d2-11ec-bb58-d1b32ae31585/cephadm.a58127a8eed242cae13849ddbebcb9931d7a5410f406f2d264e3b1ed31d9605e/__main__.py", line 5579, in <module>
    File "/var/lib/ceph/dd4b0610-b4d2-11ec-bb58-d1b32ae31585/cephadm.a58127a8eed242cae13849ddbebcb9931d7a5410f406f2d264e3b1ed31d9605e/__main__.py", line 5567, in main
    File "/var/lib/ceph/dd4b0610-b4d2-11ec-bb58-d1b32ae31585/cephadm.a58127a8eed242cae13849ddbebcb9931d7a5410f406f2d264e3b1ed31d9605e/__main__.py", line 4639, in command_gather_facts
    File "/var/lib/ceph/dd4b0610-b4d2-11ec-bb58-d1b32ae31585/cephadm.a58127a8eed242cae13849ddbebcb9931d7a5410f406f2d264e3b1ed31d9605e/cephadmlib/host_facts.py", line 835, in dump
    File "/var/lib/ceph/dd4b0610-b4d2-11ec-bb58-d1b32ae31585/cephadm.a58127a8eed242cae13849ddbebcb9931d7a5410f406f2d264e3b1ed31d9605e/cephadmlib/host_facts.py", line 743, in kernel_security
    File "/var/lib/ceph/dd4b0610-b4d2-11ec-bb58-d1b32ae31585/cephadm.a58127a8eed242cae13849ddbebcb9931d7a5410f406f2d264e3b1ed31d9605e/cephadmlib/host_facts.py", line 722, in _fetch_apparmor
  ValueError: too many values to unpack (expected 2)

  The only workarond seems to disable Apparmor and reboot the host.

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