[Bug 2152308] [NEW] Ceph 20.2.0 - prometheus module crashes

[Alan Baghumian]

Public bug reported:

After installing a Ceph Tentacle cluster on Ubuntu 26.04 LTS using ceph-
by-ansible (1).

The prometheus module fails to load. Enabling or Disabling it has no
effect:

  cluster:
    id:     877c8bf1-32af-4716-a798-2a8aeca852ef
    health: HEALTH_ERR
            Module 'prometheus' has failed: not all arguments converted during string formatting
            121 mgr modules have recently crashed
 
  services:
    mon: 3 daemons, quorum ceph-mon-3,ceph-mon-1,ceph-mon-2 (age 16h) [leader: ceph-mon-3]
    mgr: ceph-mon-1(active, starting, since 3s), standbys: ceph-mon-3, ceph-mon-2
    mds: 1/1 daemons up, 2 standby
    osd: 6 osds: 6 up (since 16h), 6 in (since 16h)
    rgw: 1 daemon active (1 hosts, 1 zones)
 
  data:
    volumes: 1/1 healthy
    pools:   7 pools, 169 pgs
    objects: 281 objects, 589 KiB
    usage:   416 MiB used, 600 GiB / 600 GiB avail
    pgs:     169 active+clean


I found a related issue on rook (2), showing the actual fix has been merged upstream (3) and is a part of the 20.2.1 release.

An SRU of the 20.2.1 release should fix this.

Thanks,
Alan

(1) https://github.com/alanbach/ceph-by-ansible
(2) https://github.com/rook/rook/issues/16887
(3) https://github.com/ceph/ceph/pull/65906

** Affects: ceph (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2152308

Title:
  Ceph 20.2.0 - prometheus module crashes

Status in ceph package in Ubuntu:
  New

Bug description:
  After installing a Ceph Tentacle cluster on Ubuntu 26.04 LTS using
  ceph-by-ansible (1).

  The prometheus module fails to load. Enabling or Disabling it has no
  effect:

    cluster:
      id:     877c8bf1-32af-4716-a798-2a8aeca852ef
      health: HEALTH_ERR
              Module 'prometheus' has failed: not all arguments converted during string formatting
              121 mgr modules have recently crashed
   
    services:
      mon: 3 daemons, quorum ceph-mon-3,ceph-mon-1,ceph-mon-2 (age 16h) [leader: ceph-mon-3]
      mgr: ceph-mon-1(active, starting, since 3s), standbys: ceph-mon-3, ceph-mon-2
      mds: 1/1 daemons up, 2 standby
      osd: 6 osds: 6 up (since 16h), 6 in (since 16h)
      rgw: 1 daemon active (1 hosts, 1 zones)
   
    data:
      volumes: 1/1 healthy
      pools:   7 pools, 169 pgs
      objects: 281 objects, 589 KiB
      usage:   416 MiB used, 600 GiB / 600 GiB avail
      pgs:     169 active+clean

  
  I found a related issue on rook (2), showing the actual fix has been merged upstream (3) and is a part of the 20.2.1 release.

  An SRU of the 20.2.1 release should fix this.

  Thanks,
  Alan

  (1) https://github.com/alanbach/ceph-by-ansible
  (2) https://github.com/rook/rook/issues/16887
  (3) https://github.com/ceph/ceph/pull/65906

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