[Bug 1876325] Re: ceph-mgr-dashboard: missing dependency on python3-yaml

[Launchpad Bug Tracker]

** Merge proposal linked:
   https://code.launchpad.net/~chris.macnaughton/ubuntu/+source/ceph/+git/ceph/+merge/383332

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https://bugs.launchpad.net/bugs/1876325

Title:
  ceph-mgr-dashboard: missing dependency on python3-yaml

Status in ceph package in Ubuntu:
  New

Bug description:
  As reported on ceph-users:

  Duncan Bellamy XXXXX via ceph.io

  Hi,
  I have installed ceph on Ubuntu Focal Fossa using the ubuntu repo, instead of ceph-deploy (as ceph-deploy install does not work for Focal Fossa yet)  install I used:
  sudo apt-get install -y ceph ceph-mds radosgw ceph-mgr-dashboard

  The rest of the setup was the same as the quickstart on ceph.io
  <http://ceph.io/> with ceph-deploy.

  It installed ceph version 15.2.1 (octopus).

  If I do a 'ceph -s' I get the warning:
  health: HEALTH_WARN
              2 mgr modules have failed dependencies

  If I run 'ceph mgr module ls', for enabled and active modules I get:

   "always_on_modules": [
          "balancer",
          "crash",
          "devicehealth",
          "orchestrator",
          "osd_support",
          "pg_autoscaler",
          "progress",
          "rbd_support",
          "status",
          "telemetry",
          "volumes"
      ],
      "enabled_modules": [
          "iostat",
          "restful”

  Then when I run 'ceph mgr module enable dashboard’ I get the error:

  Error ENOENT: module 'dashboard' reports that it cannot run on the
  active manager daemon: No module named 'yaml' (pass --force to force
  enablement)

  I have tried searching, and searching with apt but cannot find any
  ‘yaml’ package that might be used by ceph.

  Duncan

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