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[Launchpad Bug Tracker <1774032@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package collectd - 5.7.2-2ubuntu1.1

---------------
collectd (5.7.2-2ubuntu1.1) bionic; urgency=medium

  * d/p/add-support-for-ceph-version-luminous.patch (LP: #1774032)
    - This patch is not backward compatible with previous ceph versions.

  * d/p/ceph-plugin-Fix-2572.patch:
    - ceph plugin causes collectd to segfault.

 -- Eric Desrochers <eric.desrochers@xxxxxxxxxxxxx>  Tue, 26 Mar 2019
12:18:41 -0400

** Changed in: collectd (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1774032

Title:
  Bionic: CollectD ceph plugin is incompatible with Ceph 12+ (Luminous)

Status in collectd package in Ubuntu:
  Fix Released
Status in collectd source package in Xenial:
  Won't Fix
Status in collectd source package in Bionic:
  Fix Released

Bug description:
  [IMPACT]
  A subset of Ceph metrics no-longer get logged with Ceph luminous (v12 and late)

  The version of collectd shipped with Ubuntu 18.04 (Bionic) provides a
  ceph plugin that is incompatible with the version of Ceph shipped in
  the same distribution.

  The version of collectd is 5.7.2-2ubuntu1
  The version of ceph is 12.2.4-0ubuntu1.1

  This patch for collectd is required for correct interoperation with
  Ceph 12+:

   https://github.com/collectd/collectd/pull/2464

  The first version of collectd to contain this patch is 5.8.0.

  Without this patch, errors of the following form will be logged by
  collectd, and many ceph-specific metrics will not be collected:

  May 28 09:31:56 stor-a collectd[2141]: ceph plugin: cconn_handle_event(name=osd.2,i=0,st=4): error 1
  May 28 09:31:56 stor-a collectd[2141]: ceph plugin: ds Bluestore.kvFlushLat.avgtime was not properly initialized.
  May 28 09:31:56 stor-a collectd[2141]: ceph plugin: JSON handler failed with status -1.

  [TEST CASE]

  * Install Bionic and have a Luminous and/or late Ceph environment.

  * Install collectd
    ** Enable Ceph plugin in /etc/collectd/collectd.conf
    ** Configure Ceph plugin daemon in /etc/collectd/collectd.conf

  * Restart collectd
    ** systemctl stop collectd.service
    ** systemctl start collectd.service

  * Force collection
    ** collectd -C /etc/collectd/collectd.conf

  * Monitor /var/log/syslog
    ** tail -f /var/log/syslog | grep -i collectd
    ** tail -f /var/log/syslog | grep -i "ceph plugin"

  * Check Ceph plugin metrics from visualisation system.

  [POTENTIAL REGRESSION]

   * Bionic's oldest Ceph version supported is Luminous, so the backward
  incompatibility with previous ceph versions is not a problem here.

   * Upstream faced a segfault situation in the Ceph plugin with Mimic
  version via issue: https://github.com/collectd/collectd/issues/2572,
  this problem is also addressed in the current SRU (d/p/ceph-plugin-
  Fix-2572.patch)

   * The new Ceph support is already part of debian and Ubuntu Cosmic
  and Disco.

   * Right now it seems like the Ceph plugin is not working at all
  anyway. It couldn't go worse after this SRU than the current
  situation.

   * A test package with the fixes has been made available PRE-SRU to
  impacted user(s) and the feedback were positive and this was tested
  against different Ceph daemons (MDS, MON, OSD) (See comment #5, #15,
  #18)

  [OTHER INFORMATION]

  # Collectd Plugin:Ceph information:
  https://collectd.org/wiki/index.php/Plugin:Ceph

  # Upstream commits:
  647ac31b Add support for ceph version luminous:
  https://github.com/collectd/collectd/commit/647ac31bf9db60b1685d6d8d25be65375ba85891

  de05fb53 ceph plugin: Fix #2572:
  https://github.com/collectd/collectd/commit/de05fb53fad6bc998f585b704ca0caeadc14a035

  $ git describe --contains 647ac31b
  collectd-5.8.0~29^2~9

  $ git describe --contains de05fb53
  collectd-5.8.1~38

  # rmadison
  ==> collectd | 5.7.2-2ubuntu1    | bionic/universe
   collectd | 5.8.0-5.2         | cosmic/universe
   collectd | 5.8.1-1.2         | disco/universe

  [ORIGINAL DESCRIPTION]

  The version of collectd shipped with Ubuntu 18.04 (Bionic) provides a
  ceph plugin that is incompatible with the version of Ceph shipped in
  the same distribution.

  The version of collectd is 5.7.2-2ubuntu1
  The version of ceph is 12.2.4-0ubuntu1.1

  This patch for collectd is required for correct interoperation with
  Ceph 12+:

   https://github.com/collectd/collectd/pull/2464

  The first version of collectd to contain this patch is 5.8.0.

  Without this patch, errors of the following form will be logged by
  collectd, and many ceph-specific metrics will not be collected:

  May 28 09:31:56 stor-a collectd[2141]: ceph plugin: cconn_handle_event(name=osd.2,i=0,st=4): error 1
  May 28 09:31:56 stor-a collectd[2141]: ceph plugin: ds Bluestore.kvFlushLat.avgtime was not properly initialized.
  May 28 09:31:56 stor-a collectd[2141]: ceph plugin: JSON handler failed with status -1.

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