[Bug 1475247] Re: ceph-disk-prepare --zap-disk hang

[Chris J Arges]

Hello Adam, or anyone else affected,

Accepted ceph into trusty-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/ceph/0.80.10-0ubuntu1.14.04.3 in a
few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: ceph (Ubuntu Trusty)
       Status: Fix Released => Fix Committed

** Changed in: ceph (Ubuntu Vivid)
       Status: Fix Released => Fix Committed

** Tags removed: verification-done

** Tags added: verification-needed

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https://bugs.launchpad.net/bugs/1475247

Title:
  ceph-disk-prepare --zap-disk hang

Status in ceph package in Ubuntu:
  Fix Released
Status in ceph source package in Trusty:
  Fix Committed
Status in ceph source package in Utopic:
  Won't Fix
Status in ceph source package in Vivid:
  Fix Committed
Status in ceph source package in Wily:
  Fix Released
Status in ceph package in Juju Charms Collection:
  Fix Released
Status in ceph-osd package in Juju Charms Collection:
  Fix Released

Bug description:
  [Impact]
  Disks with invalid metadata can cause hangs during cleaning; resulting in stuck deployments.

  [Test Case]
  Initialize a disk with invalid metadata using the '--zap-disk' option.

  [Regression Potential]
  Minimal; already in later Ubuntu releases.

  [Original Bug Report]
  During an Autopilot deployment on gMAAS, Juju had hung running a mon-relation-changed hook

  $ ps afxwww | grep -A 4 [m]on-relation-changed
    29118 ?        S      0:03  \_ /usr/bin/python /var/lib/juju/agents/unit-ceph-1/charm/hooks/mon-relation-changed
    37996 ?        S      0:00      \_ /bin/sh /usr/sbin/ceph-disk-prepare --fs-type xfs --zap-disk /dev/sdb
    37998 ?        S      0:00          \_ /usr/bin/python /usr/sbin/ceph-disk prepare --fs-type xfs --zap-disk /dev/sdb
    38016 ?        D      0:00              \_ /sbin/sgdisk --zap-all --clear --mbrtogpt -- /dev/sdb

  This had been in this state for > 10m. The logs[1] from the unit in
  question showed that something was up with the partition tables on
  that disk.

  I fixed this by hand using gdisk[2]

  [1] https://pastebin.canonical.com/135426/
  [2] http://paste.ubuntu.com/11887096/

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