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

[Chris Glass]

** Branch unlinked: lp:~tribaal/ubuntu/trusty/ceph/ceph-zap-in-two-
phases

** Branch linked: lp:~tribaal/ubuntu/trusty/ceph/add-zap-fix-patch

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

Bug description:
  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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