[Bug 1828617] Please test proposed package

[James Page]

Hello Andrey, or anyone else affected,

Accepted ceph into queens-proposed. The package will build now and be
available in the Ubuntu Cloud Archive in a few hours, and then in the
-proposed repository.

Please help us by testing this new package. To enable the -proposed
repository:

  sudo add-apt-repository cloud-archive:queens-proposed
  sudo apt-get update

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-queens-needed to verification-queens-done. If it does
not fix the bug for you, please add a comment stating that, and change
the tag to verification-queens-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: cloud-archive/queens
       Status: In Progress => Fix Committed

** Tags added: verification-queens-needed

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https://bugs.launchpad.net/bugs/1828617

Title:
  Hosts randomly 'losing' disks, breaking ceph-osd service enumeration

Status in Ubuntu Cloud Archive:
  Fix Committed
Status in Ubuntu Cloud Archive queens series:
  Fix Committed
Status in Ubuntu Cloud Archive rocky series:
  Fix Committed
Status in Ubuntu Cloud Archive stein series:
  Fix Committed
Status in Ubuntu Cloud Archive train series:
  In Progress
Status in ceph package in Ubuntu:
  Fix Released
Status in ceph source package in Bionic:
  Fix Released
Status in ceph source package in Disco:
  Fix Released
Status in ceph source package in Eoan:
  Fix Released

Bug description:
  [Impact]
  For deployments where the bluestore DB and WAL devices are on separate underlying OSD's, its possible on reboot that the LV's configured on these devices have not yet been scanned and detected; the OSD boot process ignores this fact and tries to boot the OSD anyway as soon as the primary LV supporting the OSD is detected, resulting in the OSD crashing as required block device symlinks are not present.

  [Test Case]
  Deploy ceph with bluestore + separate DB and WAL devices.
  Reboot servers
  OSD devices will fail to start after reboot (its a race so not always).

  [Regression Potential]
  Low - the fix has been landed upstream and simple ensures that if a separate LV is expected for the DB and WAL devices for an OSD, the OSD will not try to boot until they are present.

  [Original Bug Report]
  Ubuntu 18.04.2 Ceph deployment.

  Ceph OSD devices utilizing LVM volumes pointing to udev-based physical devices.
  LVM module is supposed to create PVs from devices using the links in /dev/disk/by-dname/ folder that are created by udev.
  However on reboot it happens (not always, rather like race condition) that Ceph services cannot start, and pvdisplay doesn't show any volumes created. The folder /dev/disk/by-dname/ however has all necessary device created by the end of boot process.

  The behaviour can be fixed manually by running "#/sbin/lvm pvscan
  --cache --activate ay /dev/nvme0n1" command for re-activating the LVM
  components and then the services can be started.

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