[Bug 1493931] Related fix proposed to charm-cinder (master)

[OpenStack Infra]

Related fix proposed to branch: master
Review: https://review.openstack.org/290066

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https://bugs.launchpad.net/bugs/1493931

Title:
  cinder.conf 'host' not set when using cinder-ceph subordinate

Status in cinder package in Juju Charms Collection:
  Fix Released
Status in cinder-ceph package in Juju Charms Collection:
  Fix Released

Bug description:
  If I deploy 3 nodes of cinder, relate them with cinder-ceph then
  relate cinder-ceph with ceph everything works fine and dandy except
  that my cinder.conf looks like - http://paste.ubuntu.com/12321902/

  The problem being that 'hosts' is not set so it will get a default
  value (unit hostname) e.g. http://paste.ubuntu.com/12321914/

  The consequence of this is that if a volume create goes to cinder/0
  and that node subsequently dies, i will not be able to perform actions
  e.g. delete on that volume anymore until cinder/0 comes back up.

  The simple fix is obviously to have cinder set host properly when rbd
  backends (and only stateless backends) are related but it will require
  existing volumes to be updated by modifying the 'host' field in each
  Volume record in the Cinder database to match the cinder service name

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