Cinder volumes fail to attach to instance with Ceph 2 backend

Solution Verified - Updated -


  • Attaching cinder volumes to any nova instance would fail. The volume will state an 'attaching' message but will not attach. An error message is only displayed if a "Device Name" is given, with the error "Unable to Connect".

  • Cinder logs show that the volumes appear to be disconnecting instantly

2016-10-06 10:36:04.931 80701 INFO cinder.volume.manager [req-<uuid >- - -] Initialize volume connection completed successfully.
2016-10-06 10:36:05.058 80701 INFO cinder.volume.manager [req-<uuid> - - -] Terminate volume connection completed successfully.


  • Red Hat OpenStack Platform 8
  • Red Hat Ceph Storage 2

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