nova/releasenotes/notes/rbd-increase-timeout-c4e5a3...

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---
features:
- |
Added params ``[libvirt]/rbd_destroy_volume_retries``, defaulting to 12,
and ``[libvirt]/rbd_destroy_volume_retry_interval``, defaulting to 5, that
Nova will use when trying to remove a volume from Ceph in a retry loop
that combines these parameters together. Thus, maximum elapsing time is by
default 60 seconds.
fixes:
- |
Nova tries to remove a volume from Ceph in a retry loop of 10 attempts at
1 second intervals, totaling 10 seconds overall - which, due to 30 second
ceph watcher timeout, might result in intermittent object removal failures
on Ceph side (`bug 1856845`_). Setting default values for
``[libvirt]/rbd_destroy_volume_retries`` to 12 and
``[libvirt]/rbd_destroy_volume_retry_interval`` to 5, now gives Ceph
reasonable amount of time to complete the operation successfully.
.. _`bug 1856845`: https://bugs.launchpad.net/nova/+bug/1856845