CONF.libvirt.snapshot_image_format does not always default to format of source image

Bug #1793351 reported by David Rabel on 2018-09-19
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
OpenStack Compute (nova)
Undecided
David Rabel

Bug Description

It seems to be intended, that CONF.libvirt.snapshot_image_format defaults to the format of the source image.
That is also what the docs say. See for example https://docs.openstack.org/nova/latest/configuration/sample-config.html

If the format of the source image is raw, the raw image is only used as a backing file with a qcow2 overlay. So find_disk() from nova's libvirt utils will return the overlay file and qcow2 as a format.

What we want to use here is the format of the backing file.

Fix proposed to branch: master
Review: https://review.openstack.org/603855

Changed in nova:
assignee: nobody → David Rabel (rabel-b1)
status: New → In Progress

Change abandoned by David Rabel (<email address hidden>) on branch: master
Review: https://review.openstack.org/603855

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