Create snapshot from volume and image-download results in size 0 in Red Hat OpenStack Platform
Issue
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Create snapshot from volume and image-download results in size 0 in Red Hat OpenStack Platform following this doc to migrate OpenStack instance: https://github.com/openstack/openstack-manuals/blob/stable/newton/doc/user-guide/source/cli-use-snapshots-to-migrate-instances.rst.
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Following the above procedure, snapshots are empty
For example:
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Shutdown instance
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Create snapshot
[stack@undercloud tmp]$ nova image-create --poll instance instance-backup
Server snapshotting... 100% complete
Finished
- Download the snapshot
[stack@undercloud tmp]$ glance image-download --file /tmp/instance.qcow2 <UUID>
- check the download image size
[stack@undercloud tmp]$ ls -la /tmp/instance.qcow2
-rw-rw-r--. 1 stack stack 0 Jan 15 21:05 /tmp/instance.qcow2
Environment
Red Hat Enteprise Linux OpenStack Platform 7
Red Hat OpenStack Platform 8
Red Hat OpenStack Platform 9
Red Hat OpenStack Platform 10
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