commit 0cfe9c81e3fe4d268c9949c6b8e873abab94a407
Author: Lee Yarwood <email address hidden>
Date: Wed Feb 19 20:39:54 2020 +0000
libvirt: Provide the backing file format when creating qcow2 disks
Libvirt v6.0.0 [1] will now fail to launch a domain when using qcow2
disks where the backing file format is not recorded in the qcow2
metadata.
There are some discussions upstream around relaxing this slightly [2]
but for now any attempt to launch an instance using qcow2 disks will
fail as Nova does not populate this value when creating the disk.
Nova needs to at a minimum start populating this field and depending on
the outcome of the thread upstream in Libvirt also potentially handle
the upgrade case where we may need to rebase existing disks in order to
update the metadata.
For now this change simply adds the backing_fmt option to the qemu-img
command line used to create these disks.
Reviewed: https:/ /review. opendev. org/708745 /git.openstack. org/cgit/ openstack/ nova/commit/ ?id=0cfe9c81e3f e4d268c9949c6b8 e873abab94a407
Committed: https:/
Submitter: Zuul
Branch: master
commit 0cfe9c81e3fe4d2 68c9949c6b8e873 abab94a407
Author: Lee Yarwood <email address hidden>
Date: Wed Feb 19 20:39:54 2020 +0000
libvirt: Provide the backing file format when creating qcow2 disks
Libvirt v6.0.0 [1] will now fail to launch a domain when using qcow2
disks where the backing file format is not recorded in the qcow2
metadata.
There are some discussions upstream around relaxing this slightly [2]
but for now any attempt to launch an instance using qcow2 disks will
fail as Nova does not populate this value when creating the disk.
Nova needs to at a minimum start populating this field and depending on
the outcome of the thread upstream in Libvirt also potentially handle
the upgrade case where we may need to rebase existing disks in order to
update the metadata.
For now this change simply adds the backing_fmt option to the qemu-img
command line used to create these disks.
[1] https:/ /github. com/libvirt/ libvirt/ commit/ 3615e8b39badf2a 526996a69dc91a9 2b04cf262e /www.redhat. com/archives/ libvir- list/2020- February/ msg00616. html
[2] https:/
Partial-Bug: #1864020 2a300be4fa043fb 8676458402b
Change-Id: I77ebada015f652