Reviewed: https://review.openstack.org/288640
Committed:
https://git.openstack.org/cgit/openstack/nova/commit/?id=db7fd539f261ea53f6c005478049424b9dae1543
Submitter: Jenkins
Branch: master
commit db7fd539f261ea53f6c005478049424b9dae1543
Author: Matthew Booth <mbo...@redhat.com>
Date: Fri Mar 4 18:34:21 2016 +0000
libvirt: Fix resize of instance with deleted glance image
finish_migration() in the libvirt driver was attempting to resize an
image before checking that its backing file was present. This patch
re-orders these 2 operations. In doing so, we also have to resolve an
overloading of the 'disk_info' variable.
Closes-Bug: #1546778
Change-Id: I03e08fae97416ebe5cdedcf238a06d1b90203c5d
** Changed in: nova
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1546778
Title:
libvirt: resize with deleted backing image fails
Status in OpenStack Compute (nova):
Fix Released
Status in OpenStack Compute (nova) liberty series:
New
Bug description:
Once the glance image from which an instance was spawned is deleted,
resizes of that image fail if they would take place across more than
one compute node. Migration and live block migration both succeed.
Resize fails, I believe, because 'qemu-img resize' is called
(https://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L7218-L7221)
before the backing image has been transferred from the source compute
node
(https://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L7230-L7233).
Replication requires two compute nodes. To replicate:
1. Boot an instance from an image or snapshot.
2. Delete the image from Glance.
3. Resize the instance. It will fail with an error similar to:
Stderr: u"qemu-img: Could not open '/var/lib/nova/instances/f77f1c5c-
71f7-4645-afa1-dd30bacef874/disk': Could not open backing file: Could
not open
'/var/lib/nova/instances/_base/ca94b18d94077894f4ccbaafb1881a90225f1224':
No such file or directory\n"
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