silversurfer972 at gmail
Jul 12, 2012, 9:01 AM
Post #1 of 1
(79 views)
Permalink
|
|
[nova] Live Migration + Ephemeral disk impossible with qcow2 format
|
|
Hi all,
I noticed a bug in Multiple OpenStack Clusters that prevent instances with
ephemeral disk to be migrated when qcow2 format is used.
The bug has need fixed here
<https://bugs.launchpad.net/nova/+bug/977007>but the fix has been
committed to the head branch for Folsom.
https://github.com/openstack/nova/commit/ee705d048418d63667136cad3951655178861d46
Live migration is a very important feature to production clouds as it
allows maintenance with 0 downtime. Even is ephemeral disk is not a best
practice, the fact that it is included in defaults profile make it more
relevant as soon-to-be-fixed bug.
I would like to know if it is planned to have the bug fixed also on Essex
branch.
Then a bug fix upgrade in ubuntu 12.04 OpenStack repository would be the
best outcome.
I would be unfortunate to have this bug on Essex with users forced to patch
between each package upgrade.
To manually fix the bug:
vim +2168 /usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py
Change
size=info['disk_size'])
With
size=info['virt_disk_size'])
Testing works fine while migration is impossible on
version 2012.1+stable~20120612-3ee026e-0ubuntu1.2 on ubuntu 12.04
Short version:
This bug prevent live migration with ephemeral images with qcow2 images and
needs to be ported to essex asap.
Cheers,
*BUSSY Jean-Daniel*
Computer Engineer | CyberAgent
Mobile: +81 090-3317-1337
Email: silversurfer972 [at] gmail
|
connection.py.patch
