[Openstack-operators] /var/lib/nova/instances fs filled up corrupting my Linux instances

Joe Topjian joe.topjian at cybera.ca
Wed Mar 13 21:45:26 UTC 2013


On Wed, Mar 13, 2013 at 4:42 PM, Michael Still <mikal at stillhq.com> wrote:

> On Wed, Mar 13, 2013 at 3:58 PM, Lorin Hochstein
> <lorin at nimbisservices.com> wrote:
> > Michael:
> >
> > Is this related to the remove_unused_base_images flag?
> >
> > cf
> > https://review.openstack.org/#/c/22040/
> > https://bugs.launchpad.net/nova/+bug/1126375
> >
> > If so, I think this is a strong argument for changing the default.
>
> Yes, this is the flag we're talking about. However, the bug was fixed
> when it was reported by Nectar quite some time ago for grizzly.
> Unfortunately, this operator ran his own shell script, which behaved
> poorly with shared storage. This I suspect is because there is a lot
> of advice out on the web which dates back to essex, where this problem
> was handled manually.
>
> The fix is in commit c2de33a0a2132774dc295861cef138ec24bb0cf9 for
> grizzly, which was not back ported to folsom (see
> https://review.openstack.org/#/c/16726/ for details). However, the
> image cache manager is now off by default in folsom (its interval is
> set to zero, which means don't run).
>
> My comments from the code review you link to still hold -- there is
> more danger in an unbounded disk cache then there is in shared NFS
> storage, especially now that we've realised that edge condition exists
> and handled it. Please note that this bug is only present for users
> using shared NFS storage for instances, which doesn't seem to be
> particularly common.
>

So using live migration isn't common?


>
> Michael
>
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>



-- 
Joe Topjian
Systems Administrator
Cybera Inc.

www.cybera.ca

Cybera is a not-for-profit organization that works to spur and support
innovation, for the economic benefit of Alberta, through the use
of cyberinfrastructure.
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