Hi Maciej,

That's interesting.  The following also seems to suggest that nova has
those shared storage dependencies for live migration that I spoke about:

http://tracker.ceph.com/issues/5938

Thanks
Darren


On 12 September 2013 17:01, Maciej Gałkiewicz <mac...@shellycloud.com>wrote:

> On 12 September 2013 15:15, Darren Birkett <darren.birk...@gmail.com>
> wrote:
> > Hi Maciej,
> >
> > I'm using Grizzly, but the live migration doesn't appear to be changed
> even
> > in trunk.  It seems to check if you are using shared storage by writing a
> > test file on the destination host (in /var/lib/nova/instances) and then
> > trying to read it on the source host, and will fail if this test does not
> > succeed.  Given that we do not use a shared filesystem as such when using
> > RBD backed instances, I don't understand how this can succeed:
> >
> >
> https://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L3726-L3761
>
> Apparently the code is not used in case of rbd. I didnt notice any
> issues caused by this method.
>
> > Seems like I might be missing something and am probably reading the code
> > wrong, as it sounds like you have it working.  Are there any particular
> > settings you had to add to nova to make it work?
>
> Nova does not require any changes. Only cinder.
>
> regards
> --
> Maciej Gałkiewicz
> Shelly Cloud Sp. z o. o., Sysadmin
> http://shellycloud.com/, mac...@shellycloud.com
> KRS: 0000440358 REGON: 101504426
>
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