On 09/12/2013 11:33 AM, Darren Birkett wrote:
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
That's obsolete for Grizzly. True live migration works fine with an rbd-backed instance. I haven't checked Havana yet, particularly with libvirt_image_type using rbd. If anyone's interested in checking out the new libvirt_image_type option, now is a good time to catch any bugs before Havana is released. Josh
Thanks Darren On 12 September 2013 17:01, Maciej Gałkiewicz <macias@xxxxxxxxxxxxxxx <mailto:macias@xxxxxxxxxxxxxxx>> wrote: On 12 September 2013 15:15, Darren Birkett <darren.birkett@xxxxxxxxx <mailto:darren.birkett@xxxxxxxxx>> 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/, macias@xxxxxxxxxxxxxxx <mailto:macias@xxxxxxxxxxxxxxx> KRS: 0000440358 REGON: 101504426
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