Mohammed, It looks like you may be right. Just found the permissions issue in the nova log on the compute node.
4-e8f52e4fbcfb 691caf1c10354efab3e3c8ed61b7d89a 49bc5e5bf2684bd0948d9f94c7875027 - - -] Performing standard snapshot because direct snapshot failed: no write permission on storage pool images I'm going to test the change and will send an update you all with the results. Thank You, ___ John Petrini >> > Yes, we are also running Mitaka and I also read Sebastien Han's blogs ;-) > > our snapshots are not happening at the RBD level, >> they are being copied and uploaded to glance which takes up a lot of space >> and is very slow. >> > > Unfortunately, that's what we are experiencing, too. I don't know if > there's something I missed in the nova configs or somewhere else, but I'm > relieved that I'm not the only one :-) > > While writing this email I searched again and found something: > > https://specs.openstack.org/openstack/nova-specs/specs/mitak > a/implemented/rbd-instance-snapshots.html > > https://review.openstack.org/#/c/205282/ > > It seems to be implemented already, I'm looking for the config options to > set. If you manage to get nova to make rbd snapshots, please let me know ;-) > > Regards, > Eugen > > > > Zitat von John Petrini <jpetr...@coredial.com>: > > Hi Eugen, >> >> Thanks for the response! That makes a lost of sense and is what I figured >> was going on but I missed it in the documentation. We use Ceph as well and >> I had considered doing the snapshots at the RBD level but I was hoping >> there was someway to accomplish this via nova. I came across this >> Sebastien >> Han write-up that claims this functionality was added to Mitaka: >> http://www.sebastien-han.fr/blog/2015/10/05/openstack-nova- >> snapshots-on-ceph-rbd/ >> >> We are running Mitaka but our snapshots are not happening at the RBD >> level, >> they are being copied and uploaded to glance which takes up a lot of space >> and is very slow. >> >> Have you or anyone else implemented this in Mitaka? Other than Sebastian's >> blog I haven't found any documentation on this. >> >> Thank You, >> >> ___ >> >> John Petrini >> >> On Wed, Jan 11, 2017 at 3:32 AM, Eugen Block <ebl...@nde.ag> wrote: >> >> Hi, >>> >>> this seems to be exptected, the docs say: >>> >>> "Shut down the source VM before you take the snapshot to ensure that all >>> data is flushed to disk." >>> >>> So if the VM is not shut down, it's freezed to prevent data loss (I >>> guess). Depending on your storage backend, there are other ways to >>> perform >>> backups of your VMs. >>> We use Ceph as backend for nova, glance and cinder. Ceph stores the >>> disks, >>> images and volumes as Rados block device objects. We have a backup script >>> that creates snapshots of these RBDs, which are exported to our backup >>> drive. This way the running VM is not stopped or freezed, the user >>> doesn't >>> notice any issues. Unlike a nova snapshot, the rbd snapshot is created >>> immediately within a few seconds. After a successful backup the snapshots >>> are removed. >>> >>> Hope this helps! If you are interested in Ceph, visit [1]. >>> >>> Regards, >>> Eugen >>> >>> [1] http://docs.ceph.com/docs/giant/start/intro/ >>> >>> >>> Zitat von John Petrini <jpetr...@coredial.com>: >>> >>> >>> Hello, >>> >>>> >>>> I've just started experimenting with nova backup and discovered that >>>> there >>>> is a period of time during the snapshot where the instance becomes >>>> unreachable. Is this behavior expected during a live snapshot? Is there >>>> any >>>> way to prevent this? >>>> >>>> ___ >>>> >>>> John Petrini >>>> >>>> >>> >>> >>> -- >>> Eugen Block voice : +49-40-559 51 75 >>> NDE Netzdesign und -entwicklung AG fax : +49-40-559 51 77 >>> Postfach 61 03 15 >>> D-22423 Hamburg e-mail : ebl...@nde.ag >>> >>> Vorsitzende des Aufsichtsrates: Angelika Mozdzen >>> Sitz und Registergericht: Hamburg, HRB 90934 >>> Vorstand: Jens-U. Mozdzen >>> USt-IdNr. DE 814 013 983 >>> >>> >>> _______________________________________________ >>> Mailing list: http://lists.openstack.org/cgi >>> -bin/mailman/listinfo/openstac >>> k >>> Post to : openstack@lists.openstack.org >>> Unsubscribe : http://lists.openstack.org/cgi >>> -bin/mailman/listinfo/openstac >>> k >>> >>> > > > -- > Eugen Block voice : +49-40-559 51 75 > NDE Netzdesign und -entwicklung AG fax : +49-40-559 51 77 > Postfach 61 03 15 > D-22423 Hamburg e-mail : ebl...@nde.ag > > Vorsitzende des Aufsichtsrates: Angelika Mozdzen > Sitz und Registergericht: Hamburg, HRB 90934 > Vorstand: Jens-U. Mozdzen > USt-IdNr. DE 814 013 983 > >
_______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
