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Eric, Well, in case where several servers may start the same virtual machines after a reboot for exemple. http://lists.ceph.com/pipermail/ceph-users-ceph.com/2013-August/003887.html I've seen this hook here : http://www.wogri.at/en/linux/ceph-libvirt-locking/ But it's a hook... Yes, I may try to write a patch. My coding skills are surely not as good as yours but I 'd be glad to make a try :) -----Message d'origine----- De : Eric Blake [mailto:eblake@re...

...see the following links. The libvirt hook looks good, but is there any expectation that this arrangement will become a patch to libvirt itself, as is suggested by the second link?* http://www.wogri.at/en/linux/ceph-libvirt-locking/ http://lists.ceph.com/pipermail/ceph-users-ceph.com/2013-August/003887.html Can anyone guide me on how to theoretically build a very "lock" safe 5-node active-active KVM cluster atop Ceph RBD? Must I use sanlock with its NFS or GFS2 with its performance bottlenecks? Does your answer work for LXC (sans the current state of live migration)? Thanks, Joshua...

Hi, One short question : Is there any chance to see locks on rbd/images in the next release ? Thank you :)

On 11/07/2013 09:04 AM, NEVEU Stephane wrote: > Eric, [please don't top-post on technical lists] > > Well, in case where several servers may start the same virtual machines after a reboot for exemple. > http://lists.ceph.com/pipermail/ceph-users-ceph.com/2013-August/003887.html Isn't the existing virtlockd support already sufficient for this? If not, what is preventing the virtlock framework from interacting with rbd disks? http://libvirt.org/locking.html -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org

...M, NEVEU Stephane wrote: > > Eric, > > [please don't top-post on technical lists] > > > > > Well, in case where several servers may start the same virtual machines after a reboot for exemple. > > http://lists.ceph.com/pipermail/ceph-users-ceph.com/2013-August/003887.html > > Isn't the existing virtlockd support already sufficient for this? If > not, what is preventing the virtlock framework from interacting with rbd > disks? Nothing really. The current impl only deals with disks with type=file or type=block, ignoring type=network. We could e...

...libvirt hook looks good, but is there any expectation that this > arrangement will become a patch to libvirt itself, as is suggested by the > second link?* > > http://www.wogri.at/en/linux/ceph-libvirt-locking/ > > http://lists.ceph.com/pipermail/ceph-users-ceph.com/2013-August/003887.html > > Can anyone guide me on how to theoretically build a very "lock" safe 5-node > active-active KVM cluster atop Ceph RBD? Must I use sanlock with its NFS > or GFS2 with its performance bottlenecks? Does your answer work for LXC > (sans the current state of live mig...