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Hi, I am interested to find out how libvirt envisions image
locking. i.e., how do we make sure multiple nodes are not trying to
access the same storage volume, probably causing image corruption. I know this can be solved by means of a cluster, but it
seems excessive (and not possible in all scenarios). Central administration (ovirt-like) is also problematic,
since unless fencing is assumed, it cannot verify the image is no longer being
used. If the image/storage volume could be locked (or leased
lock), either by the storage/LVM/NFS preventing from a node access to a
specific image, or by having libvirt/qemu mutually check the lock before accessing
it (very simply, in leased lock we can check every X minutes, and kill the
process to make sure it honors the lock). Any thoughts on the subject? Thanks, Itamar |
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