Hi all, We are working on nova live-migration using Ceph. Before live-migration, Nova does a check to see if the remote is on shared storage.
In order to make this test pass, we have patched Nova to always return True in _check_shared_storage_test_file located in nova/virt/libvirt/driver.py The problem here is that since Nova assumes that /var/lib/nova/instances is on shared storage on both destination and source, we need to manually rsync the /var/lib/nova/instances/instance-id to the destination before running nova live-migration. See the discussion at http://t3349.file-systems-ceph-user.file-systemstalk.us/live-migration-of-vm-using-librbd-and-openstack-t3349.html Currently, Nova doesn’t recognize Ceph backed VMs as being on shared storage and doesn’t transfer over the necessary folder before migration. I was wondering if the feature was already available, or on the feature list to be added to Nova. Or if we should be patching Nova to copy the folder over to the destination before live-migration. Regards, Yagmur Akbulut
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