The ungleich virtualisation handbook¶

Introduction¶

• A place is autonomous data center and does not share resources with another place.
• The storage clusters are separated so that they don't influence each other
• Networks are place local -> changing the place means changing the IP addresses

Migrating a VM from one place to another¶

• Find the VM id (onevm list in opennebula)
• Stop the VM (onevm stop <vimid>)
• Locate the disk in ceph
  • Locate the correct ceph pool: ceph osd lspools
  • rbd list -p <CEPH POOL> | grep <VMID>
  • This gives you the image name
• Login to the destination place and find out the target ceph pool
  • Locate the correct ceph pool: ceph osd lspools (this is the TARGET POOL)
• Transfer the disk into the other place ceph cluster
  • rbd export <CEPH POOL>/<IMAGE NAME> - | ssh server-in-other-place "rbd import <TARGET POOL>/import-<VMID>"

See Also¶

• For storage see The ungleich ceph handbook