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

Find the VM id (onevm list in opennebula) ("SOURCE-VMID")
Stop the VM (onevm stop <SOURCE-VMID>)
Locate the disk in ceph
- Locate the correct ceph pool: ceph osd lspools ("SOURCE-POOL")
- rbd list -p <SOURCE-POOL> | grep <SOURCE-VMID>
- This gives you the SOURCE-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)
We define the TARGET-IMAGE-NAME = import-SOURCE-VMID
Transfer the disk into the other place ceph cluster
- rbd export <SOURCE-POOL>/<SOURCE-IMAGE-NAME> - | ssh <ANY SERVER IN OTHER PLACE> "rbd import - <TARGET-POOL>/<TARGET-IMAGE-NAME>"
Create a new VM in the target place with the same parameters as the original VM
- CPU, VCPU, RAM, disk size
- It's id is the TARGET-VMID
Stop the new VM
Locate the disk of the new VM
- rbd list -p <TARGET-POOL> | grep <TARGET-VMID>
- The name of this disk is NEW-DISK-ID
Delete the disk of the new VM
- rbd rm <TARGET-POOL>/<NEW-DISK-ID>
Move the imported image to replace the disk we deleted
- rbd mv <TARGET-POOL>/<TARGET-IMAGE-NAME> <TARGET-POOL>/<NEW-DISK-ID>
Start the VM
Checkout the network configuration, update the customer with the new network details