Open Infrastructure

h1. The ungleich virtualisation handbook

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h2. 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

h2. Migrating a VM from one place to another

* 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

h2. See Also

* For storage see [[The ungleich ceph handbook]]