Red Hat Enterprise Linux Server Cookbook

Moving VMs

Moving disks will mitigate the risk of failing disks. When your CPUs, memory, and other non-disk-related components start failing, you have no other option but to move the guests to other host(s).

The recipe for this task is rather simple, but it's the prerequisites that can make it succeed or fail miserably.

Getting ready

The prerequisites for this recipe are quite extended.

For the host, the following are the requirements:

• You'll need to have access to shared data. Both the source and destination KVM machine will need to be able to access the same storage—for example, iSCSI, NFS, and so on.
• Both hosts need the same type of CPU—that is, Intel or AMD (one cannot live migrate a guest from a host with Intel CPUs to a host with AMD CPUs).
• Both ...