This is a simple and easy way to migrate your domains, but please note that
as the domain has been removed from the active domains while being saved,
the services running on the domain will no longer be available or accessible.
If this service interruption is unacceptable to you, you should consider the
live migration feature of Xen that we will discuss in the next section.
Live Migration
In the previous section we explored the simplest way to migrate domains on your
Xen server. This simple way will not be an option in cases where you have SLA
on your servers or where you want to minimize the interruption of services. Xen
provides a powerful feature called live migration that lets you migrate running
domains to a different Xen server with minimal disruption to the services. In this
section we will discuss live migration and the process that Xen goes through under
the covers in order to make it happen.
Time for Action??”Relocation of an Active
Running domain
The server configuration that we will use for live migration consists of the following:
palantir: A Xen host server that will run a Ubuntu Feisty guest domain,
which uses a NFS exported directory.
boromir: A Xen host server that serves as the destination for the migration of
the Ubuntu Feisty guest domain from the palantir server.
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Chapter 8
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??? frodo: A linux NFS server that will provide the storage for the Xen
domains over the network.
The following diagram shows the configuration.
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