15.6. Migrating with virt-manager

This section covers migrating a KVM guest virtual machine with virt-manager from one host physical machine to another.

Connect to the target host physical machine
In the virt-manager interface, connect to the target host physical machine by selecting the File menu, then click Add Connection.
Add connection
The Add Connection window appears.

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Figure 15.1. Adding a connection to the target host physical machine
Enter the following details:
- Hypervisor: Select QEMU/KVM.
- Method: Select the connection method.
- Username: Enter the user name for the remote host physical machine.
- Hostname: Enter the host name for the remote host physical machine.
Note
For more information on the connection options, see Section 19.5, “Adding a Remote Connection”.
Click Connect. An SSH connection is used in this example, so the specified user's password must be entered in the next step.

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Figure 15.2. Enter password
Configure shared storage
Ensure that both the source and the target host are sharing storage, for example using NFS.
Migrate guest virtual machines
Right-click the guest that is to be migrated, and click Migrate.
In the New Host field, use the drop-down list to select the host physical machine you wish to migrate the guest virtual machine to and click Migrate.

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Figure 15.3. Choosing the destination host physical machine and starting the migration process
A progress window appears.

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Figure 15.4. Progress window
If the migration finishes without any problems, virt-manager displays the newly migrated guest virtual machine running in the destination host.

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Figure 15.5. Migrated guest virtual machine running in the destination host physical machine