Performing Live Migration of a Confidential VM

To enable migration, add virtcca-migration-cap=1 to the QEMU startup parameter of the source server.

  <qemu:commandline>
    <qemu:arg value='-object'/>
    <qemu:arg value='tmm-guest,id=tmm0,sve-vector-length=128,num-pmu-counters=1,virtcca-migration-cap=1'/>
  </qemu:commandline>

Start the VM to be migrated.
```
virsh start <cvm-name>
```
cvm-name indicates the name of the VM to be migrated.
Perform a live cVM migration.
```
virsh migrate --live --verbose --copy-storage-all <cvm-name> --cvm-miguri <remote migcvm listening ip address> qemu+ssh://<dest-ip>/system.
```
In the preceding command:
- cvm-name indicates the name of the VM to be migrated.
- dest-ip indicates the IP address of the peer server.
- --copy-storage-all is used in non-shared storage scenarios. During the migration, all VM image files are copied to the destination node.
- --verbose is used to display the migration progress. If --copy-storage-all is added, the progress is displayed in two segments. The first segment is the file transfer progress, and the second segment is the live migration progress.
  In the non-shared storage scenario, the following error message is displayed during the migration.
  
  error: Unsafe migration: Migration without shared storage is unsafe
  
  You can add --unsafe to avoid this problem.
  
  virsh migrate --live --verbose --unsafe --copy-storage-all <cvm-name> --cvm-miguri <remote migcvm listening ip address> qemu+ssh://<dest-ip>/system.

Parent topic: Enabling Live cVM Migration