Live VM migration is the process of moving a running virtual machine from one physical host to another without causing any disruption to its services. The following are the steps involved in live VM migration:
Check the source and destination hosts: Before initiating the live VM migration, the administrator needs to make sure that the source and destination hosts have the necessary resources, such as CPU, memory, and storage, to support the migrated virtual machine.
Enable the migration feature: The migration feature should be enabled on both the source and destination hosts. This involves configuring the migration network, which is used for transferring the VM data between the hosts.
Select the virtual machine: The administrator needs to select the virtual machine that is going to be migrated and make sure that it meets the requirements for live migration.
Start the migration: The administrator can initiate the live migration either through the virtualization management console or through the command-line interface. During the migration, the virtual machine's memory, CPU state, and network connections are transferred from the source to the destination host.
Monitor the migration progress: The administrator should monitor the live migration process to ensure that it is proceeding as expected. Any issues that arise during the migration should be resolved promptly to avoid disrupting the virtual machine's services.
Complete the migration: Once the virtual machine has been successfully migrated to the destination host, the administrator can verify that its services are running as expected. The source host can then be released from the migrated virtual machine's control.
Post-migration cleanup: Any remaining resources associated with the migrated virtual machine, such as snapshots and storage volumes, should be cleaned up to avoid resource waste.
Overall, live VM migration is a useful feature in virtualization environments, as it allows administrators to balance resource utilization and avoid service disruptions during maintenance or load balancing operations.
