Chapter 9. Live migration

Procedure

1. In the OpenShift Virtualization console, click Workloads Virtualization from the side menu.
2. Click the Virtual Machines tab.

3. You can initiate the migration from this screen, which makes it easier to perform actions on multiple virtual machines in the one screen, or from the Virtual Machine Overview screen where you can view comprehensive details of the selected virtual machine:

   • Click the Options menu at the end of virtual machine and select Migrate Virtual Machine.
   • Click the virtual machine name to open the Virtual Machine Overview screen and click Actions Migrate Virtual Machine.
4. Click Migrate to migrate the virtual machine to another node.

Procedure

1. Create a VirtualMachineInstanceMigration configuration file for the virtual machine instance to migrate. For example, vmi-migrate.yaml:

   apiVersion: kubevirt.io/v1alpha3
   kind: VirtualMachineInstanceMigration
   metadata:
     name: migration-job
   spec:
     vmiName: vmi-fedora

2. Create the object in the cluster by running the following command:

   $ oc create -f vmi-migrate.yaml

Procedure

1. In the OpenShift Virtualization console, click Workloads Virtualization from the side menu.
2. Click the Virtual Machines tab.
3. Select a virtual machine to open the Virtual Machine Overview screen.

Procedure

1. In the OpenShift Virtualization console, click Workloads Virtualization from the side menu.
2. Click the Virtual Machines tab.

3. You can cancel the migration from this screen, which makes it easier to perform actions on multiple virtual machines, or from the Virtual Machine Overview screen where you can view comprehensive details of the selected virtual machine:

   • Click the Options menu at the end of virtual machine and select Cancel Virtual Machine Migration.
   • Select a virtual machine name to open the Virtual Machine Overview screen and click Actions Cancel Virtual Machine Migration.
4. Click Cancel Migration to cancel the virtual machine live migration.

Procedure

1. Add the evictionStrategy: LiveMigrate option to the spec section in the virtual machine configuration file. This example uses oc edit to update the relevant snippet of the VirtualMachine configuration file:

   $ oc edit vm <custom-vm> -n <my-namespace>

   apiVersion: kubevirt.io/v1alpha3
   kind: VirtualMachine
   metadata:
     name: custom-vm
   spec:
     terminationGracePeriodSeconds: 30
     evictionStrategy: LiveMigrate
     domain:
       resources:
         requests:
   ...

2. Restart the virtual machine for the update to take effect:

   $ virtctl restart <custom-vm> -n <my-namespace>