Anthos VM Runtime is released for General Availability (GA) with the release of Anthos clusters on bare metal version 1.12.0. All earlier releases of Anthos VM Runtime are in Preview. You can't upgrade from a Preview version to the GA version without first deleting your VMs and disabling Anthos VM Runtime. Once you've upgraded your clusters, then you can enable Anthos VM Runtime again and recreate your VMs.
To upgrade from a pre-GA version of Anthos VM Runtime:
Delete all VMs and their resources from the cluster.
For instructions for version 1.10 clusters, see Delete VMs and their resources in the 1.10 documentation. For instructions for 1.11 clusters, see Delete VMs and their resources in the 1.11 documentation.
Disable Anthos VM Runtime.
For instructions for version 1.10 clusters, see Disable Anthos VM Runtime in the 1.10 documentation. For instructions for 1.11 clusters, see Disable Anthos VM Runtime in the 1.11 documentation.
If Multus is installed on your cluster, uninstall it.
Multus is used with the multi-NIC for pods feature.
Upgrade the cluster to version 1.12.0 or higher.
You can't skip minor versions when upgrading your Anthos clusters on bare metal. For example, if you have a version 1.10 cluster, you must first upgrade to version 1.11 before you can upgrade to version 1.12.0 or higher. For more information, see Upgrade clusters.
Enable Anthos VM Runtime on your 1.12.0 cluster.
For instructions, see Enable Anthos VM Runtime.
Recreate your VMs.
Due to changes in the VM schema for the GA release of Anthos VM Runtime, you must recreate your VMs. For use with Anthos VM Runtime on version 1.12.0 or higher clusters.