Anthos GKE - June 17th, 2021 [Issue]

## Issue When you upgrade an unregistered Anthos cluster on VMware from a version earlier than 1.7.0 to a version 1.7.0 or later, you need to manually install and configure the Anthos Config Management operator. If you had previously installed Anthos Config Management, you need to re-install it. For details on how to do this, see [Installing Anthos Config Management](https://cloud.google.com/anthos-config-management/docs/how-to/installing). If you are using a private registry for software images, upgrading an Anthos cluster on VMware will always require special steps, described in [Updating Anthos Config Management](https://cloud.google.com/anthos-config-management/docs/how-to/updating-private-registry) using a private registry. Upgrading from a version earlier than 1.7.0 to a version 1.7.0 or later additionally requires that you manually install and configure the Anthos Config Management operator as described in [Installing Anthos Config Management](https://cloud.google.com/anthos-config-management/docs/how-to/installing).