Upgrading Cisco Container Platform and upgrading tenant clusters are independent operations. You must upgrade the Cisco Container Platform to allow tenant clusters to upgrade. Specifically, tenant clusters cannot be upgraded to a higher version than the Control
Plane. For example, if the Control Plane is at version 1.10, the tenant cluster cannot be upgraded to the 1.11 version.
Upgrading Cisco Container Platform is a three-step process:
Taking a snapshot of the VMs managed by Cisco Container Platform is currently unsupported and results in failures during upgrades.
You can update the size of a single IP address pool during an upgrade. However, we recommend that you plan ahead for the free
IP address requirement by ensuring that the free IP addresses are available in the Control Plane cluster prior to the upgrade.
If you are upgrading from a Cisco Container Platform version:
3.1.x or earlier, you must ensure that at least five IP addresses are available.
3.2 or later, you must ensure that at least three IP addresses are available.