How to confirm a version upgrade of Rancher v2.x is completed successfully

Task

This article details how to confirm that a Rancher version upgrade has successfully completed.

Pre-requisites

• A Rancher v2.x instance, either a single Docker container or a Highly Available (HA) installation in Kubernetes
• A Rancher version upgrade performed per the Rancher upgrade documentation

Resolution

The following can be verified to confirm that the Rancher component containers have all been successfully upgrade to the newer version:

• Within the Rancher UI, confirm the version in the bottom-left corner displays the newer version.
• For a HA installation, confirm the rancher Deployment Pods within the cattle-system namespace of the Rancher cluster have all been updated to the newer version.
• Confirm that the Rancher agent workloads (the cattle-node-agent DaemonSet and cattle-cluster-agent Deployment in the cattle-system namespace) in all of the Rancher managed clusters have been updated to the newer version.