Helm upgrade rollback

CKA v1.35 · Cluster Architecture, Installation and Configuration (25%) → "Use Helm and Kustomize to install cluster components" Target time: 12 minutes

Charts live at scenarios/cka/15-helm-upgrade-rollback/chart-v1 and chart-v2.

Namespace helm-lab has a Helm release edge. Someone upgraded it a few minutes ago and the pods have been broken since. Nobody remembers what changed.

1. Using Helm's own records, find what the last upgrade changed, and roll the release back to the last revision that worked. Do NOT fix it by hand-editing the Deployment.
2. Then upgrade edge to chart-v2 with replicaCount=2. The release must end up STATUS deployed, chart version 2.0.0, Deployment 2/2 on the chart's default image tag.
3. A forgotten release named stale exists somewhere in the cluster. Find it with Helm (you are not told the namespace) and uninstall it.
4. Save the release history of edge to /tmp/edge-history.txt.