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How to upgrade the Metrics Server Package chart📜

This chart is reconciled against the upstream chart as declared in the Kptfile.

When an upgrade is required, kpt can be ran to pull the updates with a targeted tag.

(from the repository root) kpt pkg update chart@<new tag> --strategy alpha-git-patch

Once completed, you will need to reconcile the modifications that Big Bang makes back into the orchestration.

Modifications Made to the upstream chart📜

/chart/Chart.yaml📜

  • Added bigbang.dev/applicationVersions annotation with the metrics server version
  • Modified Version to include -bb.x suffix

/chart/bigbang/networkpolicies/*📜

  • Network Policies added to establish allowed communication in/out of namespace

chart/values.yaml📜

  • Add common values for Big Bang packages for domain, networkpolicies and Istio
  • Increase replicas to 2 for failover
  • Add affinity rules to schedule pods to separate nodes
  • Addition of serviceAccount.automountServiceAccountToken to allow API token automounting behavior to be configurable

chart/templates/serviceaccount.yaml📜

  • Addition of serviceAccount.automountServiceAccountToken to allow API token automounting behavior to be configurable

chart/templates/deployment.yaml📜

  • Overrides automountServiceAccountToken hardening at the Pod spec-level due to app requirements

chart/Kptfile📜

  • Tracks current upstream chart

Testing a new Metrics Server version📜

Current testing is done manually. Deployment of Big Bang with Istio, Monitoring, Network Policies and metrics server enabled will allow the use of kubectl top nodes and kubectl top pods -A to report utilization.

Last update: 2023-11-07 by Joe Foster