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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/templates/bigbang/networkpolicies/*📜

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

/chart/templates/bigbang/authorizationpolicies/*📜

  • Authorization Policies added to establish allowed layer 7 communication to the metrics-server API.

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, Authorization Policies, and metrics server enabled will allow the use of kubectl top nodes and kubectl top pods -A to report utilization.

Last update: 2024-01-03 by Blane Staskiewicz