⎈ Helm for Developers
Tutorial Prerequisites Decks ↗ GitHub ↗
Home / Extending Helm
Part 6 2 chapters

Extending Helm

Helm 4 plugins, including a subprocess plugin and a Wasm plugin, and post-renderer plugins.

Chapter 22

Plugins

Helm 4 plugin types and runtimes. You write a subprocess cli/v1 plugin, build a Wasm plugin with Go, and install both under the default signature policy.

40 minutesRead →
Chapter 23

Post-renderers

Change what a chart renders without forking it. You write a postrenderer/v1 plugin that runs kubectl kustomize and call it with --post-renderer and --post-renderer-args.

35 minutesRead →
← Previous part Distribution and supply chain Next part → Delivery and operations

Helm for Developers

A chaptered, hands-on tutorial for Helm 4: one Python 3.14 (3.15-ready) FastAPI shipping application taken from raw manifests to a signed, GitOps-delivered chart on minikube and OpenShift.

Tutorial

  • Outline
  • Prerequisites
  • Helm 4 tour
  • Roadmap

Reference

  • Helm docs ↗
  • Helm HIPs ↗
  • View on GitHub ↗
  • Issues ↗
Open source · Apache 2.0 Last built 2026-10-08