Helm in Practice

Learn Helm by installing real charts and building your own, one concept at a time.

Problem: TODO

Solution: TODO

What You'll Learn

TODO

TODO — 建議先完成 Kubernetes in Practice。

The Role of Helm in Kubernetes — Kubernetes has no idea which objects form one app; Helm packages them as charts and tracks installs as releases.
Benefits and Limitations of Helm — seven benefits and five limitations: simpler deployments, consistent environments and rollbacks, weighed against templating complexity, chart security, in-cluster state and risky upgrades.
Helm vs. Kustomize — templates and values vs. base and patches: the same change both ways, and when to use which.
Helm Architecture — how developers, chart repositories and CI/CD fit together; the chart files and common commands; and what helm install does, from rendering to the release Secret.

Part 2 — Installing Tools

Installing Tools — a single-node kubeadm cluster plus Helm and k9s, via the companion Ansible tutorial.

Part 3 — Helm Fundamentals

Exploring Artifact Hub — find charts, read a chart's page, and choose between charts for the same software.
Managing Helm Repositories — helm repo add, update, search and pull, the local index cache, and OCI registries.
Installing the WordPress Chart — a default StorageClass, one helm install, and what it created. Lab: open the site through a port-forward.
Exploring the Chart's Configuration — helm show for a chart's defaults, helm get for what a release used.
Uninstalling a Release — helm uninstall, --keep-history, and what uninstall leaves behind.
Cleaning Up Kubernetes Resources — the zombie volume problem, and a cleanup checklist. Lab: reinstall onto a leftover PVC and watch it fail.
Setting Values via the CLI — --set syntax, the type trap, and which values survive an upgrade.
Setting Values via Files — values files with -f, layering, precedence, and keeping them in Git.

Part 4 — Creating Our Own Helm Charts