Helm Contents

📌 Introduction to Helm

What is Helm?
Why use Helm for Kubernetes application deployment?
Key components: Charts, Repositories, Releases

📚 Exploring the Official Helm Documentation

Navigating helm.sh/docs
Installation and prerequisites
Understanding the Helm CLI and commands
Helm 3 vs Helm 2 (brief overview)

🧩 Working with Existing Helm Charts

🔍 Discovering and Using Helm Repositories

Adding public and private chart repositories
Searching for charts (helm search hub vs helm search repo)
Repository management commands

🚀 Deploying a Helm Release

Installing a chart as a release
Setting a namespace for the deployment
Dry run and debug before actual deployment

⚙️ Customizing Charts with Values

Understanding values.yaml
Overriding values using:
- Custom values.yaml files
- --set CLI option
- --set-file and --set-string

🔁 Managing Helm Releases

Upgrading a release with updated values or chart versions
Rolling back to a previous release version
Viewing and diffing historical release versions
Uninstalling a release cleanly

🌐 Multi-Environment Helm Usage

Structuring values for different environments (dev, staging, prod)
Folder-based environment separation
Using --values with multiple files for environment-specific configs

🛠️ Creating Your Own Helm Charts

⚡ Helm Chart Quick Start

helm create mychart
Directory structure explained
Modifying the default template

🧬 Helm Template Engine and Syntax

How Helm renders templates
Using {{ .Values }}, {{ .Chart }}, {{ .Release }} objects

🏗 Built-in Objects and Functions

Overview of available Helm objects
Useful template functions (include, required, lookup, toYaml, etc.)
Best practices in chart templating

🧪 Testing and Validating Charts

helm lint and template validation
Using helm template for local rendering
Unit testing templates with tools like helm-unittest

🧰 Troubleshooting and Tips

Debugging with --debug and --dry-run
Common errors and how to fix them
Checking logs and Helm release history
Understanding exit codes and command output