Learning Helm: Managing Apps on Kubernetes

Copyright
Table of Contents
Preface
	Who Should Read This Book
	Why We Wrote This Book
	Navigating This Book
	Conventions Used in This Book
	Using Code Examples
	O’Reilly Online Learning
	How to Contact Us
	Acknowledgments
Chapter 1. Introducing Helm
	The Cloud Native Ecosystem
		Containers and Microservices
		Schedules and Kubernetes
	Helm’s Goals
		From Zero to Kubernetes
		Package Management
		Security, Reusability, and Configurability
	Helm’s Architecture
		Kubernetes Resources
		Charts
		Resources, Installations, and Releases
		A Brief Note About Helm 2
	Conclusion
Chapter 2. Using Helm
	Installing and Configuring the Helm Client
		Installing a Prebuilt Binary
		Guidance on Building from Source
		Working with Kubernetes Clusters
		Getting Started with Helm
	Adding a Chart Repository
	Searching a Chart Repository
	Installing a Package
		Configuration at Installation Time
	Listing Your Installations
	Upgrading an Installation
		Configuration Values and Upgrades
	Uninstalling an Installation
		How Helm Stores Release Information
	Conclusion
Chapter 3. Beyond the Basics with Helm
	Templating and Dry Runs
		The --dry-run Flag
		The helm template Command
	Learning About a Release
		Release Records
		Listing Releases
		Find Details of a Release with helm get
	History and Rollbacks
		Keeping History and Rolling Back
	A Deep Dive into Installs and Upgrades
		The --generate-name and --name-template Flags
		The --create-namespace Flag
		Using helm upgrade --install
		The --wait and --atomic Flags
		Upgrading with --force and --cleanup-on-fail
	Conclusion
Chapter 4. Building a Chart
	The Chart Creation Command
	The Chart.yaml File
	Modifying Templates
		The Deployment
	Using the Values File
		Container Images
		Exposing Services
		Resource Limits
	Packaging the Chart
	Linting Charts
	Conclusion
Chapter 5. Developing Templates
	The Template Syntax
		Actions
		Information Helm Passes to Templates
		Pipelines
		Template Functions
		Methods
		Querying Kubernetes Resources In Charts
		if/else/with
		Variables
		Loops
	Named Templates
	Structuring Your Templates for Maintainability
	Debugging Templates
		Dry Run
		Getting Installed Manifests
		Linting Charts
	Conclusion
Chapter 6. Advanced Chart Features
	Chart Dependencies
		Conditional Flags for Enabling Dependencies
		Importing Values from Child to Parent Charts
	Library Charts
	Schematizing Values Files
	Hooks
	Adding Tests to Charts
		Helm Test
		Chart Testing Tool
	Security Considerations
	Custom Resource Definitions
	Conclusion
Chapter 7. Chart Repositories
	The Repository Index
		An Example of a Chart Repository Index
		Generating an Index
		Adding to an Existing Index
	Setting Up a Chart Repository
		A Simple Chart Repository with Python
		Securing a Chart Repository
		Real-World Example: Using GitHub Pages
	Using Chart Repositories
		Adding a Repository
		Downloading Charts
		Listing Repositories
		Updating Repositories
		Removing a Repository
	Experimental OCI Support
		Enabling OCI Support
		Running a Local Registry
		Logging In to a Registry
		Logging Out of a Registry
		Storing a Chart in the Cache
		Listing Charts in the Cache
		Exporting a Chart from the Cache
		Pushing a Chart to the Registry
		Pulling a Chart from the Registry
		Removing a Chart from the Cache
	Related Projects
		ChartMuseum
		Harbor
		Chart Releaser
		S3 Plugin
		GCS Plugin
		Git Plugin
Chapter 8. Helm Plugins and Starters
	Plugins
		Installing Third-Party Plugins
		Custom Subcommands
		Building a Plugin
		plugin.yaml
		Hooks
		Downloader Plugins
		Execution Environment
		Shell Completion
	Starters
		Converting a Chart to a Starter
		Making Starters Available to Helm
		Using Starters
	Extending Helm Further
Appendix A. Chart API Versions
	API Version 2
		The Chart.yaml File
		The Chart.lock File
	API Version 1 (legacy)
		The Chart.yaml File
		The requirements.yaml File (Legacy)
		The requirements.lock File (Legacy)
Appendix B. Chart Repository API
	index.yaml
		The index.yaml Format
		When Is index.yaml Downloaded?
		When Is the Cached Version of index.yaml Used?
	.tgz Files
		When Are .tgz Files Downloaded?
	.prov Files
		When Are .prov Files Downloaded?
Index
About the Authors
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