Practical Docker with Python: Build, Release, and Distribute Your Python App with Docker

Table of Contents
About the Author
About the Technical Reviewer
Acknowledgments
Introduction
Chapter 1: Introduction to Containerization
	What Is Docker?
		Understanding Problems that Docker Solves
	Containerization Through the Years
		1979: chroot
		2000: FreeBSD Jails
		2005: OpenVZ
		2006: cgroups
		2008: LXC
	Containers and Virtual Machines
		Container Runtimes
		OCI and CRI
	Docker and Kubernetes
	Summary
Chapter 2: Docker 101
	Installing Docker
		Installing Docker on Windows
		Installing Docker on Windows Using WSL2 Backend
			About WSL
			Requirements for Installing and Enabling WSL2
		Installing on macOS
		Installing on Linux
			Additional Steps
		Understanding Jargon Around Docker
			Layers
			Docker Image
			Docker Tags
			Docker Container
			Bind Mounts and Volumes
			Docker Repository
			Docker Registry
			Dockerfile
			Docker Engine
				Docker Daemon
				Docker CLI
				Docker API
			Docker Compose
			Docker Machine
		Hands-on Docker
			Working with Docker Images
			Working with a Real-World Docker Image
	Summary
Chapter 3: Building the  Python App
	About the Project
	Setting Up Telegram Messenger
	BotFather: Telegram’s Bot Creation Interface
		Creating the Bot with BotFather
	Newsbot: The Python App
		Getting Started with Newsbot
		Running Newsbot
		Sending Messages to Newsbot
	Summary
Chapter 4: Understanding the Dockerfile
	Dockerfile Primer
		Build Context
	Dockerignore
	BuildKit
		Building Using Docker Build
		Tags
	Dockerfile Instructions
		FROM
		WORKDIR
		ADD and COPY
		RUN
			Layer Caching
		CMD and ENTRYPOINT
		ENV
		VOLUME
		EXPOSE
		LABEL
	Guidelines and Recommendations for Writing Dockerfiles
	Using Multi-Stage Builds
	Exercises
	Summary
Chapter 5: Understanding Docker Volumes
	Data Persistence
	Example of Data Loss Within a Docker Container
		tmpfs Mounts
		Bind Mounts
		Docker Volumes
			Docker Volume Subcommands
			Volume Create
			Volume Inspect
			List Volumes
			Prune Volumes
			Remove Volumes
	Using Volumes When Starting a Container
	The VOLUME Instruction in Dockerfiles
	Exercises
	Summary
Chapter 6: Understanding Docker Networks
	Why Do We Need Container Networking?
		Default Docker Network Drivers
			Bridge Networks
			Host Networks
			Overlay Networks
			Macvlan Networks
			None Networking
	Working with Docker Networks
		Bridge Networks
			Creating Named Bridge Networks
			Connecting Containers to Named Bridge Networks
		Host Networks
	Exercises
	Summary
Chapter 7: Understanding Docker Compose
	Overview of Docker Compose
	Installing Docker Compose
	Docker Compose Basics
	Docker Compose Version Overview
		Compose File Versioning and the Compose Spec
		Version 1
		Version 2
		Version 3
	Compose Specification
	Docker Compose File Reference
		Services Key
		Build Key
			Context Key
			Image Key
			environment/env_file Key
			depends_on Key
			Image Key
			ports Key
			Volumes Key
			Restart Key
	Docker Compose CLI Reference
		The build Subcommand
		The down Subcommand
		The exec Subcommand
		The logs Subcommand
		The stop subcommand
	Exercises
	Summary
Chapter 8: Preparing for Production Deployments
	Continuous Integration (CI)
		GitHub Actions
	Container Orchestration
		The Need for Orchestrators
		How Do Orchestrators Work?
			Popular Orchestrators
			Kubernetes
				Kubernetes Control Plane
				Kubernetes Worker Plane
				A Look at kind
				Creating Kubernetes Clusters Using kind
				Running a Sample Service in Kubernetes
				Pods and Deployments
	Exercises
	Summary
Index