Docker Quick Start Guide

By : Waud

4.7 (12)

Buy this Book

Docker Quick Start Guide

4.7 (12)

By: Waud

Buy this Book

Overview of this book

Docker is an open source software platform that helps you with creating, deploying, and running your applications using containers. This book is your ideal introduction to Docker and containerization. You will learn how to set up a Docker development environment on a Linux, Mac, or Windows workstation, and learn your way around all the commands to run and manage your Docker images and containers. You will explore the Dockerfile and learn how to build your own enterprise-grade Docker images. Then you will learn about Docker networks, Docker swarm, and Docker volumes, and how to use these features with Docker stacks in order to define, deploy, and maintain highly-scalable, fault-tolerant multi-container applications. Finally, you will learn how to leverage Docker with Jenkins to automate the building of Docker images and the deployment of Docker containers. By the end of this book, you will be well prepared when it comes to using Docker for your next project.

Preface

Who this book is for

What this book covers

To get the most out of this book

Get in touch

Free Chapter

Setting up a Docker Development Environment

Technical requirements

Setting up your Docker development environment

What differences to watch out for between OSes

Summary

Learning Docker Commands

Technical requirements

Information about command syntax

The version command

The Docker run command

Summary

Creating Docker Images

Technical requirements

What is a Dockerfile?

The FROM instruction

The LABEL instruction

The COPY instruction

The ADD instruction

The ENV instruction

The ARG instruction

The USER instruction

The WORKDIR instruction

The VOLUME instruction

The EXPOSE instruction

The RUN instruction

The CMD instruction

The ENTRYPOINT instruction

The HEALTHCHECK instruction

The ONBUILD instruction

The STOPSIGNAL instruction

The SHELL instruction

The Docker image build command

Summary

Docker Volumes

Technical requirements

What is a Docker volume?

Creating Docker volumes

Removing volumes

Sharing data between containers with data volume containers

Summary

Docker Swarm

Technical requirements

What is Docker swarm?

How to set up a Docker swarm cluster

Managers and workers

Swarm services

Accessing container applications in a swarm

Summary

Docker Networking

Technical requirements

What is a Docker network?

Built-in (local) Docker networks

Third-party (remote) network drivers

Creating Docker networks

Free networking features

Which Docker network driver should I use?

Summary

Docker Stacks

Technical requirements

Understanding the use of Docker stacks

How to create and use a compose YAML files for Stacks

The rest of the stack commands

Best practices for scaling a stack application

Summary

Docker and Jenkins

Technical requirements

Using Jenkins to build Docker images

Setting up a Dockerized Jenkins server

Building Docker images inside of a Dockerized Jenkins server

Using Docker containers for your Jenkins build nodes

Building, testing, and pushing Docker images inside Dockerized build nodes

Summary

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Using Docker containers for your Jenkins build nodes

To use Docker containers for the Jenkins build agents, you need to do a few things to your Jenkins configuration:

Build a new Docker image that can act as a Jenkins build agent, and is capable of building Docker images (of course)
Push the new image to a Docker registry
Turn off the default Jenkins build agents
Install the Docker plugin for Jenkins
Configure a new cloud to enable Dockerized build agents

Building the Docker image

Let's get started. The first thing we want to do is build our specialized Docker image that can be used for our Jenkins agents. To do this, we are going to use the skills we learned in Chapter 3, Creating Docker Images, to create Docker images...