Book Image

Developing with Docker

By : Jaroslaw Krochmalski, Jarosław Krochmalski
Book Image

Developing with Docker

By: Jaroslaw Krochmalski, Jarosław Krochmalski

Overview of this book

This fast-paced practical guide will get you up and running with Docker. Using Docker, you will be able to build, ship, and run many distributed applications in real time. You will start with quickly installing Docker and start working with images and containers. We will present different types of containers and their applications, and show you how to find and build images. You will learn how you can contribute to the image repository by publishing different images. This will familiarize you with the image building process and you will be able to successfully run your programs within containers. By finishing this book, you will be well equipped in deploying your applications using Docker and will have a clear understanding of concepts, techniques, and practical methods to get it running in production systems.

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Developing with Docker
Jaroslaw Krochmalski | Jarosław Krochmalski
Nov, 2016 | 262 pages
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Table of Contents (16 chapters)
Developing with Docker
Developing with Docker
Credits
Credits
About the Author
About the Author
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Introduction to Docker
Introduction to Docker
The basic idea
Containerization versus virtualization
Benefits of using Docker
Tools overview
Summary
2
Installing Docker
Installing Docker
Hardware requirements
Installing on Windows
Installing on Mac OS
Installing on Linux
Installing on the cloud — AWS
Summary
3
Understanding Images and Containers
Understanding Images and Containers
Images
Layers
Containers
Docker registry, repository and index
Summary
4
Networking and Persistent Storage
Networking and Persistent Storage
Docker networking
Docker volumes
Summary
5
Finding Images
Finding Images
The Docker Hub
Searching for images
Docker Hub and docker registry REST API
Summary
6
Creating Images
Creating Images
Dockerfile instructions
Using Dockerfiles
Summary
7
Running Containers
Running Containers
Runtime modes - detached and foreground
Identifying images and containers
Overriding default commands from Dockerfile
Executing arbitrary commands with exec
Monitoring containers
Container exit codes and restart policies
Runtime constraints on resources
Docker Swarm mode
Summary
8
Publishing Images
Publishing Images
Publishing images
Webhooks and automated builds
Summary
9
Using Docker in Development
Using Docker in Development
Using Docker with Maven
Spring Boot application in Docker container
Packaging Angular.js application
Summary
More Resources
More Resources
Official documentation
Awesome Docker
Training

Chapter 7.  Running Containers

In previous chapters, we have learned about the Docker architecture, networking, persistent storage, and the structure of Dockerfile. At this point, you should be able to create your own Docker image and start using it. Actually, we did run the containers several times, but without going into details; we are going to do that in this chapter. In this chapter, we are going to focus more on running the containerized software. This will include the following concepts:

  • Container running modes

  • Overriding the CMD and ENTRYPOINT

  • Monitoring containers

  • Exit codes and restart policies

  • Runtime constraints on resources

  • Docker Swarm mode

You will learn how to set up your containers to behave well when running by specifying the restart policy and runtime constraints. In Chapter 6, Creating Images, we already discussed the CMD and ENTRYPOINT commands of Dockerfile. In this chapter, we will focus on how to override them during the container startup, this time in detail. We will...

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