Beginning DevOps with Docker: Automate the deployment of your environment with the power of the Docker toolchain

Muli

$16.99

3.9 (7 Ratings)

Paperback May 2018 96 pages 1st Edition

Muli

$16.99

3.9 (7 Ratings)

Paperback May 2018 96 pages 1st Edition

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Beginning DevOps with Docker

Chapter 2. Application Container Management

In this lesson, we will scale one of the containers we built into a multi-tier setup. This will involve splitting the application into different logical sections. For example, we could have an application running on a Docker container and the application's data in a separate database container; however, both should work as a single entity. For this, we will use Docker's tool for running multi-container applications. The tool goes by the name docker-compose. In summary, docker-compose is the tool used for defining and running multi-container Docker applications.

The docker-compose Tool

Let's begin the lesson by looking at what a multi-container setup is, why it is important, and how Docker, with the tool docker-compose, works like a charm in such scenarios.

We have recently been introduced to how applications work, with their separate elements: frontend, backend, and database.

To run such a multi-tier application using Docker, one would need to run the following commands to spin up the containers in different terminal sessions:

- docker run <front-end>
- docker run <back-end>
- docker run <database>

Note

You can run docker run with (-d) as detached to prevent us from running the three commands in separate sessions, for example: docker run <front-end> -d

That said, it even becomes particularly tasking linking different containers (networking).

docker-compose comes in to save the day. We can define and run multi-containers from one file - docker-compose.yml. In the following topics, we'll discuss this further. First,...

Key benefits

Learn how to structure your own Docker containers
Create and manage multiple configuration images
Understand how to scale and deploy bespoke environments

Description

Making sure that your application runs across different systems as intended is quickly becoming a standard development requirement. With Docker, you can ensure that what you build will behave the way you expect it to, regardless of where it's deployed. By guiding you through Docker from start to finish (from installation, to the Docker Registry, all the way through to working with Docker Swarms), we’ll equip you with the skills you need to migrate your workflow to Docker with complete confidence.

Who is this book for?

This book is ideal for developers, system architects and site reliability engineers (SREs) who wish to adopt a Docker-based workflow for consistency, speed and isolation of system resources within their applications. You’ll need to be comfortable working with the command line.

What you will learn

Learn to design and build containers for different kinds of applications
Create a testing environment to identify issues that may cause production deployments to fail
Discover how you can correctly structure and manage a multi-tier environment
Run, debug, and experiment with example applications in Docker containers

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Learn Docker - Fundamentals of Docker 18.x

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Rohith Sep 21, 2023

Subscriber review

Gary Waltman Jul 07, 2019

Easy read

Amazon Verified review

Amazon Customer Jun 14, 2018

Excellent book.

Dominic Motuka Jul 09, 2018

Joseph has a solid grasp of the subject and understands that DevOps is more than just a series of scripts written and maintained by the (mostly) operations staff that tries to run with DevOps. Docker has been introduced to us ( the readers ) in a simple way.Well written and nicely illustrated with color images. This is an excellent introduction to Docker.

NdagiStanley Aug 22, 2018

Beginning DevOps with Docker is a must-read for individuals who expect proper code and written analogies that will enhance their understanding of the overall use of docker in DevOps. The docker commands are well explained, everything to get you from beginner to guru.

Beginning DevOps with Docker: Automate the deployment of your environment with the power of the Docker toolchain

What do you get with Print?

Beginning DevOps with Docker

Chapter 2. Application Container Management

Lesson Objectives

The docker-compose Tool

Note

Overview of a Multi-Container Application Setup

Managing Multiple Containers and Distributed Application Bundles

Note

Improve a Docker Workflow

Networking with docker-compose

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Beginning DevOps with Docker: Automate the deployment of your environment with the power of the Docker toolchain

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