Book Image

A Developer's Essential Guide to Docker Compose

By : Emmanouil Gkatziouras
Book Image

A Developer's Essential Guide to Docker Compose

By: Emmanouil Gkatziouras

Overview of this book

Software development is becoming increasingly complex due to the various software components used. Applications need to be packaged with software components to facilitate their operations, making it complicated to run them. With Docker Compose, a single command can set up your application and the needed dependencies. This book starts with an overview of Docker Compose and its usage and then shows how to create an application. You will also get to grips with the fundamentals of Docker volumes and network, along with Compose commands, their purpose, and use cases. Next, you will set up databases for daily usage using Compose and, leveraging Docker networking, you will establish communication between microservices. You will also run entire stacks locally on Compose, simulate production environments, and enhance CI/CD jobs using Docker Compose. Later chapters will show you how to benefit from Docker Compose for production deployments, provision infrastructure on public clouds such as AWS and Azure, and wrap up with Compose deployments on said infrastructure. By the end of this book, you will have learned how to effectively utilize Docker Compose for day-to-day development.
Table of Contents (19 chapters)
1
Part 1: Docker Compose 101
6
Part 2: Daily Development with Docker Compose
12
Part 3: Deployment with Docker Compose

Network and Volumes Fundamentals

In the previous chapter, we managed to create our core Go application and provide storage using a Redis server. By having our core application in place, we proceeded to more advanced Docker concepts such as health checks, building images, tagging, and logically grouping using labels. The usage of volumes and networking was present throughout the chapter. Networking and volumes were being used all along; however, it was done transparently. This chapter will focus extensively on networks and volumes and how to configure them on a Compose-based application.

The first part will focus on volumes, how volumes map to Compose, how they work behind the scenes, and how to use them. Volumes play a crucial role in Docker. They allow you to attach external documentation and files that are needed for an application. Volumes can be shared and used to help with operations in an application.

The second part will focus on networks. Docker provides networking...