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

Docker networking

A crucial feature of Docker is its networking features. The containers running on Docker communicate and interact transparently. Thanks to the network layer, Docker provides various networking aspects that are tackled efficiently, as follows:

  • Private networks
  • Internal DNS
  • Container communication
  • Bridging containers

Let’s see the available networks that are currently running:

$ docker network ls
NETWORK ID     NAME               DRIVER    SCOPE
6a149c758fc2   bridge             bridge    local
9ec7758d7050   chapter1_default   bridge    local
7c95e79497b6   chapter2_default   bridge    local
16fda3c38e57  ...