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

Hosting your Docker images on AWS ECR

Previously, we have been building images for Compose applications that would later be stored and retrieved from the Docker host. To use the Docker images on ECS, a Docker Image registry is essential. The registry to use on AWS is ECR. By using ECR, we push and pull the images from the registry and use them on any workstation or server that has Docker installed, provided we have configured access to that registry.

ECR is a fully managed container registry. It is a highly available solution backed by AWS Simple Storage Service (S3), thus images are stored across multiple systems. Also, it has features such as scanning the images for vulnerabilities. By using a managed container registry, the maintenance overhead is reduced; for example, there is no need to provision a server or plan the storage capacity.

Another benefit of ECR is how well integrated it is with the rest of the AWS services. An ECS server or a Lambda function, provided they...