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

Creating Advanced CI/CD Tasks

In the previous chapter, we managed to simulate an AWS environment locally through a Compose application. We mocked AWS services such as DynamoDB, S3, and SQS. Also, we simulated the invocation of Lambda functions through Docker containers and came up with a workaround to simulate traffic toward SQS-based Lambda services by introducing an extra service in the Compose installation.

This enabled us to be focused on developing our application without the need to interact with the AWS console, provision any AWS infrastructure, and deal with the needs of a cloud-hosted environment. From the beginning, we were focused on developing the application locally and simulating the components needed.

Since we have been productive so far in developing the application, the next logical step is to introduce some CI/CD to our current application. Throughout the development life cycle, we want our application to build, test, and deploy automatically.

Our Lambda...