Book Image

Docker Certified Associate (DCA): Exam Guide

By : Francisco Javier Ramírez Urea
Book Image

Docker Certified Associate (DCA): Exam Guide

By: Francisco Javier Ramírez Urea

Overview of this book

Developers have changed their deployment artifacts from application binaries to container images, and they now need to build container-based applications as containers are part of their new development workflow. This Docker book is designed to help you learn about the management and administrative tasks of the Containers as a Service (CaaS) platform. The book starts by getting you up and running with the key concepts of containers and microservices. You'll then cover different orchestration strategies and environments, along with exploring the Docker Enterprise platform. As you advance, the book will show you how to deploy secure, production-ready, container-based applications in Docker Enterprise environments. Later, you'll delve into each Docker Enterprise component and learn all about CaaS management. Throughout the book, you'll encounter important exam-specific topics, along with sample questions and detailed answers that will help you prepare effectively for the exam. By the end of this Docker containers book, you'll have learned how to efficiently deploy and manage container-based environments in production, and you will have the skills and knowledge you need to pass the DCA exam.
Table of Contents (22 chapters)
1
Section 1 - Key Container Concepts
8
Section 2 - Container Orchestration
12
Section 3 - Docker Enterprise
17
Section 4 - Preparing for the Docker Certified Associate Exam
Deploying Multi-Container Applications

In this chapter, we will learn about the Docker Compose tool, a key component of any Docker environment. Using Docker Compose, we can manage multi-container applications, and all the actions and functionalities we usually use to manage a container-based application will be made available in multi-container environments by Docker Compose. We are able to build all the required images for a project at once. There is no need to build, pull/push, and execute containers one by one. We can declare all the pieces, along with their interconnections, storage, environments, and so on, in a single file. We are also able to debug multi-container applications from a single endpoint, which is vital when you have many separate elements running on production environments.

But this is not just a tool. Docker Compose declares a new type of file, docker-compose...