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
Building Docker Images

Building images is the first step in deploying your own container-based applications. It is a simple process and anyone can build images from scratch, but it is not easy to create images with sufficient quality and security for production. In this chapter, we will learn all the basics and tips and tricks for creating good, production-ready images. We will review the requirements for saving and distributing our work, as well as how to improve these processes to get better performance when the number of images and releases is substantial in enterprise environments.

In this chapter, we will cover the following topics:

  • Building Docker images
  • Understanding copy-on-write filesystems
  • Building images with a Dockerfile reference
  • Image tagging and meta-information
  • Docker registries and repositories
  • Securing images
  • Managing images and other related objects
  • Multistage...