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

Understanding UCP components and features

Docker's UCP provides the control plane for the Docker Enterprise platform. It is based on Docker Swarm but also integrates the Kubernetes orchestrator. The following is a quick list of its current features:

  • A centralized cluster management interface
  • A cluster resource environment
  • Role-based access control
  • A client environment via WebGUI or the CLI

As we mentioned previously, UCP is based on Docker Swarm orchestration. We will deploy a Docker Swarm cluster with managers and worker roles.

First, we will install a manager node. This will be the leader during the installation process. All the components will be deployed as containers, so we only require a Docker Enterprise Engine to run them.

Once the first manager has been installed, and with all the UCP components up and running, we will continue adding nodes to the cluster. This is a really simple process.

All the components will be managed by a master agent process called ucp-agent. This...