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

Chapter 11

  1. b: As we have learned, Docker Enterprise Engine is required to install UCP. It will not be installed automatically for us. We can use Web UI, the UCP bundle, and the UCP API to manage our workloads and cluster configurations. UCP's RBAC system will manage authorizations, but it is true that it will also authenticate users if no external authorization source is configured or it is not available.
  2. b and d: Docker provides a complete UCP backup and restore solution with the docker/ucp image, but remember that we should take care of Docker Swarm's filesystem because it is not part of UCP's backup. We should use the appropriate docker/ucp image release for our environment. In fact, we will use the same installed release for any action other than upgrading. UCP removal can be executed from the docker/ucp image and this will remove UCP components from all nodes in the cluster. We should then remove the docker/ucp image. The upgrade process can be achieved automatically...