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 10

  1. c: Docker Machine is maintained by the Docker community.
  2. a: Docker Enterprise provides a supported and enterprise-ready CaaS platform, with supported Kubernetes, Universal Control Plane (UCP), and Docker Trusted Registry (DTR, based on the Docker Registry community). We can deploy Docker Swarm in production even with Docker support using Docker Enterprise Engine.
  3. a, b, and d: Docker Enterprise provides Kubernetes out of the box when we deploy UCP – we do not need to install Kubernetes manually.
  1. d: We will use fixed IP addresses for all components. We will use an external load balancer to forward traffic to all manager nodes for UCP and all worker nodes with DTR running for the registry. Forwarding traffic to just one node will not provide high availability if it fails. The Docker UCP installation will deploy Calico by default for Kubernetes, but we will need to review pod-cidr and service-cidr to ensure that the subnets defined by default will be valid in our environment...