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 Kubernetes using Docker Engine

Kubernetes has many features and is more complex than Docker Swarm. It provides additional features not available on Docker Swarm without having to modify our application code. Docker Swarm is more aligned with microservices logic, while Kubernetes is closer to the virtual machine application's lift and shift approach (move application as is to a new infrastructure). This is because the Kubernetes pod object can be compared to virtual machines (with application processes running as containers inside a pod).

Before we begin discussing Kubernetes architecture, let's review some of the concepts that we've learned about orchestration.

Orchestration should provide all that's required for deploying a solution to execute, manage, and publish applications based on the containers distributed on a pool of nodes. Therefore, it should provide a control plane to ensure cluster availability, a scheduler for deploying applications, and a network...