- a and b: Kubernetes requires etcd to work. Most of the Kubernetes deployment solutions will deploy etcd for you, but it is an external application and therefore it is up to you to manage and ensure that the key-value solution provides high availability. Kubernetes internal networking will work out of the box, but communications between components deployed on different hosts rely on external plugins (the CNI standard). Therefore, we will need to choose and deploy ourselves a solution to provide this kind of communication.
- b and c: We will deploy pods in Kubernetes, hence these are the minimum unit of deployment. We can deploy more than one container in a pod. The container density is higher in Kubernetes. Scaling pods will replicate all their components at once.
- d: All sentences are true. All containers in a pod share the same IP address and localhost. They also share pod volumes. Container Network Interface (CNI) is not required for connections between pods running on the same...
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Docker Certified Associate (DCA): Exam Guide
By :
Docker Certified Associate (DCA): Exam Guide
By:
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)
Preface
Section 1 - Key Container Concepts
Free Chapter
Modern Infrastructures and Applications with Docker
Building Docker Images
Running Docker Containers
Container Persistency and Networking
Deploying Multi-Container Applications
Introduction to Docker Content Trust
Section 2 - Container Orchestration
Introduction to Orchestration
Orchestration Using Docker Swarm
Orchestration Using Kubernetes
Section 3 - Docker Enterprise
Introduction to the Docker Enterprise Platform
Universal Control Plane
Publishing Applications in Docker Enterprise
Implementing an Enterprise-Grade Registry with DTR
Section 4 - Preparing for the Docker Certified Associate Exam
Summarizing Important Concepts
Mock Exam Questions and Final Notes
Assessments
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