We have reviewed how publishing will work for our application's components, but should they all be published? The short answer is probably no. Imagine a three-layer application. We will have a middle layer for some kind of backend that will consume a database and should be accessed through a frontend. In a legacy data center, this layered application will probably run each service on a separate node. These nodes will run on different subnets to isolate accesses between them with firewalls. This architecture is quite common. Backend components will be in the middle, between the database and the frontend. The frontend should not access the database. In fact, the database should only be accessible from the backend component. Therefore, should we publish the database component service? The frontend component will access the backend, but do we have to publish the backend component? No, but the frontend should be able to access the backend service...
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.
Related Content you might be interested in
Current Title:
Docker Certified Associate (DCA): Exam Guide
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
Other Books You May Enjoy
Customer Reviews