If you have been paying attention, then you might have noticed something interesting in the last section. We had the pets application deployed and it resulted in the fact that an instance of the web service was installed on the three nodes, node-1, node-2, and node-3. Yet, we were able to access the web service on node-1 with localhost and we reached each container from there. How is that possible? Well, this is due to the so-called Swarm routing mesh. The routing mesh makes sure that when we publish a port of a service; that port is then published on all nodes of the Swarm. Hence, network traffic that hits any node of the Swarm and requests to use a specific port will be forwarded to one of the service containers by the routing mesh. Let's look at the following diagram to see how...
Learn Docker - Fundamentals of Docker 19.x - Second Edition
By :
Learn Docker - Fundamentals of Docker 19.x - Second Edition
By:
Overview of this book
Containers enable you to package an application with all the components it needs, such as libraries and other dependencies, and ship it as one package. Docker containers have revolutionized the software supply chain in both small and large enterprises.
Starting with an introduction to Docker fundamentals and setting up an environment to work with it, you’ll delve into concepts such as Docker containers, Docker images, and Docker Compose. As you progress, the book will help you explore deployment, orchestration, networking, and security. Finally, you’ll get to grips with Docker functionalities on public clouds such as Amazon Web Services (AWS), Azure, and Google Cloud Platform (GCP), and learn about Docker Enterprise Edition features. Additionally, you’ll also discover the benefits of increased security with the use of containers.
By the end of this Docker book, you’ll be able to build, ship, and run a containerized, highly distributed application on Docker Swarm or Kubernetes, running on-premises or in the cloud.
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Current Title:
Learn Docker - Fundamentals of Docker 19.x - Second Edition
Table of Contents (25 chapters)
Preface
Section 1: Motivation and Getting Started
Free Chapter
What Are Containers and Why Should I Use Them?
Setting Up a Working Environment
Section 2: Containerization, from Beginner to Black Belt
Mastering Containers
Creating and Managing Container Images
Data Volumes and Configuration
Debugging Code Running in Containers
Using Docker to Supercharge Automation
Advanced Docker Usage Scenarios
Section 3: Orchestration Fundamentals and Docker Swarm
Distributed Application Architecture
Single-Host Networking
Docker Compose
Orchestrators
Introduction to Docker Swarm
Zero-Downtime Deployments and Secrets
Section 4: Docker, Kubernetes, and the Cloud
Introduction to Kubernetes
Deploying, Updating, and Securing an Application with Kubernetes
Monitoring and Troubleshooting an App Running in Production
Running a Containerized App in the Cloud
Assessments
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Customer Reviews