You're reading from The Ultimate Docker Container Book Build, test, ship, and run containers with Docker and Kubernetes

Product type Paperback

Published in Aug 2023

Publisher Packt

ISBN-13 9781804613986

Length 626 pages

Edition 3rd Edition

Tools

Docker

Concepts

DevOps

Author (1):

Dr. Gabriel N. Schenker

View More author details

Table of Contents (26) Chapters

Preface

1. Part 1:Introduction

2. Chapter 1: What Are Containers and Why Should I Use Them? FREE CHAPTER

3. Chapter 2: Setting Up a Working Environment

4. Part 2:Containerization Fundamentals

5. Chapter 3: Mastering Containers

6. Chapter 4: Creating and Managing Container Images

7. Chapter 5: Data Volumes and Configuration

8. Chapter 6: Debugging Code Running in Containers

9. Chapter 7: Testing Applications Running in Containers

10. Chapter 8: Increasing Productivity with Docker Tips and Tricks

11. Part 3:Orchestration Fundamentals

12. Chapter 9: Learning about Distributed Application Architecture

13. Chapter 10: Using Single-Host Networking

14. Chapter 11: Managing Containers with Docker Compose

15. Chapter 12: Shipping Logs and Monitoring Containers

16. Chapter 13: Introducing Container Orchestration

17. Chapter 14: Introducing Docker Swarm

18. Chapter 15: Deploying and Running a Distributed Application on Docker Swarm

19. Part 4:Docker, Kubernetes, and the Cloud

20. Chapter 16: Introducing Kubernetes

21. Chapter 17: Deploying, Updating, and Securing an Application with Kubernetes

22. Chapter 18: Running a Containerized Application in the Cloud

23. Chapter 19: Monitoring and Troubleshooting an Application Running in Production

24. Index

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Kubernetes master nodes

Kubernetes master nodes are used to manage a Kubernetes cluster. The following is a high-level diagram of such a master:

Figure 16.2 – Kubernetes master

At the bottom of the preceding diagram, we have the infrastructure, which can be a VM on-premises or in the cloud or a server (often called bare metal) on-premises or in the cloud.

Currently, Kubernetes masters only run on Linux. The most popular Linux distributions, such as RHEL, CentOS, and Ubuntu, are supported. On this Linux machine, we have at least the following four Kubernetes services running:

API Server: This is the gateway to Kubernetes. All requests to list, create, modify, or delete any resources in the cluster must go through this service. It exposes a REST interface that tools such as kubectl use to manage the cluster and applications in the cluster.
Controller: The controller, or more precisely the controller manager, is a control loop that observes...