Networking Introduction

Hello, and welcome to this comprehensive lesson on Kubernetes networking. I’m Mumshad Mannambeth, and in this article, we’ll explore the essential networking concepts that form the backbone of Kubernetes architecture.

Overview

Before diving into the specifics of Kubernetes networking, it’s important to have a solid understanding of basic networking concepts such as IP configuration, gateways, routes, and DNS fundamentals. This lesson builds on those fundamentals to help you understand how Kubernetes handles networking for its clusters, pods, and services.

Prerequisite Lectures

To ensure you are well-prepared, we have developed a series of prerequisite lectures that cover the following topics:

• Configuring interfaces and assigning IP addresses
• Setting up gateways and routing tables
• Fundamental principles of name resolution and DNS configuration on Linux systems
• An introduction to CoreDNS and its role in DNS management

What’s Next?

After completing the prerequisite lectures, we will delve into Kubernetes networking with the following sequence:

1. Cluster Networking Requirements: Understand the overall network structure of a Kubernetes cluster.
2. Pod Networking Concepts: Explore how pods communicate within the cluster.
3. Container Network Interface (CNI): Learn how the CNI framework addresses pod networking challenges, leveraging the concepts of network namespaces from the prerequisites.
4. Cluster DNS: Examine how Kubernetes implements DNS internally for service discovery.
5. Ingress Networking: Discover the intricacies of ingress networking, a topic that I have dedicated considerable time to and which is fundamental for managing external access to services.

Visual Aids

Additional Resources

For more detailed information on Kubernetes networking concepts, consider exploring the following resources:

• Kubernetes Basics
• Kubernetes Documentation
• Docker Hub
• Terraform Registry

By following this lesson structure, you'll be well-equipped to understand and implement Kubernetes networking in your environments. Enjoy your journey into the world of Kubernetes networking!