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Kubernetes Network Policies and Service Meshes Lab

This repository contains materials for a hands-on lab exploring Kubernetes Network Policies and Service Meshes. The lab is designed to provide practical experience with these essential technologies for improving network security and service communication in Kubernetes environments.

Table of Contents

  1. Introduction
  2. Lab Environment Setup
  3. Part 1: Kubernetes Network Policies
  4. Part 2: Service Mesh with Bookinfo Application
  5. Comparison of Network Policies and Service Meshes
  6. Troubleshooting

Introduction

This lab aims to provide hands-on experience with:

  • Implementing and testing Kubernetes Network Policies to control pod communication
  • Deploying and configuring Istio as a Service Mesh
  • Applying traffic management using Istio's Virtual Services and Destination Rules
  • Implementing mutual TLS (mTLS) between services
  • Using observability tools like Kiali, Grafana, and Jaeger in Istio
  • Understanding the different use cases for Network Policies and Service Meshes

Lab Environment Setup

The lab environment requires:

  • Docker
  • Minikube with Cilium CNI
  • Kubectl
  • Istio

Detailed setup instructions are provided in the lab document.

Part 1: Kubernetes Network Policies

This section covers:

  • Default behavior of pod-to-pod communication
  • Creating basic ingress deny-all policies
  • Allowing ingress traffic from specific pods
  • Implementing egress policies

Part 2: Service Mesh with Bookinfo Application

This section explores:

  • Installing and configuring Istio
  • Deploying the Bookinfo sample application
  • Implementing traffic management with Virtual Services and Destination Rules
  • Enabling mutual TLS (mTLS) authentication
  • Using observability tools (Kiali, Grafana, Jaeger)

Comparison of Network Policies and Service Meshes

The lab provides a comparison of Network Policies and Service Meshes, discussing their pros and cons, and best practices for their use.

Troubleshooting

The lab includes a section on troubleshooting, providing useful commands and strategies for diagnosing issues in Kubernetes, Network Policies, and Service Meshes.

Resources

  • Lab document (PDF)
  • YAML files for various configurations used in the lab

Note

This lab is designed for educational purposes and may require significant system resources, particularly when running Istio. It's recommended to have at least 16GB of RAM for optimal performance.