Module 8: Advanced Topics and Real-World Patterns

Overview

Congratulations on reaching the final module! Now that you can build production-ready operators (Module 7), it’s time to explore advanced topics and real-world patterns. This module covers multi-tenancy, operator composition, stateful application management, and best practices from popular operators.

Duration: 6-7 hours
Prerequisites:

  • Completion of all previous modules (Modules 1-7)
  • Production-ready operator from Module 7
  • Understanding of advanced Kubernetes concepts

Learning Objectives

By the end of this module, you will:

  • Build cluster-scoped and multi-tenant operators
  • Compose multiple operators together
  • Manage stateful applications with backups and migrations
  • Understand real-world operator patterns
  • Apply best practices from popular operators

Module Structure

  1. Lesson 8.1: Multi-Tenancy and Namespace Isolation
  2. Lesson 8.2: Operator Composition
  3. Lesson 8.3: Stateful Application Management
  4. Lesson 8.4: Real-World Patterns and Best Practices

Prerequisites Check

Before starting, ensure you’ve completed:

  • ✅ Module 7: Production-ready operator
  • ✅ Have a working operator with all features
  • ✅ Understand production deployment
  • ✅ Ready for advanced topics

If you haven’t completed Module 7, start with Module 7: Production Considerations.

What You’ll Build

Throughout this module, you’ll extend your Database operator with:

  • A new cluster-scoped ClusterDatabase API for multi-tenant support
  • Backup and restore functionality
  • Advanced stateful application patterns
  • Real-world best practices

Setup

Before starting this module:

  1. Have your production-ready operator from Module 7:
    • Should be packaged and deployed
    • Should have HA and security configured
    • Ready for advanced features
  2. Ensure development environment is ready: 
    ./scripts/setup-dev-environment.sh
  3. Have a kind cluster running: 
    ./scripts/setup-kind-cluster.sh

Hands-on Labs

Each lesson includes hands-on exercises that add advanced features to your operator.

Solutions

Complete working solutions for all labs are available in the solutions directory:

Lab 8.1 Solutions - Multi-Tenant Operator

Lab 8.2 Solutions - Operator Composition

Lab 8.3 Solutions - Stateful Application Management

Lab 8.4 Solutions - Final Project