Kubernetes 101

Preface

1. Who is this book for?
2. Typographic conventions
3. Please help improve this book!
4. Current Published Book Version Information
5. About the Author

Introduction

1. Examples Repository
2. Other resources

Chapter 1 - Hello, Kubernetes!

1. Kubernetes Origins
2. Is Kubernetes Right for You?
3. Kubernetes Environments
4. Instructions for Minikube
5. Building the example Docker image

Chapter 2 - Containers

1. Why does Kubernetes use containers?
2. Container History: Vendor Wars
3. Docker, containerd, and runC
4. rkt and CoreOS
5. Kubernetes Container Runtime
6. CRI-O
7. Modern Container Runtime options
8. How do you build a container? Docker vs Buildah
9. Instructions for ‘Hello Go’ app
10. Build the ‘Hello Go’ Docker container image
11. Push the container image to a private Docker registry

Chapter 3 - Deploying apps

1. Creating a Linode Cluster for cloud-based testing
2. Deploying Hello Go into Kubernetes
3. Exposing the Hello Go App
4. Scaling the Hello Go App
5. Updating the Go App
6. Rolling back the Deployment

Chapter 4 - Real-world apps

1. Installing Drupal on a Traditional LAMP server
2. LAMP Server Setup for drupal
3. Automating the Installation
4. Installing Drupal on Kubernetes using Bitnami’s Helm Chart
5. Install Helm
6. Install the Drupal Chart
7. Exposing a LoadBalancer in Minikube
8. Changing Chart Options
9. Cleaning Up
10. Drupal Directly in Kubernetes - Let’s Do it [Mostly] Right!
11. Deploying the Drupal Kubernetes Manifests

Chapter 5 - Scaling Drupal in k8s

1. Fixing the scalability issue with Drupal Pods
2. Shared Storage Options
3. Rook and Ceph
4. NFS
5. Set up an NFS server
6. Reconfigure the Drupal PersistentVolumeClaim for NFS
7. Set up NFS client provisioner in K8s
8. Deploy Drupal and MySQL (MariaDB)
9. Save a File and observe it
10. Scale Drupal up… and down!
11. Use Horizontal Pod Autoscaling (HPA)
12. Set up metrics-server
13. Configuring HPA for Drupal
14. Testing HPA for Drupal
15. Scaling Databases

Chapter 6 - DNS, TLS, Cron, Logging

1. Setting things up from Episode 5
2. DNS and Ingress setup for Drupal
3. Set up an NGINX Ingress Controller
4. Set up Ingress for Drupal
5. External DNS Integration
6. Set up TLS with cert-manager and Let’s Encrypt
7. Keeping Drupal Happy with a CronJob
8. Monitoring Drupal’s Logs
9. Using an External SaaS Log Aggregator
10. Running your own ELK Stack
11. Relying on a Service Mesh
12. Using your cloud provider’s solution

Chapter 7 - Hello, Operator!

1. What are Operators?
2. The Concept
3. The Execution
4. Why not use an Operator?
5. Popular Kubernetes Operators
6. Build your own Operator
7. Building an Operator with Operator SDK
8. Any language, including Python or Rust!
9. Conclusion

Chapter 8 - Kube, Meet Pi

1. Heavy Metal Kubernetes
2. Start with Training Wheels
3. The Raspberry Pi makes for Compact Clusters
4. The Raspberry Pi sips energy, and keeps its cool
5. The Raspberry Pi teaches lessons about scalability
6. ARM is not all sunshine and roses
7. Installing a Kubernetes Distribution
8. kubeadm
9. Setting up the Raspberry Pi Dramble
10. Going Further
11. Other Guides

Chapter 9 - Secrets and Configuration

Chapter 10 - Monitoring Kubernetes

1. Two Clusters to Monitor
2. Cluster Visibility with Lens
3. Install Lens
4. Inspect your clusters with Lens
5. Explore Pod Logs
6. Log into Nodes and Pods
7. Visit web services in a browser
8. Manage resources
9. Prometheus and Grafana
10. Install Prometheus and Grafana using Helm
11. Access Grafana
12. Grafana Dashboards
13. Maintaining Grafana
14. Conclusion

Afterword