Kubernetes 101

Table of Contents
Preface
	Who is this book for?
	Typographic conventions
	Please help improve this book!
		Current Published Book Version Information
	About the Author
Introduction
	Examples Repository
	Other resources
Chapter 1 - Hello, Kubernetes!
	Kubernetes Origins
	Is Kubernetes Right for You?
	Kubernetes Environments
	Instructions for Minikube
	Building the example Docker image
Chapter 2 - Containers
	Why does Kubernetes use containers?
	Container History: Vendor Wars
		Docker, containerd, and runC
		rkt and CoreOS
		Kubernetes Container Runtime
		CRI-O
		Modern Container Runtime options
	How do you build a container? Docker vs Buildah
	Instructions for `Hello Go' app
	Build the `Hello Go' Docker container image
	Push the container image to a private Docker registry
Chapter 3 - Deploying apps
	Creating a Linode Cluster for cloud-based testing
	Deploying Hello Go into Kubernetes
	Exposing the Hello Go App
	Scaling the Hello Go App
	Updating the Go App
	Rolling back the Deployment
Chapter 4 - Real-world apps
	Installing Drupal on a Traditional LAMP server
		LAMP Server Setup for drupal
	Automating the Installation
	Installing Drupal on Kubernetes using Bitnami's Helm Chart
		Install Helm
		Install the Drupal Chart
		Exposing a LoadBalancer in Minikube
		Changing Chart Options
		Cleaning Up
	Drupal Directly in Kubernetes - Let's Do it [Mostly
		Deploying the Drupal Kubernetes Manifests
Chapter 5 - Scaling Drupal in k8s
	Fixing the scalability issue with Drupal Pods
		Shared Storage Options
		Rook and Ceph
		NFS
	Set up an NFS server
	Reconfigure the Drupal PersistentVolumeClaim for NFS
		Set up NFS client provisioner in K8s
		Deploy Drupal and MySQL (MariaDB)
		Save a File and observe it
	Scale Drupal up… and down!
	Use Horizontal Pod Autoscaling (HPA)
		Set up metrics-server
		Configuring HPA for Drupal
		Testing HPA for Drupal
	Scaling Databases
Chapter 6 - DNS, TLS, Cron, Logging
	Setting things up from Episode 5
	DNS and Ingress setup for Drupal
		Set up an NGINX Ingress Controller
		Set up Ingress for Drupal
		External DNS Integration
	Set up TLS with cert-manager and Let's Encrypt
	Keeping Drupal Happy with a CronJob
	Monitoring Drupal's Logs
		Using an External SaaS Log Aggregator
		Running your own ELK Stack
		Relying on a Service Mesh
		Using your cloud provider's solution
Chapter 7 - Hello, Operator!
	What are Operators?
		The Concept
		The Execution
		Why not use an Operator?
	Popular Kubernetes Operators
	Build your own Operator
		Building an Operator with Operator SDK
		Any language, including Python or Rust!
	Conclusion
Chapter 8 - Kube, Meet Pi
	Heavy Metal Kubernetes
	Start with Training Wheels
		The Raspberry Pi makes for Compact Clusters
		The Raspberry Pi sips energy, and keeps its cool
		The Raspberry Pi teaches lessons about scalability
		ARM is not all sunshine and roses
	Installing a Kubernetes Distribution
		kubeadm
	Setting up the Raspberry Pi Dramble
	Going Further
		Other Guides
Chapter 9 - Secrets and Configuration
Chapter 10 - Monitoring Kubernetes
	Two Clusters to Monitor
	Cluster Visibility with Lens
		Install Lens
		Inspect your clusters with Lens
		Explore Pod Logs
		Log into Nodes and Pods
		Visit web services in a browser
		Manage resources
	Prometheus and Grafana
		Install Prometheus and Grafana using Helm
		Access Grafana
		Grafana Dashboards
		Maintaining Grafana
	Conclusion
Afterword