Kubernetes 101

Description

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