Kubernetes Cookbook: Building Cloud Native Applications

✍ Scribed by Sameer Naik, Sébastien Goasguen, Jonathan Michaux

• Publisher: O'Reilly Media
• Year: 2023
• Tongue: English
• Leaves: 231
• Edition: 2
• Category: Library

✦ Synopsis

Kubernetes is the de facto standard for container orchestration and distributed applications management across a microservices framework. With this practical cookbook, you'll learn hands-on Kubernetes recipes for automating the deployment, scaling, and operations of application containers across clusters of hosts.

In this fully updated second edition, Sameer Naik, Sébastien Goasguen, and Jonathan Michaux from TriggerMesh provide a problem-solution-discussion format with easy lookups to help you find the detailed answers you need—fast. Kubernetes lets you deploy your applications quickly and predictably, so you can efficiently respond to customer demand. This cookbook delivers the essential knowledge that developers and system administrators need to get there.

Recipes in this cookbook focus on:

• Creating a Kubernetes cluster
• Using the Kubernetes command-line interface
• Managing fundamental workload types
• Working with services
• Exploring the Kubernetes API
• Managing stateful and non-cloud-native apps
• Working with volumes and configuration data
• Cluster-level and application-level scaling
• Securing your applications
• Monitoring and logging
• Maintenance and troubleshooting

✦ Table of Contents

Cover
Copyright
Table of Contents
Preface
Who Should Read This Book
Why We Wrote This Book
Navigating This Book
A Note on Kubernetes Releases
Technology You Need to Understand
Conventions Used in This Book
Using Code Examples
O’Reilly Online Learning
How to Contact Us
Acknowledgments
Chapter 1. Getting Started with Kubernetes
1.1 Installing the Kubernetes CLI, kubectl
Problem
Solution
Discussion
See Also
1.2 Installing Minikube to Run a Local Kubernetes Instance
Problem
Solution
Discussion
See Also
1.3 Using Minikube Locally for Development
Problem
Solution
Discussion
1.4 Starting Your First Application on Minikube
Problem
Solution
Discussion
1.5 Using kind to Run Kubernetes Locally
Problem
Solution
Discussion
See Also
1.6 Using Kubernetes in Docker Desktop
Problem
Solution
Discussion
1.7 Switching kubectl Contexts
Problem
Solution
Discussion
1.8 Switching Contexts and Namespaces Using kubectx and kubens
Problem
Solution
See Also
Chapter 2. Creating a Kubernetes Cluster
2.1 Preparing a New Node for a Kubernetes Cluster
Problem
Solution
Discussion
2.2 Bootstrapping a Kubernetes Control-Plane Node
Problem
Solution
Discussion
See Also
2.3 Installing a Container Network Add-on for Cluster Networking
Problem
Solution
Discussion
2.4 Adding Worker Nodes to a Kubernetes Cluster
Problem
Solution
Discussion
2.5 Deploying the Kubernetes Dashboard
Problem
Solution
2.6 Accessing the Kubernetes Dashboard
Problem
Solution
Discussion
2.7 Deploying the Kubernetes Metrics Server
Problem
Solution
Discussion
See Also
2.8 Downloading a Kubernetes Release from GitHub
Problem
Solution
Discussion
2.9 Downloading Client and Server Binaries
Problem
Solution
Discussion
2.10 Using systemd Unit Files for Running Kubernetes Components
Problem
Solution
Discussion
See Also
2.11 Creating a Kubernetes Cluster on Google Kubernetes Engine
Problem
Solution
Discussion
See Also
2.12 Creating a Kubernetes Cluster on Azure Kubernetes Service
Problem
Solution
See Also
2.13 Creating a Kubernetes Cluster on Amazon Elastic Kubernetes Service
Problem
Solution
See Also
Chapter 3. Learning to Use the Kubernetes Client
3.1 Listing Resources
Problem
Solution
Discussion
3.2 Deleting Resources
Problem
Solution
Discussion
3.3 Watching Resource Changes with kubectl
Problem
Solution
Discussion
3.4 Editing Objects with kubectl
Problem
Solution
Discussion
3.5 Asking kubectl to Explain Resources and Fields
Problem
Solution
Discussion
See Also
Chapter 4. Creating and Modifying Fundamental Workloads
4.1 Creating a Pod Using kubectl run
Problem
Solution
Discussion
4.2 Creating a Deployment Using kubectl create
Problem
Solution
Discussion
4.3 Creating Objects from File Manifests
Problem
Solution
Discussion
4.4 Writing a Pod Manifest from Scratch
Problem
Solution
Discussion
4.5 Launching a Deployment Using a Manifest
Problem
Solution
Discussion
See Also
4.6 Updating a Deployment
Problem
Solution
4.7 Running a Batch Job
Problem
Solution
Discussion
4.8 Running a Task on a Schedule Within a Pod
Problem
Solution
Discussion
See Also
4.9 Running Infrastructure Daemons per Node
Problem
Solution
Discussion
Chapter 5. Working with Services
5.1 Creating a Service to Expose Your Application
Problem
Solution
Discussion
See Also
5.2 Verifying the DNS Entry of a Service
Problem
Solution
Discussion
5.3 Changing the Type of a Service
Problem
Solution
Discussion
See Also
5.4 Deploying an Ingress Controller
Problem
Solution
Discussion
See Also
5.5 Making Services Accessible from Outside the Cluster
Problem
Solution
Discussion
See Also
Chapter 6. Managing Application Manifests
6.1 Installing Helm, the Kubernetes Package Manager
Problem
Solution
Discussion
6.2 Adding Chart Repositories to Helm
Problem
Solution
Discussion
6.3 Using Helm to Install Applications
Problem
Solution
Discussion
6.4 Inspecting the Customizable Parameters of a Chart
Problem
Solution
Discussion
6.5 Overriding Chart Parameters
Problem
Solution
Discussion
6.6 Getting the User-Supplied Parameters of a Helm Release
Problem
Solution
Discussion
6.7 Uninstalling Applications with Helm
Problem
Solution
6.8 Creating Your Own Chart to Package Your Application with Helm
Problem
Solution
Discussion
See Also
6.9 Installing Kompose
Problem
Solution
6.10 Converting Your Docker Compose Files to Kubernetes Manifests
Problem
Solution
Discussion
6.11 Converting Your Docker Compose File to a Helm Chart
Problem
Solution
6.12 Installing kapp
Problem
Solution
Discussion
6.13 Deploying YAML Manifests Using kapp
Problem
Solution
Discussion
Chapter 7. Exploring the Kubernetes API and Key Metadata
7.1 Discovering the Kubernetes API Server’s Endpoints
Problem
Solution
Discussion
See Also
7.2 Understanding the Structure of a Kubernetes Manifest
Problem
Solution
Discussion
See Also
7.3 Creating Namespaces to Avoid Name Collisions
Problem
Solution
Discussion
7.4 Setting Quotas Within a Namespace
Problem
Solution
Discussion
See Also
7.5 Labeling an Object
Problem
Solution
Discussion
7.6 Using Labels for Queries
Problem
Solution
Discussion
See Also
7.7 Annotating a Resource with One Command
Problem
Solution
Discussion
Chapter 8. Volumes and Configuration Data
8.1 Exchanging Data Between Containers via a Local Volume
Problem
Solution
Discussion
See Also
8.2 Passing an API Access Key to a Pod Using a Secret
Problem
Solution
Discussion
See Also
8.3 Providing Configuration Data to an Application
Problem
Solution
Discussion
See Also
8.4 Using a Persistent Volume with Minikube
Problem
Solution
Discussion
See Also
8.5 Understanding Data Persistency on Minikube
Problem
Solution
Discussion
See Also
8.6 Storing Encrypted Secrets in Version Control
Problem
Solution
Discussion
See Also
Chapter 9. Scaling
9.1 Scaling a Deployment
Problem
Solution
9.2 Using Horizontal Pod Autoscaling
Problem
Solution
See Also
9.3 Automatically Resizing a Cluster in GKE
Problem
Solution
Discussion
See Also
9.4 Automatically Resizing an Amazon EKS Cluster
Problem
Solution
Chapter 10. Security
10.1 Providing a Unique Identity for an Application
Problem
Solution
Discussion
See Also
10.2 Listing and Viewing Access Control Information
Problem
Solution
Discussion
See Also
10.3 Controlling Access to Resources
Problem
Solution
Discussion
See Also
10.4 Securing Pods
Problem
Solution
Discussion
See Also
Chapter 11. Monitoring and Logging
11.1 Accessing the Logs of a Container
Problem
Solution
Discussion
11.2 Recovering from a Broken State with a Liveness Probe
Problem
Solution
See Also
11.3 Controlling Traffic Flow to a Pod Using a Readiness Probe
Problem
Solution
Discussion
See Also
11.4 Protecting Slow-Starting Containers Using a Start-up Probe
Problem
Solution
Discussion
See Also
11.5 Adding Liveness and Readiness Probes to Your Deployments
Problem
Solution
Discussion
See Also
11.6 Accessing Kubernetes Metrics in the CLI
Problem
Solution
11.7 Using Prometheus and Grafana on Minikube
Problem
Solution
Discussion
See Also
Chapter 12. Maintenance and Troubleshooting
12.1 Enabling Autocomplete for kubectl
Problem
Solution
Discussion
See Also
12.2 Removing a Pod from a Service
Problem
Solution
12.3 Accessing a ClusterIP Service Outside the Cluster
Problem
Solution
Discussion
12.4 Understanding and Parsing Resource Statuses
Problem
Solution
Discussion
See Also
12.5 Debugging Pods
Problem
Solution
Discussion
See Also
12.6 Influencing a Pod’s Start-up Behavior
Problem
Solution
Discussion
12.7 Getting a Detailed Snapshot of the Cluster State
Problem
Solution
12.8 Adding Kubernetes Worker Nodes
Problem
Solution
Discussion
See Also
12.9 Draining Kubernetes Nodes for Maintenance
Problem
Solution
Discussion
See Also
Chapter 13. Service Meshes
13.1 Installing the Istio Service Mesh
Problem
Solution
Discussion
See Also
13.2 Deploying a Microservice with an Istio Sidecar
Problem
Solution
Discussion
See Also
13.3 Routing Traffic Using an Istio Virtual Service
Problem
Solution
Discussion
See Also
13.4 Rewriting a URL Using an Istio Virtual Service
Problem
Solution
Discussion
See Also
13.5 Installing the Linkerd Service Mesh
Problem
Solution
Discussion
See Also
13.6 Deploying a Service into the Linkerd Mesh
Problem
Solution
Discussion
See Also
13.7 Routing Traffic to a Service in Linkerd
Problem
Solution
Discussion
13.8 Authorizing Traffic to the Server in Linkerd
Problem
Solution
Discussion
See Also
Chapter 14. Serverless and Event-Driven Applications
14.1 Installing the Knative Operator
Problem
Solution
Discussion
14.2 Installing the Knative Serving Component
Problem
Solution
Discussion
See Also
14.3 Installing the Knative CLI
Problem
Solution
Discussion
14.4 Creating a Knative Service
Problem
Solution
Discussion
14.5 Installing the Knative Eventing Component
Problem
Solution
Discussion
14.6 Deploying a Knative Eventing Source
Problem
Solution
Discussion
14.7 Enabling Knative Eventing Sources
Problem
Solution
Discussion
14.8 Installing Event Sources from TriggerMesh
Problem
Solution
Discussion
See Also
Chapter 15. Extending Kubernetes
15.1 Compiling from Source
Problem
Solution
See Also
15.2 Compiling a Specific Component
Problem
Solution
15.3 Using a Python Client to Interact with the Kubernetes API
Problem
Solution
Discussion
See Also
15.4 Extending the API Using Custom Resource Definitions
Problem
Solution
Discussion
See Also
Appendix A. Resources
General
Tutorials and Examples
Index
About the Authors