book

Kubernetes Cookbook

by Sébastien Goasguen, Michael Hausenblas

February 2018

Intermediate to advanced

192 pages

3h 27m

English

O'Reilly Media, Inc.

Read now

Unlock full access

Preface
Who Should Read This BookWhy We Wrote This BookNavigating This BookA Note on Kubernetes ReleasesTechnology You Need to UnderstandOnline ResourcesConventions Used in This BookUsing Code ExamplesO’Reilly SafariHow to Contact UsAcknowledgments
Getting Started with Kubernetes
1.1. Using Kubernetes Without Installation1.2. Installing the Kubernetes CLI, kubectl1.3. Installing Minikube to Run a Local Kubernetes Instance1.4. Using Minikube Locally for Development1.5. Starting Your First Application on Minikube1.6. Accessing the Dashboard in Minikube
Creating a Kubernetes Cluster
2.1. Installing kubeadm to Create a Kubernetes Cluster2.2. Bootstrapping a Kubernetes Cluster Using kubeadm2.3. Downloading a Kubernetes Release from GitHub2.4. Downloading Client and Server Binaries2.5. Using a hyperkube Image to Run a Kubernetes Master Node with Docker2.6. Writing a systemd Unit File to Run Kubernetes Components2.7. Creating a Kubernetes Cluster on Google Kubernetes Engine (GKE)2.8. Creating a Kubernetes Cluster on Azure Container Service (ACS)
Learning to Use the Kubernetes Client
3.1. Listing Resources3.2. Deleting Resources3.3. Watching Resource Changes with kubectl3.4. Editing Resources with kubectl3.5. Asking kubectl to Explain Resources and Fields
Creating and Modifying Fundamental Workloads
4.1. Creating a Deployment Using kubectl run4.2. Creating Objects from File Manifests4.3. Writing a Pod Manifest from Scratch4.4. Launching a Deployment Using a Manifest4.5. Updating a Deployment
Working with Services
5.1. Creating a Service to Expose Your Application5.2. Verifying the DNS Entry of a Service5.3. Changing the Type of a Service5.4. Deploying an Ingress Controller on Minikube5.5. Making Services Accessible from Outside the Cluster
Exploring the Kubernetes API and Key Metadata
6.1. Discovering API Endpoints of the Kubernetes API Server6.2. Understanding the Structure of a Kubernetes Manifest6.3. Creating Namespaces to Avoid Name Collisions6.4. Setting Quotas Within a Namespace6.5. Labeling an Object6.6. Using Labels for Queries6.7. Annotating a Resource with One Command
Managing Specialized Workloads
7.1. Running a Batch Job7.2. Running a Task on a Schedule Within a Pod7.3. Running Infrastructure Daemons per Node7.4. Managing Stateful and Leader/Follower Apps7.5. Influencing Pods’ Startup Behavior
Volumes and Configuration Data
8.1. Exchanging Data Between Containers via a Local Volume8.2. Passing an API Access Key to a Pod Using a Secret8.3. Providing Configuration Data to an Application8.4. Using a Persistent Volume with Minikube8.5. Understanding Data Persistency on Minikube8.6. Dynamically Provisioning Persistent Storage on GKE
Scaling
9.1. Scaling a Deployment9.2. Automatically Resizing a Cluster in GKE9.3. Automatically Resizing a Cluster in AWS9.4. Using Horizontal Pod Autoscaling on GKE

Security
10.1. Providing a Unique Identity for an Application10.2. Listing and Viewing Access Control Information10.3. Controlling Access to Resources10.4. Securing Pods
Monitoring and Logging
11.1. Accessing the Logs of a Container11.2. Recover from a Broken State with a Liveness Probe11.3. Controlling Traffic Flow to a Pod Using a Readiness Probe11.4. Adding Liveness and Readiness Probes to Your Deployments11.5. Enabling Heapster on Minikube to Monitor Resources11.6. Using Prometheus on Minikube11.7. Using Elasticsearch–Fluentd–Kibana (EFK) on Minikube
Maintenance and Troubleshooting
12.1. Enabling Autocomplete for kubectl12.2. Removing a Pod from a Service12.3. Accessing a ClusterIP Service Outside the Cluster12.4. Understanding and Parsing Resource Statuses12.5. Debugging Pods12.6. Getting a Detailed Snapshot of the Cluster State12.7. Adding Kubernetes Worker Nodes12.8. Draining Kubernetes Nodes for Maintenance12.9. Managing etcd
Developing Kubernetes
13.1. Compiling from Source13.2. Compiling a Specific Component13.3. Using a Python Client to Interact with the Kubernetes API13.4. Extending the API Using Custom Resource Definitions (CRDs)
The Ecosystem
14.1. Installing Helm, the Kubernetes Package Manager14.2. Using Helm to Install Applications14.3. Creating Your Own Chart to Package Your Application with Helm14.4. Converting Your Docker Compose Files to Kubernetes Manifests14.5. Creating a Kubernetes Cluster with kubicorn14.6. Storing Encrypted Secrets in Version Control14.7. Deploying Functions with kubeless
Resources
GeneralTutorials and Examples
Index

Content preview from Kubernetes Cookbook

Chapter 1. Getting Started with Kubernetes

In this first chapter we present recipes that will help you get started with Kubernetes. We show you how to use Kubernetes without installing it and introduce components such as the command-line interface (CLI) and the dashboard, which allow you to interact with a cluster, as well as Minikube, an all-in-one solution you can run on your laptop.

1.1 Using Kubernetes Without Installation

Problem

You want to try Kubernetes without installing it.

Solution

To use Kubernetes without installing it, follow the interactive tutorial on the Kubernetes website.

You can also use the Kubernetes playground on Katacoda. Once you’re signed in with GitHub or one of the social media authentication methods, you will see the page depicted in Figure 1-1.

Screen shot of the Katacoda Kubernetes playground

Note that an environment you launch in the playground is only available for a limited time—currently one hour—but it’s free of charge and all you need is a browser.

1.2 Installing the Kubernetes CLI, kubectl

Problem

You want to install the Kubernetes command-line interface so you can interact with your Kubernetes cluster.

Solution

Install kubectl in one of the following ways:

Download the source tarballs.
Use a package manager.
Build from source (see Recipe 13.1).

The documentation highlights a few mechanisms to get kubectl. The ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.

Julian F.

Head of Cybersecurity

I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.

Addison B.

Field Engineer

I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.

Amir M.

Data Platform Tech Lead

I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.

Mark W.

Embedded Software Engineer

Publisher Resources

ISBN: 9781491979679Errata Page

Cloud Computing

Data Engineering

Data Science

AI & ML

Programming Languages

Software Architecture

IT/Ops

Security

Design

Business

Soft Skills

Kubernetes Cookbook

by Sébastien Goasguen, Michael Hausenblas

Chapter 1. Getting Started with Kubernetes

1.1 Using Kubernetes Without Installation

Problem

Solution

Figure 1-1. Screenshot of the Katacoda Kubernetes playground

1.2 Installing the Kubernetes CLI, kubectl

Problem

Solution

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.