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Hands-On Kubernetes on Azure
Hands-On Kubernetes on Azure

Hands-On Kubernetes on Azure: Automate management, scaling, and deployment of containerized applications , Second Edition

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Profile Icon Nills Franssens Profile Icon Lenz Profile Icon Gopalakrishnan
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Paperback May 2020 368 pages 2nd Edition
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Arrow left icon
Profile Icon Nills Franssens Profile Icon Lenz Profile Icon Gopalakrishnan
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€36.99
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Paperback May 2020 368 pages 2nd Edition
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Hands-On Kubernetes on Azure

1. Introduction to Docker and Kubernetes

Kubernetes has become the leading standard in container orchestration. Since its inception in 2014, it has gained tremendous popularity. It has been adopted by start-ups as well as major enterprises, and the major public cloud vendors all offer a managed Kubernetes service.

Kubernetes builds upon the success of the Docker container revolution. Docker is both a company and the name of a technology. Docker as a technology is the standard way of creating and running software containers, often called Docker containers. A container itself is a way of packaging software that makes it easy to run that software on any platform, ranging from your laptop to a server in a data center, to a cluster running in the public cloud.

Docker is also the name of the company behind the Docker technology. Although the core technology is open source, the Docker company focuses on reducing complexity for developers through a number of commercial offerings...

The software evolution that brought us here

There are two major software development evolutions that enabled the popularity of Docker and Kubernetes. One is the adoption of a microservices architectural style. Microservices allow an application to be built from a collection of small services that each serve a specific function. The other evolution that enabled Docker and Kubernetes is DevOps. DevOps is a set of cultural practices that allows people, processes, and tools to build and release software faster, more frequently, and more reliably.

Although you can use both Docker and Kubernetes without using either microservices or DevOps, the technologies are most widely adopted for deploying microservices using DevOps methodologies.

In this section, we'll discuss both evolutions, starting with microservices.

Microservices

Software development has drastically evolved over time. Initially, software was developed and run on a single system, typically a mainframe. A client...

Fundamentals of Docker containers

A form of container technology has existed in the Linux kernel since the 1970s. The technology powering today's containers, called cgroups, was introduced into the Linux kernel in 2006 by Google. The Docker company popularized the technology in 2013 by introducing an easy developer workflow. The company gave its name to the technology, so the name Docker can refer to both the company as well as the technology. Most commonly though, we use Docker to refer to the technology.

Docker as a technology is both a packaging format and a container runtime. We refer to packaging as an architecture that allows an application to be packaged together with its dependencies, such as binaries and runtime. The runtime points at the actual process of running the container images.

You can experiment with Docker by creating a free Docker account at Docker Hub (https://hub.docker.com/) and using that login to open Docker Labs (https://labs.play-with-docker.com...

Kubernetes as a container orchestration platform

Building and running a single container seems easy enough. However, things can get complicated when you need to run multiple containers across multiple servers. This is where a container orchestrator can help. A container orchestrator takes care of scheduling containers to be run on servers, restarting containers when they fail, moving containers to a new host when that host becomes unhealthy, and much more.

The current leading orchestration platform is Kubernetes (https://kubernetes.io/). Kubernetes was inspired by the Borg project in Google, which, by itself, was running millions of containers in production.

Kubernetes takes a declarative approach to orchestration; that is, you specify what you need and Kubernetes takes care of deploying the workload you specified. You don't need to start these containers manually yourself anymore, as Kubernetes will launch the Docker containers you specified.

Note

Although Kubernetes...

Azure Kubernetes Service

Azure Kubernetes Service (AKS) makes creating and managing Kubernetes clusters easier.

A typical Kubernetes cluster consists of a number of master nodes and a number of worker nodes. A node within Kubernetes is equivalent to a virtual machine (VM). The master nodes contain the Kubernetes API and a database that contains the cluster state. The worker nodes are the VMs that run your actual workload.

AKS makes it a lot easier to create a cluster. When you create an AKS cluster, AKS sets up the Kubernetes master for you, free of charge. AKS will then create VMs in your subscription, and turn those VMs into worker nodes of your Kubernetes cluster in your network. You only pay for those VMs; you don't pay for the master.

Within AKS, Kubernetes Services are integrated with Azure Load Balancer and Kubernetes Ingresses are integrated with the application gateway. Azure Load Balancer is a layer-4 network load balancer Service; the application gateway is...

Summary

In this chapter, we introduced the concepts of Docker and Kubernetes. We ran a number of containers, starting with an existing image and then using an image we built ourselves. After that demo, we explored three essential Kubernetes objects: the Pod, the Deployment, and the Service.

This provides the common context for the remaining chapters, where you will deploy Dockerized applications in Microsoft AKS. You will see how the AKS Platform as a Service (PaaS) offering from Microsoft streamlines Deployment by handling many of the management and operational tasks that you would have to do yourself if you managed and operated your own Kubernetes infrastructure.

In the next chapter, we will introduce the Azure portal and its components in the context of creating your first AKS cluster.

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Key benefits

  • Understand the fundamentals of Docker and Kubernetes
  • Learn to implement microservices architecture using the Kubernetes platform
  • Discover how you can scale your application workloads in Azure Kubernetes Service (AKS)

Description

From managing versioning efficiently to improving security and portability, technologies such as Kubernetes and Docker have greatly helped cloud deployments and application development. Starting with an introduction to Docker, Kubernetes, and Azure Kubernetes Service (AKS), this book will guide you through deploying an AKS cluster in different ways. You’ll then explore the Azure portal by deploying a sample guestbook application on AKS and installing complex Kubernetes apps using Helm. With the help of real-world examples, you'll also get to grips with scaling your application and cluster. As you advance, you'll understand how to overcome common challenges in AKS and secure your application with HTTPS and Azure AD (Active Directory). Finally, you’ll explore serverless functions such as HTTP triggered Azure functions and queue triggered functions. By the end of this Kubernetes book, you’ll be well-versed with the fundamentals of Azure Kubernetes Service and be able to deploy containerized workloads on Microsoft Azure with minimal management overhead.

Who is this book for?

This book is for aspiring DevOps professionals, system administrators, developers, and site reliability engineers looking to understand test and deployment processes and improve their efficiency. If you’re new to working with containers and orchestration, you’ll find this book useful.

What you will learn

  • Plan, configure, and run containerized applications in production
  • Use Docker to build apps in containers and deploy them on Kubernetes
  • Improve the configuration and deployment of apps on the Azure Cloud
  • Store your container images securely with Azure Container Registry
  • Install complex Kubernetes applications using Helm
  • Integrate Kubernetes with multiple Azure PaaS services, such as databases, Event Hubs and Functions.
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Publication date : May 18, 2020
Length: 368 pages
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Language : English
ISBN-13 : 9781800209671
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Table of Contents

15 Chapters
Section 1: The Basics Chevron down icon Chevron up icon
1. Introduction to Docker and Kubernetes Chevron down icon Chevron up icon
2. Kubernetes on Azure (AKS) Chevron down icon Chevron up icon
Section 2: Deploying on AKS Chevron down icon Chevron up icon
3. Application deployment on AKS Chevron down icon Chevron up icon
4. Building scalable applications Chevron down icon Chevron up icon
5. Handling common failures in AKS Chevron down icon Chevron up icon
6. Securing your application with HTTPS and Azure AD Chevron down icon Chevron up icon
7. Monitoring the AKS cluster and the application Chevron down icon Chevron up icon
Section 3: Leveraging advanced Azure PaaS services Chevron down icon Chevron up icon
8. Connecting an app to an Azure database Chevron down icon Chevron up icon
9. Connecting to Azure Event Hubs Chevron down icon Chevron up icon
10. Securing your AKS cluster Chevron down icon Chevron up icon
11. Serverless functions Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Full star icon 5
(2 Ratings)
5 star 100%
4 star 0%
3 star 0%
2 star 0%
1 star 0%
pieter vercammen Dec 23, 2020
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Dit boek heeft mij echt geholpen aan de slag te gaan met kubernetes.
Amazon Verified review Amazon
Joseph A. Francis Oct 18, 2020
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I don't leave a lot of reviews, but I thought this book was very informative, concise, well-written and accurate. The code samples seem perfect. This is my go-to resource for AKS.
Amazon Verified review Amazon
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