Preface

This book walks you through a journey of learning fundamental concept and useful skills for DevOps, containers and Kubernetes.

What this book covers

Chapter 1, Introduction to DevOps, walks you through the evolution from the past to what we call DevOps today and the tools that you should know. Demand for people with DevOps skills has been growing rapidly over the last few years. It has accelerated software development and delivery speed and has also helped business agility.

Chapter 2, DevOps with Container, helps you learn the fundamentals and container orchestration. With the trend of microservices, container has been a handy and essential tool for every DevOps because of its language agnostic isolation.

Chapter 3, Getting Started with Kubernetes, explores the key components and API objects in Kubernetes and how to deploy and manage containers in a Kubernetes cluster. Kubernetes eases the pain of container orchestration with a lot of killer features, such as container scaling, mounting storage systems, and service discovery.

Chapter 4, Working with Storage and Resources, describes volume management and also explains CPU and memory management in Kubernetes. Container storage management can be hard in a cluster.

Chapter 5, Network and Security, explains how to allow inbound connection to access Kubernetes services and how default networking works in Kubernetes. External access to our services is necessary for business needs.

Chapter 6, Monitoring and Logging, shows you how to monitor a resource's usage at application, container, and node level using Prometheus. This chapter also shows how to collect logs from your applications, as well as Kubernetes with Elasticsearch, Fluentd, and Kibana stack. Ensuring a service is up and healthy is one of the major responsibilities of DevOps.

Chapter 7, Continuous Delivery, explains how to build a Continuous Delivery pipeline with GitHub/DockerHub/TravisCI. It also explains how to manage updates, eliminate the potential impact when doing rolling updates, and prevent possible failure. Continuous Delivery is an approach to speed up your time-to-market.

Chapter 8, Cluster Administration, describes how to solve the preceding problems with the Kubernetes namespace and ResourceQuota and how to do access control in Kubernetes. Setting up administrative boundaries and access control to Kubernetes cluster are crucial to DevOps.

Chapter 9, Kubernetes on AWS, explains AWS components and shows how to provision Kubernetes on AWS. AWS is the most popular public cloud. It brings the infrastructure agility and flexibility to our world.

Chapter 10, Kubernetes on GCP, helps you understand the difference between GCP and AWS, and the benefit of running containerized applications in hosted service from Kubernetes’ perspective. Google Container Engine in GCP is a managed environment for Kubernetes.

Chapter 11, What’s Next?, introduces other similar technologies, such as Docker Swarm mode, Amazon ECS, and Apache Mesos and you’ll have an understanding of which the best approach is for your business. Kubernetes is open. This chapter will teach you how to get in touch with Kubernetes community to learn ideas from others.

What you need for this book

This book will guide you through the methodology of software development and delivery with Docker container and Kubernetes using macOS and public cloud (AWS and GCP). You will need to install minikube, AWSCLI, and the Cloud SDK to run the code samples present in this book.

Who this book is for

This book is intended for DevOps professionals with some software development experience who are willing to scale, automate, and shorten software delivery to the market.

Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."

Any command-line input or output is written as follows:

$ sudo yum -y -q install nginx
$ sudo /etc/init.d/nginx start
Starting nginx: 

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "The shortcuts in this book are based on the Mac OS X 10.5+ scheme."

Warnings or important notes appear like this.

Tips and tricks appear like this.

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Questions

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