Book Image

Introduction to DevOps with Kubernetes

By : Onur Yılmaz, Süleyman Akba≈ü
Book Image

Introduction to DevOps with Kubernetes

By: Onur Yılmaz, Süleyman Akba≈ü

Overview of this book

Kubernetes and DevOps are the two pillars that can keep your business at the top by ensuring high performance of your IT infrastructure. Introduction to DevOps with Kubernetes will help you develop the skills you need to improve your DevOps with the power of Kubernetes. The book begins with an overview of Kubernetes primitives and DevOps concepts. You'll understand how Kubernetes can assist you with overcoming a wide range of real-world operation challenges. You will get to grips with creating and upgrading a cluster, and then learn how to deploy, update, and scale an application on Kubernetes. As you advance through the chapters, you’ll be able to monitor an application by setting up a pod failure alert on Prometheus. The book will also guide you in configuring Alertmanager to send alerts to the Slack channel and trace down a problem on the application using kubectl commands. By the end of this book, you’ll be able to manage the lifecycle of simple to complex applications on Kubernetes with confidence.
Table of Contents (11 chapters)

Manual Kubernetes Cluster Setup

Kubernetes is a fairly elaborate system; however, it relies on developer experience to make it easier to set up and manage the clusters. kubeadm is the official Kubernetes toolkit for quickly and easily creating a minimal, viable, and certified cluster. This installs all required master and node components; however, cloud-specific or nice-to-have add-ons, such as the dashboard, are left out. kubeadm is used in many complex Kubernetes provider solutions as a building block; however, it should be mentioned that it cannot provision any infrastructure. On the other hand, it has a huge advantage of running on every platform, from high-end servers to Raspberry Pi nodes.

To create a Kubernetes cluster, the main approach is to initialize a master first, and join all the nodes afterward. Let's look at the following flowchart to understand this:

Figure 4.1: Flow of cluster creating with kubeadm

It is expected that you will have...