Book Image

Kubernetes - A Complete DevOps Cookbook

By : Murat Karslioglu
Book Image

Kubernetes - A Complete DevOps Cookbook

By: Murat Karslioglu

Overview of this book

Kubernetes is a popular open source orchestration platform for managing containers in a cluster environment. With this Kubernetes cookbook, you’ll learn how to implement Kubernetes using a recipe-based approach. The book will prepare you to create highly available Kubernetes clusters on multiple clouds such as Amazon Web Services (AWS), Google Cloud Platform (GCP), Azure, Alibaba, and on-premises data centers. Starting with recipes for installing and configuring Kubernetes instances, you’ll discover how to work with Kubernetes clients, services, and key metadata. You’ll then learn how to build continuous integration/continuous delivery (CI/CD) pipelines for your applications, and understand various methods to manage containers. As you advance, you’ll delve into Kubernetes' integration with Docker and Jenkins, and even perform a batch process and configure data volumes. You’ll get to grips with methods for scaling, security, monitoring, logging, and troubleshooting. Additionally, this book will take you through the latest updates in Kubernetes, including volume snapshots, creating high availability clusters with kops, running workload operators, new inclusions around kubectl and more. By the end of this book, you’ll have developed the skills required to implement Kubernetes in production and manage containers proficiently.
Table of Contents (12 chapters)

Managing upgrades through blue/green deployments

The blue-green deployment architecture is a method that's used to reduce downtime by running two identical production environments that can be switched between when needed. These two environments are identified as blue and green. In this section, we will perform rollover application upgrades. You will learn how to roll over a new version of your application with persistent storage by using blue/green deployment in Kubernetes.

Getting ready

Make sure you have a Kubernetes cluster ready and kubectl and helm configured to manage the cluster resources.

For this recipe, we will need a persistent storage provider to take snapshots from one version of the application and use clones with the other version of the application to keep the persistent volume content. We will use OpenEBS as a persistent storage provider, but you can also use any CSI-compatible storage provider.

Make sure OpenEBS has been configured with the cStor storage engine...