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)

Chapter 3: Introduction to Kubernetes

Activity 3: Installing a WordPress Blog and Database on Kubernetes


Perform the following steps to complete this activity:

  1. Create a two-container stateful set definition inside the wordpress-database.yaml file with the following specifications:

    The nme should be wordpress-database and the replica count should be set to 1. The database container should have the name of database and use the container image of mysql:5.7. Publish the container to port 3306 and mount the data volume to the /var/lib/mysql path. In addition, set the following environment variables:

    Figure 3.24: Environment variables

    Create a blog container with the name blog using the latest WordPress container image and publish the container to port 80. In addition, set the following environment variables:

    Figure 3.25: Environment variables

    Include a volume claim with the name data and 1GB storage.

    The stateful set description as YAML for the specification is as follows...