Book Image

Modern DevOps Practices

By : Gaurav Agarwal
Book Image

Modern DevOps Practices

By: Gaurav Agarwal

Overview of this book

Containers have entirely changed how developers and end-users see applications as a whole. With this book, you'll learn all about containers, their architecture and benefits, and how to implement them within your development lifecycle. You'll discover how you can transition from the traditional world of virtual machines and adopt modern ways of using DevOps to ship a package of software continuously. Starting with a quick refresher on the core concepts of containers, you'll move on to study the architectural concepts to implement modern ways of application development. You'll cover topics around Docker, Kubernetes, Ansible, Terraform, Packer, and other similar tools that will help you to build a base. As you advance, the book covers the core elements of cloud integration (AWS ECS, GKE, and other CaaS services), continuous integration, and continuous delivery (GitHub actions, Jenkins, and Spinnaker) to help you understand the essence of container management and delivery. The later sections of the book will take you through container pipeline security and GitOps (Flux CD and Terraform). By the end of this DevOps book, you'll have learned best practices for automating your development lifecycle and making the most of containers, infrastructure automation, and CaaS, and be ready to develop applications using modern tools and techniques.
Table of Contents (19 chapters)
1
Section 1: Container Fundamentals and Best Practices
7
Section 2: Delivering Containers
15
Section 3: Modern DevOps with GitOps

Creating the required infrastructure with Terraform

As our goal was to build a scalable LAMP stack, we will define a VM scale set using the apache-webserver image we created and a single Virtual Machine with the mysql-dbserver image. A VM scale set is an autoscaling group of Virtual Machines that will scale out and scale back horizontally based on traffic, similar to how we did with containers on Kubernetes.

We will create the following resources:

  • A new resource group called lamp-rg
  • A virtual network with a resource group called lampvnet
  • A subnet within lampvnet called lampsub
  • Within the subnet, we create a NIC for the database called db-nic that contains the following:

    – A network security group called db-nsg

    – A Virtual Machine called db that uses the custom mysql-dbserver image

  • We then create a VM scale set that includes the following:

    –A network profile called webnp

    – A backend address pool

    – A load balancer called web-lb...