Book Image

Learning DevOps

By : Mikael Krief
Book Image

Learning DevOps

By: Mikael Krief

Overview of this book

The implementation of DevOps processes requires the efficient use of various tools, and the choice of these tools is crucial for the sustainability of projects and collaboration between development (Dev) and operations (Ops). This book presents the different patterns and tools that you can use to provision and configure an infrastructure in the cloud. You'll begin by understanding DevOps culture, the application of DevOps in cloud infrastructure, provisioning with Terraform, configuration with Ansible, and image building with Packer. You'll then be taken through source code versioning with Git and the construction of a DevOps CI/CD pipeline using Jenkins, GitLab CI, and Azure Pipelines. This DevOps handbook will also guide you in containerizing and deploying your applications with Docker and Kubernetes. You'll learn how to reduce deployment downtime with blue-green deployment and the feature flags technique, and study DevOps practices for open source projects. Finally, you'll grasp some best practices for reducing the overall application lead time to ensure faster time to market. By the end of this book, you'll have built a solid foundation in DevOps, and developed the skills necessary to enhance a traditional software delivery process using modern software delivery tools and techniques
Table of Contents (23 chapters)
Free Chapter
1
Section 1: DevOps and Infrastructure as Code
6
Section 2: DevOps CI/CD Pipeline
9
Section 3: Containerized Applications with Docker and Kubernetes
12
Section 4: Testing Your Application
16
Section 5: Taking DevOps Further

Summary

In this chapter, we have seen how to install Packer and use it to create custom VM images. The VM image was made from two Packer templates: the first one using scripts and the second one using Ansible. Finally, we modified our Terraform code to use our VM image.

This chapter ends the implementation of IaC practices, starting with Terraform to provision a cloud infrastructure, then with Ansible for server configuration, and, finally, we finished with Packer for VM image creation.

With these VM images created by Packer, we will be able to improve infrastructure provisioning times with faster deployment, ready-to-use VMs, and, therefore, a reduction in downtime.

It is obvious that these are not the only IaC tools; there are many others on the marketplace, and we will have to do technology monitoring to find the ones that best suit your needs.

In the next chapter, we will...