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

Reducing Deployment Downtime

So far, we have discussed DevOps practices such as Infrastructure as Code, CI/CD pipelines, and the automation of different types of tests.

In Chapter 1, DevOps Culture and Practices, we saw that these DevOps practices will improve the quality of applications and thus improve the financial gain of a company. We will now go deeper into DevOps practices by looking at how to ensure the continuous availability of your applications even during your deployments, and how to deliver new versions of these applications more frequently in production.

Often, what we see is that deployments require your applications to be interrupted by, for example, infrastructure changes or service shutdowns. Moreover, what we also see is that companies are still reluctant to deliver more frequently in production. They are not equipped to test the application in the production...