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
Section 1: DevOps and Infrastructure as Code
Section 2: DevOps CI/CD Pipeline
Section 3: Containerized Applications with Docker and Kubernetes
Section 4: Testing Your Application
Section 5: Taking DevOps Further

Creating a CI/CD pipeline for Kubernetes with Azure Pipelines

So far, we have seen how to use kubectl to deploy a containerized application in a local K8S cluster, or in a remote cluster with AKS.

Now, we will see how to create a complete CI/CD pipeline for Kubernetes, from the creation of a new Docker image pushed in the Docker Hub, to its deployment in an AKS cluster.

To build this pipeline, we'll use the Azure Pipelines service that is in Azure DevOps, which we have previously discussed in Chapter 6, Continuous Integration and Continuous Delivery, and Chapter 7, Containerizing Your Application with Docker.

This continuous integration pipeline will be composed of the following:

  • A build that will be in charge of building and promoting a new Docker image in the Docker Hub.
  • A release that will use our YAML deployment specification file to deploy the latest version of the...