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Learning DevOps

Learning DevOps

By : Mikael Krief
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Learning DevOps

Learning DevOps

4 (4)
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)
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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

Running Terraform for deployment

With the Terraform configuration written, we now need to run Terraform to deploy our infrastructure.

However, before any execution, first, it is necessary to provide authentication with the Azure SP to ensure that Terraform can manage the Azure resources.

To do this, we can either set the environment variables specific to Terraform to contain the information of the SP created earlier in the Configuring Terraform for Azure section, or we can use the az cli script.

The following script exports the four Terraform environment variables in the Linux OS:

export ARM_SUBSCRIPTION_ID=xxxxx-xxxxx-xxxx-xxxx
export ARM_CLIENT_ID=xxxxx-xxxxx-xxxx-xxxx
export ARM_CLIENT_SECRET=xxxxxxxxxxxxxxxxxx
export ARM_TENANT_ID=xxxxx-xxxxx-xxxx-xxxx

Additionally, we can use the az cli script with the login command:

az login

Once authenticated, we can run the Terraform workflow.

In our scenario, we begin with an empty Azure subscription without any Azure...

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Learning DevOps
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