DevOps CICD Pipeline A Step-by-Step Tutorial 1. Git Cloning & CICD Pipeline using Jenkins

Creating a DevOps CI/CD (Continuous
Integration/Continuous Deployment) pipeline using Jenkins and Git involves
several steps. Here's a high-level, step-by-step tutorial:

Step 1: Prerequisites

Ensure you have a Jenkins server set up and
running.

Have a Git repository with your application code.

Step 2: Jenkins Configuration

Install necessary plugins: In Jenkins, go to
"Manage Jenkins" > "Manage Plugins" and install plugins
like Git, Pipeline, and any other plugins required for your project.

Set up Jenkins credentials: Configure credentials
to access your Git repository and any other required services. Go to
"Manage Jenkins" > "Manage Credentials."

Step 3: Create a Jenkins Job

Click on "New Item" on the Jenkins
dashboard.

Select "Pipeline" and give your job a
name.

Under "Pipeline," choose the pipeline
script option (e.g., Pipeline script from SCM).

Configure the source code management section to
connect to your Git repository.

Define your pipeline script in the Jenkinsfile
located in your repository. You can use a declarative pipeline or scripted
pipeline based on your preference.

Step 4: Jenkinsfile Configuration

In your Jenkinsfile, define the stages of your
CI/CD pipeline. Common stages include:

"Checkout": Clone the Git repository.

"Build": Compile and package your
application.

"Test": Run tests to validate your code.

"Deploy": Deploy your application to a
testing/staging environment.

"Promote": Promote your application to
production.

"Cleanup": Clean up after the pipeline
completes.

Use the "node" block to allocate
resources for each stage. For example:

1. 
   

   Copy the code
   node {
       // Stage configuration
   }

Use Jenkins plugins or custom scripts to perform
tasks like Docker builds, Maven builds, and deployments.

Step 5: Trigger the Pipeline

Save your Jenkins job configuration.

Manually trigger the job or set up webhooks to
trigger it automatically on code changes.

Step 6: Monitor and Optimize

Once the pipeline runs, monitor the Jenkins console
output for any issues.

Use Jenkins dashboards and plugins to monitor and
visualize the pipeline's status and performance.

Continuously optimize your pipeline by improving
build times, reducing manual intervention, and enhancing testing and deployment
processes.

Remember that this is a simplified tutorial, and
your actual CI/CD pipeline may have more complexity and specific requirements.
Customize the Jenkinsfile and pipeline stages to suit your project's needs and
adapt the CI/CD process to your application's stack and deployment targets.