CI/CD pipeline on AWS with Jenkins and CodeDeploy

Create an IAM User:
- Go to the IAM console in AWS.
- Create a new user with programmatic access.
- Attach the policy AmazonS3FullAccess and other necessary policies for CodeBuild and CodeDeploy.
- Record the Access Key ID and Secret Access Key.
Create an S3 Bucket:
- Navigate to the S3 console and create a bucket.
- Record the bucket name and URL.
Launch an EC2 Instance:
- Use AWS Linux AMI for simplicity.
- Record the Instance ID once the instance is running.

Set Up a CodeBuild Project:
- In the AWS Developer Tools console, create a new CodeBuild project.
- Choose "No source" since the source will be handled by Jenkins.
- Use a managed environment with Amazon Linux OS.
- Create and attach a service role for CodeBuild and record its name.
- Specify your S3 bucket for build artifacts (e.g., codebuild-artifact.zip).
Set Up CodeDeploy Configuration:
- In the CodeDeploy console, create a deployment configuration.
- Select EC2 as the compute platform.
- Enable cloud logging if needed for debugging.
- Record the deployment configuration name.

Install Plugins:
- Install the following plugins in Jenkins:
  - File Operations
  - AWS CodeBuild
  - HTTP Request
Create a Jenkins Job:
- Build Step 1: AWS CodeBuild
  - Enter your IAM credentials, CodeBuild project name, and AWS region.
  - Select "Use Jenkins Source."
- Build Step 2: Clean Environment (File Operations - Delete)
  - Delete all files (*) to ensure a clean build environment.
- Build Step 3: Download Build Artifact (HTTP Request)
  - Construct the S3 URL using your bucket name and artifact name (e.g., https://<bucket-name>.s3.<region>.amazonaws.com/codebuild-artifact.zip).
  - Configure advanced options:
    - Timeout: 0
    - Expected Response Codes: 100-399
    - Output Response to File: codebuild-artifact.zip
- Post-Build Steps:
  - Use File Operations to unzip the downloaded artifact and delete the .zip file.
  - Deploy to AWS CodeDeploy using the saved configuration.