Day 52: Your CI/CD pipeline on AWS - Part 3 🚀 ☁(Jan 17, 2024)

🙏 Introduction:

In this blog, we will deploy a CI/CD pipeline on AWS using tools such as CodeCommit, CodeBuild, CodeDeploy, CodePipeline, and S3. This is Part 3.

🔶What is CodeDeploy ?

• AWS CodeDeploy is a deployment service that automates application deployments to Amazon EC2 instances, on-premises instances, serverless Lambda functions, or Amazon ECS services.

• CodeDeploy can deploy application content that runs on a server and is stored in Amazon S3 buckets, GitHub repositories, or Bitbucket repositories. It can also deploy a serverless Lambda function. There is no need to make changes to your existing code before using CodeDeploy.

🎯Task: 1

1. Read about Appspec.yaml file for CodeDeploy

The application specification file (AppSpec file) is a YAML -formatted or JSON-formatted file used by CodeDeploy to manage a deployment. The AppSpec file for an EC2/On-Premises deployment must be named appspec. yml or appspec. yaml

1. Deploy index.html file on EC2 machine using nginx

Create Application

• Navigate to CodeDeploy and click on Create Application.

• Provide an application name, select the compute platform as EC2 instance, and click on Create application

• Application created

Create Deployment group in application of CodeDeploy

• Go to IAM role and create one role with below permission policies

  

• Go to EC2 instance and create an instance

• Now go to codedeploy application and click on create deployment group

• Enter group name and select previously created role

• Select In place and enter name of EC2 instance which we created

• Deployment group created

1. Setup a CodeDeploy agent in order to deploy code on EC2

Manually Set Up a CodeDeploy Agent

• you have to setup a CodeDeploy agent in order to deploy code on EC2

• Connect to EC2 instance and create install.sh file and enter below script and run it

•       #!/bin/bash 
        # This installs the CodeDeploy agent and its prerequisites on Ubuntu 22.04.  
        sudo apt-get update 
        sudo apt-get install ruby-full ruby-webrick wget -y 
        cd /tmp 
        wget https://aws-codedeploy-us-west-2.s3.us-west-2.amazonaws.com/releases/codedeploy-agent_1.3.2-1902_all.deb 
        mkdir codedeploy-agent_1.3.2-1902_ubuntu22 
        dpkg-deb -R codedeploy-agent_1.3.2-1902_all.deb codedeploy-agent_1.3.2-1902_ubuntu22 
        sed 's/Depends:.*/Depends:ruby3.0/' -i ./codedeploy-agent_1.3.2-1902_ubuntu22/DEBIAN/control 
        dpkg-deb -b codedeploy-agent_1.3.2-1902_ubuntu22/ 
        sudo dpkg -i codedeploy-agent_1.3.2-1902_ubuntu22.deb 
        systemctl list-units --type=service | grep codedeploy 
        sudo service codedeploy-agent status
  

• EC2 doesn't have a role policy that allows it to retrieve data from S3 for CodeDeploy. Therefore, create a new service role to enable communication between EC2 and S3, as well as CodeDeploy.

Attach that service role to EC2 instance

• Select the EC2 instance, then in the Actions menu, navigate to Security and click on Modify IAM role.

• Select the role that we created in above step & click on Update IAM role

• Restart code-deploy agent

🎯Task: 2

1. Add appspec.yaml file to CodeCommit Repository and complete the deployment process

• Create appspec.yml file

• Create a script folder. Inside the script folder, create install_nginx.sh and start_nginx.sh.

• Push this file to code-commit repository

• Click on Strat build

Deployment process

• Navigate to CodeDeploy and click on the application we created, then proceed to the Deployments section & Click on Create deployment.

• Select the Deployment group name, enter the path, and click on Create deployment.

• Deployment completed successfully

• Copy the public IP address of the instance and paste it into your browser. This will display the output of the index.html file.