This content originally appeared on DEV Community and was authored by Mansi Gawade
Introduction
Continuous Integration and Continuous Deployment (CI/CD) are key principles in DevOps that automate software delivery. AWS provides native services like AWS CodePipeline, CodeBuild, and CodeDeploy to set up an efficient CI/CD workflow. In this guide, we’ll build a complete CI/CD pipeline to deploy a web application on an EC2 instance.
Step 1: Understanding AWS CI/CD Services
1. AWS CodePipeline
Automates the software release process.
Orchestrates builds, tests, and deployments.
2. AWS CodeBuild
Compiles source code, runs tests, and packages applications.
Eliminates the need for managing build servers.
3. AWS CodeDeploy
Deploys applications automatically to EC2, Lambda, or ECS.
Supports blue/green and rolling deployments.
Step 2: Setting Up the AWS CI/CD Pipeline
We’ll create a CodePipeline that:
Fetches source code from GitHub.
Builds the application using CodeBuild.
Deploys it to an EC2 instance using CodeDeploy.
Prerequisites
- An AWS account with IAM permissions for CodePipeline, CodeBuild, and CodeDeploy.
- An EC2 instance with an IAM Role attached.
- A GitHub repository containing the application code.
Step 3: Configuring CodePipeline
1. Create a New CodePipeline
- Open AWS Console → Navigate to CodePipeline.
- Click Create Pipeline → Enter a name (e.g., MyWebAppPipeline).
- Choose New Service Role (AWS will create one).
- Click Next.
Step 4: Adding Source Stage (GitHub)
- Select GitHub as the source provider.
- Connect your GitHub account and select the repository.
- Choose the branch (e.g., main).
- Click Next.
Step 5: Setting Up CodeBuild
- Create a buildspec.yml File This file defines the build steps.
version: 0.2
phases:
install:
runtime-versions:
nodejs: 18
commands:
- npm install
build:
commands:
- npm run build
artifacts:
files:
- '*/'
- Add this file to the GitHub repository.
- In CodePipeline, select AWS CodeBuild.
- Create a new build project:
- Environment: Use AWS managed image (Ubuntu).
- Buildspec file: Select buildspec.yml.
Step 6: Setting Up CodeDeploy
Install the CodeDeploy Agent on EC2
SSH into the EC2 instance and run:
sudo yum update -y
sudo yum install ruby
sudo yum install wget
cd /home/ec2-user
wget https://aws-codedeploy-us-east-1.s3.amazonaws.com/latest/install
chmod +x ./install
sudo ./install auto
sudo service codedeploy-agent startCreate an appspec.yml File
This file defines the deployment steps.
`version: 0.0
os: linux
files:
- source: /
destination: /var/www/html
hooks:
ApplicationStart:
- location: scripts/start.sh timeout: 300 runas: ec2-user`
- Register the EC2 Instance in CodeDeploy
- Create a CodeDeploy application in AWS.
- Create a Deployment Group and link it to the EC2 instance.
- In CodePipeline, select AWS CodeDeploy as the deploy provider.
Step 7: Deploy and Automate
- Push a change to the GitHub repository.
- AWS CodePipeline will automatically trigger:
- CodeBuild will build the application.
- CodeDeploy will deploy it to the EC2 instance.
- Verify deployment by accessing the EC2 public IP in a browser.
Best Practices for AWS CI/CD
✅ Use IAM roles instead of storing AWS credentials.
✅ Enable logging in CodePipeline for debugging.
✅ Use Blue/Green Deployments in CodeDeploy to minimize downtime.
✅ Monitor deployments with CloudWatch and SNS alerts.
Conclusion
AWS CI/CD services simplify deployment automation. By integrating CodePipeline, CodeBuild, and CodeDeploy, you can create an efficient and scalable CI/CD workflow for web applications.
This content originally appeared on DEV Community and was authored by Mansi Gawade
Mansi Gawade | Sciencx (2025-02-21T19:30:24+00:00) Implementing CI/CD on AWS: A Complete Guide with CodePipeline, CodeBuild, and CodeDeploy. Retrieved from https://www.scien.cx/2025/02/21/implementing-ci-cd-on-aws-a-complete-guide-with-codepipeline-codebuild-and-codedeploy/
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