> ## Documentation Index
> Fetch the complete documentation index at: https://notes.kodekloud.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Demonstration 3 Create 4 Stage Pipeline
> Build a complete AWS CodePipeline CI/CD workflow with four stages Source, Build, Test, and Deploy using AWS services for consistent deployments and faster delivery cycles.
In this walkthrough, you will build a complete AWS CodePipeline CI/CD workflow with four stages—Source, Build, Test, and Deploy—using AWS CodeCommit, CodeBuild, CodeDeploy, and EC2. Automating these steps ensures consistent, repeatable deployments and faster delivery cycles.
## Pipeline Overview
| Stage | AWS Service | Purpose |
| ------ | ----------- | --------------------------------------- |
| Source | CodeCommit | Store application code and scripts |
| Build | CodeBuild | Install dependencies and compile assets |
| Test | CodeBuild | Run automated tests |
| Deploy | CodeDeploy | Deploy artifacts to EC2 instances |
***
## 1. Source Stage with CodeCommit
1. Open the [AWS CodeCommit console](https://docs.aws.amazon.com/codecommit/latest/userguide/welcome.html) and create a new repository named `kodekloudcpdemo`.
2. Enter **Repository name** as `kodekloudcpdemo` and click **Create**.
3. Clone the repo locally:
```bash theme={null}
git clone https://git-codecommit.us-east-2.amazonaws.com/v1/repos/KodeKloudCPDemo
```
4. Back in the console, click **Upload file** to add your application files (`after_install`, `application_start`, `appspec.yml`, etc.). For each file, provide an author name and email, then commit.
5. After each commit, you’ll see a success notification:
6. When all nine files are uploaded, your repo should list them as shown:
***
## 2. Build Stage with CodeBuild
1. Navigate to the [AWS CodeBuild console](https://docs.aws.amazon.com/codebuild/latest/userguide/welcome.html) and click **Create build project**.
2. Set **Project name** to `KodeKloudCPdemo`.
3. Under **Source**, select **AWS CodeCommit**, choose `kodekloudcpdemo`, and branch `main`.
4. In **Environment**, pick:
* Operating system: **Linux**
* Runtime: **Standard**
* Image: **aws/codebuild/standard:2.0**
5. Keep service role and log settings at their defaults, then click **Create build project**.
6. Confirm your project is ready:
The default `buildspec.yml` uses Node.js 14, but your app requires Node.js 10. Update the `runtime-versions` accordingly to avoid build failures.
### Adjusting the Buildspec
Open `buildspec.yml` in your CodeCommit repo. Change Node.js version from 14 to 10:
```yaml theme={null}
version: 0.2
phases:
install:
runtime-versions:
nodejs: 10
commands:
- echo "Installing dependencies"
- npm install
build:
commands:
- echo "Building the application"
- npm run build
artifacts:
files:
- '**/*'
```
Commit your changes with author metadata.
***
## 3. Prepare EC2 Instances for CodeDeploy
1. In the [EC2 console](https://docs.aws.amazon.com/ec2/index.html), click **Launch Instance**.
2. Name the instance `CodePipelineCPdemo` and choose an Ubuntu AMI.
3. Select or create a key pair.
4. Open HTTP (port 80) and HTTPS (port 443) in the security group.
5. Enable **Auto-assign Public IP**.
6. Under **Advanced Details**, attach an IAM instance profile with CodeDeploy permissions.
7. Click **Launch Instance**.
Review network settings and instance summary:
Select the IAM role:
Verify the instance is running before proceeding to CodeDeploy.
Ensure the IAM instance profile has `AmazonEC2RoleforAWSCodeDeploy` permissions so the CodeDeploy agent can communicate with AWS.
***
## 4. Deploy Stage with CodeDeploy
1. Go to the [AWS CodeDeploy console](https://docs.aws.amazon.com/codedeploy/latest/userguide/welcome.html) and click **Create application**.
2. Name it `KodeKloudCPdemo` and choose **EC2/On-premises** as the compute platform.
3. Create a deployment group:
* Name: **KodeKloudCPdemo**
* Service role: **CodeDeployDefault** (or your custom role)
* Uncheck load balancer integration.
* Environment: **EC2/On-premises**
* Tag key/value matching your EC2 instance (`Name=CodePipelineCPdemo`).
4. Select the EC2 instance by tag:
5. (Optional) Install or verify the CodeDeploy agent via Systems Manager, then click **Create deployment group**.
***
## 5. Create the Four-Stage Pipeline
1. Open the [AWS CodePipeline console](https://docs.aws.amazon.com/codepipeline/latest/userguide/welcome.html) and click **Create pipeline**.
2. Name it `KodeKloudCPdemo` and use the default service role.
### Source Stage
* Provider: **AWS CodeCommit**
* Repository: `kodekloudcpdemo`
* Branch: `main`
### Build Stage
* Provider: **AWS CodeBuild**
* Project name: `KodeKloudCPdemo`
### Deploy Stage
* Provider: **AWS CodeDeploy**
* Region: *your AWS Region*
* Application: `KodeKloudCPdemo`
* Deployment group: `KodeKloudCPdemo`
Click **Create pipeline**. The pipeline initializes and starts its first run:
***
## 6. Adding the Test Stage
Once the initial pipeline run succeeds, insert a **Test** stage between Build and Deploy:
1. Click **Edit** in the pipeline view.
2. Under the Build stage, click **Add stage**, name it **Test**, then **Add stage**.
3. Inside **Test**, click **Add action group** and configure:
* Action name: `TestAction`
* Provider: **AWS CodeBuild**
* Input artifact: `BuildArtifact`
* Project name: `KodeKloudCPdemo`
4. Save changes and click **Release change**. The pipeline will now run all four stages in sequence, ending with a green success status across Source, Build, Test, and Deploy.
***
## Summary
You have successfully built an automated four-stage CI/CD pipeline on AWS:
1. **Source**: CodeCommit
2. **Build**: CodeBuild
3. **Test**: CodeBuild
4. **Deploy**: CodeDeploy
Use this template to accelerate your deployments and enforce consistent delivery practices.
***
## Links and References
* [AWS CodePipeline Documentation](https://docs.aws.amazon.com/codepipeline/latest/userguide/welcome.html)
* [AWS CodeCommit Documentation](https://docs.aws.amazon.com/codecommit/latest/userguide/welcome.html)
* [AWS CodeBuild Documentation](https://docs.aws.amazon.com/codebuild/latest/userguide/welcome.html)
* [AWS CodeDeploy Documentation](https://docs.aws.amazon.com/codedeploy/latest/userguide/welcome.html)
* [EC2 Instance Connect](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/Connect-using-EC2-Instance-Connect.html)