Prerequisites

• Docker
• ArgoCD
• AWS CLI
• Kubectl
• MongoDB Atlas Cluster

The solution is a simple web application that allows users to create, read, update and delete (CRUD) a TODO list. The application is composed of a front-end, a back-end and a MongoDB database. The front-end is a React application that allows users to interact with the application. The back-end is a Node.js application that handles the requests from the front-end and communicates with the database. The database is a MongoDB database that stores the information.

For this project, the ECR will be created manually, so it is independent of the infrastructure built with Terraform. You can check the infrastructure repository here

To create the ECR repository, run the following command:

Note: Make sure to have an IAM user setup with the correct permissions to create and push to ECR in AWS CLI.

aws ecr create-repository --repository-name rest-api --image-scanning-configuration scanOnPush=true --image-tag-mutability IMMUTABLE --region us-east-1

1. Build the Docker image using the following command:

Note: You can pull the image from Docker Hub using the following command: docker pull waltergaitan/mern-stack

docker build -t mern-image .  

2. Test the image locally using the following command:

docker run -p 80:80 mern-image

After the image is running, navigate to http://localhost:80 in your web browser to verify that the application is running.

3. Create an ECR repository using the following command:

aws ecr create-repository --repository-name <repository-name> --image-scanning-configuration scanOnPush=true --image-tag-mutability IMMUTABLE --region us-east-1

4. Authenticate Docker to your Amazon ECR registry using the following command:

aws ecr get-login-password --region us-east-1 | docker login --username AWS --password-stdin <aws_account_id>.dkr.ecr.us-east-1.amazonaws.com

5. Tag your image using the following command:

docker tag mern-stack:latest <Repository URI>/<repository-name>:v1

6. Push the image to your Amazon ECR repository using the following command:

docker push <Repository URI>/mern-stack:v1

1. Create an EKS cluster using the repository Terraform EKS Cluster

2. Connect to the EKS cluster using the following command:

rm ~/.kube/config
aws eks --region us-east-1 update-kubeconfig --name mern-stack-<terraform.workspace>-eks

Next, you can find further information about using the k8s manifests and ArgoCD to deploy the application inside their respective folders. I recommend you to check the ArgoCD folder first, since it is the easiest way to deploy the application.