Deploying Docker containers on AWS ECS

In this tutorial we will explain you how to:

1. build a node application with Docker on Local Machine
2. Create an ECR repository to store our Docker Image
3. Upload the Docker image to the ECR repository
4. Create and launch an Elastic Container Cluster
5. Launch our application as a task within the Elastic Container Cluster
6. Expose and open this application on the internet

Step 1 ) Clone Below git URL for Nodeapp  

git clone https://github.com/harblaith7/Docker-AWS-Crash-Course.git

Step 2) Run the following command to build an image with the tag node-web-app

docker build -t node-web-app .

Step 3) Run the following command to start the application in detached mode:

docker run -p 6565:5000 -d node-web-app

Step 4) Install and configure aws cli

• curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
• unzip awscliv2.zip
• sudo ./aws/install

- Create IAM user and keep Access_key_ID:Secret_access_key

• aws configure

Step 5) Create ECR Repository And Push the Docker Image 

- Change --repository-name and --region

$ aws ecr create-repository --repository-name node-web-app-repo --region ap-south-1

- Tagging A Repository and Change aws_account_number, Repository Name.

$ docker tag node-web-app aws_account_number_here.dkr.ecr.ap-south-1.amazonaws.com/node-web-app-repo:latest

- Login Into Docker Client Registry

$ aws ecr get-login-password | docker login --username AWS --password-stdin aws_account_number_here.dkr.ecr.ap-south-1.amazonaws.com/node-web-app-repo

- Push Docker Image To ECR

$ docker push aws_account_number_here.dkr.ecr.ap-south-1.amazonaws.com/node-web-app-app:latest

Step 6) Create an ECS Cluster

Go to the ECS home page and click on the create cluster button:

Choose EC2 Linux + Networking and then click next:

Then enter the following information:

• name of the cluster: node-cluster
• EC2 instance type: t3-micro
• Number of instances: 1

Then choose:

• Default VPC
• Auto assign IP: Enabled
• Security group: default
• Choose one of the subnet
• And then next press Enter

Step 7) Create a new Task definition

A task is a set of metadata (memory, CPU, port mapping, environmental variables, etc) that describes how a container should be deployed.

• Click on new Task definition
• Choose EC2

Then next

Choose node-task for the name of the task definition.

• Enter 128 for memory size.
• Enter 1 vCPU for CPU Unit.
• Click Add Container:

Add the name of the container: node-container

Set the image URI that we have saved to add the end of the add image step

• Set the port mappings 6565:5000

Click create.

• Then go to Run Task

The task is now running:

If we click on the container instance:

We can modify the security group associated with the instance to open the port 6565

• Add 6565 to the inbound rule for the security group:

If we try now to open the url: http://public_IP_Address:6565