How to push Docker Image to Public and Private AWS ECR Repository

In this short tutorial we will see how we can push a Docker Image to a private or public registry in ECR.

Step 1: Create an AWS ECR Repository

A Private Repository: It will be managed and accessed by IAM and Registry Policy Permissions and not be accessible by everyone.

OR

A public Repository: It will be accessible by everyone.

Created Repository
Private ECR Repo:

Public ECR Repo:

Step 2: Prepare Docker Image to be pushed to ECR

I have taken an example of a simple Nodejs application got from the internet and created an image on Docker Desktop using following command from the directory where DOCKERFILE for my app is present.

docker image build -t simple-nodejs-app.

Tag the image before pushing to ECR
For Private ECR Repo

docker tag simple-nodejs-app:latest 197317184204.dkr.ecr.us-east-1.amazonaws.com/simple-nodejs-app:latest

For Public ECR Repo

docker tag simple-nodejs-app:latest public.ecr.aws/n4o6g6h8/simple-nodejs-app:latest

Step 3: Authenticate Docker to AWS ECR

You will need AWS credentials configured and required IAM permissions to that AWS user.
For Private ECR Repo:

aws ecr get-login-password --region us-east-1 | docker login --username AWS --password-stdin 197317184204.dkr.ecr.us-east-1.amazonaws.com

For Public ECR Repo:

aws ecr-public get-login-password --region us-east-1 | docker login --username AWS --password-stdin public.ecr.aws/n4o6g6h8

Step 4: Push Image to ECR

For Private ECR Repo:

docker push 197317184204.dkr.ecr.us-east-1.amazonaws.com/simple-nodejs-app:latest

For Public ECR Repo:

docker push public.ecr.aws/n4o6g6h8/simple-nodejs-app:latest

Image pushed to Private ECR Repo

Image pushed to Public ECR Repo

Screenshot

And the image is ready to be used in a container started in an ECS or EKS cluster.