Pulling And Running Docker Images From Docker Hub

Once an image is pushed to Docker Hub, any machine with Docker can pull and run it.

This is the real power of Docker: build once, share the image, and run the same packaged application somewhere else.

Pull an image

Use:

docker pull username/maven-web-app:1.0

Docker downloads the image layers and stores them locally.

Check:

docker images

Run the pulled image

Start a container:

docker run -d -p 8080:8080 --name pulled-app username/maven-web-app:1.0

Open:

http://localhost:8080

If you are running this on AWS EC2, open:

http://ec2-public-ip:8080

Make sure the EC2 security group allows port 8080.

Pull is automatic with docker run

If the image is not present locally, this command can pull it automatically:

docker run username/maven-web-app:1.0

Still, using docker pull first is useful while learning because it makes the steps clear.

Useful checks

Use:

docker ps
docker logs pulled-app
docker stop pulled-app
docker rm pulled-app

These commands help confirm the container is running and clean it up when done.

Written By: Shiva Srivastava