To be able to push a Docker image to Docker Hub, we need to log in to our account with the Docker CLI.

You’ll need a Docker Hub account for this - if you don’t have one, browse to https://hub.docker.com and follow the link to sign up for an account.

docker login -u <username> -p <password>

Enter your Docker Hub username & password.

We have successfully logged in.

I have an image called node-server in my system. I can’t push this image to Docker Hub because this image reference doesn’t have an account name. So, I have to create a new reference for node-server. Note that one image can have multiple references.

docker image tag node-server sundaray/node-server:v1

sundaray is my Docker Hub username. Also, I have tagged the image reference as version 1.

Now, we can push our image.

docker image push <Docker Hub username>/node-server:v1

For each image we push to Docker Hub, Docker Hub will automatically create a repository. And by default, the repository will have public read rights. Now anyone can find, pull and use the node-server:v1 application.

If I log in to my Docker Hub account, I can see the image.