Docker Hosted Repository

Go to repositories and click Create repository
Select docker(hosted)
Type the repository name.
Select HTTP as repository connector on port 8082.
Finally, click Create repository at the bottom.

Push an image to Nexus

Tag the image to repository url with HTTP connector port:

docker tag <IMAGE>:<VERSION> <EC2_PUBLIC_IP>:8082/<IMAGE>:<VERSION>

Then, edit docker daemon to insecure connection via HTTP.

sudo vim /etc/docker/daemon.json

Add this and restart the docker service.

{
  "insecure-registries": ["<EC2_PUBLIC_IP>:8082" # hosted repo
  ]
}

systemctl restart docker

When you specify --restart always in docker run command, the container will also always start on daemon startup, regardless of the current state of the container. If docker service is not running, after restart the service, start the container again:

docker ps -a # Get ID or name of container
docker start <nexus-container>

If access to a repository requires the user to be authenticated, Docker will check for authentication access in the .docker/config.jsonfile on your local machine. If authentication is not found, you will need to perform a docker login command.

docker login -u <username> <EC2_PUBLIC_IP>:8082

Then, push the image:

docker push <EC2_PUBLIC_IP>:8082/<IMAGE>:<VERSION>