How to connect to Docker API from another machine?

Question

I\'m trying to use the Docker API to connect to docker daemon from another machine. I am able to do this command successfully:

docker -H=tcp://127.0.0.1:4243         


        

Answer 1

There are 2 ways in configuring the docker daemon port

1) Configuring at /etc/default/docker file:

DOCKER_OPTS="-H tcp://127.0.0.1:5000 -H unix:///var/run/docker.sock"

2) Configuring at /etc/docker/daemon.json:

{
"hosts": ["tcp://:", "unix:///var/run/docker.sock"]
}

IP-ADDRESS - any address which is accessible can be used.

Restart the docker service after configuring the port.

The reason for adding both the user port[ tcp://127.0.0.1:5000] and default docker socket[unix:///var/run/docker.sock] is that the user port enables the access to the docker APIs whereas the default socket enables the CLI.