This action configure openssh with the host information you need to connect to a remote docker engine using ssh. It basically does two things; 1) add an entry in ~/.ssh/config with credentials and username. 2) set the DOCKER_HOST environment variable.

Required The private key will be used to connect to the remote host

Required The host IP or Domain name that has the docker engine running

Required The username to authenticate with. This use must be able to run docker commands on the target host

The ssh port to connect to the remote host. Default: 22

A URL that is used to set DOCKER_HOST environment variable