How do i expose all open ports on a docker container?

shoebill

Using the -P option:

       -P, --publish-all=true|false
          Publish all exposed ports to random ports on the host interfaces. The default is false.

Run a container with the -P option.

$ docker run -d -P nginx
07d4faa53b188b49d4ea6cd48ba7d6f2e75eaa2d423f6a0a01aaa85945b70ec5

Check the port mapping.

$ docker port 07d4faa53b18 
80/tcp -> 0.0.0.0:32773