Dockport reported an error.

  docker, question

When mapping a container’s port using “DockPort Container id Container Port”, the system reported the following error:

*[root@DockerServer ~]# docker port e7d817698b6f 80
2014/04/06 16:08:07 Error: No public port ’80’ published for e7d817698b6f

What is the reason, do you know?

Is the port of the container not EXPOSE in advance?