How to get the mapped port on host from a docker container?

Question

I want to run a task in some docker containers on different hosts. And I have written a manager app to manage the containers(start task, stop task, get status, etc...) . Once a

Answer 1

You can also you docker port container_id

The doc

https://docs.docker.com/reference/commandline/port/

examples from the doc

$ docker port test
7890/tcp -> 0.0.0.0:4321
9876/tcp -> 0.0.0.0:1234
$ docker port test 7890/tcp
0.0.0.0:4321
$ docker port test 7890/udp
2014/06/24 11:53:36 Error: No public port '7890/udp' published for test
$ docker port test 7890
0.0.0.0:4321