How can I grab exposed port from inspecting docker container?
Execute the command: docker inspect --format="{{json .Config.ExposedPorts }}" src_python_1
Result: {"8000/tcp":{}}
Proof (using docker ps):
e5e917b59e15 src_python:latest "start-server" 22 hours ago Up 22 hours 0.0.0.0:8000->8000/tcp src_python_1
It is not easy as with ip address as one container can have multiple ports, some exposed and some not, but this will get it:
sudo docker inspect name | grep HostPort | sort | uniq | grep -o [0-9]*If more than one port is exposed it will be displayed on a new line.
There are two good options depending on your taste: docker port my-container 1234 | grep -o [0-9]*$ and docker inspect --format='{{(index (index .NetworkSettings.Ports "1234/tcp") 0).HostPort}}' my-container