is it possible to mount a host directory as a volume on a running docker container?

english
#1

I only found instructions on how to run a container and mount a volume at the same time:

$ sudo docker run -d -P --name web -v /src/webapp:/opt/webapp training/webapp python app.py

Taken from the user guide.

But I don't know the command to run once the container is running.

#2

This is not possible with the current version of docker. All volumes, links, networking, etc. need to be configured when the container starts.

Follow this docker pull request for when this functionality may end up being merged.

#3

Why would you need this ?