How to mount a host directory in a Docker container

Question

I am trying to mount a host directory into a Docker container so that any updates done on the host is reflected into the Docker containers.

Where am I doing somethin

Answer 1

2 successive mounts: I guess many posts here might be using two boot2docker, the reason you don't see anything is that you are mounting a directory from boot2docker, not from your host.

You basically need 2 successive mounts:

the first one to mount a directory from your host to your system

the second to mount the new directory from boot2docker to your container like this:

• 1) Mount local system on boot2docker

  sudo mount -t vboxsf hostfolder /boot2dockerfolder
  

• 2) Mount boot2docker file on linux container

  docker run -v /boot2dockerfolder:/root/containerfolder -i -t imagename
  

Then when you ls inside the containerfolder you will see the content of your hostfolder.