为什么Docker主机卷安装不正确？

Question

I'm running docker-machine on an El Capitan Mac. I'm trying to mount a host directory onto a specific path within a container. I've boiled my problem down to a simple test case.

docker run -it --volume=/Users/me/directory:/directory debian:jessie bash

I would expect to see the directory /directory within the container. Instead I see the directory /Users/me/directory:/directory .

How do I find the source of this problem and fix it?

EDIT: Formatting.

EDIT: I've found some more incriminating evidence. Certain paths mount correctly, others do not.

Works:

docker run -it --volume=/media/psf/Home/mounts/:/a debian:jessie bash
root@fca3f29340fe:/# ls
a  bin  boot  dev  etc  home  lib  lib64  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var

Doesn't work:

docker run -it --volume=/media/psf/Home/mounts/a:/a debian:jessie bash
root@5d841d1ac9c6:/# ls
bin  boot  dev  etc  home  lib  lib64  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
root@5d841d1ac9c6:/# ls /media/psf/Home/mounts
a:
root@5d841d1ac9c6:/# ls /media/psf/Home/mounts/a\:
a

Answer 1

Try like that:

root@:~# docker run -it -v /root/a/:/tmp/a debian:jessie bash
root@e73a28616b51:/# ls /tmp/
a

I've added "/" at the end of the host path and it worked.