Re: [atomic-devel] NFS in atomic host

["Stephen C. Tweedie" <sct redhat com>]

Hi,

On Tue, 2014-10-28 at 16:12 -0400, Sami Wagiaalla wrote:

> I have been playing around with creating a container which provides 
> support for nfs but I quickly ran into the issue that the mount 
> namespace of the container is different from that of the host so no 
> mounts done inside the container are visible to the host. I have not 
> found a way to work around this.

It's not completely straightforward, but it is possible if you set up
the container correctly.  

You can map the root /proc into a container, and then use that to
re-enter the root mount namespace with nsenter:

        -bash-4.2# mount|grep test
        -bash-4.2# docker run --privileged --rm -ti -v /proc:/sysproc fedora bash
        [root f8fe3faaf4e1 /]# nsenter --mount=/sysproc/1/ns/mnt -- mount -t tmpfs tmpfs /var/mnt/test
        [root f8fe3faaf4e1 /]# exit
        -bash-4.2# mount|grep test
        tmpfs on /var/mnt/test type tmpfs (rw,relatime,seclabel)
        -bash-4.2# 

--Stephen