On Wed, Aug 04, 2010 at 02:24:30PM -0700, Nirmal Guhan wrote: > On Wed, Aug 4, 2010 at 9:25 AM, Herbert Poetzl <herbert@13thfloor.at> wrote: > > On Wed, Aug 04, 2010 at 04:20:14PM +0200, raflik-nb wrote: > >> Hello, I am a new user of vserver (on Debian) and found this in FAQ: > > > >> === > >> How can I copy anything from host to guest partition, normally > >> unvisible on host? > > ~~~~~~~~~~~ (should be invisible, but hey :) > >> You should just change namespace, e.g.: > > > >> vnamespace --enter <xid> -- /bin/bash > >> and then use standard cp or rsync programs. > >> === > > > >> What I see is the guest filesystem in /var/lib/<vserver> > > > > which means it is _visible_ on the host > > > >> and I can copy files there which are instantly visible > >> from the guest. > > > > which is expected ... > > > >> What issue does that piece of advice actually address? > > > > mainly filesystems not mounted on the host, like > > for example the /tmp (tmpfs) only mounted inside > > the guest (or other filesystems not shared with > > the host namespace) > > > >> I find it a bit confusing. > > > > hope this clarifies, > > Herbert > > > >> Greets, > >> raflik > How different is this from doing a "cp <somefile> <rootfs path of > guest/somedirectory>" from host ? that it ends up in the host filesystem instead of the filesystem mounted in the guest (at the same location)? example: guest at /vservers/guest1 mounts /dev/vg/usr on /vservers/guest1/usr in the guest configs fstab like this: /dev/vg/usr /usr ext3 default 0 0 now, when you start the guest, util-vserver will mount the /usr entry in the guest namespace, still on the host the /vservers/guest1/usr dir will be empty (the mount doesn't 'exist' on the host) ... echo test >/vservers/guest1/usr/test will create a file on the host filesystem _under_ the /usr mounted inside the guest, and so the file will not be visible inside the guest (unless you unmount /usr) and similar echo test >/usr/test2 (inside the guest) will not be visible on the host as /vservers/guest1/usr simply is not there in the host namespace ... HTH, Herbert > --Nirmal