Wed, 4 Aug 2010 16:37:51 -0700 On Wed, Aug 4, 2010 at 4:09 PM, Herbert Poetzl <herbert@13thfloor.at> wrote: > 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 Makes sense (when we use mount). Thanks for the clarification. > >> --Nirmal >