8 messages in org.freebsd.freebsd-jailRe: bizarre mount_nullfs issue with j...| From | Sent On | Attachments |
|---|---|---|
| Dan Naumov | Apr 6, 2010 2:29 pm | |
| Glen Barber | Apr 6, 2010 2:36 pm | |
| Dan Naumov | Apr 6, 2010 2:42 pm | |
| Mars G Miro | Apr 6, 2010 8:48 pm | |
| Dan Naumov | Apr 6, 2010 11:28 pm | |
| Mars G Miro | Apr 6, 2010 11:42 pm | |
| Aiza | Apr 7, 2010 12:09 am | |
| Dan Naumov | Apr 7, 2010 4:01 am |
| Subject: | Re: bizarre mount_nullfs issue with jails / ezjail | |
|---|---|---|
| From: | Dan Naumov (dan....@gmail.com) | |
| Date: | Apr 6, 2010 2:42:46 pm | |
| List: | org.freebsd.freebsd-jail | |
On Wed, Apr 7, 2010 at 12:37 AM, Glen Barber <glen...@gmail.com> wrote:
Hi Dan,
Dan Naumov wrote:
So, I want the basejail to only contain the world and link the ports tree from the host into each individual jail when it's time to update the ports inside them, but I am running into a bit of a bizarre issue: I can mount_nullfs /usr/ports elsewhere on the host just fine, but it doesn't work if I try to mount_nullfs it to /usr/ports inside the jail:
mount_nullfs /usr/ports/ /usr/ports2
df -H | grep ports cerberus/usr-ports 34G 241M 34G 1% /usr/ports cerberus/usr-ports-distfiles 34G 0B 34G 0% /usr/ports/distfiles cerberus/usr-ports-packages 34G 0B 34G 0% /usr/ports/packages /usr/ports 34G 241M 34G 1% /usr/ports2
mount | grep ports cerberus/usr-ports on /usr/ports (zfs, local) cerberus/usr-ports-distfiles on /usr/ports/distfiles (zfs, local) cerberus/usr-ports-packages on /usr/ports/packages (zfs, local) /usr/ports on /usr/ports2 (nullfs, local)
mount_nullfs /usr/ports/ /usr/jails/semipublic/usr/ports mount_nullfs: /basejail: No such file or directory
What is going on here? I also note that the error actually wants a /basejail on the host, which is even more bizarre:
mount_nullfs /usr/ports/ /usr/jails/semipublic/usr/ports mount_nullfs: /basejail: No such file or directory
mkdir /basejail
mount_nullfs /usr/ports/ /usr/jails/semipublic/usr/ports mount_nullfs: /basejail/usr: No such file or directory
Yet, this works:
mkdir /usr/jails/semipublic/test mount_nullfs /usr/ports/ /usr/jails/semipublic/test umount /usr/jails/semipublic/test
Any ideas?
The ports directory in an ezjail is a link to /basejail/usr/ports (in the jail).
Breaking the link (from the host) allows the mount to work successfully.
orion# ll usr/ports lrwxr-xr-x 1 root wheel 19 Mar 8 18:06 usr/ports -> /basejail/usr/ports orion# unlink usr/ports orion# mkdir usr/ports orion# mount_nullfs /usr/ports usr/ports orion#
Regards,
-- Glen Barber
Thanks for the tip.
An additional question: how come "sade" and "sysinstall" which are run inside the jail can see (and I can only assume they can also operate on and damage) the real underlying disks of the host?
- Sincerely Dan Naumov
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