I've got a new 6.0 box and have setup some jails. I'd like to share
/usr/ports from the host, to each of the jails.
I tried mount_unionfs and while it worked, the box would crash if I did
anything intensive (ie. compile a port).
Googling around and people say they are using nullfs okay, but the
manpage
ends with:
THIS FILE SYSTEM TYPE IS NOT YET FULLY SUPPORTED (READ: IT DOESN'T
WORK)
AND USING IT MAY, IN FACT, DESTROY DATA ON YOUR SYSTEM. USE AT
YOUR
OWN
RISK. BEWARE OF DOG. SLIPPERY WHEN WET.
nullfs is fine in 6.0, and the warning has been removed.
Good to know it's cool. I'll start playing with it. The warning is
still
there though... in both 6-stable and 7-current.
http://www.freebsd.org/cgi/man.cgi?query=mount_nullfs&apropos=0&sektion=0&manpath=FreeBSD+6.0-stable&format=html
http://www.freebsd.org/cgi/man.cgi?query=mount_nullfs&apropos=0&sektion=0&manpath=FreeBSD+7.0-current&format=html
Those manpages are out of date.
http://www.freebsd.org/cgi/cvsweb.cgi/src/sbin/mount_nullfs/mount_nullfs.8
Sweet!
MFC: Remove big scary warning about nullfs state
:-)
I've set it up already and it works great.
On Fri, 3 Feb 2006, Tim Traver wrote:
How did you set it up specifically ?
and is it just fixed in 6.0 ? or does it also work in 5.4 ?
No idea about 5.4...
For 6...
/etc/rc.conf:
jail_sandbox_rootdir="/local/jails/sandbox/"
jail_sandbox_hostname="sandbox.pjkh.com"
jail_sandbox_ip="123.123.123.123"
jail_sandbox_exec="/bin/sh /etc/rc"
jail_sandbox_devfs_enable="YES"
jail_sandbox_mount_enable="YES"
/etc/fstab.sandbox:
/usr/ports /local/jails/sandbox/usr/ports nullfs rw 0 0
Then once started with /etc/rc.d/jail start sandbox I have this:
% df -h
Filesystem Size Used Avail Capacity Mounted on
....
devfs 1.0K 1.0K 0B 100% /local/jails/sandbox/dev
/usr/ports 3.9G 1.9G 1.7G 52% /local/jails/sandbox/usr/ports
I also came across this afterward... which I might give a go...
http://www.freebsd.org/cgi/url.cgi?ports/sysutils/ezjail/pkg-descr
Looks like it null mounts a lot more (ie /bin /sbin, /usr/lib, etc.)
-philip
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