Re: Mount order for ZFS, jails, and nullfs
On 09/24/2010 11:03 AM, Torbjorn Granlund wrote: ... Unfortunately, FreeBSD's mount seems unable to perform mounts of ZFS volumes. Sure, it can: 8 (f84104b2)[r...@akisha ~]# zfs create akisha/mnttmp (f84104b2)[r...@akisha ~]# touch /zfs/akisha/mnttmp/test (f84104b2)[r...@akisha ~]# ls -l /zfs/akisha/mnttmp total 1 -rw-r--r-- 1 root wheel - 0 Sep 25 01:39 test (f84104b2)[r...@akisha ~]# zfs set mountpoint=legacy akisha/mnttmp (f84104b2)[r...@akisha ~]# ls -l /zfs/akisha/mnttmp ls: /zfs/akisha/mnttmp: No such file or directory (f84104b2)[r...@akisha ~]# mount -t zfs akisha/mnttmp /mnt/tmp (f84104b2)[r...@akisha ~]# ls -l /mnt/tmp total 1 -rw-r--r-- 1 root wheel - 0 Sep 25 01:39 test (f84104b2)[r...@akisha ~]# umount /mnt/tmp (f84104b2)[r...@akisha ~]# ls -l /mnt/tmp total 0 (f84104b2)[r...@akisha ~]# 8 On 8.1-RELEASE. -- Fuzzy love, -CyberLeo Technical Administrator CyberLeo.Net Webhosting http://www.CyberLeo.Net cyber...@cyberleo.net Furry Peace! - http://.fur.com/peace/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Mount order for ZFS, jails, and nullfs
From owner-freebsd-questi...@freebsd.org Fri Sep 24 11:02:59 2010
To: freebsd-questions@freebsd.org
From: Torbjorn Granlund t...@gmplib.org
Date: Fri, 24 Sep 2010 18:03:06 +0200
Subject: Mount order for ZFS, jails, and nullfs
In jails, I'd like a local ZFS /, a read-only nullfs-mounted /usr, and a
local /usr/local. (I'd also have read-only nullfs-mounted /bin, /lib,
/libexec, but let's forget about that for now.)
This way, I can upgrade the master /usr once, in one place, and have all
jails inherit it. And my dear jail inmates can install anything in
/usr/local (such as their favourite packages/ports).
I.e., things should look like this:
/myjail/zfs
/myjail/usr nullfs ro
/myjail/usr/local zfs
There is no problem to make this happen by issuing a handful of commands
manually after boot, but I cannot seem to get it to work automatically,
with existing boot mechanism. The problem is that the mount of /usr
will be attempted before ZFS has mounted /myjail, the jail's root.
ZFS maintains its own mount table. It is possible to disable the
automated mounting in ZFS by specifying the pseudo mountpoint legacy,
and then--according to the FreeBSD manual--mount it with mount(8).
Unfortunately, FreeBSD's mount seems unable to perform mounts of ZFS
volumes.
How can I achieve the result I want after a reboot?
if the traditional way doesn't work for you, the solution is don't use
the traditional way'. grin?
Seriously.
For the stuff that has to mount _after_ zfs is running (i.e. '/myjail/usr'),
mark them as 'noauto' in the fstab.
Do the 'equivalent' for any zfs fs that mounts _below_ those points (i.e.,
'/myjail/user/local').
That way the normal stages in the boot process will _not- mount them
prematurely.
THEN, add a boot script that requires zfs' and wherever the actual zfs
mounts are done. In -that- script, insert 'manual' commands, _in_the_order_
you need things to happen in.
It is advisable to drop notes in /etc/fstab and the zfs equivalent, that
these filesystems are automatically mounted by the {mumble} script. Such
notes save _lots_ of hair-tearing in the future, when you have to trouble-
shoot something you don't remember the details of doing.
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Mount order for ZFS, jails, and nullfs
In jails, I'd like a local ZFS /, a read-only nullfs-mounted /usr, and a local /usr/local. (I'd also have read-only nullfs-mounted /bin, /lib, /libexec, but let's forget about that for now.) This way, I can upgrade the master /usr once, in one place, and have all jails inherit it. And my dear jail inmates can install anything in /usr/local (such as their favourite packages/ports). I.e., things should look like this: /myjail/zfs /myjail/usr nullfs ro /myjail/usr/local zfs There is no problem to make this happen by issuing a handful of commands manually after boot, but I cannot seem to get it to work automatically, with existing boot mechanism. The problem is that the mount of /usr will be attempted before ZFS has mounted /myjail, the jail's root. ZFS maintains its own mount table. It is possible to disable the automated mounting in ZFS by specifying the pseudo mountpoint legacy, and then--according to the FreeBSD manual--mount it with mount(8). Unfortunately, FreeBSD's mount seems unable to perform mounts of ZFS volumes. How can I achieve the result I want after a reboot? (The reply use ezjail! is not the right one. :-) It does not do what I want to do. I dislike its symlink forest, and that it creates just one ZFS filesystem for the entire jail.) -- Torbjörn ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Mount order for ZFS, jails, and nullfs
krad kra...@gmail.com writes: use zfs mount/umount How? The zfs mount command does not work anyting like the mount(8) command but for ZFS volumes. The zfs mount mounts a volume using its mountpoint property. But if that's set to legacy, then zfs mount will hardly work, since it cannot take a mount point parameter. The real problem is how to make all types of mounts to be made in a top-to-bottom order. Even if 'zfs mount' would work like I think you assume it works, that would not help, as far as I can tell. -- Torbjörn ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Mount order for ZFS, jails, and nullfs
On 24 September 2010 17:03, Torbjorn Granlund t...@gmplib.org wrote: In jails, I'd like a local ZFS /, a read-only nullfs-mounted /usr, and a local /usr/local. (I'd also have read-only nullfs-mounted /bin, /lib, /libexec, but let's forget about that for now.) This way, I can upgrade the master /usr once, in one place, and have all jails inherit it. And my dear jail inmates can install anything in /usr/local (such as their favourite packages/ports). I.e., things should look like this: /myjail/zfs /myjail/usr nullfs ro /myjail/usr/local zfs There is no problem to make this happen by issuing a handful of commands manually after boot, but I cannot seem to get it to work automatically, with existing boot mechanism. The problem is that the mount of /usr will be attempted before ZFS has mounted /myjail, the jail's root. ZFS maintains its own mount table. It is possible to disable the automated mounting in ZFS by specifying the pseudo mountpoint legacy, and then--according to the FreeBSD manual--mount it with mount(8). Unfortunately, FreeBSD's mount seems unable to perform mounts of ZFS volumes. How can I achieve the result I want after a reboot? (The reply use ezjail! is not the right one. :-) It does not do what I want to do. I dislike its symlink forest, and that it creates just one ZFS filesystem for the entire jail.) -- Torbjörn ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org use zfs mount/imount ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Mount order for ZFS, jails, and nullfs
On 24 September 2010 18:52, krad kra...@gmail.com wrote: On 24 September 2010 17:03, Torbjorn Granlund t...@gmplib.org wrote: In jails, I'd like a local ZFS /, a read-only nullfs-mounted /usr, and a local /usr/local. (I'd also have read-only nullfs-mounted /bin, /lib, /libexec, but let's forget about that for now.) This way, I can upgrade the master /usr once, in one place, and have all jails inherit it. And my dear jail inmates can install anything in /usr/local (such as their favourite packages/ports). I.e., things should look like this: /myjail/zfs /myjail/usr nullfs ro /myjail/usr/local zfs There is no problem to make this happen by issuing a handful of commands manually after boot, but I cannot seem to get it to work automatically, with existing boot mechanism. The problem is that the mount of /usr will be attempted before ZFS has mounted /myjail, the jail's root. ZFS maintains its own mount table. It is possible to disable the automated mounting in ZFS by specifying the pseudo mountpoint legacy, and then--according to the FreeBSD manual--mount it with mount(8). Unfortunately, FreeBSD's mount seems unable to perform mounts of ZFS volumes. How can I achieve the result I want after a reboot? (The reply use ezjail! is not the right one. :-) It does not do what I want to do. I dislike its symlink forest, and that it creates just one ZFS filesystem for the entire jail.) -- Torbjörn ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org use zfs mount/imount whops s/i/u/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: ZFS jails
On 08/21/2010 23:57, Joe wrote: I am thinking about running zfs on the host for everything except booting the system. I plan to create a 1gb zfs area which I want to use for a jail directory tree. Is this possible? In other words, why would it not be possible ?. Have fun it sounds like you have a system that could have gave you a reply before this question had been answered here. Regards, -- jhell,v ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: ZFS jails
On 8/21/10 11:57 PM, Joe wrote: I am thinking about running zfs on the host for everything except booting the system. I plan to create a 1gb zfs area which I want to use for a jail directory tree. Is this possible? Yep. # zfs create -o quota=1G tank/usr/jail Regards, -- Glen Barber ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: ZFS jails
On 22 August 2010 13:49, Glen Barber glen.j.bar...@gmail.com wrote: On 8/21/10 11:57 PM, Joe wrote: I am thinking about running zfs on the host for everything except booting the system. I plan to create a 1gb zfs area which I want to use for a jail directory tree. Is this possible? Yep. # zfs create -o quota=1G tank/usr/jail Regards, -- Glen Barber ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org you might want the reserve as well ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
ZFS jails
I am thinking about running zfs on the host for everything except booting the system. I plan to create a 1gb zfs area which I want to use for a jail directory tree. Is this possible? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
