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Date:      Sat, 22 Mar 2014 07:40:15 -0500
From:      Bryan Drewery <bdrewery@FreeBSD.org>
To:        sysinstall@FreeBSD.org
Subject:   bsdinstall ZFS /root in wrong dataset
Message-ID:  <532D84AF.5080506@FreeBSD.org>

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(I am not subscribed so please CC me)

The ZFS layout uses the zroot/ROOT/<BE> to support boot environments.
The problem with it is that /root is part of the BE. Home directories
are properly outside of the BE.

/root should really be outside to persist history and other changes to
root's homedir through BE changes/upgrades.

This is quite noticeable if you create a new BE (beadm create; beadm
mount) and then installworld/kernel into it, then activate and reboot.
All of your history and /root changes are missing for the period between
creating the BE and rebooting.

Something like this is needed:

> --- usr.sbin/bsdinstall/scripts/zfsboot (revision 263620)
> +++ usr.sbin/bsdinstall/scripts/zfsboot (working copy)
> @@ -128,6 +128,8 @@
>=20
>         # Home directories separated so they are common to all BEs
>         /usr/home       # NB: /home is a symlink to /usr/home
> +       /root           mountpoint=3D/root
>=20
>         # Ports tree
>         /usr/ports              compression=3Dlz4,setuid=3Doff


Though, I am unsure on whether we should make a zroot/root dataset and
mount it in or mkdir /usr/home/root and symlink /root to it. The symlink
does cause mergemaster confusion though. I have no opinion on where we
create the root dataset, as long as it is outside of ROOT.

--=20
Regards,
Bryan Drewery


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