Date: Wed, 20 May 2015 14:26:35 -0400 From: Allan Jude <allanjude@freebsd.org> To: freebsd-hackers@freebsd.org Subject: Re: FreeBSD Boot Environments Message-ID: <555CD1DB.6010807@freebsd.org> In-Reply-To: <20150520181006.GB21070@zxy.spb.ru> References: <20150520181006.GB21070@zxy.spb.ru>
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On 2015-05-20 14:10, Slawa Olhovchenkov wrote:
> I am try to use Boot Environments and have some misundertanding.
> As I see beadm manage only zroot/ROOT. But base upgrade touch not only
> /{boot,etc,bin,lib,libexec,rescue,sbin} but also /usr and from time to
> time /var. And don't touch (at most) /root.
>=20
> What correct way to use Boot Environments?
> Rename zfs datasets as:
>=20
> From To
> zroot/usr zroot/ROOT/default/usr
> zroot/usr/home zroot/home
>=20
> create
>=20
> zroot/root
>=20
> leave (rename after moving zroot/usr)
>=20
> zroot/usr/ports
> zroot/usr/src
> zroot/usr/local
>=20
> Or somehow else?
>=20
> How prepare upgrades for such install?
>=20
> Create model setup, witch similar enviroment
> zfs snap modelroot@N
> do install{world,kernel} DESTDIR=3D/modelroot
> do mergemaster -I -U -D /modelroot
> zfs send -i N-1 modelroot@N | ssh host zfs recv zroot/ROOT/new
>=20
> Or somehow else?
> _______________________________________________
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> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.o=
rg"
>=20
The typical way (done by bsdinstall) is that your zroot/usr dataset, is
set 'canmount=3Doff', and only exists for you to create child datasets.
Any files written to /usr/bin etc, actually end up going to the
ROOT/default dataset
you can tell by looking at 'zfs list' and your zroot/usr is only like
200kb, instead of 100s of megabytes. It also won't be listed in the
output of 'mount'.
--=20
Allan Jude
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