https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244068
Bug ID: 244068
Summary: Boot environment doesn't work without
vfs.root.mountfrom
Product: Base System
Version: 12.1-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: misc
Assignee: b...@freebsd.org
Reporter: greencopperm...@yandex.com
I don't know if this is perhaps because I'm using a couple of GELI disks in a
mirror, but when I create a boot environment and activate it I cannot boot from
it unless I also set "vfs.root.mountfrom" in /boot/loader.conf to the boot
environment I want to boot from.
Also the environments doesn't show up in the boot loader.
# zfs list -t all
NAME USED AVAIL REFER MOUNTPOINT
bootpool 244M 1.51G 244M /bootpool
zroot 94.2G 797G 88K /zroot
zroot@snap-2020-02-10 0 - 88K -
zroot/ROOT 5.41G 797G 88K none
zroot/ROOT@snap-2020-02-10 0 - 88K -
zroot/ROOT/default 210M 797G 5.37G /
zroot/ROOT/krita 5.20G 797G 5.18G /
zroot/ROOT/krita@snap-2020-02-10 2.54M - 5.13G -
zroot/ROOT/krita@2020-02-12-06:41:25-0 2.05M - 5.13G -
zroot/ROOT/krita@2020-02-12-07:54:48 4.64M - 5.18G -
zroot/tmp 88K 797G 88K /tmp
zroot/usr 88.8G 797G 88K /usr
zroot/usr@snap-2020-02-10 0 - 88K -
zroot/usr/home 88.1G 797G 87.6G /usr/home
zroot/usr/home@snap-2020-02-10 502M - 83.6G -
zroot/usr/ports 710M 797G 710M /usr/ports
zroot/usr/ports@snap-2020-02-10 0 - 710M -
zroot/usr/src 88K 797G 88K /usr/src
zroot/usr/src@snap-2020-02-10 0 - 88K -
zroot/var 1.19M 797G 88K /var
zroot/var@snap-2020-02-10 0 - 88K -
zroot/var/audit 88K 797G 88K /var/audit
zroot/var/audit@snap-2020-02-10 0 - 88K -
zroot/var/crash 88K 797G 88K /var/crash
zroot/var/crash@snap-2020-02-10 0 - 88K -
zroot/var/log 636K 797G 480K /var/log
zroot/var/log@snap-2020-02-10 156K - 428K -
zroot/var/mail 172K 797G 116K /var/mail
zroot/var/mail@snap-2020-02-10 56K - 116K -
zroot/var/tmp 144K 797G 88K /var/tmp
zroot/var/tmp@snap-2020-02-10 56K - 88K -
# mount
zroot/ROOT/default on / (zfs, local, noatime, nfsv4acls)
devfs on /dev (devfs, local, multilabel)
zroot/var/mail on /var/mail (zfs, local, nfsv4acls)
zroot/usr/home on /usr/home (zfs, local, noatime, nfsv4acls)
bootpool on /bootpool (zfs, local, nfsv4acls)
zroot/var/audit on /var/audit (zfs, local, noatime, noexec, nosuid, nfsv4acls)
zroot/usr/src on /usr/src (zfs, local, noatime, nfsv4acls)
zroot/var/crash on /var/crash (zfs, local, noatime, noexec, nosuid, nfsv4acls)
zroot/var/log on /var/log (zfs, local, noatime, noexec, nosuid, nfsv4acls)
zroot/tmp on /tmp (zfs, local, noatime, nosuid, nfsv4acls)
zroot on /zroot (zfs, local, noatime, nfsv4acls)
zroot/var/tmp on /var/tmp (zfs, local, noatime, nosuid, nfsv4acls)
zroot/usr/ports on /usr/ports (zfs, local, noatime, nosuid, nfsv4acls)
# bectl list
BE Active Mountpoint Space Created
default NR / 5.40G 2020-02-02 02:37
krita - - 13.0M 2020-02-12 07:54
# bectl activate krita
successfully activated boot environment krita
# bectl list
BE Active Mountpoint Space Created
default N / 214M 2020-02-02 02:37
krita R - 5.20G 2020-02-12 07:54
If I then do a reboot I get a kernel panic with:
mountroot: unable to remount devfs under /dev (error2)
mountroot: unable to unlink /dev/dev (error2)
init not found...
panic: no init
If during boot I drop into the loader and manually do:
set vfs.root.mountfrom="zfs:zroot/ROOT/krita"
boot
Then it works.
I noticed that before I attempted any of this the installer had set
vfs.root.mountfrom="zfs:zroot/ROOT/default" in /boot/loader.conf
Kind regards
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