Source: partman-auto-lvm
Version: 85
Severity: normal
Tags: d-i
X-Debbugs-Cc: ssg...@debian.org
While updating some d-i preseed configs from stretch to bullseye, I
found that previously working partman configs no longer produce the
expected output. For example, on a 3.5T disk, I have the following
partman config:
boot-root :: \
538 538 538 ext4 \
$primary{ } \
$bootable{ } \
method{ format } \
format{ } \
use_filesystem{ } \
filesystem{ ext4 } \
mountpoint{ /boot } \
. \
21475 21475 21475 ext4 \
lv_name{ root } \
method{ lvm } \
format{ } \
use_filesystem{ } \
filesystem{ ext4 } \
mountpoint{ / } \
$lvmok{ } \
. \
1024 1024 -1 ext4 \
lv_name{ var } \
method{ lvm } \
format{ } \
use_filesystem{ } \
filesystem{ ext4 } \
mountpoint{ /var } \
$lvmok{ } \
.
I would expect this to produce the following:
- 512M /boot
- LVM VG filling the rest of the disk with:
- 20G /
- 3.4T /var (rest of the disk)
That is what happens in stretch and earlier (and maybe buster, I haven't
tested). In the bullseye installer I end up with the following:
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 3.5T 0 disk
├─sda1 8:1 0 512M 0 part /boot
└─sda2 8:2 0 3.5T 0 part
├─vg0-root 254:0 0 20G 0 lvm /
└─vg0-var 254:1 0 976M 0 lvm /var
In trying to track down this bug, I found that
partman-auto-lvm/guided_size was added and according to
https://salsa.debian.org/installer-team/partman-auto-lvm/-/blob/master/debian/partman-auto-lvm.templates#L77-L79,
defaults to a value of "some number". Unsurprisingly, this is not a
valid number configuration option, so the maximum size doesn't get set
properly. Setting "d-i partman-auto-lvm/guided_size string max" in my
preseed restores the previous behavior. I believe there are two issues
here:
1. "partman-auto-lvm/guided_size" should default to "max" in order to
maintain compatibility with previous releases.
2. When "partman-auto-lvm/guided_size" is set to an invalid value it
seems that the code does not behave properly. I'm not sure what behavior
I'd expect, but I don't think the behavior I am seeing of picking the
minimum size for each partition is correct.
Thanks!
Stephen
-- System Information:
Debian Release: bookworm/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 5.16.0-1-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL
set to en_US.UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
