[Bug 1420584] Re: "error: invalid segment." (with btrfs on LVM on LUKS)
Marcus Tomlinson
marcus.tomlinson at canonical.com
Thu Mar 5 12:34:44 UTC 2020
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** Changed in: grub2 (Ubuntu)
Status: Triaged => Incomplete
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https://bugs.launchpad.net/bugs/1420584
Title:
"error: invalid segment." (with btrfs on LVM on LUKS)
Status in grub2 package in Ubuntu:
Incomplete
Bug description:
This is an attempt to install grub2 on a system which has boot and root partitions inside a LVM which in turn is all inside a LUKS container (details below at the end).
Using grub git version (latest of today Feb 11th 2015, I don't know the commit hash)
The relevant errors are this:
error: invalid segment.
grub2-install: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/bu7oYe-uBNK-xWYQ-wIZD-fk1K-fBeb-pSkvNO' not found.
error: invalid segment.
/usr/sbin/grub2-probe: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/sKk47H-AmYx-0iXJ-Tb1a-hy3d-tuaf-ly2AVY' not found.
Full details below:
--------
(chroot1) livecd / # grub2-install --force --compress=xz
--target=i386-pc --recheck --debug --locales= --fonts= --boot-
directory=/but --no-rs-codes --modules="part_gpt crypto cryptodisk lvm
btrfs" -- /dev/sda >/tmp/out.txt 2>&1
Installing for i386-pc platform.
grub2-install: info: cannot open `/but/grub/device.map': No such file or directory.
grub2-install: info: compressing `/usr/lib/grub/i386-pc/disk.mod' -> `/but/grub/i386-pc/disk.mod'.
[..snip..]
see attachment for this snipped part, because I got this error(submitting bug):
The description is too long. If you have lots of text to add, attach a file to the bug instead.
[..snip..]
grub2-install: info: drive = -1.
grub2-install: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/bu7oYe-uBNK-xWYQ-wIZD-fk1K-fBeb-pSkvNO' not found.
(chroot1) livecd / # grub2-mkconfig -o /but/grub/grub.cfg
>>/tmp/out.txt
Generating grub configuration file ...
Found linux image: /but/kernel-genkernel-x86_64-3.19.0-gentoo
Found initrd image: /but/initramfs-genkernel-x86_64-3.19.0-gentoo
error: invalid segment.
/usr/sbin/grub2-probe: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/sKk47H-AmYx-0iXJ-Tb1a-hy3d-tuaf-ly2AVY' not found.
error: invalid segment.
/usr/sbin/grub2-probe: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/sKk47H-AmYx-0iXJ-Tb1a-hy3d-tuaf-ly2AVY' not found.
error: invalid segment.
/usr/sbin/grub2-probe: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/sKk47H-AmYx-0iXJ-Tb1a-hy3d-tuaf-ly2AVY' not found.
done
(chroot1) livecd / # mount
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=10240k,nr_inodes=1022258,mode=755)
devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run type tmpfs (rw,nosuid,nodev,relatime,size=818508k,mode=755)
shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime)
/dev/mapper/vgall-rootlvol on / type btrfs (rw,relatime,ssd,autodefrag,compress=lzo,datasum,datacow,space_cache,commit=300)
/dev/mapper/vgall-bootlvol on /but type btrfs (rw,relatime,nosuid,nodev,noexec,ssd,autodefrag,compress=lzo,datasum,datacow,space_cache,commit=300)
tmpfs on /tmp type tmpfs (rw,nosuid,relatime,nodev,size=7G,mode=1777)
/tmp on /var/tmp type none (rw,bind,rbind)
tmpfs on /var/tmp/portage type tmpfs (rw,nosuid,relatime,nodev,size=7G,mode=775,uid=250,gid=250)
(chroot1) livecd / # lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 25G 0 disk
├─sda1 8:1 0 2M 0 part
└─sda2 8:2 0 25G 0 part
└─lvm_on_luks_on_sda2 253:0 0 25G 0 crypt
├─vgall-bootlvol 253:1 0 128M 0 lvm /but
└─vgall-rootlvol 253:2 0 24.9G 0 lvm /
sr0 11:0 1 208M 0 rom
loop0 7:0 0 178.3M 1 loop
(chroot1) livecd / # cryptsetup luksDump /dev/sda2 |grep UUID
UUID: b904d6c0-4b05-4c9f-a468-f9242faba2df
(chroot1) livecd / # pvdisplay
--- Physical volume ---
PV Name /dev/disk/by-id/dm-name-lvm_on_luks_on_sda2
VG Name vgall
PV Size 24.99 GiB / not usable 2.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 6398
Free PE 0
Allocated PE 6398
PV UUID 9qjZyk-gLkH-pVXM-B1d6-NpCn-pHH9-mZCfXb
(chroot1) livecd / # vgdisplay
--- Volume group ---
VG Name vgall
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 24.99 GiB
PE Size 4.00 MiB
Total PE 6398
Alloc PE / Size 6398 / 24.99 GiB
Free PE / Size 0 / 0
VG UUID 31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO
(chroot1) livecd / # lvdisplay
--- Logical volume ---
LV Path /dev/vgall/bootlvol
LV Name bootlvol
VG Name vgall
LV UUID bu7oYe-uBNK-xWYQ-wIZD-fk1K-fBeb-pSkvNO
LV Write Access read/write
LV Creation host, time livecd, 2015-02-10 04:39:58 +0100
LV Status available
# open 1
LV Size 128.00 MiB
Current LE 32
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/vgall/rootlvol
LV Name rootlvol
VG Name vgall
LV UUID sKk47H-AmYx-0iXJ-Tb1a-hy3d-tuaf-ly2AVY
LV Write Access read/write
LV Creation host, time livecd, 2015-02-10 04:40:02 +0100
LV Status available
# open 1
LV Size 24.87 GiB
Current LE 6366
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
(chroot1) livecd / # time FEATURES="-stricter" USE="-themes debug mount" emerge -pvq grub
[ebuild R ] sys-boot/grub-9999-r1 USE="debug device-mapper fonts mount multislot -doc -efiemu -libzfs -nls -sdl -static {-test} -themes -truetype" GRUB_PLATFORMS="pc -coreboot -efi-32 -efi-64 -emu -ieee1275 -loongson -multiboot -qemu -qemu-mips -xen"
(chroot1) livecd / # fdisk -l /dev/sda
Disk /dev/sda: 25 GiB, 26843545600 bytes, 52428800 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 5E5F0B83-AE3E-4291-A6C4-35E640505DB8
Device Start End Size Type
/dev/sda1 2048 6143 2M BIOS boot partition
/dev/sda2 6144 52426751 25G Linux filesystem
(chroot1) livecd / # uname -a
Linux livecd 3.16.5-gentoo #1 SMP Thu Dec 4 06:13:19 UTC 2014 x86_64 AMD A6-3400M APU with Radeon(tm) HD Graphics AuthenticAMD GNU/Linux
(chroot1) livecd / # cryptsetup --version
cryptsetup 1.6.6
(chroot1) livecd / # grub2-install --version
grub2-install (GRUB) 2.02~beta2
(chroot1) livecd / # lvm version
LVM version: 2.02.110(2) (2014-08-26)
Library version: 1.02.89 (2014-08-26)
Driver version: 4.27.0
/dev/sda2 is LUKS, then inside it there's LVM (a boot and a root, logical volumes, each of which are btrfs formatter).
tested inside virtualbox, booted from Gentoo's install-
amd64-minimal-20141204.iso , chrooted to a
stage3-amd64-hardened+nomultilib-20150108.tar.bz2
If anyone is adventurous enough, here's roughly all the steps I followed: https://github.com/emanueLczirai/coostomhuston/blob/7f19d290f1cc170fcf2e5eb47238fb788686e3a5/texts/gentoo_vm.wofl
(I think only this step is missing: time emerge -av libgcrypt coreutils glibc )
Note that --force to grub2-install has no effect(in this grub git
version), although version from package grub-2.02_beta2-r7:2 (~amd64)
acts as if --force was given(even though it was not) and both
grub2-install and grub2-mkconfig do not complain, but upon booting it
cannot find kernel file.
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