Hi Folks,
This does seem possible. It came up as a side issue on viewtopic.php?t=363217. I blatted my rpi5 this morning, installed 2023-10-10-raspios-bookworm-arm64.img.xz onto an sdcard, added lvm2 then copied it to a gpt lvm partioned ssd which booted. I then performed an update (which involved a kernel update) and rootfs was still bootable. I'll await another kernel update to be certain.
Should anyone desire to play with this idea then the following is the sequence of events. A major warning to casual viewers. Do NOT casually paste this into a script and fiddle with it because it WILL destroy the target device contents. Obviously 'sys-rbackup' does not exist for others. Replace with a suitable alternative (it's an rsync with suitable options). The 'sed' is not very clever but suffices for a stock rpi image.
A successful run will produce this..I think this is the module (guessing, I've not checked)..Ultimately I want a GUI app(*) to do this. In the meantime, a command line tool(**) would suffice, if there's interest?
(*) Was going to list advantages. Seems I'm away for a couple of days.![:-|]( "Neutral")
(**) I have to code for others rather than myself but much quicker than (*).
This does seem possible. It came up as a side issue on viewtopic.php?t=363217. I blatted my rpi5 this morning, installed 2023-10-10-raspios-bookworm-arm64.img.xz onto an sdcard, added lvm2 then copied it to a gpt lvm partioned ssd which booted. I then performed an update (which involved a kernel update) and rootfs was still bootable. I'll await another kernel update to be certain.
Should anyone desire to play with this idea then the following is the sequence of events. A major warning to casual viewers. Do NOT casually paste this into a script and fiddle with it because it WILL destroy the target device contents. Obviously 'sys-rbackup' does not exist for others. Replace with a suitable alternative (it's an rsync with suitable options). The 'sed' is not very clever but suffices for a stock rpi image.
Code:
foo@pi23:/wrk $ cat sdlvm#!/bin/false#umount /mnt/dev/p2#umount /mnt/dev/p1#vgremove $(hostname)#pvremove "$1""2"which pvs || exit 1[ -z "$1" ] && exit 1E=echo#chk and umount /dev/media/*$E vgchange -an -y $(hostname)$E vgremove -y $(hostname)$E pvremove "$1""2"$E parted -s "$1" mklabel gpt || exit 1$E parted -s "$1" mkpart primary 4M 516M || exit 1$E parted -s "$1" mkpart primary 516M 64G || exit 1$E parted -s "$1" name 1 bootfs || exit 1$E parted -s "$1" name 2 rootfs || exit 1$E parted -s "$1" set 1 boot on || exit 1$E parted -s "$1" set 2 lvm on || exit 1$E pvcreate "$1""2" || exit 1$E vgcreate $(hostname) "$1""2" || exit 1$E lvcreate -y -n rootfs -l 100%FREE $(hostname) || exit 1$E mkfs.vfat "$1""1" || exit 1$E mkfs.ext4 "/dev/"$(hostname)"/rootfs" || exit 1$E mkdir -p /mnt/dev/p{1,2} || exit 1$E mount "$1""1" /mnt/dev/p1 || exit 1$E mount "/dev/"$(hostname)"/rootfs" /mnt/dev/p2 || exit 1$E update-initramfs -u -k all$E DRY=" " sys-rbackup /boot/firmware/ /mnt/dev/p1/ || exit 1$E DRY=" " sys-rbackup / /mnt/dev/p2/ || exit 1$E sed -i -e "s,root=[^[:space:]]*,root=/dev/mapper/$(hostname)-rootfs," /mnt/dev/p1/cmdline.txt || exit 1$E sed -i -e "s,PART.*=.*-01[^[:space:]]*,PARTLABEL=bootfs," /mnt/dev/p2/etc/fstab || exit 1$E sed -i -e "s,PART.*=.*-02[^[:space:]]*,/dev/mapper/$(hostname)-rootfs," /mnt/dev/p2/etc/fstab || exit 1$E cat /mnt/dev/p2/etc/fstab$E umount /mnt/dev/p2 || exit 1$E cat /mnt/dev/p1/cmdline.txt$E umount /mnt/dev/p1 || exit 1Code:
foo@pi23:/wrk $ sudo parted /dev/sda p freeModel: asmedia ASMT1153e (scsi)Disk /dev/sda: 1000GBSector size (logical/physical): 512B/4096BPartition Table: gptDisk Flags: Number Start End Size File system Name Flags 17.4kB 4194kB 4177kB Free Space 1 4194kB 516MB 512MB fat16 bootfs boot, esp 2 516MB 64.0GB 63.5GB rootfs lvm 64.0GB 1000GB 936GB Free Space foo@pi23:/wrk $ df -hPFilesystem Size Used Avail Use% Mounted onudev 3.8G 0 3.8G 0% /devtmpfs 806M 5.6M 800M 1% /run/dev/mapper/pi23-rootfs 58G 5.5G 50G 10% /tmpfs 4.0G 32K 4.0G 1% /dev/shmtmpfs 5.0M 48K 5.0M 1% /run/lock/dev/sda1 488M 81M 407M 17% /boot/firmwaretmpfs 806M 128K 806M 1% /run/user/1000foo@pi23:/wrk $ cat /boot/firmware/cmdline.txt console=serial0,115200 console=tty1 root=/dev/mapper/pi23-rootfs rootfstype=ext4 fsck.repair=yes rootwaitfoo@pi23:/wrk $ cat /etc/fstab | egrep -v "^(#|$)"proc /proc proc defaults 0 0PARTLABEL=bootfs /boot/firmware vfat defaults 0 2/dev/mapper/pi23-rootfs / ext4 defaults,noatime 0 1foo@pi23:/wrk $ ls -l /dev/mappertotal 0crw------- 1 root root 10, 236 Feb 28 15:30 controllrwxrwxrwx 1 root root 7 Feb 28 15:30 pi23-rootfs -> ../dm-0foo@pi23:/wrk $ sudo pvs PV VG Fmt Attr PSize PFree /dev/sda2 pi23 lvm2 a-- 59.12g 0 foo@pi23:/wrk $ sudo vgs VG #PV #LV #SN Attr VSize VFree pi23 1 1 0 wz--n- 59.12g 0 foo@pi23:/wrk $ sudo lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert rootfs pi23 -wi-ao---- 59.12g Code:
foo@pi23:/wrk $ lsmod | grep dm_moddm_mod 180224 3(*) Was going to list advantages. Seems I'm away for a couple of days.
(**) I have to code for others rather than myself but much quicker than (*).
Statistics: Posted by swampdog — Wed Feb 28, 2024 5:49 pm