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thinkpad-2025-01-06-10-40-25

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This commit is contained in:
Alexander Szczepanski
2025-01-06 10:40:25 +01:00
parent 8b4ff06e92
commit 13714539c9
10 changed files with 259 additions and 83 deletions
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68
configs/common-linux.nix
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@ -31,44 +31,44 @@
supportedFilesystems = ["ntfs" "btrfs"];
initrd = {
# postDeviceCommands = pkgs.lib.mkBefore ''
# mkdir -p /mnt
postDeviceCommands = pkgs.lib.mkBefore ''
mkdir -p /mnt
# # We first mount the btrfs root to /mnt
# # so we can manipulate btrfs subvolumes.
# mount -o subvol=/ /dev/mapper/lvm-root /mnt
# We first mount the btrfs root to /mnt
# so we can manipulate btrfs subvolumes.
mount -o subvol=/ /dev/mapper/lvm-root /mnt
# # While we're tempted to just delete /root and create
# # a new snapshot from /root-blank, /root is already
# # populated at this point with a number of subvolumes,
# # which makes `btrfs subvolume delete` fail.
# # So, we remove them first.
# #
# # /root contains subvolumes:
# # - /root/var/lib/portables
# # - /root/var/lib/machines
# #
# # I suspect these are related to systemd-nspawn, but
# # since I don't use it I'm not 100% sure.
# # Anyhow, deleting these subvolumes hasn't resulted
# # in any issues so far, except for fairly
# # benign-looking errors from systemd-tmpfiles.
# btrfs subvolume list -o /mnt/root |
# cut -f9 -d' ' |
# while read subvolume; do
# echo "deleting /$subvolume subvolume..."
# btrfs subvolume delete "/mnt/$subvolume"
# done &&
# echo "deleting /root subvolume..." &&
# btrfs subvolume delete /mnt/root
# While we're tempted to just delete /root and create
# a new snapshot from /root-blank, /root is already
# populated at this point with a number of subvolumes,
# which makes `btrfs subvolume delete` fail.
# So, we remove them first.
#
# /root contains subvolumes:
# - /root/var/lib/portables
# - /root/var/lib/machines
#
# I suspect these are related to systemd-nspawn, but
# since I don't use it I'm not 100% sure.
# Anyhow, deleting these subvolumes hasn't resulted
# in any issues so far, except for fairly
# benign-looking errors from systemd-tmpfiles.
btrfs subvolume list -o /mnt/root |
cut -f9 -d' ' |
while read subvolume; do
echo "deleting /$subvolume subvolume..."
btrfs subvolume delete "/mnt/$subvolume"
done &&
echo "deleting /root subvolume..." &&
btrfs subvolume delete /mnt/root
# echo "restoring blank /root subvolume..."
# btrfs subvolume snapshot /mnt/root-blank /mnt/root
echo "restoring blank /root subvolume..."
btrfs subvolume snapshot /mnt/root-blank /mnt/root
# # Once we're done rolling back to a blank snapshot,
# # we can unmount /mnt and continue on the boot process.
# umount /mnt
# '';
# Once we're done rolling back to a blank snapshot,
# we can unmount /mnt and continue on the boot process.
umount /mnt
'';
};
};