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add btrfs root

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andromeda
2025-12-30 02:04:26 +01:00
parent cba7b6b833
commit f53da44456
1 changed files with 30 additions and 3 deletions
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33
machines/laptop/hardware-configuration.nix
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@@ -18,11 +18,38 @@
boot.extraModulePackages = [];
fileSystems."/" = {
device = "none";
fsType = "tmpfs";
options = ["defaults" "size=60%" "mode=755"];
#device = "none";
#fsType = "tmpfs";
#options = ["defaults" "size=60%" "mode=755"];
device = "/dev/disk/by-uuid/16c93673-4f0e-4010-a7f4-7ccffb20edb7";
fsType = "btrfs";
};
boot.initrd.postResumeCommands = lib.mkAfter ''
mkdir /btrfs_tmp
mount ${config.fileSystems."/".device} /btrfs_tmp
if [[ -e /btrfs_tmp/root ]]; then
mkdir -p /btrfs_tmp/old_roots
timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%-d_%H:$M:%S")
mv /btrfs_tmp/root "/btrfs_tmp/old_roots/$timestamp"
fi
delete_subvolume_recursively() {
IFS=$'\n'
for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
delete_subvolume_recursively "/btrfs_tmp/$i"
done
btrfs subvolume delete "$1"
}
for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +30); do
delete_subvolume_recursively "$i"
done
btrfs subvolume create /btrfs_tmp/root
umount /btrfs_tmp
'';
fileSystems."/nix" = {
device = "/dev/disk/by-uuid/0e586651-36f4-42b0-99b3-3f0704a894d6";
fsType = "btrfs";