124 lines
3.6 KiB
Nix
Executable file
124 lines
3.6 KiB
Nix
Executable file
{ inputs
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, lib
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, ...
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}:
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{
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imports = [
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inputs.disko.nixosModules.disko
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];
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# !!! DANGER !!!
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# You have to carefully configure your partitions here.
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boot.initrd.postDeviceCommands = lib.mkAfter ''
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mkdir /btrfs_tmp
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mount /dev/disk/by-label/nixos /btrfs_tmp
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if [[ -e /btrfs_tmp/root ]]; then
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mkdir -p /btrfs_tmp/roots.old
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timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%-d_%H:%M:%S")
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mv /btrfs_tmp/root "/btrfs_tmp/roots.old/$timestamp"
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fi
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delete_subvolume_recursively() {
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IFS=$'\n'
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for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
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delete_subvolume_recursively "/btrfs_tmp/$i"
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done
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btrfs subvolume delete "$1"
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}
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for i in $(find /btrfs_tmp/roots.old/ -maxdepth 1 -mtime +7); do
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delete_subvolume_recursively "$i"
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done
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btrfs subvolume create /btrfs_tmp/root
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umount /btrfs_tmp
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'';
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disko.devices = {
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disk = {
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main = {
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type = "disk";
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device = "/dev/sda";
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content = {
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type = "gpt";
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partitions = {
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boot = {
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name = "boot";
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size = "1M";
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type = "EF02";
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priority = 1;
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};
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esp = {
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name = "ESP";
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end = "512M";
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type = "EF00";
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content = {
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type = "filesystem";
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format = "vfat";
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mountpoint = "/boot";
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mountOptions = [ "umask=0077" ];
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};
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};
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root = {
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size = "100%";
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content = {
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type = "btrfs";
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extraArgs = [ "-L" "nixos" "-f" ]; # Override existing partition
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# Subvolumes must set a mountpoint in order to be mounted,
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# unless their parent is mounted
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subvolumes = {
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"/root" = {
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mountpoint = "/";
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mountOptions = [ "subvol=root" "compress=zstd" "noatime" ];
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};
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"/home" = {
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mountpoint = "/home";
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mountOptions = [ "subvol=home" "compress=zstd" "noatime" ];
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};
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"/nix" = {
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mountpoint = "/nix";
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mountOptions = [ "subvol=nix" "compress=zstd" "noatime" ];
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};
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"/persist" = {
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mountpoint = "/persist";
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mountOptions = [ "subvol=persist" "compress=zstd" "noatime" ];
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};
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"/var-lib" = {
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mountpoint = "/var/lib";
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mountOptions = [ "subvol=var-lib" "compress=zstd" "noatime" ];
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};
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"/var-log" = {
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mountpoint = "/var/log";
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mountOptions = [ "subvol=var-log" "compress=zstd" "noatime" ];
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};
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"/var-tmp" = {
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mountpoint = "/var/tmp";
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mountOptions = [ "subvol=var-tmp" "compress=zstd" "noatime" ];
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};
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"/swap" = {
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mountpoint = "/.swap";
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swap.swapfile.size = "4G";
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};
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};
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};
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};
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};
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};
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};
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};
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};
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fileSystems = {
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# /, /nix/, /nix/store, /var, /var/log, /var/lib, /var/lib/nixos, /etc, /usr
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# are all automatically mounted marked as needed for boot.
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"/boot".neededForBoot = true;
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"/persist".neededForBoot = true;
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# Possibly not required
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"/home".neededForBoot = true;
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};
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}
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