95 lines
2.9 KiB
Nix
95 lines
2.9 KiB
Nix
{ lib, config, ... }:
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let
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cfg = config.custom_disko;
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in
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{
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options.custom_disko = {
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withSwap = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = "Whether to create a swap file.";
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};
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};
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config = {
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disko.devices = {
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disk = {
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main = {
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device = "/dev/vda";
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type = "disk";
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content = {
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type = "gpt";
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partitions = {
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ESP = {
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priority = 1;
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name = "ESP";
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start = "1M";
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size = "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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formatOptions = [
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"-n"
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"NIXBOOT"
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];
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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 = [
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"-f"
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"--label NIXROOT"
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];
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subvolumes =
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let
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mountOptions = [
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"compress=zstd"
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"noatime"
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];
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in
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{
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"@root" = {
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inherit mountOptions;
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mountpoint = "/";
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};
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"@nix" = {
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inherit mountOptions;
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mountpoint = "/nix";
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};
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"@persist" = {
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inherit mountOptions;
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mountpoint = "/persist";
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};
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"@snapshots" = {
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inherit mountOptions;
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mountpoint = "/.snapshots";
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};
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"@swap" = lib.mkIf cfg.withSwap {
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inherit mountOptions;
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mountpoint = "/.swapfile";
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swap.swapfile.size = 8 * 1024; # 8GB
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};
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};
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};
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};
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};
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postCreateHook = ''
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MNTPOINT=$(mktemp -d)
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mount -t btrfs "${config.disko.devices.disk.main.content.partitions.root.device}" "$MNTPOINT"
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trap 'umount $MNTPOINT; rmdir $MNTPOINT' EXIT
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# Ensure the snapshots directory exists
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mkdir -p $MNTPOINT/@snapshots
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# Place readonly empty root snapshot inside snapshots subvol
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btrfs subvolume snapshot -r $MNTPOINT/@root $MNTPOINT/@snapshots/_root-empty
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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."/persist".neededForBoot = true;
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};
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}
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