76 lines
2 KiB
Nix
76 lines
2 KiB
Nix
{
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config,
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lib,
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pkgs,
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modulesPath,
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...
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}: {
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imports = [
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(modulesPath + "/profiles/qemu-guest.nix")
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];
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services.qemuGuest.enable = true;
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boot.initrd.availableKernelModules = ["ata_piix" "uhci_hcd" "virtio_pci" "sr_mod" "virtio_blk"];
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boot.initrd.kernelModules = [];
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boot.kernelModules = [];
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boot.extraModulePackages = [];
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boot.supportedFilesystems = ["btrfs"];
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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/NIXROOT /btrfs_tmp
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if [[ -e /btrfs_tmp/root ]]; then
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mkdir -p /btrfs_tmp/old_roots
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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/old_roots/$timestamp"
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fi
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delete_subvolume_recursively() {
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IFS=$'\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 $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +30); do
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delete_subvolume_recursively "$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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fileSystems."/" = {
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device = "/dev/disk/by-label/NIXROOT";
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fsType = "btrfs";
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options = ["subvol=root" "defaults" "noatime" "compress=zstd:1" "discard=async" "nodatacow"];
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};
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fileSystems."/nix" = {
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device = "/dev/disk/by-label/NIXROOT";
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fsType = "btrfs";
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neededForBoot = true;
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options = ["subvol=nix" "defaults" "noatime" "compress=zstd:3" "discard=async" "nodatacow"];
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};
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fileSystems."/persist" = {
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device = "/dev/disk/by-label/NIXROOT";
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fsType = "btrfs";
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neededForBoot = true;
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options = ["subvol=persist" "defaults" "noatime" "compress=zstd:1" "discard=async" "nodatacow"];
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};
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fileSystems."/boot" = {
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device = "/dev/disk/by-label/NIXBOOT";
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fsType = "vfat";
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options = ["fmask=0077" "dmask=0077"];
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};
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swapDevices = [];
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networking.useDHCP = lib.mkDefault true;
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nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
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}
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