109 lines
3.2 KiB
Nix
109 lines
3.2 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 = [(modulesPath + "/installer/scan/not-detected.nix")];
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boot.initrd.availableKernelModules = ["xhci_pci" "nvme" "sdhci_pci"];
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boot.initrd.kernelModules = [];
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boot.kernelPackages = pkgs.linuxPackages_latest;
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boot.kernelModules = ["kvm-intel"];
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boot.extraModulePackages = [];
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fileSystems."/" = {
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device = "/dev/disk/by-uuid/5455cfb4-0efd-4f55-b496-d2cab3f419b7";
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fsType = "btrfs";
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options = ["subvol=root"];
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};
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boot.initrd.systemd = {
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services.impermanent-btrfs = {
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description = "saves old root and makes new one";
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unitConfig.DefaultDependencies = false;
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serviceConfig = {
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Type = "oneshot";
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StandardOutput = "journal+console";
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StandardError = "journal+console";
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};
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requiredBy = [
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"initrd.target"
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];
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before = [
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"sysroot.mount"
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];
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requires = [
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"initrd-root-device.target"
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];
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after = [
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"initrd-root-device.target"
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"local-fs-pre.target"
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];
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script = ''
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mkdir /btrfs_tmp
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mount ${config.fileSystems."/".device} /btrfs_tmp
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if [[ -e /btrfs_tmp/root ]]; then
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mkdir -p /btrfs_tmp/old_roots
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timestamp=$(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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mkdir /btrfs_tmp/root/persist
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mkdir /btrfs_tmp/root/etc
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mount ${config.fileSystems."/persist".device} /btrfs_tmp/root/persist -o subvol=persist
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cp /btrfs_tmp/root/persist/etc/ssh /btrfs_tmp/root/etc/ssh -r
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umount /btrfs_tmp/root/persist
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rm -r /btrfs_tmp/root/persist
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umount /btrfs_tmp
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'';
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};
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extraBin = {
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"mkdir" = "${pkgs.coreutils}/bin/mkdir";
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"date" = "${pkgs.coreutils}/bin/date";
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"stat" = "${pkgs.coreutils}/bin/stat";
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"mv" = "${pkgs.coreutils}/bin/mv";
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"cp" = "${pkgs.coreutils}/bin/cp";
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"rm" = "${pkgs.coreutils}/bin/rm";
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"btrfs" = "${pkgs.btrfs-progs}/bin/btrfs";
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# find, mount, umount already there
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};
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};
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fileSystems."/nix" = {
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device = "/dev/disk/by-uuid/0e586651-36f4-42b0-99b3-3f0704a894d6";
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fsType = "btrfs";
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};
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fileSystems."/persist" = {
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device = "/dev/disk/by-uuid/5455cfb4-0efd-4f55-b496-d2cab3f419b7";
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fsType = "btrfs";
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options = ["subvol=persist"];
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};
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fileSystems."/boot" = {
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device = "/dev/disk/by-uuid/F425-55BA";
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fsType = "vfat";
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options = ["fmask=0022" "dmask=0022"];
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};
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swapDevices = [];
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nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
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hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
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system.stateVersion = "26.05";
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}
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