forked from jan-leila/nix-config
drafted out impermanence for defiant
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818110419e
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22f6a37ea8
5 changed files with 182 additions and 46 deletions
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@ -1,10 +1,9 @@
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{lib, ...}: let
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{...}: let
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bootDisk = devicePath: {
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type = "disk";
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device = devicePath;
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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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size = "1M";
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@ -32,37 +31,37 @@
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size = "100%";
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content = {
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type = "zfs";
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pool = "zroot";
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};
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};
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};
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};
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};
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cacheDisk = devicePath: swapSize: {
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type = "disk";
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device = devicePath;
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content = {
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type = "gpt";
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partitions = {
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encryptedSwap = {
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size = swapSize;
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content = {
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type = "swap";
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randomEncryption = true;
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discardPolicy = "both";
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resumeDevice = true;
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};
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};
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zfs = {
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size = "100%";
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content = {
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type = "zfs";
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pool = "zroot";
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pool = "rpool";
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};
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};
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};
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};
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};
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# cacheDisk = devicePath: swapSize: {
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# type = "disk";
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# device = devicePath;
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# content = {
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# type = "gpt";
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# partitions = {
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# encryptedSwap = {
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# size = swapSize;
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# content = {
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# type = "swap";
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# randomEncryption = true;
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# discardPolicy = "both";
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# resumeDevice = true;
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# };
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# };
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# zfs = {
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# size = "100%";
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# content = {
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# type = "zfs";
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# pool = "rpool";
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# };
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# };
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# };
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# };
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# };
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in {
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disko.devices = {
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disk = {
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@ -75,7 +74,7 @@ in {
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# ssd_2_tb_a = cacheDisk "64G" "/dev/disk/by-id/XXX";
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};
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zpool = {
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zroot = {
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rpool = {
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type = "zpool";
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mode = {
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topology = {
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@ -92,7 +91,7 @@ in {
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}
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];
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cache = [];
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# cache = [ "ssd_2_tb_a" ];
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# cache = [ "ssd_2_tb_a" ];z
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};
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};
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@ -101,34 +100,40 @@ in {
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};
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rootFsOptions = {
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encryption = "on";
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keyformat = "hex";
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keylocation = "prompt";
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# encryption = "on";
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# keyformat = "hex";
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# keylocation = "prompt";
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compression = "lz4";
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xattr = "sa";
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acltype = "posixacl";
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canmount = "off";
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"com.sun:auto-snapshot" = "false";
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};
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mountpoint = "/";
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postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^zroot@blank$' || zfs snapshot zroot@blank";
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datasets = {
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"nix" = {
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root = {
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type = "zfs_fs";
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mountpoint = "/";
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options.mountpoint = "legacy";
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postCreateHook = "zfs snapshot rpool/root@blank";
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};
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home = {
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type = "zfs_fs";
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options.mountpoint = "legacy";
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mountpoint = "/home";
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postCreateHook = "zfs snapshot rpool/home@blank";
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};
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nix = {
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type = "zfs_fs";
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mountpoint = "/nix";
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};
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"home" = {
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persistent = {
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type = "zfs_fs";
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mountpoint = "/mnt/home";
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mountpoint = "/persistent";
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options = {
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"com.sun:auto-snapshot" = "true";
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};
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};
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"var" = {
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type = "zfs_fs";
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mountpoint = "/var";
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};
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};
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};
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};
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@ -2,9 +2,9 @@
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# and may be overwritten by future invocations. Please make changes
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# to /etc/nixos/configuration.nix instead.
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{
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pkgs,
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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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@ -13,27 +13,136 @@
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../hardware-common.nix
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];
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security.sudo.extraConfig = "Defaults lecture=never";
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boot = {
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initrd = {
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availableKernelModules = ["xhci_pci" "aacraid" "ahci" "usbhid" "usb_storage" "sd_mod"];
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kernelModules = [];
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# TODO: figure out some kind of snapshotting before rolebacks
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# postDeviceCommands = lib.mkAfter ''
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# zfs rollback -r rpool/root@blank
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# zfs rollback -r rpool/home@blank
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# '';
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systemd = {
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enable = lib.mkDefault true;
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services.rollback = {
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description = "Rollback root filesystem to a pristine state on boot";
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wantedBy = [
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"zfs.target"
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"initrd.target"
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];
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after = [
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"zfs-import-rpool.service"
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];
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before = [
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"sysroot.mount"
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"fs.target"
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];
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path = with pkgs; [
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zfs
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];
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unitConfig.DefaultDependencies = "no";
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# serviceConfig = {
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# Type = "oneshot";
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# ExecStart =
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# "${config.boot.zfs.package}/sbin/zfs rollback -r rpool/home@blank";
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# };
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serviceConfig.Type = "oneshot";
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script = ''
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zfs list -t snapshot || echo
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zfs rollback -r rpool/root@blank
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zfs rollback -r rpool/home@blank
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'';
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};
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};
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};
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kernelModules = ["kvm-amd"];
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kernelParams = ["quiet"];
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extraModulePackages = [];
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supportedFilesystems = ["zfs"];
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zfs.extraPools = ["zroot"];
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zfs.extraPools = ["rpool"];
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};
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swapDevices = [];
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fileSystems = {
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"/" = {
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neededForBoot = true;
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};
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"/home" = {
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neededForBoot = true;
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};
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"/persistent" = {
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neededForBoot = true;
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};
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};
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networking = {
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hostId = "c51763d6";
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hostName = "defiant"; # Define your hostname.
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useNetworkd = true;
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};
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environment.persistence."/persistent" = {
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enable = true;
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hideMounts = true;
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directories = [
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# "/run/secrets"
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"/etc/ssh"
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"/var/log"
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"/var/lib/nixos"
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"/var/lib/systemd/coredump"
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# config.apps.pihole.directory.root
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# config.apps.jellyfin.mediaDirectory
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# config.services.jellyfin.configDir
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# config.services.jellyfin.cacheDir
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# config.services.jellyfin.dataDir
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# "/var/hass" # config.users.users.hass.home
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# "/var/postgresql" # config.users.users.postgresql.home
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# "/var/forgejo" # config.users.users.forgejo.home
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# "/var/nextcloud" # config.users.users.nextcloud.home
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# "/var/headscale" # config.users.users.headscale.home
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];
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files = [
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"/etc/machine-id"
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# config.environment.sessionVariables.SOPS_AGE_KEY_FILE
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];
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users.leyla = {
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directories = [
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"documents"
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".ssh"
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];
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files = [];
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};
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};
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# systemd.services = {
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# # https://github.com/openzfs/zfs/issues/10891
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# systemd-udev-settle.enable = false;
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# # Snapshots are not accessable on boot for some reason this should fix it
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# # https://github.com/NixOS/nixpkgs/issues/257505
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# zfs-mount = {
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# serviceConfig = {
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# # ExecStart = [ "${lib.getExe' pkgs.util-linux "mount"} -a -t zfs -o remount" ];
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# ExecStart = [
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# "${lib.getExe' pkgs.util-linux "mount"} -t zfs rpool/root -o remount"
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# "${lib.getExe' pkgs.util-linux "mount"} -t zfs rpool/home -o remount"
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# "${lib.getExe' pkgs.util-linux "mount"} -t zfs rpool/persistent -o remount"
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# ];
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# };
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# };
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# };
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systemd.network = {
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enable = true;
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