components/network/sshd/default.nix

@@ -8,6 +8,7 @@
 with lib;
 with types;
 let
+  defaultRootKeyFiles = [ "${assets}/mrvandalo_rsa.pub" ];
   cfg = config.components.network.sshd;
 
   # maybe ascii-image-converter is also nice here
@@ -29,6 +30,11 @@ in
       type = bool;
       default = true;
     };
+    rootKeyFiles = mkOption {
+      type = with types; listOf path;
+      default = [ ];
+      description = "keys to root login";
+    };
     onlyTincAccess = mkOption {
       type = bool;
       default = false;
@@ -58,13 +64,14 @@ in
         # settings.LoginGraceTime = 0;
       };
 
+      users.users.root.openssh.authorizedKeys.keyFiles = cfg.rootKeyFiles ++ defaultRootKeyFiles;
+
       # todo enable again when I can it's possible to set the `-q` ssh option in clan
       #services.openssh.banner = builtins.readFile sshBanner;
 
     })
 
     (mkIf (cfg.onlyTincAccess && cfg.enable) {
-      # fixme: this is not working
       networking.firewall.extraCommands = ''
         iptables --table nat --append PREROUTING ! --in-interface tinc.+ --protocol tcp --match tcp --dport 22 --jump REDIRECT --to-ports 0
       '';

flake.nix

@@ -224,26 +224,27 @@
           ];
         };
 
-      defaultAuthorizedKeys =
-        { config, pkgs, ... }:
-        {
-          users.users.root.openssh.authorizedKeys.keyFiles = [
-            # yubikey key
-            ./assets/mrvandalo_rsa.pub
-            # backup key
-            "${config.clan.core.clanDir}/machines/chungus/facts/ssh.syncoid.id_ed25519.pub"
-            "${config.clan.core.clanDir}/machines/chungus/facts/ssh.rbackup.id_ed25519.pub"
-            "${config.clan.core.clanDir}/machines/chungus/facts/ssh.paperless-ngx.id_ed25519.pub"
-          ];
-          environment.systemPackages = [ pkgs.borgbackup ];
-        };
-
       defaultModules = [
         # make flake inputs accessiable in NixOS
         {
           _module.args.self = self;
           _module.args.inputs = self.inputs;
         }
+        # ssh keys
+        (
+          { config, pkgs, ... }:
+          {
+            users.users.root.openssh.authorizedKeys.keyFiles = [
+              # master key
+              ./assets/mrvandalo_rsa.pub
+              # backup key
+              "${config.clan.core.clanDir}/machines/chungus/facts/ssh.syncoid.id_ed25519.pub"
+              "${config.clan.core.clanDir}/machines/chungus/facts/ssh.rbackup.id_ed25519.pub"
+              "${config.clan.core.clanDir}/machines/chungus/facts/ssh.paperless-ngx.id_ed25519.pub"
+            ];
+            environment.systemPackages = [ pkgs.borgbackup ];
+          }
+        )
         {
           # disable emergency mode everywhere, although it might be needed on laptops
           boot.initrd.systemd.emergencyAccess = false;
@@ -408,7 +409,6 @@
               name = "cream";
               host = "cream.bear";
               modules = [
-                defaultAuthorizedKeys
                 zerotierModules
                 nixos-hardware.nixosModules.framework-12th-gen-intel
                 retiolum.nixosModules.retiolum
@@ -445,12 +445,6 @@
                 {
                   clan.core.machineDescription = "Laptop";
                 }
-                {
-                  users.users.root.openssh.authorizedKeys.keyFiles = [
-                    # yubikey key
-                    ./assets/mrvandalo_rsa.pub
-                  ];
-                }
               ];
             };
 
@@ -472,15 +466,6 @@
                 {
                   clan.core.machineDescription = "Home Server";
                 }
-                (
-                  { config, ... }:
-                  {
-                    # keys only to access chungus
-                    users.users.root.openssh.authorizedKeys.keyFiles = [
-                      "${config.clan.core.clanDir}/machines/cherry/facts/ssh.root.chungus.id_ed25519.pub"
-                    ];
-                  }
-                )
               ];
             };
 
@@ -489,7 +474,6 @@
               host = "orbi.bear";
               #host = "95.216.66.212";
               modules = [
-                defaultAuthorizedKeys
                 healthchecks.nixosModules.default
                 homeManagerModules
                 stylixModules
@@ -512,7 +496,6 @@
               #host = "167.235.205.150";
               host = "95.217.18.54";
               modules = [
-                defaultAuthorizedKeys
                 homeManagerModules
                 stylixModules
                 srvos.nixosModules.hardware-hetzner-cloud
@@ -534,7 +517,6 @@
               #host = "usbstick.bear";
               host = "10.100.0.100";
               modules = [
-                defaultAuthorizedKeys
                 homeManagerModules
                 stylixModules
                 zerotierModules

machines/cherry/configuration.nix

@@ -20,8 +20,6 @@
     ./37c3.nix
     ./topology.nix
 
-    ./ssh.nix
-
   ];
 
   #time.timeZone = lib.mkForce "Asia/Bangkok";

machines/cherry/facts/ssh.root.chungus.id_ed25519.pub

@@ -1 +0,0 @@
-ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDhrmPLOY18azllQEsK+je42aaqnpHm0k3f0bjQEnQXW palo@cherry

machines/cherry/ssh.nix

@@ -1,39 +0,0 @@
-{ config, factsGenerator, ... }:
-{
-
-  # Defines the root SSH key to be used exclusively for accessing the backup server.
-  # The need for this arises because deployments using the 'clan' command-line tool (e.g. 'clan machines update')
-  # make use of the 'ssh -A' option, which forwards the SSH agent from the client to the target machine.
-  # If the target machine becomes compromised by an attacker,
-  # they could potentially leverage the forwarded SSH agent to access the backup server.
-  # This file prevents that scenario by restricting access strictly to the defined SSH key,
-  # which is only used to access the backup server, so no other ssh-agent will contain this ssh key
-
-  clan.core.facts.services."mainUser.ssh.chungus" = factsGenerator.ssh { name = "root.chungus"; };
-
-  systemd.tmpfiles.settings.mainUser = {
-    "/run/facts/ssh.mainUser.chungus.id_ed25519"."C+" = {
-      user = config.users.users.mainUser.name;
-      group = config.users.users.mainUser.group;
-      mode = "400";
-      argument =
-        config.clan.core.facts.services."mainUser.ssh.chungus".secret."ssh.root.chungus.id_ed25519".path;
-    };
-  };
-
-  home-manager.users.mainUser.programs.ssh.matchBlocks = {
-    "chungus.bear" = {
-      identityFile = "/run/facts/ssh.mainUser.chungus.id_ed25519";
-      identitiesOnly = true;
-    };
-    "chungus.private" = {
-      identityFile = "/run/facts/ssh.mainUser.chungus.id_ed25519";
-      identitiesOnly = true;
-    };
-    "chungus.wg0" = {
-      identityFile = "/run/facts/ssh.mainUser.chungus.id_ed25519";
-      identitiesOnly = true;
-    };
-  };
-
-}

machines/chungus/facts/ssh.paperless-ngx.id_ed25519.pub

@@ -1 +1 @@
-ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIH5cHogtLN70T5g7b30r2RR4l6TEFB4t8O8FZ+NMUTfj paperless@chungus
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIH5cHogtLN70T5g7b30r2RR4l6TEFB4t8O8FZ+NMUTfj nixbld@cherry

machines/chungus/facts/ssh.rbackup.id_ed25519.pub

@@ -1 +1 @@
-ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJrcZBnx2h1cOlpHImuYhOu08gUdchzbKwbmOMUd54f3 rbackup@chungus
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJrcZBnx2h1cOlpHImuYhOu08gUdchzbKwbmOMUd54f3 nixbld@cream

machines/chungus/facts/ssh.syncoid.id_ed25519.pub

@@ -1 +1 @@
-ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJHGxMlaCoAyD/lIYAxEts7vyWYJ7ut4P9Cjw7mvAPiL syncoid@chungus
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJHGxMlaCoAyD/lIYAxEts7vyWYJ7ut4P9Cjw7mvAPiL nixbld@cream

machines/chungus/facts/syncoid.ssh.id_ed25519.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICrdJ4EXJ0HeZXTb4AzRKQeAORBWwcawOxj4EJhV62De nixbld@cherry

machines/usbstick/configuration.nix

@@ -28,8 +28,24 @@
   # Set your time zone.
   #time.timeZone = "Europe/Berlin";
 
+  #environment.systemPackages = with pkgs; [
+  #  vim
+  #  wget
+  #  htop
+  #  silver-searcher
+  #];
+
+  #environment.extraInit = ''
+  #  # use vi shortcuts
+  #  # ----------------
+  #  set -o vi
+  #  EDITOR=vim
+  #'';
+
   services.openssh.enable = true;
 
+  #users.users.root.openssh.authorizedKeys.keys = [ "ssh-rsa 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 contact@ingolf-wagner.de" ];
+
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
   # on your system were taken. It‘s perfectly fine and recommended to leave

scripts/hetzner-dedicated-wipe-and-install-nixos.sh

@@ -0,0 +1,380 @@
+#!/usr/bin/env bash
+
+# Adepted from :
+# * https://mazzo.li/posts/hetzner-zfs.html
+# * https://nixos.wiki/wiki/Install_NixOS_on_Hetzner_Online
+
+# Installs NixOS on a Hetzner server, wiping the server.
+#
+# This is for a specific server configuration; adjust where needed.
+#
+# Prerequisites:
+#   * Update the script wherever FIXME is present
+#
+# Usage:
+#     ssh root@YOUR_SERVERS_IP bash -s < hetzner-dedicated-wipe-and-install-nixos.sh
+#
+# When the script is done, make sure to boot the server from HD, not rescue mode again.
+
+# Explanations:
+#
+# * Adapted from https://gist.github.com/nh2/78d1c65e33806e7728622dbe748c2b6a
+# * Following largely https://nixos.org/nixos/manual/index.html#sec-installing-from-other-distro.
+# * **Important:** We boot in legacy-BIOS mode, not UEFI, because that's what Hetzner uses.
+#   * NVMe devices aren't supported for booting (those require EFI boot)
+# * We set a custom `configuration.nix` so that we can connect to the machine afterwards,
+#   inspired by https://nixos.wiki/wiki/Install_NixOS_on_Hetzner_Online
+# * This server has 2 HDDs.
+#   We encrypt all hard drives and put an LVM on it the main logical volume is mirrored
+#   Storage scheme: `partitions -> dm-crypt -> LVM -> ext4`.
+#
+#   ┌────────┐                      ┌────────┐
+#   │  sda1  │   ◄──── grub  ─────► │  sdb1  │
+#   ├────────┤                      ├────────┤
+#   │  sda2  │   ◄──── /boot ─────► │  sdb2  │
+#   ├────────┤                      ├────────┤
+#   │  sda3  ├───┐              ┌───┤  sdb3  │
+#   └────────┘   │              │   └────────┘
+#                │              │
+#   ┌────────────▼┐            ┌▼────────────┐
+#   │ a_encrypted │            │ b_encrypted │
+#   └────────┬────┘            └────┬────────┘
+#            │     ┌──────────┐     │
+#            └─────►  LVM vg  ◄─────┘
+#                  └────┬─────┘
+#                       │
+#         ┌─────────────▼──────────────┐
+#         │ root (mirrored/raid1)      │
+#         ├────────────────────────────┤
+#         │ nextcloud (mirrored/raid1) │
+#         ├────────────────────────────┤
+#         │ media (raid0)              │
+#         └────────────────────────────┘
+# * A root user with empty password is created, so that you can just login
+#   as root and press enter when using the Hetzner spider KVM.
+#   Of course that empty-password login isn't exposed to the Internet.
+#   Change the password afterwards to avoid anyone with physical access
+#   being able to login without any authentication.
+# * The script reboots at the end.
+# * does not use uefi (check if you can : efibootmgr)
+#
+
+# FIXME : change password
+MAIN_PASSWORD="YOLO"
+
+set -eu
+set -o pipefail
+
+set -x
+
+# Inspect existing disks
+lsblk
+
+# Cleanup
+# -------
+
+# Undo existing setups to allow running the script multiple times to iterate on it.
+# We allow these operations to fail for the case the script runs the first time.
+set +e
+umount /mnt/boot-{1,2}
+umount /mnt
+vgchange -an
+cryptsetup close a_encrypted
+cryptsetup close b_encrypted
+set -e
+
+# Stop all mdadm arrays that the boot may have activated.
+mdadm --stop --scan
+
+# Create partition tables (--script to not ask)
+# ---------------------------------------------
+
+format() {
+  parted --script "$1" -- mklabel gpt
+
+  parted --script "$1" -- mkpart 'BIOS-boot-partition' 1MB 2MB set 1 bios_grub on
+  #parted --script "$1" -- mkpart 'boot' 2MB 512MiB
+  #parted --script "$1" -- mkpart ESP fat32 2MB 512MiB
+  parted --script "$1" -- mkpart 'boot' fat32 2MB 512MiB set 2 boot on
+
+
+  parted --script "$1" -- mkpart primary 512MiB 100%
+  parted --script "$1" -- print
+}
+
+# In this particular machine we have two NVMe disks
+format /dev/sda
+format /dev/sdb
+
+
+# Relaod partitions
+partprobe
+
+# Wait for all devices to exist
+udevadm settle --timeout=5 --exit-if-exists=/dev/sda1
+udevadm settle --timeout=5 --exit-if-exists=/dev/sda2
+udevadm settle --timeout=5 --exit-if-exists=/dev/sda3
+udevadm settle --timeout=5 --exit-if-exists=/dev/sdb1
+udevadm settle --timeout=5 --exit-if-exists=/dev/sdb2
+udevadm settle --timeout=5 --exit-if-exists=/dev/sdb3
+
+
+# Disable RAID recovery. We don't want this to slow down machine provisioning
+# in the rescue mode. It can run in normal operation after reboot.
+echo 0 > /proc/sys/dev/raid/speed_limit_max
+
+# LVM
+
+encrypt() {
+  device=$1
+  label=$2
+  echo -n "$MAIN_PASSWORD" | cryptsetup luksFormat ${device}3 -
+  echo -n "$MAIN_PASSWORD" | cryptsetup --key-file - open --type luks ${device}3 ${label}_encrypted
+}
+
+encrypt /dev/sda "a"
+encrypt /dev/sdb "b"
+
+
+
+# /boot partitions
+# ----------------
+
+
+mkfs.fat -F 32 -n boot /dev/sda2
+mkfs.fat -F 32 -n boot /dev/sdb2
+
+
+
+# PVs
+
+pvcreate /dev/mapper/a_encrypted
+pvcreate /dev/mapper/b_encrypted
+
+# VGs
+vgcreate vg /dev/mapper/a_encrypted /dev/mapper/b_encrypted
+
+# LVs (--yes to automatically wipe detected file system signatures)
+
+# the root partition should be raid1
+lvcreate --mirrors 1 --type raid1 -L 150G -n root vg
+
+# Filesystems (-F to not ask on preexisting FS)
+mkfs.ext4 -F -L root /dev/mapper/vg-root
+
+# Creating file systems changes their UUIDs.
+# Trigger udev so that the entries in /dev/disk/by-uuid get refreshed.
+# `nixos-generate-config` depends on those being up-to-date.
+# See https://github.com/NixOS/nixpkgs/issues/62444
+udevadm trigger
+
+# Wait for FS labels to appear
+udevadm settle --timeout=5 --exit-if-exists=/dev/disk/by-label/root
+
+# NixOS pre-installation mounts
+# -----------------------------
+
+# Mount target root partition
+mount /dev/disk/by-label/root /mnt
+mkdir -p /mnt/boot-{1,2}
+modprobe vfat
+mount /dev/sda2 /mnt/boot-1
+mount /dev/sdb2 /mnt/boot-2
+
+# Installing nix
+# --------------
+
+# Installing nix requires `sudo`; the Hetzner rescue mode doesn't have it.
+apt-get install -y sudo
+
+# Allow installing nix as root, see
+#   https://github.com/NixOS/nix/issues/936#issuecomment-475795730
+mkdir -p /etc/nix
+echo "build-users-group =" > /etc/nix/nix.conf
+
+curl -L https://nixos.org/nix/install | sh
+set +u +x # sourcing this may refer to unset variables that we have no control over
+. $HOME/.nix-profile/etc/profile.d/nix.sh
+set -u -x
+
+# FIXME Keep in sync with `system.stateVersion` set below!
+nix-channel --add https://nixos.org/channels/nixos-21.05 nixpkgs
+nix-channel --update
+
+# Getting NixOS installation tools
+nix-env -iE "_: with import <nixpkgs/nixos> { configuration = {}; }; with config.system.build; [ nixos-generate-config nixos-install nixos-enter manual.manpages ]"
+
+nixos-generate-config --root /mnt
+
+# Detect
+# ------
+
+# Find the name of the network interface that connects us to the Internet.
+# Inspired by https://unix.stackexchange.com/questions/14961/how-to-find-out-which-interface-am-i-using-for-connecting-to-the-internet/302613#302613
+RESCUE_INTERFACE=$(ip route get 8.8.8.8 | grep -Po '(?<=dev )(\S+)')
+
+# Find what its name will be under NixOS, which uses stable interface names.
+# See https://major.io/2015/08/21/understanding-systemds-predictable-network-device-names/#comment-545626
+# NICs for most Hetzner servers are not onboard, which is why we use
+# `ID_NET_NAME_PATH`otherwise it would be `ID_NET_NAME_ONBOARD`.
+INTERFACE_DEVICE_PATH=$(udevadm info -e | grep -Po "(?<=^P: )(.*${RESCUE_INTERFACE})")
+UDEVADM_PROPERTIES_FOR_INTERFACE=$(udevadm info --query=property "--path=$INTERFACE_DEVICE_PATH")
+NIXOS_INTERFACE=$(echo "$UDEVADM_PROPERTIES_FOR_INTERFACE" | grep -o -E 'ID_NET_NAME_PATH=\w+' | cut -d= -f2)
+echo "Determined NIXOS_INTERFACE as '$NIXOS_INTERFACE'"
+#NIXOS_INTERFACE='eth0'
+
+IP_V4=$(ip route get 8.8.8.8 | grep -Po '(?<=src )(\S+)')
+echo "Determined IP_V4 as $IP_V4"
+
+# Determine Internet IPv6 by checking route, and using ::1
+# (because Hetzner rescue mode uses ::2 by default).
+# The `ip -6 route get` output on Hetzner looks like:
+#   # ip -6 route get 2001:4860:4860:0:0:0:0:8888
+#   2001:4860:4860::8888 via fe80::1 dev eth0 src 2a01:4f8:151:62aa::2 metric 1024  pref medium
+IP_V6="$(ip route get 2001:4860:4860:0:0:0:0:8888 | head -1 | cut -d' ' -f7 | cut -d: -f1-4)::1"
+echo "Determined IP_V6 as $IP_V6"
+
+
+# From https://stackoverflow.com/questions/1204629/how-do-i-get-the-default-gateway-in-linux-given-the-destination/15973156#15973156
+read _ _ DEFAULT_GATEWAY _ < <(ip route list match 0/0); echo "$DEFAULT_GATEWAY"
+echo "Determined DEFAULT_GATEWAY as $DEFAULT_GATEWAY"
+
+
+# Generate `configuration.nix`. Note that we splice in shell variables.
+cat > /mnt/etc/nixos/configuration.nix <<EOF
+{ config, pkgs, modulesPath, lib, ... }:
+let
+  hostName = "hetzner";
+  # FIXME configure network driver
+  # in rescue
+  # apt install -y lshw
+  # lshw -C network | grep -Poh 'driver=[[:alnum:]]+'
+  networkInterfaceModule = "r8169";
+  networkInterface = "$NIXOS_INTERFACE";
+  # From the Hetzner control panel
+  ipv4 = {
+    address = "$IP_V4";           # the ip address
+    gateway = "$DEFAULT_GATEWAY"; # the gateway ip address
+    netmask = "255.255.255.224";  # the netmask -- might not be the same for you!
+    prefixLength = 27;            # must match the netmask, see <https://www.pawprint.net/designresources/netmask-converter.php>
+  };
+  ipv6 = {
+    address = "$IP_V6";  # the ipv6 addres
+    gateway = "fe80::1"; # the ipv6 gateway
+    prefixLength = 64;   # shown in the control panel
+  };
+in
+{
+  imports =
+    [ # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+
+  # needed lvm for raid
+  boot.initrd.kernelModules = [
+    "dm-snapshot"
+    "dm_mirror"
+    "dm_raid"
+    "dm_region_hash"
+  ];
+
+  # Use GRUB2 as the boot loader.
+  # We don't use systemd-boot because Hetzner uses BIOS legacy boot.
+  boot.loader.systemd-boot.enable = false;
+  boot.loader.grub = {
+    enable = true;
+    efiSupport = false;
+    version = 2;
+  };
+
+  # This will mirror all UEFI files, kernels, grub menus and
+  # things needed to boot to the other drive.
+  boot.loader.grub.mirroredBoots = [
+    { path = "/boot-1"; devices = [ "/dev/sda" ]; }
+    { path = "/boot-2"; devices = [ "/dev/sdb" ]; }
+  ];
+
+  # We want to still be able to boot without one of these
+  fileSystems."/boot-1".options = [ "nofail" ];
+  fileSystems."/boot-2".options = [ "nofail" ];
+
+  boot.initrd.luks.reusePassphrases = true;
+  boot.initrd.luks.devices = {
+    a_encrypted = {
+      device = "/dev/sda3";
+      preLVM = true;
+    };
+    b_encrypted = {
+      device = "/dev/sdb3";
+      preLVM = true;
+    };
+  };
+
+  networking.hostName = hostName;
+
+  # Network configuration (Hetzner uses static IP assignments, and we don't use DHCP here)
+  networking.useDHCP = false;
+  networking.interfaces.\${networkInterface} = {
+    ipv4 = { addresses = [{ address = ipv4.address; prefixLength = ipv4.prefixLength; }]; };
+    ipv6 = { addresses = [{ address = ipv6.address; prefixLength = ipv6.prefixLength; }]; };
+  };
+  networking.defaultGateway = ipv4.gateway;
+  networking.defaultGateway6 = { address = ipv6.gateway; interface = networkInterface; };
+  networking.nameservers = [ "8.8.8.8" ];
+
+  # Initial empty root password for easy login:
+  users.users.root.initialHashedPassword = "";
+  services.openssh.permitRootLogin = "prohibit-password";
+
+  users.users.root.openssh.authorizedKeys.keys = [
+    # FIXME : add ssh key
+    "ssh-rsa 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"
+  ];
+
+  services.openssh.enable = true;
+
+  system.stateVersion = "21.05";
+
+  # enable ssh on init
+  # ------------------
+
+  boot.kernelParams = [
+    # See <https://www.kernel.org/doc/Documentation/filesystems/nfs/nfsroot.txt> for docs on this
+    # ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>:<dns0-ip>:<dns1-ip>:<ntp0-ip>
+    # The server ip refers to the NFS server -- we don't need it.
+    "ip=\${ipv4.address}::\${ipv4.gateway}:\${ipv4.netmask}:\${hostName}-initrd:\${networkInterface}:off:8.8.8.8"
+  ];
+  boot.initrd.availableKernelModules = [ networkInterfaceModule ];
+  boot.initrd.network.enable = true;
+  boot.initrd.network.ssh = {
+    enable = true;
+    authorizedKeys = config.users.users.root.openssh.authorizedKeys.keys;
+    port = 22;
+    hostKeys = [
+      /etc/secrets/initrd/ssh_host_rsa_key
+      /etc/secrets/initrd/ssh_host_ed25519_key
+    ];
+  };
+
+}
+EOF
+
+
+mkdir -p /mnt/etc/secrets/initrd/
+
+ssh-keygen -t rsa -N "" -f /mnt/etc/secrets/initrd/ssh_host_rsa_key
+ssh-keygen -t ed25519 -N "" -f /mnt/etc/secrets/initrd/ssh_host_ed25519_key
+
+
+# Install NixOS
+#PATH="$PATH" NIX_PATH="$NIX_PATH" `which nixos-install` --no-root-passwd --root /mnt --max-jobs 40
+PATH="$PATH" $( which nixos-install` --no-root-passwd --root /mnt --max-jobs 40 )
+
+umount /mnt/boot-{1,2}
+umount /mnt
+
+echo "Determined NIXOS_INTERFACE as '$NIXOS_INTERFACE'"
+echo "Determined IP_V4 as $IP_V4"
+echo "Determined IP_V6 as $IP_V6"
+echo "Determined DEFAULT_GATEWAY as $DEFAULT_GATEWAY"
+reboot