servers/losurdo/production/networking.nix

   1 { pkgs, lib, config, nodes, ... }:
   2 with builtins;
   3 let
   4   inherit (builtins.extraBuiltins) pass pass-to-file;
   5   inherit (config) networking users;
   6   lanIPv4        = "192.168.1.215";
   7   lanNet         = "192.168.1.0/24";
   8   lanIPv4Gateway = "192.168.1.1";
   9 in
  10 {
  11 boot.initrd.network = {
  12   enable = true;
  13   ssh = {
  14     enable = true;
  15     # To prevent ssh from freaking out because a different host key is used,
  16     # a different port for dropbear is useful
  17     # (assuming the same host has also a normal sshd running)
  18     port = 2222;
  19     # The initrd needs a cleartext key and is built on the host,
  20     # hence this key needs to be cleartext on the host.
  21     # Moreover building the initrd means that the key will go into the Nix store,
  22     # of the host, then of the target on deployment,
  23     # because GRUB does not support boot.initrd.secrets
  24     # (only systemd-boot does, but sticking to GRUB is more reassuring).
  25     # In any case, the initrd is sent to a non-encrypted /boot partition
  26     # to be able to start unattended, hence the key will be available
  27     # to anyone who has physically access to the disk where /boot is.
  28     hostKeys = [
  29       (pass-to-file "servers/losurdo/ssh/ecdsa.key"
  30                     (../../../sec + "/tmp/losurdo.ecdsa.key"))
  31     ];
  32
  33     authorizedKeys = users.users.root.openssh.authorizedKeys.keys;
  34   };
  35   # This will automatically load the zfs password prompt on login
  36   # and kill the other prompt so boot can continue
  37   # The pkill zfs kills the zfs load-key from the console
  38   # allowing the boot to continue.
  39   postCommands = ''
  40     echo >>/root/.profile "zfs load-key -a && pkill zfs"
  41   '';
  42 };
  43
  44 /* WARNING: using ipconfig (the ip= kernel parameter) IS NOT RELIABLE:
  45    a 91.216.110.35/32 becomes a 91.216.110.35/8
  46 boot.kernelParams = map
  47   (ip: "ip=${ip.clientIP}:${ip.serverIP}:${ip.gatewayIP}:${ip.netmask}:${ip.hostname}:${ip.device}:${ip.autoconf}")
  48   [ { clientIP = netIPv4; serverIP = "";
  49       gatewayIP = networking.defaultGateway.address;
  50       netmask = "255.255.255.255";
  51       hostname = ""; device = networking.defaultGateway.interface;
  52       autoconf = "off";
  53     }
  54     { clientIP = lanIPv4; serverIP = "";
  55       gatewayIP = "";
  56       netmask = "255.255.255.0";
  57       hostname = ""; device = "enp2s0";
  58       autoconf = "off";
  59     }
  60   ];
  61 */
  62 /* DIY network config, but a right one */
  63 boot.initrd.preLVMCommands = ''
  64   set -x
  65
  66   # IPv4 lan
  67   ip link set enp5s0 up
  68   ip address add ${lanIPv4}/32 dev enp5s0
  69   ip route add ${lanIPv4Gateway} dev enp5s0
  70   ip route add ${lanNet} dev enp5s0 src ${lanIPv4} proto kernel
  71     # NOTE: ${lanIPv4}/24 would not work with initrd's ip, hence ${lanNet}
  72   ip route add default via ${lanIPv4Gateway} dev enp5s0
  73
  74   # IPv6 net
  75   #ip -6 address add ''${lanIPv6} dev enp5s0
  76   #ip -6 route add ''${lanIPv6Gateway} dev enp5s0
  77   #ip -6 route add default via ''${lanIPv6Gateway} dev enp5s0
  78
  79   ip -4 address
  80   ip -4 route
  81   #ip -6 address
  82   #ip -6 route
  83
  84   set +x
  85
  86   # Since boot.initrd.network's preLVMCommands won't set hasNetwork=1
  87   # we have to run the postCommands ourselves.
  88   ${config.boot.initrd.network.postCommands}
  89 '';
  90 # Workaround https://github.com/NixOS/nixpkgs/issues/56822
  91 #boot.initrd.kernelModules = [ "ipv6" ];
  92
  93 # Useless without an out-of-band access, and unsecure
  94 # (though / may still be encrypted at this point).
  95 # boot.kernelParams = [ "boot.shell_on_fail" ];
  96
  97 # Disable IPv6 entirely until it's available
  98 boot.kernel.sysctl = {
  99   "net.ipv6.conf.enp5s0.disable_ipv6" = 1;
 100 };
 101
 102 networking = {
 103   useDHCP = false;
 104   defaultGateway = {
 105     address = lanIPv4Gateway;
 106     interface = "enp5s0";
 107   };
 108   /*
 109   defaultGateway6 = {
 110     address = lanIPv6Gateway;
 111     interface = "enp5s0";
 112   };
 113   */
 114   #nameservers = [ ];
 115   interfaces.enp5s0 = {
 116     useDHCP = false;
 117     ipv4.addresses = [ { address = lanIPv4; prefixLength = 24; } ];
 118     ipv4.routes    = [ { address = networking.defaultGateway.address; prefixLength = 32; } ];
 119
 120     /*
 121     ipv6.addresses = [ { address = lanIPv6; prefixLength = 64; }
 122                        { address = "fe80::1"; prefixLength = 10; }
 123                      ];
 124     ipv6.routes    = [ { address = networking.defaultGateway6.address; prefixLength = 64; } ];
 125     */
 126   };
 127   interfaces.wlp4s0 = {
 128     useDHCP = false;
 129   };
 130 };
 131 }