modules/private/system/eldiron.nix

   1 { privateFiles }:
   2 { config, pkgs, lib, ... }:
   3 {
   4   boot.supportedFilesystems = [ "zfs" ];
   5   boot.kernelParams = ["zfs.zfs_arc_max=6442450944"];
   6   boot.kernelPackages = pkgs.linuxPackages_latest;
   7   myEnv = import "${privateFiles}/environment.nix" // { inherit privateFiles; };
   8
   9   fileSystems = {
  10     "/"     = lib.mkForce { fsType = "zfs"; device = "zpool/root"; };
  11     "/boot" = { fsType = "ext4"; device = "/dev/disk/by-uuid/e6bb18fb-ff56-4b5f-ae9f-e60d40dc0622"; };
  12     "/etc"  = { fsType = "zfs"; device = "zpool/root/etc"; };
  13     "/nix"  = { fsType = "zfs"; device = "zpool/root/nix"; };
  14     "/tmp"  = { fsType = "zfs"; device = "zpool/root/tmp"; };
  15     "/var"  = { fsType = "zfs"; device = "zpool/root/var"; };
  16   };
  17   boot.initrd.secrets = {
  18     "/boot/pass.key" = "/boot/pass.key";
  19   };
  20
  21   services.zfs = {
  22     autoSnapshot = {
  23       enable = true;
  24     };
  25     autoScrub = {
  26       enable = true;
  27     };
  28   };
  29   networking = {
  30     hostId = "8262ca33"; # generated with head -c4 /dev/urandom | od -A none -t x4
  31     firewall.enable = true;
  32     # 176.9.151.89 declared in nixops -> infra / tools
  33     interfaces."eth0".ipv4.addresses = pkgs.lib.attrsets.mapAttrsToList
  34       (n: ips: { address = ips.ip4; prefixLength = 32; })
  35       (pkgs.lib.attrsets.filterAttrs (n: v: n != "main") config.hostEnv.ips);
  36     interfaces."eth0".ipv6.addresses = pkgs.lib.flatten (pkgs.lib.attrsets.mapAttrsToList
  37       (n: ips: map (ip: { address = ip; prefixLength = (if n == "main" && ip == pkgs.lib.head ips.ip6 then 64 else 128); }) (ips.ip6 or []))
  38       config.hostEnv.ips);
  39   };
  40
  41   imports = builtins.attrValues (import ../..);
  42
  43   boot.kernel.sysctl = {
  44     # https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
  45     "net.ipv4.tcp_sack" = 0;
  46   };
  47   myServices.buildbot.enable = true;
  48   myServices.databases.enable = true;
  49   myServices.gitolite.enable = true;
  50   myServices.monitoring.enable = true;
  51   myServices.irc.enable = true;
  52   myServices.pub.enable = true;
  53   myServices.tasks.enable = true;
  54   myServices.mpd.enable = true;
  55   myServices.dns.enable = true;
  56   myServices.certificates.enable = true;
  57   myServices.websites.enable = true;
  58   myServices.mail.enable = true;
  59   myServices.ejabberd.enable = true;
  60   myServices.vpn.enable = true;
  61   services.pure-ftpd.enable = true;
  62   services.duplyBackup.enable = true;
  63   services.duplyBackup.profiles.oldies.rootDir = "/var/lib/oldies";
  64
  65   secrets.keys = [
  66     {
  67       dest = "rsync_backup/identity";
  68       user = "root";
  69       group = "root";
  70       permissions = "0400";
  71       text = config.myEnv.rsync_backup.ssh_key.private;
  72     }
  73   ];
  74   programs.ssh.knownHosts.dilion = {
  75     hostNames = ["dilion.immae.eu"];
  76     publicKey = let
  77       profile = config.myEnv.rsync_backup.profiles.dilion;
  78     in
  79       "${profile.host_key_type} ${profile.host_key}";
  80   };
  81
  82   deployment = {
  83     targetEnv = "hetzner";
  84     hetzner = {
  85       robotUser = config.myEnv.hetzner.user;
  86       robotPass = config.myEnv.hetzner.pass;
  87       mainIPv4 = config.hostEnv.ips.main.ip4;
  88       partitions = ''
  89         clearpart --all --initlabel --drives=sda,sdb
  90
  91         part swap1 --recommended --label=swap1 --fstype=swap --ondisk=sda
  92         part swap2 --recommended --label=swap2 --fstype=swap --ondisk=sdb
  93
  94         part raid.1 --grow --ondisk=sda
  95         part raid.2 --grow --ondisk=sdb
  96
  97         raid / --level=1 --device=md0 --fstype=ext4 --label=root raid.1 raid.2
  98       '';
  99     };
 100   };
 101
 102   services.cron = {
 103     enable = true;
 104     mailto = "cron@immae.eu";
 105     systemCronJobs = [
 106       ''
 107         # The star after /var/lib/* avoids deleting all folders in case of problem
 108         0 3,9,15,21 * * * root rsync -e "ssh -i /var/secrets/rsync_backup/identity" --new-compress -aAXv --delete --numeric-ids --super --rsync-path="sudo rsync" /var/lib/* backup@dilion.immae.eu: > /dev/null
 109         0 0 * * * root journalctl -q --since="25 hours ago" -u postfix -t postfix/smtpd -g "immae.eu.*Recipient address rejected"
 110         # Need a way to blacklist properly
 111         # 0 0 * * * root journalctl -q --since="25 hours ago" -u postfix -t postfix/smtpd -g "NOQUEUE:"
 112         0 0 * * * root journalctl -q --since="25 hours ago" -u postfix -t postfix/smtp -g "status=bounced"
 113       ''
 114     ];
 115   };
 116
 117   fileSystems."/var/lib/pub/immae/devtools" = {
 118     device = "/run/current-system/sw/bin/bindfs#/var/lib/ftp/devtools.immae.eu/";
 119     fsType = "fuse";
 120     options = [ "force-user=pub" "create-for-user=wwwrun" "create-for-group=wwwrun" ];
 121   };
 122   environment.systemPackages = [ pkgs.bindfs ];
 123
 124   # This value determines the NixOS release with which your system is
 125   # to be compatible, in order to avoid breaking some software such as
 126   # database servers. You should change this only after NixOS release
 127   # notes say you should.
 128   # https://nixos.org/nixos/manual/release-notes.html
 129   system.stateVersion = "20.03"; # Did you read the comment?
 130 }