1 files changed, 309 insertions, 0 deletions

diff --git a/systems/dilion/base.nix b/systems/dilion/base.nix
new file mode 100644
index 0000000..ac4bdaf
--- /dev/null
+++ b/systems/dilion/base.nix
@@ -0,0 +1,309 @@
+{ config, pkgs, name, lib, pkgs-no-overlay, secrets, ... }:
+{
+  # ssh-keyscan dilion | nix-shell -p ssh-to-age --run ssh-to-age
+  secrets.ageKeys = [ "age1x49n6qa0arkdpq8530s7umgm0gqkq90exv4jep97q30rfnzknpaqate06a" ];
+  boot = {
+    loader = {
+      grub = {
+        devices = [ "/dev/sda" "/dev/sdb" "/dev/sdc" "/dev/sdd" ];
+      };
+      timeout = 1;
+    };
+    blacklistedKernelModules = [ "nvidiafb" ];
+    supportedFilesystems = [ "zfs" ];
+    kernelPackages = config.boot.zfs.package.latestCompatibleLinuxPackages;
+    kernelModules = [ "kvm-intel" ];
+    initrd.availableKernelModules = [ "ahci" "sd_mod" ];
+    initrd.secrets = {
+      "/boot/pass.key" = "/boot/pass.key";
+    };
+    kernel.sysctl."vm.nr_hugepages" = 256; # for xmr-stak
+    # available in nixos-20.09
+    #zfs.requestEncryptionCredentials = [ "zpool/root" ];
+  };
+  powerManagement.cpuFreqGovernor = "powersave";
+  hardware.enableRedistributableFirmware = true;
+
+  swapDevices = [ { label = "swap"; } ];
+  fileSystems = {
+    "/"           = { fsType = "zfs"; device = "zpool/root"; };
+    "/boot"       = { fsType = "ext4"; device = "/dev/disk/by-uuid/fd1c511e-2bc0-49d5-b8bb-95e7e8c8c816"; };
+    "/etc"        = { fsType = "zfs"; device = "zpool/root/etc"; };
+    "/home"       = { fsType = "zfs"; device = "zpool/root/home"; };
+    "/home/immae" = { fsType = "zfs"; device = "zpool/root/home/immae"; };
+    "/tmp"        = { fsType = "zfs"; device = "zpool/root/tmp"; };
+    "/var"        = { fsType = "zfs"; device = "zpool/root/var"; };
+    "/data"       = { fsType = "ext4"; label = "data"; };
+    "/nix"        = { fsType = "ext4"; label = "nix"; };
+  };
+
+  services.udev.extraRules = ''
+    ACTION=="add", SUBSYSTEM=="net", ATTR{address}=="10:bf:48:7f:e6:3b", NAME="eth0"
+  '';
+
+  nixpkgs.config.permittedInsecurePackages = [
+    "python-2.7.18.6" # for nagios-cli
+  ];
+
+  networking = {
+    hostId = "27c3048d"; # generated with head -c4 /dev/urandom | od -A none -t x4
+    firewall.enable = false;
+    interfaces."eth0".ipv4.addresses =
+      [ { address = lib.head config.hostEnv.ips.main.ip4; prefixLength = 27; } ]
+      ++ pkgs.lib.flatten (pkgs.lib.attrsets.mapAttrsToList
+        (n: ips: map (ip: { address = ip; prefixLength = 32; }) (ips.ip4 or []))
+        (pkgs.lib.attrsets.filterAttrs (n: v: n != "main") config.hostEnv.ips));
+    interfaces."eth0".ipv6.addresses =
+      [ { address = "2a01:4f8:141:53e7::"; prefixLength = 64; } ]
+      ++ pkgs.lib.flatten (pkgs.lib.attrsets.mapAttrsToList
+        (n: ips: map (ip: { address = ip; prefixLength = (if n == "main" && ip == pkgs.lib.head ips.ip6 then 64 else 128); }) (ips.ip6 or []))
+        config.hostEnv.ips);
+    defaultGateway = { address = "176.9.10.225"; interface = "eth0"; };
+    defaultGateway6 = { address = "fe80::1"; interface = "eth0"; };
+    nameservers = [
+      "213.133.98.98"
+      "213.133.99.99"
+      "213.133.100.100"
+      "2a01:4f8:0:a0a1::add:1010"
+      "2a01:4f8:0:a102::add:9999"
+      "2a01:4f8:0:a111::add:9898"
+    ];
+  };
+
+  myServices.ssh.modules.regular.snippet = builtins.readFile ./ssh_ldap_regular.sh;
+
+  imports = [
+    secrets.nixosModules.users-config-dilion
+    ./monitoring.nix
+    ./vms.nix
+  ];
+
+  myServices.vms.libvirt-guests = {
+    buildbot = {
+      pool = "zfspool";
+      network = "immae";
+      cpus = 1;
+      memory = 3;
+      diskSize = 10;
+      destroyVolumeOnExit = true;
+    };
+  };
+  myServices.vms.libvirt-images = {
+    nixos = ./vms/base_configuration.nix;
+    buildbot = ./vms/buildbot_configuration.nix;
+  };
+  myServices.vms.libvirt-networks.immae = {
+    bridgeNumber = 1;
+    ipRange = "192.168.100";
+  };
+  myServices.vms.libvirt-pools = {
+    niximages = {
+      type = "dir";
+      target = "/etc/libvirtd/base-images";
+    };
+    buildbot-disks = rec {
+      type = "dir";
+      target = "/var/lib/libvirt/images/buildbot-disks";
+      preStart = ''
+        mkdir -p ${target}
+      '';
+    };
+    zfspool = {
+      # pool-define-as --name zfspool --source-name zpool/libvirt --type zfs
+      type = "zfs";
+      xml = ''
+        <source>
+          <name>zpool/libvirt</name>
+        </source>
+      '';
+    };
+  };
+
+  system.nssModules = [ pkgs.libvirt ];
+  system.nssDatabases.hosts = lib.mkForce [ "files" "libvirt_guest" "mymachines" "dns" "myhostname" ];
+  programs.zsh.enable = true;
+
+  users.users.libvirt = {
+    hashedPassword = "!";
+    shell = pkgs.bashInteractive;
+    isSystemUser = true;
+    group = "libvirtd";
+    packages = [ pkgs.libressl.nc ];
+    openssh.authorizedKeys.keys = [
+      config.myEnv.buildbot.ssh_key.public
+      config.myEnv.sshd.rootKeys.ismael_flony
+    ];
+  };
+
+  users.groups.backup = {};
+  users.users.backup = {
+    hashedPassword = "!";
+    isSystemUser = true;
+    extraGroups = [ "keys" ];
+    group = "backup";
+    shell = pkgs.bashInteractive;
+    openssh.authorizedKeys.keys = let
+      zreplConfig = "/etc/zrepl/zrepl.yml";
+    in
+      ["command=\"${pkgs.zrepl}/bin/zrepl stdinserver --config ${zreplConfig} eldiron\",restrict ${config.myEnv.zrepl_backup.ssh_key.public}"];
+  };
+  security.sudo.extraRules = pkgs.lib.mkAfter [
+    {
+      commands = [
+        { command = "/home/immae/.nix-profile/root_scripts/*"; options = [ "NOPASSWD" ]; }
+      ];
+      users = [ "immae" ];
+      runAs = "root";
+    }
+  ];
+
+  virtualisation.docker.enable = true;
+  virtualisation.docker.storageDriver = "zfs";
+  virtualisation.libvirtd.enable = true;
+  virtualisation.libvirtd.qemu.package = pkgs-no-overlay.qemu;
+  systemd.services.libvirtd.path = lib.mkAfter [ config.boot.zfs.package ];
+  users.groups.immae = {};
+  users.extraUsers.immae.extraGroups = [ "immae" "libvirtd" "docker" ];
+  systemd.services.libvirtd.postStart = ''
+    install -m 0770 -g libvirtd -d /var/lib/libvirt/images
+  '';
+
+  time.timeZone = "Europe/Paris";
+  nix = {
+    settings = {
+      sandbox = "relaxed";
+      max-jobs = 8;
+      substituters = [ "https://hydra.iohk.io" "https://cache.nixos.org" ];
+      trusted-public-keys = [ "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ=" ];
+      trusted-users = [ "root" "@wheel"] ;
+    };
+    extraOptions = ''
+      keep-outputs = true
+      keep-derivations = true
+      allow-unsafe-native-code-during-evaluation = true
+      experimental-features = nix-command flakes
+      #Assumed in NUR
+      allow-import-from-derivation = true
+    '';
+  };
+
+  security.pki.certificateFiles = [
+    (pkgs.fetchurl {
+      url = "http://downloads.e.eriomem.net/eriomemca.pem";
+      sha256 = "1ixx4c6j3m26j8dp9a3dkvxc80v1nr5aqgmawwgs06bskasqkvvh";
+    })
+  ];
+
+  myServices.monitoring.enable = true;
+  security.acme.certs."${name}-immae" = {
+    group = "immae";
+    domain = "dilion.immae.eu";
+  };
+  security.acme.certs."${name}" = {
+    group = config.services.nginx.group;
+    extraDomainNames = [
+      "dilion.immae.dev"
+    ];
+  };
+  systemd.services.nginx.serviceConfig.ProtectHome = "read-only";
+  services.nginx = {
+    enable = true;
+    recommendedOptimisation = true;
+    recommendedGzipSettings = true;
+    recommendedProxySettings = true;
+    virtualHosts = {
+      "dilion.immae.dev" = {
+        acmeRoot = config.security.acme.defaults.webroot;
+        useACMEHost = name;
+        forceSSL = true;
+        locations."/".root = "/home/immae/www";
+      };
+    };
+  };
+
+  secrets.keys = {
+    "zrepl/${name}.key" = {
+      permissions = "0400";
+      text = config.myEnv.zrepl_backup.certs."${name}".key;
+      user = "backup";
+      group = "root";
+    };
+  } // builtins.listToAttrs (map (x: lib.attrsets.nameValuePair "zrepl/certificates/${x}.crt" {
+    permissions = "0400";
+    text = config.myEnv.zrepl_backup.certs."${x}".certificate;
+    user = "backup";
+    group = "root";
+  }) (builtins.attrNames config.myEnv.zrepl_backup.certs));
+
+  environment.etc."mdadm.conf" = {
+    enable = true;
+    mode = "0644";
+    user = "root";
+    text = "MAILADDR ${config.myEnv.monitoring.email}";
+  };
+
+
+  systemd.services.zrepl.serviceConfig.User = "backup";
+  systemd.services.zrepl.path = [ pkgs.openssh ];
+  # pour eldiron:
+  # zfs allow backup create,mount,receive,destroy,rename,snapshot,hold,bookmark,release zpool/backup
+  # pour flony:
+  # zfs allow backup hold,release,bookmark,snapshot,send zpool
+  services.zrepl = {
+    enable = true;
+    settings = {
+      global.control.sockpath = "/run/zrepl/control";
+      global.serve.stdinserver.sockdir = "/run/zrepl/stdinserver";
+      jobs = [
+        {
+          type = "sink";
+          # must not change
+          name = "backup-from-eldiron";
+          root_fs = "zpool/backup";
+          serve.type = "tls";
+          serve.listen = ":19000";
+          serve.ca = config.secrets.fullPaths."zrepl/certificates/eldiron.crt";
+          serve.cert = config.secrets.fullPaths."zrepl/certificates/dilion.crt";
+          serve.key = config.secrets.fullPaths."zrepl/dilion.key";
+          serve.client_cns = [ "eldiron" ];
+        }
+        {
+          type = "source";
+          # must not change
+          name = "backup-to-wd-zpool";
+          # not encrypted!
+          serve.type = "tls";
+          serve.listen = ":19001";
+          serve.ca = config.secrets.fullPaths."zrepl/certificates/flony.crt";
+          serve.cert = config.secrets.fullPaths."zrepl/certificates/dilion.crt";
+          serve.key = config.secrets.fullPaths."zrepl/dilion.key";
+          serve.client_cns = [ "flony" ];
+          filesystems."zpool/libvirt<" = true;
+          filesystems."zpool/root<" = true;
+          snapshotting.type = "manual";
+        }
+        {
+          type = "source";
+          # must not change
+          name = "backup-to-wd-zpool-docker";
+          # not encrypted!
+          serve.type = "tls";
+          serve.listen = ":19002";
+          serve.ca = config.secrets.fullPaths."zrepl/certificates/flony.crt";
+          serve.cert = config.secrets.fullPaths."zrepl/certificates/dilion.crt";
+          serve.key = config.secrets.fullPaths."zrepl/dilion.key";
+          serve.client_cns = [ "flony" ];
+          filesystems."zpool/docker<" = true;
+          snapshotting.type = "manual";
+        }
+      ];
+    };
+  };
+  # This value determines the NixOS release with which your system is
+  # to be compatible, in order to avoid breaking some software such as
+  # database servers. You should change this only after NixOS release
+  # notes say you should.
+  # https://nixos.org/nixos/manual/release-notes.html
+  system.stateVersion = "23.05"; # Did you read the comment?
+}
+