os/modules/wireguard/pub.solar.nix

{
  lib,
  config,
  pkgs,
  ...
}:
with lib; let
  psCfg = config.pub-solar;
  cfg = config.pub-solar.wireguard.pub-solar;
in {
  options.pub-solar.wireguard.pub-solar = {
    ownIPs = mkOption {
      description = "Internal ips in wireguard used for cluster control-plane communication.";
      type = types.listOf types.str;
      default = [];
    };

    privateKeyFile = mkOption {
      description = "Location of private key file";
      type = types.path;
    };
  };

  config = mkIf (length cfg.ownIPs != 0){
    networking.firewall.allowedUDPPorts = [51821];

    systemd.services.wireguard-wg-pub-solar = {
      after = [
        "network.target"
        "network-online.target"
        "nss-lookup.target"
      ];

      serviceConfig = {
        Type = mkForce "simple";
        Restart = "on-failure";
        RestartSec = "30";
      };

      environment = {
        WG_ENDPOINT_RESOLUTION_RETRIES = "infinity";
      };
    };

    networking.wireguard.interfaces = {
      wg-pub-solar = {
        listenPort = 51821;
        mtu = 1300;
        ips = cfg.ownIPs;
        privateKeyFile = cfg.privateKeyFile;
        peers = [
          {
            endpoint = "flora-6.pub.solar:51820";
            publicKey = "jtSR5G2P/nm9s8WrVc26Xc/SQLupRxyXE+5eIeqlsTU=";
            allowedIPs = [ "10.7.6.2/32" "fd00:fae:fae:fae:fae:2::/96" ];
            persistentKeepalive = 15;
            dynamicEndpointRefreshSeconds = 30;
          }
          {
            endpoint = "nachtigall.pub.solar:51820";
            publicKey = "qzNywKY9RvqTnDO8eLik75/SHveaSk9OObilDzv+xkk=";
            allowedIPs = [ "10.7.6.1/32" "fd00:fae:fae:fae:fae:1::/96" ];
            persistentKeepalive = 15;
            dynamicEndpointRefreshSeconds = 30;
          }
        ];
      };
    };
  };
}