{ config, pkgs, lib, ... }:
with lib;

{
  imports =
    [
      ./hardware-configuration.nix
    ];
  boot.loader.grub.enable = true;
  boot.loader.grub.version = 2;
  boot.loader.grub.device = "/dev/sda";
  networking.hostName = "monitoring";
  networking.useDHCP = false;
  networking.interfaces.ens18.ipv4.addresses = [ { address = ""; prefixLength = 24; } ];
  networking.interfaces.ens18.ipv6.addresses = [ { address = ""; prefixLength = 64; } ];
  networking.defaultGateway = { address = "10.42.10.1"; interface = "ens18"; };
  networking.defaultGateway6 = { address = "2a01:4f8:1c0c:8221::1"; interface = "ens18"; };
  networking.nameservers = [ "2a01:4f8:1c0c:8221::1" "10.42.10.1" ];
  services.prometheus.exporters.node.enable = true;
  services.prometheus.alertmanager = {
    enable = true;
    listenAddress = "[::1]";
    port = 9093;
    configuration = {};
  };
  services.prometheus = {
    enable = true;
    listenAddress = "[::1]";
    scrapeConfigs = [
      {
        job_name = "prometheus";
        scrape_interval = "20s";
        scheme = "http";
        static_configs = [
          {
            targets = [
              "[::1]:9090"
            ];
          }
        ];
      }
      {
        job_name = "node-exporter";
        scrape_interval = "20s";
        static_configs = [
          {
            targets = [
              "[::1]:9100"
            ];
          }
        ];
      }
    ];
    alertmanagers = [
      {
        static_configs = [ {
          targets = [
            "[::1]:9093"
          ];
        } ];
      }
    ];
    rules = [ (readFile ./rules.yml) ];
  };
  services.grafana = {
    enable  = true;
    domain  = "grafana.bula22.de";
    rootUrl = "https://grafana.bula22.de";
    port    = 3001;
    addr = "::1";
    auth.anonymous.enable = true;
    provision = {
      enable = true;
      datasources = [
        {
          type = "prometheus";
          name = "Prometheus";
          url = "http://[::1]:9090";
          isDefault = true;
        }
      ];
      dashboards = [
        {
          options.path = ./dashboards;
        }
      ];
    };
  };
  services.nginx = {
    enable = true;
    virtualHosts = {
      "prometheus.bula22.de" = {
        enableACME = true;
        forceSSL   = true;
        locations."/".proxyPass = "http://[::1]:9090/";
      };
      "grafana.bula22.de" = {
        enableACME = true;
        forceSSL   = true;
        locations."/".proxyPass = "http://[::1]:3001/";
      };
    };
  };
  networking.firewall.allowedTCPPorts = [ 80 443 ];
  system.stateVersion = "";
}