{
  config,
  pkgs,
  ...
}: {
  services.grafana = {
    enable = true;
    settings.server = {
      domain = "grafana.elnafo.ru";
      http_port = 2342;
      http_addr = "127.0.0.1";
    };
  };

  services.prometheus = {
    enable = true;
    port = 9090;
    globalConfig.scrape_interval = "10s"; # "1m"

    exporters = {
      node = {
        enable = true;
        enabledCollectors = ["systemd"];
        port = 9092;
      };
    };
    scrapeConfigs = [
      {
        job_name = "catarina";
        static_configs = [
          {
            targets = ["127.0.0.1:${toString config.services.prometheus.exporters.node.port}"];
          }
        ];
      }
    ];
  };

  services.loki = {
    enable = true;
    configuration = {
      auth_enabled = false;
      server = {
        http_listen_port = 3100;
      };
      common = {
        ring = {
          instance_addr = "127.0.0.1";
          kvstore = {
            store = "inmemory";
          };
        };
        replication_factor = 1;
        path_prefix = "/tmp/loki";
      };
      schema_config = {
        configs = [
          {
            from = "2020-05-15";
            store = "tsdb";
            object_store = "filesystem";
            schema = "v13";
            index = {
              prefix = "index_";
              period = "24h";
            };
          }
        ];
      };
      storage_config = {
        filesystem = {
          directory = "/tmp/loki/chunks";
        };
      };
    };
  };

  services.promtail = {
    enable = true;
    configuration = {
      server = {
        http_listen_port = 3101;
        grpc_listen_port = 0;
      };
      clients = [
        {
          url = "http://127.0.0.1:3100/loki/api/v1/push";
        }
      ];
      scrape_configs = [
        {
          job_name = "journal";
          journal = {
            max_age = "12h";
            labels = {
              job = "systemd-journal";
              host = "catarina";
            };
          };
          relabel_configs = [
            {
              source_labels = [
                "__journal__systemd_unit"
              ];
              target_label = "unit";
            }
          ];
        }
      ];
    };
  };

  services.nginx = {
    virtualHosts."grafana.elnafo.ru" = {
      forceSSL = true;
      useACMEHost = "elnafo.ru";
      locations."/" = {
        proxyPass = "http://127.0.0.1:${toString config.services.grafana.port}";
        proxyWebsockets = true;
      };
    };
  };
}