{
  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 = "/var/lib/loki";
      };

      schema_config = {
        configs = [
          {
            from = "2020-10-24";
            store = "tsdb";
            object_store = "filesystem";
            schema = "v13";
            index = {
              prefix = "index_";
              period = "24h";
            };
          }
        ];
      };

      storage_config = {
        filesystem = {
          directory = "/var/lib/loki/chunks";
        };
      };
    };
  };

  services.grafana = {
    enable = true;
    settings = {
      server = {
        http_addr = "0.0.0.0";
        http_port = 3003;
      };
      "auth.anonymous" = {
        enabled = true;
        org_name = "Main Org.";
        org_role = "Admin";
      };
    };

    provision = {
      enable = true;
      datasources.settings.datasources = [
        {
          name = "Loki";
          type = "loki";
          access = "proxy";
          url = "http://127.0.0.1:3100";
          isDefault = true;
        }
      ];
    };
  };
}