inputs:

{ config, ... }:

{
  imports = [
    (import ./monitoring-target.nix inputs)
  ];

  services.prometheus = {
    enable = true;

    listenAddress = "127.0.0.1";

    # TODO: for NixOS 21.05
    extraFlags = [ "--storage.tsdb.retention=15w" ];
    #retentionTime = "15w";

    scrapeConfigs = [
      {
        job_name = "prometheus";
        static_configs = [
          { targets = [ "localhost:${toString config.services.prometheus.port}" ]; }
        ];
      }

      {
        job_name = "node_exporter";
        static_configs = [
          { targets = [ "localhost:${toString config.services.prometheus.exporters.node.port}" ]; }
        ];
      }

      {
        job_name = "grafana";
        static_configs = [
          { targets = [ "localhost:${toString config.services.grafana.port}" ]; }
        ];
      }
    ];
  };

  services.grafana = {
    enable = true;

    addr = config.topology.mainVpn.currentNodeIP;
    port = 3001;

    analytics.reporting.enable = false;
  };

  networking.firewall.interfaces.${config.topology.mainVpn.interfaceName}.allowedTCPPorts = [
    config.services.grafana.port
  ];
}