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

{
  services.prometheus = {
    enable = true;

    globalConfig.scrape_interval = "15s";

    extraFlags = [
      # 3 years of retention
      "--storage.tsdb.retention=${toString (365 * 3)}d"
      "--web.enable-admin-api"
    ];

    scrapeConfigs = [{
      job_name = "node";
      static_configs = [{
        targets =
          [ "192.168.6.1:9100" "192.168.6.10:9100" "192.168.6.20:9100" ];
      }];
      relabel_configs = [
        {
          source_labels = [ "__address__" ];
          target_label = "instance";
          replacement = "nas";
          action = "replace";
          regex = "192.168.6.10:(.*)";
        }
        {
          source_labels = [ "__address__" ];
          target_label = "instance";
          replacement = "rtr";
          action = "replace";
          regex = "192.168.6.1:(.*)";
        }
        {
          source_labels = [ "__address__" ];
          target_label = "instance";
          replacement = "tahoe";
          action = "replace";
          regex = "192.168.6.20:(.*)";
        }
      ];
    }];
  };
}