flake/nixos/profiles/prometheus/default.nix

{ config, lib, ... }:
{
  services.prometheus.exporters.node = {
    enable = true;
    listenAddress = "127.0.0.1";
    port = 9091;
    enabledCollectors = [ "systemd" ];
  };

  services.caddy.settings.apps.http.servers.srv0.metrics = { };
  services.caddy.settings.apps.http.servers.srv0.routes = [
    {
      match = lib.singleton {
        host = [ config.networking.fqdn ];
        path = [ "/metrics" ];
      };
      handle = [
        {
          handler = "authentication";
          providers.http_basic.accounts = lib.singleton {
            username = "prometheus";
            password = "$2a$14$2Phk4tobM04H4XiGegB3TuEXkyORCKMKW8TptYPTPXUWmZgtGBj/.";
          };
        }
        {
          handler = "reverse_proxy";
          upstreams = lib.singleton { dial = "127.0.0.1:9091"; };
        }
      ];
    }
    {
      match = lib.singleton {
        host = [ config.networking.fqdn ];
        path = [ "/caddy" ];
      };
      handle = [
        {
          handler = "authentication";
          providers.http_basic.accounts = lib.singleton {
            username = "prometheus";
            password = "$2a$14$2Phk4tobM04H4XiGegB3TuEXkyORCKMKW8TptYPTPXUWmZgtGBj/.";
          };
        }
        {
          handler = "metrics";
        }
      ];
    }
  ];
}