CrOS/modules/services/system-logging/prometheus-server.nix

{
  services.prometheus = {
    enable = true;
    scrapeConfigs = [
      {
        job_name = "prometheus";
        scrape_interval = "5s";
        static_configs = [
          {
            targets = [
              "localhost:9090"
            ];
          }
        ];
      }
    ];
  };
}