prometheus-configuration.nix.nix

{
  services.nginx.virtualHosts."hostname".locations."/prometheus".proxyPass = "http://127.0.0.1:9090";

  services.prometheus.enable = true;
  services.prometheus.stateDir = "prometheus2";
  services.prometheus.extraFlags = [ "--web.external-url=http://hostname/prometheus/" "--storage.tsdb.retention.time=3d" ];
  services.prometheus.scrapeConfigs = [
    {
      job_name = "node";
      static_configs = [{ targets = ["hostname:9100"]; labels.distro = "nixos"; }];
    }
  ];
  services.prometheus.exporters.node.enable = true;
  services.prometheus.exporters.node.enabledCollectors = [ "systemd" ];
}