nixos/prometheus: remove tor exporter

- The `services.prometheus.exporters.minio` option has been removed, as it's upstream implementation was broken and unmaintained.

  Minio now has built-in [Prometheus metrics exposure](https://min.io/docs/minio/linux/operations/monitoring/collect-minio-metrics-using-prometheus.html), which can be used instead.

- The `services.prometheus.exporters.tor` option has been removed, as its upstream implementation was broken and unmaintained.

- The `services.patroni.raft` option has been removed, as Raft has been [deprecated by upstream since 3.0.0](https://github.com/patroni/patroni/blob/master/docs/releases.rst#version-300)

- `services.roundcube.maxAttachmentSize` will multiply the value set with `1.37` to offset overhead introduced by the base64 encoding applied to attachments.

    "statsd"

    "surfboard"

    "systemd"

    "tor"

    "unbound"

    "unifi"

    "unpoller"

          The Minio exporter has been removed, as it was broken and unmaintained.

          See the 24.11 release notes for more information.

        '')

        (lib.mkRemovedOptionModule [ "tor" ] ''

          The Tor exporter has been removed, as it was broken and unmaintained.

        '')

      ];

    };

    description = "Prometheus exporter configuration";

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

let

  cfg = config.services.prometheus.exporters.tor;

  inherit (lib) mkOption types concatStringsSep;

in

{

  port = 9130;

  extraOpts = {

    torControlAddress = mkOption {

      type = types.str;

      default = "127.0.0.1";

      description = ''

        Tor control IP address or hostname.

      '';

    };

    torControlPort = mkOption {

      type = types.port;

      default = 9051;

      description = ''

        Tor control port.

      '';

    };

  };

  serviceOpts = {

    serviceConfig = {

      ExecStart = ''

        ${pkgs.prometheus-tor-exporter}/bin/prometheus-tor-exporter \

          -b ${cfg.listenAddress} \

          -p ${toString cfg.port} \

          -a ${cfg.torControlAddress} \

          -c ${toString cfg.torControlPort} \

          ${concatStringsSep " \\\n  " cfg.extraFlags}

      '';

    };

    # CPython requires a process to either have $HOME defined or run as a UID

    # defined in /etc/passwd. The latter is false with DynamicUser, so define a

    # dummy $HOME. https://bugs.python.org/issue10496

    environment = { HOME = "/var/empty"; };

  };

}

      '';

    };

    tor = {

      exporterConfig = {

        enable = true;

      };

      metricProvider = {

        # Note: this does not connect the test environment to the Tor network.

        # Client, relay, bridge or exit connectivity are disabled by default.

        services.tor.enable = true;

        services.tor.settings.ControlPort = 9051;

      };

      exporterTest = ''

        wait_for_unit("tor.service")

        wait_for_open_port(9051)

        wait_for_unit("prometheus-tor-exporter.service")

        wait_for_open_port(9130)

        succeed("curl -sSf localhost:9130/metrics | grep 'tor_version{.\\+} 1'")

      '';

    };

    unpoller = {

      nodeName = "unpoller";

      exporterConfig.enable = true;

          --add-flags "$out/share/prometheus-tor-exporter.py"

  '';

  passthru.tests = { inherit (nixosTests.prometheus-exporters) tor; };

  meta = with lib; {

    description = "Prometheus exporter that exposes metrics from a Tor daemon";

    mainProgram = "prometheus-tor-exporter";