nixos/prometheus-pihole-exporter: update configuration options

The `interval` configuration option doesn't exist and has been removed.
The `timeout` configuration option has been added.

nixos/doc/manual/from_md/release-notes/rl-2305.section.xml

@@ -878,6 +878,13 @@
           been fixed to allow more than one plugin in the path.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          The option
+          <literal>services.prometheus.exporters.pihole.interval</literal>
+          does not exist anymore and has been removed.
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
 </section>

nixos/doc/manual/release-notes/rl-2305.section.md

@@ -218,3 +218,5 @@ In addition to numerous new and upgraded packages, this release has the followin
 - `nixos-version` now accepts `--configuration-revision` to display more information about the current generation revision
 
 - The option `services.nomad.extraSettingsPlugins` has been fixed to allow more than one plugin in the path.
+
+- The option `services.prometheus.exporters.pihole.interval` does not exist anymore and has been removed.

nixos/modules/services/monitoring/prometheus/exporters/pihole.nix

@@ -6,68 +6,72 @@ let
   cfg = config.services.prometheus.exporters.pihole;
 in
 {
+  imports = [
+    (mkRemovedOptionModule [ "interval"] "This option has been removed.")
+    ({ options.warnings = options.warnings; options.assertions = options.assertions; })
+  ];
+
   port = 9617;
   extraOpts = {
     apiToken = mkOption {
       type = types.str;
       default = "";
       example = "580a770cb40511eb85290242ac130003580a770cb40511eb85290242ac130003";
       description = lib.mdDoc ''
-        pi-hole API token which can be used instead of a password
-      '';
-    };
-    interval = mkOption {
-      type = types.str;
-      default = "10s";
-      example = "30s";
-      description = lib.mdDoc ''
-        How often to scrape new data
+        Pi-Hole API token which can be used instead of a password
       '';
     };
     password = mkOption {
       type = types.str;
       default = "";
       example = "password";
       description = lib.mdDoc ''
-        The password to login into pihole. An api token can be used instead.
+        The password to login into Pi-Hole. An api token can be used instead.
       '';
     };
     piholeHostname = mkOption {
       type = types.str;
       default = "pihole";
       example = "127.0.0.1";
       description = lib.mdDoc ''
-        Hostname or address where to find the pihole webinterface
+        Hostname or address where to find the Pi-Hole webinterface
       '';
     };
     piholePort = mkOption {
       type = types.port;
       default = 80;
       example = 443;
       description = lib.mdDoc ''
-        The port pihole webinterface is reachable on
+        The port Pi-Hole webinterface is reachable on
       '';
     };
     protocol = mkOption {
       type = types.enum [ "http" "https" ];
       default = "http";
       example = "https";
       description = lib.mdDoc ''
-        The protocol which is used to connect to pihole
+        The protocol which is used to connect to Pi-Hole
+      '';
+    };
+    timeout = mkOption {
+      type = types.str;
+      default = "5s";
+      description = lib.mdDoc ''
+        Controls the timeout to connect to a Pi-Hole instance
       '';
     };
   };
   serviceOpts = {
     serviceConfig = {
       ExecStart = ''
-        ${pkgs.bash}/bin/bash -c "${pkgs.prometheus-pihole-exporter}/bin/pihole-exporter \
-          -interval ${cfg.interval} \
+        ${pkgs.prometheus-pihole-exporter}/bin/pihole-exporter \
           ${optionalString (cfg.apiToken != "") "-pihole_api_token ${cfg.apiToken}"} \
           -pihole_hostname ${cfg.piholeHostname} \
           ${optionalString (cfg.password != "") "-pihole_password ${cfg.password}"} \
           -pihole_port ${toString cfg.piholePort} \
           -pihole_protocol ${cfg.protocol} \
-          -port ${toString cfg.port}"
+          -port ${toString cfg.port} \
+          -timeout ${cfg.timeout}
       '';
     };
   };