NPS(feature): add nps collector

Signed-off-by: rebortg <github@ghlr.de>

docs/README.md

@@ -26,6 +26,7 @@ This directory contains documentation of the collectors in the windows_exporter,
 - [`netframework_clrremoting`](collector.netframework_clrremoting.md)
 - [`netframework_clrsecurity`](collector.netframework_clrsecurity.md)
 - [`net`](collector.net.md)
+- [`nps`](collector.nps.md)
 - [`os`](collector.os.md)
 - [`process`](collector.process.md)
 - [`remote_fx`](collector.remote_fx.md)

docs/collector.nps.md

@@ -0,0 +1,49 @@
+# nps collector
+
+The nps collector exposes metrics about the NPS server
+
+|||
+-|-
+Metric name prefix  | `nps`
+Classes             | Win32_PerfRawData_IAS_NPSAuthenticationServer<br/>Win32_PerfRawData_IAS_NPSAccountingServer
+Enabled by default? | No
+
+## Flags
+
+None
+
+## Metrics
+
+Name | Description | Type | Labels
+-----|-------------|------|-------
+`windows_nps_access_accepts` |  | counter | None
+`windows_nps_access_bad_authenticators` |  | counter | None
+`windows_nps_access_challenges` |  | counter | None
+`windows_nps_access_dropped_packets` |  | counter | None
+`windows_nps_access_invalid_requests` |  | counter | None
+`windows_nps_access_malformed_packets` |  | counter | None
+`windows_nps_access_packets_received` |  | counter | None
+`windows_nps_access_packets_sent` |  | counter | None
+`windows_nps_access_rejects` |  | counter | None
+`windows_nps_access_requests` |  | counter | None
+`windows_nps_access_server_reset_time` |  | counter | None
+`windows_nps_access_server_up_time` |  | counter | None
+`windows_nps_access_unknown_type` |  | counter | None
+`windows_nps_accounting_bad_authenticators` |  | counter | None
+`windows_nps_accounting_dropped_packets` |  | counter | None
+`windows_nps_accounting_invalid_requests` |  | counter | None
+`windows_nps_accounting_malformed_packets` |  | counter | None
+`windows_nps_accounting_no_record` |  | counter | None
+`windows_nps_accounting_packets_received` |  | counter | None
+`windows_nps_accounting_packets_sent` |  | counter | None
+`windows_nps_accounting_requests` |  | counter | None
+`windows_nps_accounting_responses` |  | counter | None
+`windows_nps_accounting_server_reset_time` |  | counter | None
+`windows_nps_accounting_server_up_time` |  | counter | None
+`windows_nps_accounting_unknown_type` |  | counter | None
+
+### Example metric
+Show current number of processes
+```
+windows_nps_access_accepts{instance="localhost"}
+```