From 467e83722a35e81d067eee5b51d3a417cf2a2feb Mon Sep 17 00:00:00 2001
From: Calle Pettersson <carlpett@users.noreply.github.com>
Date: Sun, 29 Apr 2018 16:53:34 +0200
Subject: [PATCH] Add process_start_time_seconds for the exporter itself

---
 exporter.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/exporter.go b/exporter.go
index 203baf5a..94586c9a 100644
--- a/exporter.go
+++ b/exporter.go
@@ -44,6 +44,16 @@ var (
 		[]string{"collector"},
 		nil,
 	)
+
+	// This can be removed when client_golang exposes this on Windows
+	// (See https://github.com/prometheus/client_golang/issues/376)
+	startTime = float64(time.Now().Unix())
+	startTimeDesc = prometheus.NewDesc(
+		"process_start_time_seconds",
+		"Start time of the process since unix epoch in seconds.",
+		nil,
+		nil,
+	)
 )
 
 // Describe sends all the descriptors of the collectors included to
@@ -65,6 +75,12 @@ func (coll WmiCollector) Collect(ch chan<- prometheus.Metric) {
 			wg.Done()
 		}(name, c)
 	}
+
+	ch <- prometheus.MustNewConstMetric(
+		startTimeDesc,
+		prometheus.CounterValue,
+		startTime,
+	)
 	wg.Wait()
 }