Add input plugin for VMware vSphere (#4141)

plugins/inputs/vsphere/selfhealth.go

@@ -0,0 +1,53 @@
+package vsphere
+
+import (
+	"time"
+
+	"github.com/influxdata/telegraf/selfstat"
+)
+
+// Stopwatch is a simple helper for recording timing information,
+// such as gather times and discovery times.
+type Stopwatch struct {
+	stat  selfstat.Stat
+	start time.Time
+}
+
+// NewStopwatch creates a new StopWatch and starts measuring time
+// its creation.
+func NewStopwatch(name, vCenter string) *Stopwatch {
+	return &Stopwatch{
+		stat:  selfstat.RegisterTiming("vsphere", name+"_ns", map[string]string{"vcenter": vCenter}),
+		start: time.Now(),
+	}
+}
+
+// NewStopwatchWithTags creates a new StopWatch and starts measuring time
+// its creation. Allows additional tags.
+func NewStopwatchWithTags(name, vCenter string, tags map[string]string) *Stopwatch {
+	tags["vcenter"] = vCenter
+	return &Stopwatch{
+		stat:  selfstat.RegisterTiming("vsphere", name+"_ns", tags),
+		start: time.Now(),
+	}
+}
+
+// Stop stops a Stopwatch and records the time.
+func (s *Stopwatch) Stop() {
+	s.stat.Set(time.Since(s.start).Nanoseconds())
+}
+
+// SendInternalCounter is a convenience method for sending
+// non-timing internal metrics.
+func SendInternalCounter(name, vCenter string, value int64) {
+	s := selfstat.Register("vsphere", name, map[string]string{"vcenter": vCenter})
+	s.Set(value)
+}
+
+// SendInternalCounterWithTags is a convenience method for sending
+// non-timing internal metrics. Allows additional tags
+func SendInternalCounterWithTags(name, vCenter string, tags map[string]string, value int64) {
+	tags["vcenter"] = vCenter
+	s := selfstat.Register("vsphere", name, tags)
+	s.Set(value)
+}