Add nginx_up gauge

discordianfish · Mar 9, 2017 · e6c25ab · e6c25ab
1 parent 2d7dfd1
commit e6c25ab
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/nginx_exporter.go b/nginx_exporter.go
@@ -35,6 +35,7 @@ type Exporter struct {
  scrapeFailures prometheus.Counter
  processedConnections *prometheus.Desc
  currentConnections *prometheus.GaugeVec
+ nginxUp prometheus.Gauge
 }
 
 // NewExporter returns an initialized Exporter.
@@ -59,6 +60,11 @@ func NewExporter(uri string) *Exporter {
  },
  []string{"state"},
  ),
+ nginxUp: prometheus.NewGauge(prometheus.GaugeOpts{
+ Namespace: namespace,
+ Name: "up",
+ Help: "Whether the nginx is up.",
+ }),
  client: &http.Client{
  Transport: &http.Transport{
  TLSClientConfig: &tls.Config{InsecureSkipVerify: *insecure},
@@ -72,14 +78,17 @@ func NewExporter(uri string) *Exporter {
 func (e *Exporter) Describe(ch chan<- *prometheus.Desc) {
  ch <- e.processedConnections
  e.currentConnections.Describe(ch)
+ e.nginxUp.Describe(ch)
  e.scrapeFailures.Describe(ch)
 }
 
 func (e *Exporter) collect(ch chan<- prometheus.Metric) error {
  resp, err := e.client.Get(e.URI)
  if err != nil {
+ e.nginxUp.Set(0)
  return fmt.Errorf("Error scraping nginx: %v", err)
  }
+ e.nginxUp.Set(1)
 
  data, err := ioutil.ReadAll(resp.Body)
  resp.Body.Close()
@@ -163,6 +172,7 @@ func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
  e.scrapeFailures.Collect(ch)
  }
  e.currentConnections.Collect(ch)
+ e.nginxUp.Collect(ch)
  return
 }