rollback old nginx metrics

controllers/nginx/pkg/cmd/controller/metrics.go

@@ -43,7 +43,7 @@ func (em exeMatcher) MatchAndName(nacl common.NameAndCmdline) (bool, string) {
 func (n *NGINXController) setupMonitor(args []string) {
 	pc, err := newProcessCollector(true, exeMatcher{"nginx", args})
 	if err != nil {
-		glog.Fatalf("unexpected error registering nginx collector: %v", err)
+		glog.Warningf("unexpected error registering nginx collector: %v", err)
 	}
 	err = prometheus.Register(pc)
 	if err != nil {
@@ -199,17 +199,17 @@ func newProcessCollector(
 
 // Describe implements prometheus.Collector.
 func (p *namedProcessCollector) Describe(ch chan<- *prometheus.Desc) {
-	ch <- bytesDesc
-	ch <- cacheDesc
-	ch <- connectionsDesc
 	ch <- cpuSecsDesc
 	ch <- memResidentbytesDesc
 	ch <- memVirtualbytesDesc
-	ch <- numprocsDesc
+	ch <- startTimeDesc
+
+	ch <- bytesDesc
+	ch <- cacheDesc
+	ch <- connectionsDesc
 	ch <- readBytesDesc
 	ch <- requestDesc
 	ch <- responseDesc
-	ch <- startTimeDesc
 	ch <- writeBytesDesc
 	ch <- upstreamBackupDesc
 	ch <- upstreamBytesDesc
@@ -221,6 +221,9 @@ func (p *namedProcessCollector) Describe(ch chan<- *prometheus.Desc) {
 	ch <- upstreamResponsesDesc
 	ch <- upstreamWeightDesc
 
+	ch <- numprocsDesc
+
+
 }
 
 // Collect implements prometheus.Collector.
@@ -249,18 +252,20 @@ func reflectMetrics(value interface{}, desc *prometheus.Desc, ch chan<- promethe
 		ch <- prometheus.MustNewConstMetric(desc,
 			prometheus.CounterValue, float64(val.Field(i).Interface().(float64)),
 			labels...)
-
 	}
 
 }
 
 func (p *namedProcessCollector) scrape(ch chan<- prometheus.Metric) {
+
 	nginxMetrics, err := getNginxMetrics()
 	if err != nil {
 		glog.Warningf("unexpected error obtaining nginx status info: %v", err)
 		return
 	}
 
+
+
 	reflectMetrics(&nginxMetrics.Connections, connectionsDesc, ch)
 
 	for name, zones := range nginxMetrics.UpstreamZones {

controllers/nginx/pkg/cmd/controller/nginx.go

@@ -52,7 +52,7 @@ const (
 var (
 	tmplPath        = "/etc/nginx/template/nginx.tmpl"
 	cfgPath         = "/etc/nginx/nginx.conf"
-	binary          = "/usr/sbin/nginx"
+	binary          = "/usr/local/bin/nginx"
 	defIngressClass = "nginx"
 )
 

controllers/nginx/pkg/cmd/controller/status.go

@@ -21,8 +21,35 @@ import (
 	"fmt"
 	"io/ioutil"
 	"net/http"
+	"regexp"
+	"strconv"
 )
 
+var (
+	ac      = regexp.MustCompile(`Active connections: (\d+)`)
+	sahr    = regexp.MustCompile(`(\d+)\s(\d+)\s(\d+)`)
+	reading = regexp.MustCompile(`Reading: (\d+)`)
+	writing = regexp.MustCompile(`Writing: (\d+)`)
+	waiting = regexp.MustCompile(`Waiting: (\d+)`)
+)
+
+type nginxStatus struct {
+	// Active total number of active connections
+	Active int
+	// Accepted total number of accepted client connections
+	Accepted int
+	// Handled total number of handled connections. Generally, the parameter value is the same as accepts unless some resource limits have been reached (for example, the worker_connections limit).
+	Handled int
+	// Requests total number of client requests.
+	Requests int
+	// Reading current number of connections where nginx is reading the request header.
+	Reading int
+	// Writing current number of connections where nginx is writing the response back to the client.
+	Writing int
+	// Waiting current number of idle client connections waiting for a request.
+	Waiting int
+}
+
 type Vts struct {
 	NginxVersion  string                    `json:"nginxVersion"`
 	LoadMsec      int                       `json:"loadMsec"`
@@ -110,19 +137,39 @@ func (bit BoolToFloat64) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
-func getNginxMetrics() (*Vts, error) {
-	resp, err := http.DefaultClient.Get(fmt.Sprintf("http://localhost:%v%v", ngxHealthPort, ngxVtsPath))
+func getNginxStatus() (*nginxStatus, error) {
+	data, err := httpBody(fmt.Sprintf("http://localhost:%v%v", ngxHealthPort, ngxStatusPath))
+
 	if err != nil {
 		return nil, fmt.Errorf("unexpected error scraping nginx status page: %v", err)
 	}
 
+	return parse(string(data)), nil
+}
+
+func httpBody(url string) ([]byte, error) {
+	resp, err := http.DefaultClient.Get(url)
+	if err != nil {
+		return nil, fmt.Errorf("unexpected error scraping nginx : %v", err)
+	}
+
 	data, err := ioutil.ReadAll(resp.Body)
 	if err != nil {
-		return nil, fmt.Errorf("unexpected error scraping nginx status page (%v)", err)
+		return nil, fmt.Errorf("unexpected error scraping nginx (%v)", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode < 200 || resp.StatusCode >= 400 {
-		return nil, fmt.Errorf("unexpected error scraping nginx status page (status %v)", resp.StatusCode)
+		return nil, fmt.Errorf("unexpected error scraping nginx (status %v)", resp.StatusCode)
+	}
+
+	return data, nil
+
+}
+func getNginxVtsMetrics() (*Vts, error) {
+	data, err := httpBody(fmt.Sprintf("http://localhost:%v%v", ngxHealthPort, ngxVtsPath))
+
+	if err {
+		return nil, fmt.Errorf("unexpected error scraping nginx vts (%v)", err)
 	}
 
 	var vts Vts
@@ -133,3 +180,34 @@ func getNginxMetrics() (*Vts, error) {
 
 	return &vts, nil
 }
+
+func parse(data string) *nginxStatus {
+	acr := ac.FindStringSubmatch(data)
+	sahrr := sahr.FindStringSubmatch(data)
+	readingr := reading.FindStringSubmatch(data)
+	writingr := writing.FindStringSubmatch(data)
+	waitingr := waiting.FindStringSubmatch(data)
+
+	return &nginxStatus{
+		toInt(acr, 1),
+		toInt(sahrr, 1),
+		toInt(sahrr, 2),
+		toInt(sahrr, 3),
+		toInt(readingr, 1),
+		toInt(writingr, 1),
+		toInt(waitingr, 1),
+	}
+}
+
+func toInt(data []string, pos int) int {
+	if len(data) == 0 {
+		return 0
+	}
+	if pos > len(data) {
+		return 0
+	}
+	if v, err := strconv.Atoi(data[pos]); err == nil {
+		return v
+	}
+	return 0
+}