fix(server): use http as prom server

common/types.go

@@ -18,9 +18,8 @@ import (
 )
 
 const (
-	DtmHttpPort    = 36789
-	DtmGrpcPort    = 36790
-	DtmMetricsPort = 8889
+	DtmHttpPort = 36789
+	DtmGrpcPort = 36790
 )
 
 // MicroService config type for micro service

dtmsvr/api_http.go

@@ -11,6 +11,7 @@ import (
 	"math"
 
 	"github.com/gin-gonic/gin"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/yedf/dtm/common"
 	"github.com/yedf/dtm/dtmcli"
 	"github.com/yedf/dtm/dtmcli/dtmimp"
@@ -26,6 +27,12 @@ func addRoute(engine *gin.Engine) {
 	engine.POST("/api/dtmsvr/registerTccBranch", common.WrapHandler(registerBranch)) // compatible for old sdk
 	engine.GET("/api/dtmsvr/query", common.WrapHandler(query))
 	engine.GET("/api/dtmsvr/all", common.WrapHandler(all))
+
+	// add prometheus exporter
+	h := promhttp.Handler()
+	engine.GET("/api/metrics", func(c *gin.Context) {
+		h.ServeHTTP(c.Writer, c.Request)
+	})
 }
 
 func newGid(c *gin.Context) (interface{}, error) {

dtmsvr/dtmsvr.go

@@ -48,9 +48,6 @@ func StartSvr() {
 	}()
 	go updateBranchAsync()
 
-	// prometheus exporter
-	dtmimp.Logf("prometheus exporter listen at: %d", common.DtmMetricsPort)
-	prometheusHTTPRun(fmt.Sprintf("%d", common.DtmMetricsPort))
 	time.Sleep(100 * time.Millisecond)
 	err = dtmdriver.Use(config.MicroService.Driver)
 	dtmimp.FatalIfError(err)

dtmsvr/metrics.go

@@ -8,13 +8,11 @@ package dtmsvr
 
 import (
 	"context"
-	"net/http"
 	"strings"
 
 	"github.com/gin-gonic/gin"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
-	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"google.golang.org/grpc"
 )
 
@@ -44,13 +42,6 @@ var (
 		[]string{"model", "gid", "branchid", "branchtype", "status"})
 )
 
-func prometheusHTTPRun(port string) {
-	go func() {
-		http.Handle("/api/metrics", promhttp.Handler())
-		http.ListenAndServe(":"+port, nil)
-	}()
-}
-
 func httpMetrics(app *gin.Engine) *gin.Engine {
 	app.Use(func(c *gin.Context) {
 		api := extractFromPath(c.Request.RequestURI)