add service traces

pkg/apiserver/servicemesh/tracing/handlers.go

@@ -0,0 +1,43 @@
+package tracing
+
+import (
+	"fmt"
+	"github.com/emicklei/go-restful"
+	"io/ioutil"
+	"log"
+	"net/http"
+)
+
+var JaegerQueryUrl = "http://jaeger-query.istio-system.svc:16686/jaeger"
+
+func GetServiceTracing(request *restful.Request, response *restful.Response) {
+	namespace := request.PathParameter("namespace")
+	service := request.PathParameter("service")
+
+	serviceName := fmt.Sprintf("%s.%s", service, namespace)
+
+	url := fmt.Sprintf("%s/api/traces?%s&service=%s", JaegerQueryUrl, request.Request.URL.RawQuery, serviceName)
+
+	resp, err := http.Get(url)
+
+	if err != nil {
+		log.Printf("query jaeger faile with err %v", err)
+		response.WriteError(http.StatusInternalServerError, err)
+		return
+	}
+
+	body, err := ioutil.ReadAll(resp.Body)
+	defer resp.Body.Close()
+
+	if err != nil {
+		log.Printf("read response error : %v", err)
+		response.WriteError(http.StatusInternalServerError, err)
+		return
+	}
+
+	_, err = response.Write(body)
+
+	if err != nil {
+		log.Printf("write response failed %v", err)
+	}
+}