add klog

Author: Sara Wei

cmd/kperf/commands/runner/runner.go

@@ -2,15 +2,18 @@ package runner
 
 import (
 	"context"
+	"flag"
 	"fmt"
 	"os"
 	"path/filepath"
+	"strconv"
 
 	"github.com/Azure/kperf/api/types"
 	"github.com/Azure/kperf/request"
 
 	"github.com/urfave/cli"
 	"gopkg.in/yaml.v2"
+	"k8s.io/klog/v2"
 )
 
 // Command represents runner subcommand.
@@ -67,8 +70,19 @@ var runCommand = cli.Command{
 			Name:  "result",
 			Usage: "Path to the file which stores results",
 		},
+		cli.IntFlag{
+			Name:  "v",
+			Usage: "log level for V logs",
+			Value: 0,
+		},
 	},
 	Action: func(cliCtx *cli.Context) error {
+		// initialize klog
+		klog.InitFlags(nil)
+		flag.Set("v", strconv.Itoa(cliCtx.Int("v")))
+		defer klog.Flush()
+		flag.Parse()
+
 		profileCfg, err := loadConfig(cliCtx)
 		if err != nil {
 			return err

go.mod

@@ -11,6 +11,7 @@ require (
 	k8s.io/apimachinery v0.28.4
 	k8s.io/cli-runtime v0.28.4
 	k8s.io/client-go v0.28.4
+	k8s.io/klog/v2 v2.100.1
 	k8s.io/kubectl v0.28.4
 )
 
@@ -135,7 +136,6 @@ require (
 	k8s.io/apiextensions-apiserver v0.28.4 // indirect
 	k8s.io/apiserver v0.28.4 // indirect
 	k8s.io/component-base v0.28.4 // indirect
-	k8s.io/klog/v2 v2.100.1 // indirect
 	k8s.io/kube-openapi v0.0.0-20230717233707-2695361300d9 // indirect
 	k8s.io/utils v0.0.0-20230406110748-d93618cff8a2 // indirect
 	oras.land/oras-go v1.2.4 // indirect

request/schedule.go

@@ -12,6 +12,7 @@ import (
 
 	"golang.org/x/time/rate"
 	"k8s.io/client-go/rest"
+	"k8s.io/klog/v2"
 )
 
 const defaultTimeout = 60 * time.Second
@@ -55,7 +56,10 @@ func Schedule(ctx context.Context, spec *types.LoadProfileSpec, restCli []rest.I
 			for builder := range reqBuilderCh {
 				_, req := builder.Build(cli)
 
+				klog.V(9).Infof("Request URL: %s", req.URL())
+
 				if err := limiter.Wait(ctx); err != nil {
+					klog.V(9).Infof("Rate limiter wait failed: %v", err)
 					cancel()
 					return
 				}
@@ -77,6 +81,7 @@ func Schedule(ctx context.Context, spec *types.LoadProfileSpec, restCli []rest.I
 
 					if err != nil {
 						respMetric.ObserveFailure(err)
+						klog.V(9).Infof("Request stream failed: %v", err)
 					}
 				}()
 			}