Move glog/klog logging to klog/v2

cmd/healthchecker/health_checker.go

@@ -23,18 +23,21 @@ import (
 
 	"github.com/spf13/pflag"
 
+	"k8s.io/klog/v2"
 	"k8s.io/node-problem-detector/cmd/healthchecker/options"
 	"k8s.io/node-problem-detector/pkg/custompluginmonitor/types"
 	"k8s.io/node-problem-detector/pkg/healthchecker"
 )
 
 func main() {
-	// Set glog flag so that it does not log to files.
+	// Set klog flag so that it does not log to files.
+	klog.InitFlags(nil)
 	if err := flag.Set("logtostderr", "true"); err != nil {
 		fmt.Printf("Failed to set logtostderr=true: %v", err)
 		os.Exit(int(types.Unknown))
 	}
 
+
 	hco := options.NewHealthCheckerOptions()
 	hco.AddFlags(pflag.CommandLine)
 	pflag.Parse()

cmd/logcounter/log_counter.go

@@ -26,13 +26,16 @@ import (
 
 	"github.com/spf13/pflag"
 
+	"k8s.io/klog/v2"
 	"k8s.io/node-problem-detector/cmd/logcounter/options"
 	"k8s.io/node-problem-detector/pkg/custompluginmonitor/types"
 	"k8s.io/node-problem-detector/pkg/logcounter"
 )
 
 func main() {
-	// Set glog flag so that it does not log to files.
+	// Set klog flag so that it does not log to files.
+	klog.InitFlags(nil)
+
 	if err := flag.Set("logtostderr", "true"); err != nil {
 		fmt.Printf("Failed to set logtostderr=true: %v", err)
 		os.Exit(int(types.Unknown))

cmd/nodeproblemdetector/node_problem_detector.go

@@ -19,7 +19,7 @@ package main
 import (
 	"context"
 
-	"github.com/golang/glog"
+	"k8s.io/klog/v2"
 
 	_ "k8s.io/node-problem-detector/cmd/nodeproblemdetector/exporterplugins"
 	_ "k8s.io/node-problem-detector/cmd/nodeproblemdetector/problemdaemonplugins"
@@ -46,18 +46,18 @@ func npdMain(ctx context.Context, npdo *options.NodeProblemDetectorOptions) erro
 	// Initialize problem daemons.
 	problemDaemons := problemdaemon.NewProblemDaemons(npdo.MonitorConfigPaths)
 	if len(problemDaemons) == 0 {
-		glog.Fatalf("No problem daemon is configured")
+		klog.Fatalf("No problem daemon is configured")
 	}
 
 	// Initialize exporters.
 	defaultExporters := []types.Exporter{}
 	if ke := k8sexporter.NewExporterOrDie(ctx, npdo); ke != nil {
 		defaultExporters = append(defaultExporters, ke)
-		glog.Info("K8s exporter started.")
+		klog.Info("K8s exporter started.")
 	}
 	if pe := prometheusexporter.NewExporterOrDie(npdo); pe != nil {
 		defaultExporters = append(defaultExporters, pe)
-		glog.Info("Prometheus exporter started.")
+		klog.Info("Prometheus exporter started.")
 	}
 
 	plugableExporters := exporters.NewExporters()
@@ -67,7 +67,7 @@ func npdMain(ctx context.Context, npdo *options.NodeProblemDetectorOptions) erro
 	npdExporters = append(npdExporters, plugableExporters...)
 
 	if len(npdExporters) == 0 {
-		glog.Fatalf("No exporter is successfully setup")
+		klog.Fatalf("No exporter is successfully setup")
 	}
 
 	// Initialize NPD core.

cmd/nodeproblemdetector/node_problem_detector_linux.go

@@ -19,8 +19,8 @@ package main
 import (
 	"context"
 
-	"github.com/golang/glog"
 	"github.com/spf13/pflag"
+	"k8s.io/klog/v2"
 	"k8s.io/node-problem-detector/cmd/options"
 )
 
@@ -30,6 +30,6 @@ func main() {
 
 	pflag.Parse()
 	if err := npdMain(context.Background(), npdo); err != nil {
-		glog.Fatalf("Problem detector failed with error: %v", err)
+		klog.Fatalf("Problem detector failed with error: %v", err)
 	}
 }

cmd/nodeproblemdetector/node_problem_detector_windows.go

@@ -22,11 +22,11 @@ import (
 	"sync"
 	"time"
 
-	"github.com/golang/glog"
 	"github.com/spf13/pflag"
 	"golang.org/x/sys/windows/svc"
 	"golang.org/x/sys/windows/svc/debug"
 	"golang.org/x/sys/windows/svc/eventlog"
+	"k8s.io/klog/v2"
 	"k8s.io/node-problem-detector/cmd/options"
 )
 
@@ -62,7 +62,7 @@ func main() {
 func isRunningAsWindowsService() bool {
 	runningAsService, err := svc.IsWindowsService()
 	if err != nil {
-		glog.Errorf("cannot determine if running as Windows Service assuming standalone, %v", err)
+		klog.Errorf("cannot determine if running as Windows Service assuming standalone, %v", err)
 		return false
 	}
 	return runningAsService

cmd/nodeproblemdetector/node_problem_detector_windows_test.go

@@ -20,7 +20,6 @@ limitations under the License.
 package main
 
 import (
-	"context"
 	"testing"
 
 	"golang.org/x/sys/windows/svc"