Merge pull request kubernetes-csi#1318 from huww98/json-log

Support json logging format

cmd/csi-provisioner/csi-provisioner.go

@@ -49,6 +49,10 @@ import (
 	"k8s.io/client-go/tools/clientcmd"
 	"k8s.io/client-go/util/workqueue"
 	utilflag "k8s.io/component-base/cli/flag"
+	"k8s.io/component-base/featuregate"
+	"k8s.io/component-base/logs"
+	logsapi "k8s.io/component-base/logs/api/v1"
+	_ "k8s.io/component-base/logs/json/register"
 	"k8s.io/component-base/metrics/legacyregistry"
 	_ "k8s.io/component-base/metrics/prometheus/clientgo/leaderelection" // register leader election in the default legacy registry
 	_ "k8s.io/component-base/metrics/prometheus/workqueue"               // register work queues in the default legacy registry
@@ -132,10 +136,17 @@ func main() {
 	flag.Var(utilflag.NewMapStringBool(&featureGates), "feature-gates", "A set of key=value pairs that describe feature gates for alpha/experimental features. "+
 		"Options are:\n"+strings.Join(utilfeature.DefaultFeatureGate.KnownFeatures(), "\n"))
 
-	klog.InitFlags(nil)
+	fg := featuregate.NewFeatureGate()
+	logsapi.AddFeatureGates(fg)
+	c := logsapi.NewLoggingConfiguration()
+	logsapi.AddFlags(c, flag.CommandLine)
+	logs.InitLogs()
 	flag.CommandLine.AddGoFlagSet(goflag.CommandLine)
-	flag.Set("logtostderr", "true")
 	flag.Parse()
+	if err := logsapi.ValidateAndApply(c, fg); err != nil {
+		klog.ErrorS(err, "LoggingConfiguration is invalid")
+		klog.FlushAndExit(klog.ExitFlushTimeout, 1)
+	}
 
 	ctx := context.Background()
 
@@ -152,7 +163,7 @@ func main() {
 		fmt.Println(os.Args[0], version)
 		os.Exit(0)
 	}
-	klog.Infof("Version: %s", version)
+	klog.InfoS("Version", "version", version)
 
 	if *metricsAddress != "" && *httpEndpoint != "" {
 		klog.Error("only one of `--metrics-address` and `--http-endpoint` can be set.")

go.mod

@@ -65,6 +65,7 @@ require (
 	github.com/fsnotify/fsnotify v1.8.0 // indirect
 	github.com/fxamacker/cbor/v2 v2.7.0 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/go-logr/zapr v1.3.0 // indirect
 	github.com/go-openapi/jsonpointer v0.21.0 // indirect
 	github.com/go-openapi/jsonreference v0.21.0 // indirect
 	github.com/go-openapi/swag v0.23.0 // indirect