Honor stderrthreshold when logtostderr is enabled

cmd/kubevpn/main.go

@@ -1,16 +1,26 @@
 package main
 
 import (
+	"flag"
 	_ "net/http/pprof"
 
 	ctrl "sigs.k8s.io/controller-runtime"
 
 	_ "k8s.io/client-go/plugin/pkg/client/auth"
+	"k8s.io/klog/v2"
 
 	"github.com/wencaiwulue/kubevpn/v2/cmd/kubevpn/cmds"
 )
 
 func main() {
+	// Register klog flags on the standard flag set so that they can be
+	// configured programmatically.  klog v2 defaults -logtostderr to true,
+	// which silently ignores -stderrthreshold.  Opt out of that legacy
+	// behaviour (kubernetes/klog#432) so users can control the threshold.
+	klog.InitFlags(nil)
+	flag.Set("legacy_stderr_threshold_behavior", "false") //nolint:errcheck
+	flag.Set("stderrthreshold", "INFO")                   //nolint:errcheck
+
 	ctx := ctrl.SetupSignalHandler()
 	_ = cmds.NewKubeVPNCommand().ExecuteContext(ctx)
 }

go.mod

@@ -47,6 +47,7 @@ require (
 	golang.org/x/crypto v0.38.0
 	golang.org/x/net v0.40.0
 	golang.org/x/oauth2 v0.28.0
+	golang.org/x/sync v0.14.0
 	golang.org/x/sys v0.35.0
 	golang.org/x/term v0.32.0
 	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2
@@ -61,7 +62,7 @@ require (
 	k8s.io/apimachinery v0.32.3
 	k8s.io/cli-runtime v0.32.3
 	k8s.io/client-go v0.32.3
-	k8s.io/klog/v2 v2.130.1
+	k8s.io/klog/v2 v2.140.0
 	k8s.io/kubectl v0.32.3
 	k8s.io/utils v0.0.0-20250321185631-1f6e0b77f77e
 	sigs.k8s.io/controller-runtime v0.20.4
@@ -259,7 +260,6 @@ require (
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba // indirect
 	golang.org/x/exp v0.0.0-20250207012021-f9890c6ad9f3 // indirect
 	golang.org/x/mod v0.23.0 // indirect
-	golang.org/x/sync v0.14.0 // indirect
 	golang.org/x/text v0.25.0 // indirect
 	golang.org/x/time v0.11.0 // indirect
 	golang.org/x/tools v0.30.0 // indirect

go.sum

@@ -967,8 +967,8 @@ k8s.io/client-go v0.32.3 h1:RKPVltzopkSgHS7aS98QdscAgtgah/+zmpAogooIqVU=
 k8s.io/client-go v0.32.3/go.mod h1:3v0+3k4IcT9bXTc4V2rt+d2ZPPG700Xy6Oi0Gdl2PaY=
 k8s.io/component-base v0.32.3 h1:98WJvvMs3QZ2LYHBzvltFSeJjEx7t5+8s71P7M74u8k=
 k8s.io/component-base v0.32.3/go.mod h1:LWi9cR+yPAv7cu2X9rZanTiFKB2kHA+JjmhkKjCZRpI=
-k8s.io/klog/v2 v2.130.1 h1:n9Xl7H1Xvksem4KFG4PYbdQCQxqc/tTUyrgXaOhHSzk=
-k8s.io/klog/v2 v2.130.1/go.mod h1:3Jpz1GvMt720eyJH1ckRHK1EDfpxISzJ7I9OYgaDtPE=
+k8s.io/klog/v2 v2.140.0 h1:Tf+J3AH7xnUzZyVVXhTgGhEKnFqye14aadWv7bzXdzc=
+k8s.io/klog/v2 v2.140.0/go.mod h1:o+/RWfJ6PwpnFn7OyAG3QnO47BFsymfEfrz6XyYSSp0=
 k8s.io/kube-openapi v0.0.0-20250318190949-c8a335a9a2ff h1:/usPimJzUKKu+m+TE36gUyGcf03XZEP0ZIKgKj35LS4=
 k8s.io/kube-openapi v0.0.0-20250318190949-c8a335a9a2ff/go.mod h1:5jIi+8yX4RIb8wk3XwBo5Pq2ccx4FP10ohkbSKCZoK8=
 k8s.io/kubectl v0.32.3 h1:VMi584rbboso+yjfv0d8uBHwwxbC438LKq+dXd5tOAI=