propagate log level into kube-router

Init klog v2 with the same V level set for logrus so that the verbosity level is correct in kube-router.

Signed-off-by: Thomas Ferrandiz <[email protected]>

go.mod

@@ -156,6 +156,7 @@ require (
 	k8s.io/component-helpers v0.26.4
 	k8s.io/cri-api v0.26.4
 	k8s.io/klog v1.0.0
+	k8s.io/klog/v2 v2.80.1
 	k8s.io/kubectl v0.25.0
 	k8s.io/kubernetes v1.26.4
 	k8s.io/utils v0.0.0-20221107191617-1a15be271d1d
@@ -385,7 +386,6 @@ require (
 	k8s.io/csi-translation-lib v0.0.0 // indirect
 	k8s.io/dynamic-resource-allocation v0.0.0 // indirect
 	k8s.io/gengo v0.0.0-20220902162205-c0856e24416d // indirect
-	k8s.io/klog/v2 v2.80.1 // indirect
 	k8s.io/kms v0.0.0 // indirect
 	k8s.io/kube-aggregator v0.25.4 // indirect
 	k8s.io/kube-controller-manager v0.0.0 // indirect

pkg/agent/netpol/netpol.go

@@ -8,7 +8,9 @@ package netpol
 
 import (
 	"context"
+	"flag"
 	"runtime"
+	"strconv"
 	"strings"
 	"sync"
 
@@ -19,13 +21,15 @@ import (
 	"github.com/cloudnativelabs/kube-router/v2/pkg/options"
 	"github.com/cloudnativelabs/kube-router/v2/pkg/utils"
 	"github.com/coreos/go-iptables/iptables"
+	"github.com/k3s-io/k3s/pkg/cli/cmds"
 	"github.com/k3s-io/k3s/pkg/daemons/config"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	v1core "k8s.io/api/core/v1"
 	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/clientcmd"
+	"k8s.io/klog/v2"
 )
 
 // Run creates and starts a new instance of the kube-router network policy controller
@@ -126,6 +130,10 @@ func Run(ctx context.Context, nodeConfig *config.Node) error {
 	wg.Add(1)
 	go hc.RunCheck(healthCh, stopCh, &wg)
 
+	//init klog v2 which is used by kube-router
+	klog.InitFlags(nil)
+	flag.Set("v", strconv.Itoa(cmds.LogConfig.VLevel))
+
 	npc, err := netpol.NewNetworkPolicyController(client, krConfig, podInformer, npInformer, nsInformer, &sync.Mutex{},
 		iptablesCmdHandlers, ipSetHandlers)
 	if err != nil {