feat(debug): add some extra debug at level 3

pkg/controllers/proxy/service_endpoints_sync.go

@@ -2,6 +2,7 @@ package proxy
 
 import (
 	"bytes"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"net"
@@ -637,6 +638,8 @@ func (nsc *NetworkServicesController) cleanupStaleIPVSConfig(activeServiceEndpoi
 	// cleanup stale ipvs service and servers
 	klog.V(1).Info("Cleaning up if any, old ipvs service and servers which are no longer needed")
 
+	prettyMap, _ := json.MarshalIndent(activeServiceEndpointMap, "  ", "    ")
+	klog.V(3).Infof("Current active service map:\n%s", prettyMap)
 	var protocol string
 	for _, ipvsSvc := range ipvsSvcs {
 		// Note that this isn't all that safe of an assumption because FWMark services have a completely different
@@ -664,6 +667,7 @@ func (nsc *NetworkServicesController) cleanupStaleIPVSConfig(activeServiceEndpoi
 		// Only delete the service if it's not there anymore to prevent flapping
 		// old: if !ok || len(endpointIDs) == 0 {
 		if !ok {
+			klog.V(3).Infof("didn't find key: %s in above map", key)
 			excluded := false
 			for _, excludedCidr := range nsc.excludedCidrs {
 				if excludedCidr.Contains(ipvsSvc.Address) {

pkg/utils/ipset.go

@@ -561,6 +561,7 @@ func (ipset *IPSet) Save() error {
 // Send formatted ipset.sets into stdin of "ipset restore" command.
 func (ipset *IPSet) Restore() error {
 	restoreString := buildIPSetRestore(ipset)
+	klog.V(3).Infof("ipset restore looks like: %s", restoreString)
 	stdin := bytes.NewBufferString(restoreString)
 	err := ipset.runWithStdin(stdin, "restore", "-exist")
 	if err != nil {