1. update clientset, deepcopy using code-generator

2. add a dummy file tools.go to force "go mod vendor" to see
code-generator as dependencies
3. add a script to update CRD
4. add a README to document CRD updating steps
run go mod tidy
update README

vendor/k8s.io/client-go/tools/leaderelection/leaderelection.go

@@ -53,9 +53,9 @@ limitations under the License.
 package leaderelection
 
 import (
+	"bytes"
 	"context"
 	"fmt"
-	"reflect"
 	"time"
 
 	"k8s.io/apimachinery/pkg/api/errors"
@@ -176,8 +176,9 @@ type LeaderCallbacks struct {
 type LeaderElector struct {
 	config LeaderElectionConfig
 	// internal bookkeeping
-	observedRecord rl.LeaderElectionRecord
-	observedTime   time.Time
+	observedRecord    rl.LeaderElectionRecord
+	observedRawRecord []byte
+	observedTime      time.Time
 	// used to implement OnNewLeader(), may lag slightly from the
 	// value observedRecord.HolderIdentity if the transition has
 	// not yet been reported.
@@ -324,7 +325,7 @@ func (le *LeaderElector) tryAcquireOrRenew() bool {
 	}
 
 	// 1. obtain or create the ElectionRecord
-	oldLeaderElectionRecord, err := le.config.Lock.Get()
+	oldLeaderElectionRecord, oldLeaderElectionRawRecord, err := le.config.Lock.Get()
 	if err != nil {
 		if !errors.IsNotFound(err) {
 			klog.Errorf("error retrieving resource lock %v: %v", le.config.Lock.Describe(), err)
@@ -340,8 +341,9 @@ func (le *LeaderElector) tryAcquireOrRenew() bool {
 	}
 
 	// 2. Record obtained, check the Identity & Time
-	if !reflect.DeepEqual(le.observedRecord, *oldLeaderElectionRecord) {
+	if !bytes.Equal(le.observedRawRecord, oldLeaderElectionRawRecord) {
 		le.observedRecord = *oldLeaderElectionRecord
+		le.observedRawRecord = oldLeaderElectionRawRecord
 		le.observedTime = le.clock.Now()
 	}
 	if len(oldLeaderElectionRecord.HolderIdentity) > 0 &&
@@ -365,6 +367,7 @@ func (le *LeaderElector) tryAcquireOrRenew() bool {
 		klog.Errorf("Failed to update lock: %v", err)
 		return false
 	}
+
 	le.observedRecord = leaderElectionRecord
 	le.observedTime = le.clock.Now()
 	return true