migrate leader election to lease API

Change-Id: I21fd5cdc1af59e456628cf15fc84b2d79db2eda0

Kubernetes-commit: 447295aff2bd8cdc92a2376553d83546a4d6eb41

tools/leaderelection/resourcelock/leaselock.go

@@ -17,6 +17,7 @@ limitations under the License.
 package resourcelock
 
 import (
+	"encoding/json"
 	"errors"
 	"fmt"
 
@@ -36,13 +37,18 @@ type LeaseLock struct {
 }
 
 // Get returns the election record from a Lease spec
-func (ll *LeaseLock) Get() (*LeaderElectionRecord, error) {
+func (ll *LeaseLock) Get() (*LeaderElectionRecord, []byte, error) {
 	var err error
 	ll.lease, err = ll.Client.Leases(ll.LeaseMeta.Namespace).Get(ll.LeaseMeta.Name, metav1.GetOptions{})
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
-	return LeaseSpecToLeaderElectionRecord(&ll.lease.Spec), nil
+	record := LeaseSpecToLeaderElectionRecord(&ll.lease.Spec)
+	recordByte, err := json.Marshal(*record)
+	if err != nil {
+		return nil, nil, err
+	}
+	return record, recordByte, nil
 }
 
 // Create attempts to create a Lease
@@ -84,7 +90,7 @@ func (ll *LeaseLock) Describe() string {
 	return fmt.Sprintf("%v/%v", ll.LeaseMeta.Namespace, ll.LeaseMeta.Name)
 }
 
-// returns the Identity of the lock
+// Identity returns the Identity of the lock
 func (ll *LeaseLock) Identity() string {
 	return ll.LockConfig.Identity
 }