From 1ff0856e8168e1720623f0365048451bb5c73144 Mon Sep 17 00:00:00 2001
From: Ted Yu <yuzhihong@gmail.com>
Date: Fri, 3 Apr 2020 16:47:19 -0700
Subject: [PATCH] Check Annotations map against nil for ConfigMapLock#Update()

Signed-off-by: Ted Yu <yuzhihong@gmail.com>

Kubernetes-commit: 086d6ae9bbbe95e0740e7dd44fa08c31409f8bec
---
 tools/leaderelection/resourcelock/configmaplock.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/leaderelection/resourcelock/configmaplock.go b/tools/leaderelection/resourcelock/configmaplock.go
index 608f7524..6390b4ef 100644
--- a/tools/leaderelection/resourcelock/configmaplock.go
+++ b/tools/leaderelection/resourcelock/configmaplock.go
@@ -88,6 +88,9 @@ func (cml *ConfigMapLock) Update(ctx context.Context, ler LeaderElectionRecord)
 	if err != nil {
 		return err
 	}
+	if cml.cm.Annotations == nil {
+		cml.cm.Annotations = make(map[string]string)
+	}
 	cml.cm.Annotations[LeaderElectionRecordAnnotationKey] = string(recordBytes)
 	cml.cm, err = cml.Client.ConfigMaps(cml.ConfigMapMeta.Namespace).Update(ctx, cml.cm, metav1.UpdateOptions{})
 	return err