From 1088d9ef0963edae1a5c8e031c1b54be3cad1691 Mon Sep 17 00:00:00 2001
From: David Eads <deads@redhat.com>
Date: Wed, 23 May 2018 15:00:37 -0400
Subject: [PATCH] prevent zero for leader election timeouts

Kubernetes-commit: 7288e8828f5bf659d41e71760f9d9923e405e2e4
---
 tools/leaderelection/leaderelection.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/leaderelection/leaderelection.go b/tools/leaderelection/leaderelection.go
index e41b420c..aed55574 100644
--- a/tools/leaderelection/leaderelection.go
+++ b/tools/leaderelection/leaderelection.go
@@ -74,6 +74,16 @@ func NewLeaderElector(lec LeaderElectionConfig) (*LeaderElector, error) {
 	if lec.RenewDeadline <= time.Duration(JitterFactor*float64(lec.RetryPeriod)) {
 		return nil, fmt.Errorf("renewDeadline must be greater than retryPeriod*JitterFactor")
 	}
+	if lec.LeaseDuration < 1 {
+		return nil, fmt.Errorf("leaseDuration must be greater than zero")
+	}
+	if lec.RenewDeadline < 1 {
+		return nil, fmt.Errorf("renewDeadline must be greater than zero")
+	}
+	if lec.RetryPeriod < 1 {
+		return nil, fmt.Errorf("retryPeriod must be greater than zero")
+	}
+
 	if lec.Lock == nil {
 		return nil, fmt.Errorf("Lock must not be nil.")
 	}