From 7f172286342c4238d4b636c113d35835ff9299ee Mon Sep 17 00:00:00 2001
From: David Eads <deads@redhat.com>
Date: Tue, 16 Jun 2020 10:43:52 -0400
Subject: [PATCH] prevent panic in azure cloud provider from killing the
 process

---
 .../k8s.io/legacy-cloud-providers/azure/azure_routes.go   | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/staging/src/k8s.io/legacy-cloud-providers/azure/azure_routes.go b/staging/src/k8s.io/legacy-cloud-providers/azure/azure_routes.go
index a698db61235..d6797b28088 100644
--- a/staging/src/k8s.io/legacy-cloud-providers/azure/azure_routes.go
+++ b/staging/src/k8s.io/legacy-cloud-providers/azure/azure_routes.go
@@ -29,6 +29,7 @@ import (
 	"github.com/Azure/go-autorest/autorest/to"
 
 	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/apimachinery/pkg/util/wait"
 	cloudprovider "k8s.io/cloud-provider"
 	"k8s.io/klog/v2"
 	azcache "k8s.io/legacy-cloud-providers/azure/cache"
@@ -90,9 +91,12 @@ func newDelayedRouteUpdater(az *Cloud, interval time.Duration) *delayedRouteUpda
 
 // run starts the updater reconciling loop.
 func (d *delayedRouteUpdater) run() {
-	for {
+	err := wait.PollImmediateInfinite(d.interval, func() (bool, error) {
 		d.updateRoutes()
-		time.Sleep(d.interval)
+		return false, nil
+	})
+	if err != nil { // this should never happen, if it does, panic
+		panic(err)
 	}
 }