Warn when missing cloud-provider on kube controller

This commit warns the user / gives better information that when using --cloud-provider="" on kube-controller, that services such as LoadBalancer will not work. However, despite the error, kube-controller will still run as normal. Fixes https://github.com/kubernetes/kubernetes/issues/12716 Fixes https://github.com/kubernetes/kubernetes/issues/11172 Fixes https://github.com/kubernetes/kubernetes/issues/27085

Warn when missing cloud-provider on kube controller
13cecd6e · Charlie Drage · 03be7117 · 13cecd6e
Commit 13cecd6e authored Jul 14, 2016 by Charlie Drage
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servicecontroller.go pkg/controller/service/servicecontroller.go +1 -1

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--- a/pkg/controller/service/servicecontroller.go
+++ b/pkg/controller/service/servicecontroller.go
@@ -160,7 +160,7 @@ func (s *ServiceController) Run(serviceSyncPeriod, nodeSyncPeriod time.Duration)

 func (s *ServiceController) init() error {
 	if s.cloud == nil {
-		return fmt.Errorf("ServiceController should not be run without a cloudprovider.")
+		return fmt.Errorf("WARNING: no cloud provider provided, services of type LoadBalancer will fail.")
 	}

 	balancer, ok := s.cloud.LoadBalancer()