Merge pull request #45930 from x1957/addlog

Automatic merge from submit-queue (batch tested with PRs 46801, 45184, 45930, 46192, 45563) adds log when --kubeconfig with wrong config **What this PR does / why we need it**: easy for troubleshooting I have set --kubeconfig==/etc/kubernetes/kubelet.conf when copy & paste(the file path is wrong “==/etc/kubernetes/kubelet.conf”), but kubelet start with no error log. I don't know what happend. **Release note**: ```release-note NONE ```

Merge pull request #45930 from x1957/addlog
f294b535 · Kubernetes Submit Queue · GitHub · caead741 · 10eecc77 · f294b535
Commit f294b535 authored Jun 02, 2017 by Kubernetes Submit Queue Committed by GitHub Jun 02, 2017
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server.go cmd/kubelet/app/server.go +2 -0

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--- a/cmd/kubelet/app/server.go
+++ b/cmd/kubelet/app/server.go
@@ -466,6 +466,8 @@ func run(s *options.KubeletServer, kubeDeps *kubelet.KubeletDeps) (err error) {
 		} else {
 			if s.RequireKubeConfig {
 				return fmt.Errorf("invalid kubeconfig: %v", err)
+			} else if s.KubeConfig.Provided() && !standaloneMode {
+				glog.Warningf("Invalid kubeconfig: %v", err)
 			}
 			if standaloneMode {
 				glog.Warningf("No API client: %v", err)