Merge pull request #58735 from liggitt/server-unavailable-errors

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Distinguish service unavailable errors in client-go related to https://github.com/kubernetes/kubernetes/issues/58642 the server is returning correct errors, but the client was not distinguishing service unavailable errors from general 5xx errors ```release-note NONE ```

Merge pull request #58735 from liggitt/server-unavailable-errors
068e1642 · Kubernetes Submit Queue · GitHub · 7de1a8e0 · ca2eba70 · 068e1642
Unverified Commit 068e1642 authored Jan 25, 2018 by Kubernetes Submit Queue Committed by GitHub Jan 25, 2018
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errors.go staging/src/k8s.io/apimachinery/pkg/api/errors/errors.go +3 -0

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--- a/staging/src/k8s.io/apimachinery/pkg/api/errors/errors.go
+++ b/staging/src/k8s.io/apimachinery/pkg/api/errors/errors.go
@@ -366,6 +366,9 @@ func NewGenericServerResponse(code int, verb string, qualifiedResource schema.Gr
 	case http.StatusUnprocessableEntity:
 		reason = metav1.StatusReasonInvalid
 		message = "the server rejected our request due to an error in our request"
+	case http.StatusServiceUnavailable:
+		reason = metav1.StatusReasonServiceUnavailable
+		message = "the server is currently unable to handle the request"
 	case http.StatusGatewayTimeout:
 		reason = metav1.StatusReasonTimeout
 		message = "the server was unable to return a response in the time allotted, but may still be processing the request"