Merge pull request #24645 from jlowdermilk/rolling-update

Automatic merge from submit-queue

kubectl rolling-update support for same image

Fixes #23497.

Enables `kubectl rolling-update --image` to the same image, adding a `--image-pull-policy` flag to remove ambiguity. This allows rolling-update to behave as an "update and/or restart" (https://github.com/kubernetes/kubernetes/issues/23497#issuecomment-212349730), or as a forced update when the same tag can mean multiple versions (e.g. `:latest`). cc @janetkuo @nikhiljindal

docs/user-guide/kubectl/kubectl_rolling-update.md

@@ -78,6 +78,7 @@ kubectl rolling-update frontend-v1 frontend-v2 --rollback
       --dry-run[=false]: If true, print out the changes that would be made, but don't actually make them.
   -f, --filename=[]: Filename or URL to file to use to create the new replication controller.
       --image="": Image to use for upgrading the replication controller. Must be distinct from the existing image (either new image or new image tag).  Can not be used with --filename/-f
+      --image-pull-policy="": Explicit policy for when to pull container images. Required when --image is same as existing image, ignored otherwise.
       --include-extended-apis[=true]: If true, include definitions of new APIs via calls to the API server. [default true]
       --no-headers[=false]: When using the default output, don't print headers.
   -o, --output="": Output format. One of: json|yaml|wide|name|go-template=...|go-template-file=...|jsonpath=...|jsonpath-file=... See golang template [http://golang.org/pkg/text/template/#pkg-overview] and jsonpath template [http://releases.k8s.io/HEAD/docs/user-guide/jsonpath.md].
@@ -126,7 +127,7 @@ kubectl rolling-update frontend-v1 frontend-v2 --rollback
 
 * [kubectl](kubectl.md)	 - kubectl controls the Kubernetes cluster manager
 
-###### Auto generated by spf13/cobra on 5-Apr-2016
+###### Auto generated by spf13/cobra on 21-Apr-2016
 
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