Merge pull request #12326 from feihujiang/kubectlLabelAcceptFileNameParam

Kubectl label command accepts a filename param

docs/user-guide/kubectl/kubectl_label.md

@@ -45,7 +45,7 @@ If --overwrite is true, then existing labels can be overwritten, otherwise attem
 If --resource-version is specified, then updates will use this resource version, otherwise the existing resource-version will be used.
 
 ```
-kubectl label [--overwrite] TYPE NAME KEY_1=VAL_1 ... KEY_N=VAL_N [--resource-version=version]
+kubectl label [--overwrite] (-f FILENAME | TYPE NAME) KEY_1=VAL_1 ... KEY_N=VAL_N [--resource-version=version]
 ```
 
 ### Examples
@@ -60,6 +60,9 @@ $ kubectl label --overwrite pods foo status=unhealthy
 # Update all pods in the namespace
 $ kubectl label pods --all status=unhealthy
 
+# Update a pod identified by the type and name in "pod.json"
+$ kubectl label -f pod.json status=unhealthy
+
 # Update pod 'foo' only if the resource is unchanged from version 1.
 $ kubectl label pods foo status=unhealthy --resource-version=1
 
@@ -72,6 +75,7 @@ $ kubectl label pods foo bar-
 
 ```
       --all[=false]: select all resources in the namespace of the specified resource types
+  -f, --filename=[]: Filename, directory, or URL to a file identifying the resource to update the labels
   -h, --help[=false]: help for label
       --no-headers[=false]: When using the default output, don't print headers.
   -o, --output="": Output format. One of: json|yaml|template|templatefile|wide.
@@ -116,7 +120,7 @@ $ kubectl label pods foo bar-
 
 * [kubectl](kubectl.md)	 - kubectl controls the Kubernetes cluster manager
 
-###### Auto generated by spf13/cobra at 2015-08-12 23:41:01.309176995 +0000 UTC
+###### Auto generated by spf13/cobra at 2015-08-13 02:21:16.349210188 +0000 UTC
 
 <!-- BEGIN MUNGE: GENERATED_ANALYTICS -->
 [![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/docs/user-guide/kubectl/kubectl_label.md?pixel)]()