Support extended pod logging options

Increase the supported controls on pod logging. Add validaiton to pod
log options. Ensure the Kubelet is using a consistent, structured way to
process pod log arguments.

Add ?sinceSeconds=<durationInSeconds>, &sinceTime=<RFC3339>, ?timestamps=<bool>,
?tailLines=<number>, and ?limitBytes=<number>

docs/user-guide/kubectl/kubectl_logs.md

@@ -47,14 +47,20 @@ kubectl logs [-f] [-p] POD [-c CONTAINER]
 ### Examples
 
 ```
-# Return snapshot of ruby-container logs from pod 123456-7890.
-$ kubectl logs 123456-7890 ruby-container
+# Return snapshot logs from pod nginx with only one container
+$ kubectl logs nginx
 
-# Return snapshot of previous terminated ruby-container logs from pod 123456-7890.
-$ kubectl logs -p 123456-7890 ruby-container
+# Return snapshot of previous terminated ruby container logs from pod web-1
+$ kubectl logs -p -c ruby web-1
 
-# Start streaming of ruby-container logs from pod 123456-7890.
-$ kubectl logs -f 123456-7890 ruby-container
+# Begin streaming the logs of the ruby container in pod web-1
+$ kubectl logs -f -c ruby web-1
+
+# Display only the most recent 20 lines of output in pod nginx
+$ kubectl logs --tail=20 nginx
+
+# Show all logs from pod nginx written in the last hour
+$ kubectl logs --since=1h nginx
 ```
 
 ### Options
@@ -63,7 +69,12 @@ $ kubectl logs -f 123456-7890 ruby-container
   -c, --container="": Container name
   -f, --follow[=false]: Specify if the logs should be streamed.
       --interactive[=true]: If true, prompt the user for input when required. Default true.
+      --limit-bytes=0: Maximum bytes of logs to return. Defaults to no limit.
   -p, --previous[=false]: If true, print the logs for the previous instance of the container in a pod if it exists.
+      --since=0: Only return logs newer than a relative duration like 5s, 2m, or 3h. Defaults to all logs. Only one of since-time / since may be used.
+      --since-time="": Only return logs after a specific date (RFC3339). Defaults to all logs. Only one of since-time / since may be used.
+      --tail=-1: Lines of recent log file to display. Defaults to -1, showing all log lines.
+      --timestamps[=false]: Include timestamps on each line in the log output
 ```
 
 ### Options inherited from parent commands
@@ -98,7 +109,7 @@ $ kubectl logs -f 123456-7890 ruby-container
 
 * [kubectl](kubectl.md)	 - kubectl controls the Kubernetes cluster manager
 
-###### Auto generated by spf13/cobra at 2015-09-10 18:53:03.154570214 +0000 UTC
+###### Auto generated by spf13/cobra at 2015-09-16 18:54:52.319210951 +0000 UTC
 
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