[GitHub] [incubator-yunikorn-k8shim] yangwwei commented on a change in pull request #88: [YUNIKORN-54] admission-controller should keep generated ID tight

[GitBox <gi...@apache.org>]

yangwwei commented on a change in pull request #88: [YUNIKORN-54] admission-controller should keep generated ID tight
URL: https://github.com/apache/incubator-yunikorn-k8shim/pull/88#discussion_r398630036
 
 

 ##########
 File path: pkg/plugin/admissioncontrollers/webhook/admission_controller.go
 ##########
 @@ -138,25 +138,7 @@ func updateLabels(pod *v1.Pod, patch []patchOperation) []patchOperation {
 
 	if _, ok := existingLabels[common.SparkLabelAppID]; !ok {
 		if _, ok := existingLabels[common.LabelApplicationID]; !ok {
-			// if app id not exist, generate one
-			// the generated ID is using [PodNamespace]_[PodName]_[Timestamp] naming convention.
-			// some admission controllers have strict checks of the length/format of each labels,
-			// this convention keeps the name tidy and short.
-			podNamespace := "default"
-			if pod.Namespace != "" {
-				podNamespace = pod.Namespace
-			}
-
-			// pod's name can be generated, if name is not explicitly specified
-			// look for generateName instead
-			podName := "unknown"
-			if pod.Name != "" {
-				podName = pod.Name
-			} else if pod.GenerateName != "" {
-				podName = pod.GenerateName
-			}
-
-			generatedID := fmt.Sprintf("%s_%s_%d", podNamespace, podName, time.Now().Unix())
+			generatedID := fmt.Sprintf("__app_%d", time.Now().UnixNano())
 
 Review comment:
   One of the main reasons to have this change, not just to keep it < 64 char. Is the fact during the webhook phase, pod namespace, pod name could both be empty (in many cases). My suggestion is to use a general generated ID just with a timestamp, but get more info from attributes https://issues.apache.org/jira/browse/YUNIKORN-55. 

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