dedupe pod resource request calculation

pkg/scheduler/framework/plugins/noderesources/fit.go

@@ -24,6 +24,8 @@ import (
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/util/sets"
+
+	"k8s.io/kubernetes/pkg/api/v1/resource"
 	v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
 	"k8s.io/kubernetes/pkg/scheduler/apis/config"
 	"k8s.io/kubernetes/pkg/scheduler/apis/config/validation"
@@ -160,20 +162,10 @@ func NewFit(plArgs runtime.Object, h framework.Handle, fts feature.Features) (fr
 //
 // Result: CPU: 3, Memory: 3G
 func computePodResourceRequest(pod *v1.Pod) *preFilterState {
+	// pod hasn't scheduled yet so we don't need to worry about InPlacePodVerticalScalingEnabled
+	reqs := resource.PodRequests(pod, resource.PodResourcesOptions{})
 	result := &preFilterState{}
-	for _, container := range pod.Spec.Containers {
-		result.Add(container.Resources.Requests)
-	}
-
-	// take max_resource(sum_pod, any_init_container)
-	for _, container := range pod.Spec.InitContainers {
-		result.SetMaxResource(container.Resources.Requests)
-	}
-
-	// If Overhead is being utilized, add to the total requests for the pod
-	if pod.Spec.Overhead != nil {
-		result.Add(pod.Spec.Overhead)
-	}
+	result.SetMaxResource(reqs)
 	return result
 }