scheduler: add pod Overhead support for requests

Signed-off-by: Eric Ernst <eric.ernst@intel.com>

pkg/scheduler/algorithm/predicates/predicates.go

@@ -726,6 +726,9 @@ func (c *VolumeZoneChecker) predicate(pod *v1.Pod, meta PredicateMetadata, nodeI
 // the max in each dimension iteratively. In contrast, we sum the resource vectors for
 // regular containers since they run simultaneously.
 //
+// If Pod Overhead is specified and the feature gate is set, the resources defined for Overhead
+// are added to the calculated Resource request sum
+//
 // Example:
 //
 // Pod:
@@ -756,6 +759,11 @@ func GetResourceRequest(pod *v1.Pod) *schedulernodeinfo.Resource {
 		result.SetMaxResource(container.Resources.Requests)
 	}
 
+	// If Overhead is being utilized, add to the total requests for the pod
+	if pod.Spec.Overhead != nil && utilfeature.DefaultFeatureGate.Enabled(features.PodOverhead) {
+		result.Add(pod.Spec.Overhead)
+	}
+
 	return result
 }