pod-overhead: add Overhead to RuntimeClass internal type

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

pkg/apis/node/validation/validation_test.go

@@ -19,8 +19,13 @@ package validation
 import (
 	"testing"
 
+	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	featuregatetesting "k8s.io/component-base/featuregate/testing"
+	"k8s.io/kubernetes/pkg/apis/core"
 	"k8s.io/kubernetes/pkg/apis/node"
+	"k8s.io/kubernetes/pkg/features"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -126,3 +131,58 @@ func TestValidateRuntimeUpdate(t *testing.T) {
 		})
 	}
 }
+
+func TestValidateOverhead(t *testing.T) {
+
+	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.PodOverhead, true)()
+
+	successCase := []struct {
+		Name     string
+		overhead *node.Overhead
+	}{
+		{
+			Name: "Overhead with valid cpu and memory resources",
+			overhead: &node.Overhead{
+				PodFixed: core.ResourceList{
+					core.ResourceName(core.ResourceCPU):    resource.MustParse("10"),
+					core.ResourceName(core.ResourceMemory): resource.MustParse("10G"),
+				},
+			},
+		},
+	}
+
+	for _, tc := range successCase {
+		rc := &node.RuntimeClass{
+			ObjectMeta: metav1.ObjectMeta{Name: "foo"},
+			Handler:    "bar",
+			Overhead:   tc.overhead,
+		}
+		if errs := ValidateRuntimeClass(rc); len(errs) != 0 {
+			t.Errorf("%q unexpected error: %v", tc.Name, errs)
+		}
+	}
+
+	errorCase := []struct {
+		Name     string
+		overhead *node.Overhead
+	}{
+		{
+			Name: "Invalid Resources",
+			overhead: &node.Overhead{
+				PodFixed: core.ResourceList{
+					core.ResourceName("my.org"): resource.MustParse("10m"),
+				},
+			},
+		},
+	}
+	for _, tc := range errorCase {
+		rc := &node.RuntimeClass{
+			ObjectMeta: metav1.ObjectMeta{Name: "foo"},
+			Handler:    "bar",
+			Overhead:   tc.overhead,
+		}
+		if errs := ValidateRuntimeClass(rc); len(errs) == 0 {
+			t.Errorf("%q expected error", tc.Name)
+		}
+	}
+}