Move resource.Quantity rounding to defaulter

This reverts commit feb56cc486.

pkg/api/v1/conversion.go

@@ -739,15 +739,15 @@ func Convert_v1_ResourceList_To_api_ResourceList(in *ResourceList, out *api.Reso
 	if *in == nil {
 		return nil
 	}
-
 	if *out == nil {
 		*out = make(api.ResourceList, len(*in))
 	}
 	for key, val := range *in {
+		// Moved to defaults
 		// TODO(#18538): We round up resource values to milli scale to maintain API compatibility.
 		// In the future, we should instead reject values that need rounding.
-		const milliScale = -3
+		// const milliScale = -3
-		val.RoundUp(milliScale)
+		// val.RoundUp(milliScale)
 
 		(*out)[api.ResourceName(key)] = val
 	}

pkg/api/v1/defaults.go

@@ -52,9 +52,21 @@ func addDefaultingFuncs(scheme *runtime.Scheme) error {
 		SetDefaults_LimitRangeItem,
 		SetDefaults_ConfigMap,
 		SetDefaults_RBDVolumeSource,
+		SetDefaults_ResourceList,
 	)
 }
 
+func SetDefaults_ResourceList(obj *ResourceList) {
+	for key, val := range *obj {
+		// TODO(#18538): We round up resource values to milli scale to maintain API compatibility.
+		// In the future, we should instead reject values that need rounding.
+		const milliScale = -3
+		val.RoundUp(milliScale)
+
+		(*obj)[ResourceName(key)] = val
+	}
+}
+
 func SetDefaults_PodExecOptions(obj *PodExecOptions) {
 	obj.Stdout = true
 	obj.Stderr = true

pkg/api/v1/defaults_test.go

@@ -574,6 +574,31 @@ func TestSetDefaultObjectFieldSelectorAPIVersion(t *testing.T) {
 	}
 }
 
+func TestSetMinimumScalePod(t *testing.T) {
+	// verify we default if limits are specified (and that request=0 is preserved)
+	s := versioned.PodSpec{}
+	s.Containers = []versioned.Container{
+		{
+			Resources: versioned.ResourceRequirements{
+				Requests: versioned.ResourceList{
+					versioned.ResourceMemory: resource.MustParse("1n"),
+				},
+				Limits: versioned.ResourceList{
+					versioned.ResourceCPU: resource.MustParse("2n"),
+				},
+			},
+		},
+	}
+	pod := &versioned.Pod{
+		Spec: s,
+	}
+	versioned.SetObjectDefaults_Pod(pod)
+
+	if expect := resource.MustParse("1m"); expect.Cmp(pod.Spec.Containers[0].Resources.Requests[versioned.ResourceMemory]) != 0 {
+		t.Errorf("did not round resources: %#v", pod.Spec.Containers[0].Resources)
+	}
+}
+
 func TestSetDefaultRequestsPod(t *testing.T) {
 	// verify we default if limits are specified (and that request=0 is preserved)
 	s := versioned.PodSpec{}