Merge pull request #13309 from kubernetes/revert-13246-revert-12492-limit_range_api

api/swagger-spec/v1.json

@@ -11575,7 +11575,15 @@
      },
      "default": {
       "type": "any",
-      "description": "Default usage constraints on this kind by resource name. Default values on this kind by resource name if omitted."
+      "description": "Default resource requirement limit value by resource name if resource limit is omitted."
+     },
+     "defaultRequest": {
+      "type": "any",
+      "description": "DefaultRequest is the default resource requirement request value by resource name if resource request is omitted."
+     },
+     "maxLimitRequestRatio": {
+      "type": "any",
+      "description": "MaxLimitRequestRatio if specified, the named resource must have a request and limit that are both non-zero where limit divided by request is less than or equal to the enumerated value; this represents the max burst for the named resource."
      }
     }
    },

cluster/saltbase/salt/kube-admission-controls/limit-range/limit-range.yaml

@@ -6,5 +6,5 @@ metadata:
 spec:
   limits:
     - type: "Container"
-      default:
+      defaultRequest:
         cpu: "100m"

docs/design/admission_control_limit_range.md

@@ -53,7 +53,7 @@ The **LimitRange** resource is scoped to a **Namespace**.
 ### Type
 
 ```go
-// A type of object that is limited
+// LimitType is a type of object that is limited
 type LimitType string
 
 const (
@@ -63,44 +63,50 @@ const (
   LimitTypeContainer LimitType = "Container"
 )
 
-// LimitRangeItem defines a min/max usage limit for any resource that matches on kind
+// LimitRangeItem defines a min/max usage limit for any resource that matches on kind.
 type LimitRangeItem struct {
-  // Type of resource that this limit applies to
-  Type LimitType `json:"type,omitempty" description:"type of resource that this limit applies to"`
-  // Max usage constraints on this kind by resource name
-  Max ResourceList `json:"max,omitempty" description:"max usage constraints on this kind by resource name"`
-  // Min usage constraints on this kind by resource name
-  Min ResourceList `json:"min,omitempty" description:"min usage constraints on this kind by resource name"`
-  // Default resource limits on this kind by resource name
-  Default ResourceList `json:"default,omitempty" description:"default resource limits values on this kind by resource name if omitted"`
-  // DefaultRequests resource requests on this kind by resource name
-  DefaultRequests ResourceList `json:"defaultRequests,omitempty" description:"default resource requests values on this kind by resource name if omitted"`
-  // LimitRequestRatio is the ratio of limit over request that is the maximum allowed burst for the named resource
-  LimitRequestRatio ResourceList `json:"limitRequestRatio,omitempty" description:"the ratio of limit over request that is the maximum allowed burst for the named resource. if specified, the named resource must have a request and limit that are both non-zero where limit divided by request is less than or equal to the enumerated value"`
+  // Type of resource that this limit applies to.
+  Type LimitType `json:"type,omitempty"`
+  // Max usage constraints on this kind by resource name.
+  Max ResourceList `json:"max,omitempty"`
+  // Min usage constraints on this kind by resource name.
+  Min ResourceList `json:"min,omitempty"`
+  // Default resource requirement limit value by resource name if resource limit is omitted.
+  Default ResourceList `json:"default,omitempty"`
+  // DefaultRequest is the default resource requirement request value by resource name if resource request is omitted.
+  DefaultRequest ResourceList `json:"defaultRequest,omitempty"`
+  // MaxLimitRequestRatio if specified, the named resource must have a request and limit that are both non-zero where limit divided by request is less than or equal to the enumerated value; this represents the max burst for the named resource.
+  MaxLimitRequestRatio ResourceList `json:"maxLimitRequestRatio,omitempty"`
 }
 
-// LimitRangeSpec defines a min/max usage limit for resources that match on kind
+// LimitRangeSpec defines a min/max usage limit for resources that match on kind.
 type LimitRangeSpec struct {
-  // Limits is the list of LimitRangeItem objects that are enforced
-  Limits []LimitRangeItem `json:"limits" description:"limits is the list of LimitRangeItem objects that are enforced"`
+  // Limits is the list of LimitRangeItem objects that are enforced.
+  Limits []LimitRangeItem `json:"limits"`
 }
 
-// LimitRange sets resource usage limits for each kind of resource in a Namespace
+// LimitRange sets resource usage limits for each kind of resource in a Namespace.
 type LimitRange struct {
   TypeMeta `json:",inline"`
-  ObjectMeta `json:"metadata,omitempty" description:"standard object metadata; see http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata"`
+  // Standard object's metadata.
+  // More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata
+  ObjectMeta `json:"metadata,omitempty"`
 
-  // Spec defines the limits enforced
-  Spec LimitRangeSpec `json:"spec,omitempty" description:"spec defines the limits enforced; http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status"`
+  // Spec defines the limits enforced.
+  // More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status
+  Spec LimitRangeSpec `json:"spec,omitempty"`
 }
 
 // LimitRangeList is a list of LimitRange items.
 type LimitRangeList struct {
   TypeMeta `json:",inline"`
-  ListMeta `json:"metadata,omitempty" description:"standard list metadata; see http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata"`
+  // Standard list metadata.
+  // More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#types-kinds
+  ListMeta `json:"metadata,omitempty"`
 
-  // Items is a list of LimitRange objects
-  Items []LimitRange `json:"items" description:"items is a list of LimitRange objects; see http://releases.k8s.io/HEAD/docs/design/admission_control_limit_range.md"`
+  // Items is a list of LimitRange objects.
+  // More info: http://releases.k8s.io/HEAD/docs/design/admission_control_limit_range.md
+  Items []LimitRange `json:"items"`
 }
 ```
 
@@ -108,7 +114,7 @@ type LimitRangeList struct {
 
 Validation of a **LimitRange** enforces that for a given named resource the following rules apply:
 
-Min (if specified) <= DefaultRequests (if specified) <= Default (if specified) <= Max (if specified)
+Min (if specified) <= DefaultRequest (if specified) <= Default (if specified) <= Max (if specified)
 
 ### Default Value Behavior
 
@@ -121,11 +127,11 @@ if LimitRangeItem.Default[resourceName] is undefined
 ```
 
 ```
-if LimitRangeItem.DefaultRequests[resourceName] is undefined
+if LimitRangeItem.DefaultRequest[resourceName] is undefined
   if LimitRangeItem.Default[resourceName] is defined
-    LimitRangeItem.DefaultRequests[resourceName] = LimitRangeItem.Default[resourceName]
+    LimitRangeItem.DefaultRequest[resourceName] = LimitRangeItem.Default[resourceName]
   else if LimitRangeItem.Min[resourceName] is defined
-    LimitRangeItem.DefaultRequests[resourceName] = LimitRangeItem.Min[resourceName]
+    LimitRangeItem.DefaultRequest[resourceName] = LimitRangeItem.Min[resourceName]
 ```
 
 ## AdmissionControl plugin: LimitRanger

docs/devel/api_changes.md

@@ -345,6 +345,22 @@ generator to create it from scratch.
 Unsurprisingly, adding manually written conversion also requires you to add tests to
 `pkg/api/<version>/conversion_test.go`.
 
+## Edit deep copy files
+
+At this point you have both the versioned API changes and the internal
+structure changes done.  You now need to generate code to handle deep copy
+of your versioned api objects.
+
+The deep copy code resides with each versioned API:
+   - `pkg/api/<version>/deep_copy_generated.go` containing auto-generated copy functions
+
+To regenerate them:
+   - run
+
+```sh
+hack/update-generated-deep-copies.sh
+```
+
 ## Update the fuzzer
 
 Part of our testing regimen for APIs is to "fuzz" (fill with random values) API

pkg/api/deep_copy_generated.go

@@ -626,6 +626,30 @@ func deepCopy_api_LimitRangeItem(in LimitRangeItem, out *LimitRangeItem, c *conv
 	} else {
 		out.Default = nil
 	}
+	if in.DefaultRequest != nil {
+		out.DefaultRequest = make(ResourceList)
+		for key, val := range in.DefaultRequest {
+			newVal := new(resource.Quantity)
+			if err := deepCopy_resource_Quantity(val, newVal, c); err != nil {
+				return err
+			}
+			out.DefaultRequest[key] = *newVal
+		}
+	} else {
+		out.DefaultRequest = nil
+	}
+	if in.MaxLimitRequestRatio != nil {
+		out.MaxLimitRequestRatio = make(ResourceList)
+		for key, val := range in.MaxLimitRequestRatio {
+			newVal := new(resource.Quantity)
+			if err := deepCopy_resource_Quantity(val, newVal, c); err != nil {
+				return err
+			}
+			out.MaxLimitRequestRatio[key] = *newVal
+		}
+	} else {
+		out.MaxLimitRequestRatio = nil
+	}
 	return nil
 }
 

pkg/api/testing/fuzzer.go

@@ -184,6 +184,28 @@ func FuzzerFor(t *testing.T, version string, src rand.Source) *fuzz.Fuzzer {
 			q.Limits[api.ResourceStorage] = *storageLimit.Copy()
 			q.Requests[api.ResourceStorage] = *storageLimit.Copy()
 		},
+		func(q *api.LimitRangeItem, c fuzz.Continue) {
+			randomQuantity := func() resource.Quantity {
+				return *resource.NewQuantity(c.Int63n(1000), resource.DecimalExponent)
+			}
+			cpuLimit := randomQuantity()
+
+			q.Type = api.LimitTypeContainer
+			q.Default = make(api.ResourceList)
+			q.Default[api.ResourceCPU] = *(cpuLimit.Copy())
+
+			q.DefaultRequest = make(api.ResourceList)
+			q.DefaultRequest[api.ResourceCPU] = *(cpuLimit.Copy())
+
+			q.Max = make(api.ResourceList)
+			q.Max[api.ResourceCPU] = *(cpuLimit.Copy())
+
+			q.Min = make(api.ResourceList)
+			q.Min[api.ResourceCPU] = *(cpuLimit.Copy())
+
+			q.MaxLimitRequestRatio = make(api.ResourceList)
+			q.MaxLimitRequestRatio[api.ResourceCPU] = resource.MustParse("10")
+		},
 		func(p *api.PullPolicy, c fuzz.Continue) {
 			policies := []api.PullPolicy{api.PullAlways, api.PullNever, api.PullIfNotPresent}
 			*p = policies[c.Rand.Intn(len(policies))]

pkg/api/types.go

@@ -1894,8 +1894,12 @@ type LimitRangeItem struct {
 	Max ResourceList `json:"max,omitempty"`
 	// Min usage constraints on this kind by resource name
 	Min ResourceList `json:"min,omitempty"`
-	// Default usage constraints on this kind by resource name
+	// Default resource requirement limit value by resource name.
 	Default ResourceList `json:"default,omitempty"`
+	// DefaultRequest resource requirement request value by resource name.
+	DefaultRequest ResourceList `json:"defaultRequest,omitempty"`
+	// MaxLimitRequestRatio represents the max burst value for the named resource
+	MaxLimitRequestRatio ResourceList `json:"maxLimitRequestRatio,omitempty"`
 }
 
 // LimitRangeSpec defines a min/max usage limit for resources that match on kind

pkg/api/v1/conversion_generated.go

@@ -730,6 +730,30 @@ func convert_api_LimitRangeItem_To_v1_LimitRangeItem(in *api.LimitRangeItem, out
 	} else {
 		out.Default = nil
 	}
+	if in.DefaultRequest != nil {
+		out.DefaultRequest = make(ResourceList)
+		for key, val := range in.DefaultRequest {
+			newVal := resource.Quantity{}
+			if err := s.Convert(&val, &newVal, 0); err != nil {
+				return err
+			}
+			out.DefaultRequest[ResourceName(key)] = newVal
+		}
+	} else {
+		out.DefaultRequest = nil
+	}
+	if in.MaxLimitRequestRatio != nil {
+		out.MaxLimitRequestRatio = make(ResourceList)
+		for key, val := range in.MaxLimitRequestRatio {
+			newVal := resource.Quantity{}
+			if err := s.Convert(&val, &newVal, 0); err != nil {
+				return err
+			}
+			out.MaxLimitRequestRatio[ResourceName(key)] = newVal
+		}
+	} else {
+		out.MaxLimitRequestRatio = nil
+	}
 	return nil
 }
 
@@ -3020,6 +3044,30 @@ func convert_v1_LimitRangeItem_To_api_LimitRangeItem(in *LimitRangeItem, out *ap
 	} else {
 		out.Default = nil
 	}
+	if in.DefaultRequest != nil {
+		out.DefaultRequest = make(api.ResourceList)
+		for key, val := range in.DefaultRequest {
+			newVal := resource.Quantity{}
+			if err := s.Convert(&val, &newVal, 0); err != nil {
+				return err
+			}
+			out.DefaultRequest[api.ResourceName(key)] = newVal
+		}
+	} else {
+		out.DefaultRequest = nil
+	}
+	if in.MaxLimitRequestRatio != nil {
+		out.MaxLimitRequestRatio = make(api.ResourceList)
+		for key, val := range in.MaxLimitRequestRatio {
+			newVal := resource.Quantity{}
+			if err := s.Convert(&val, &newVal, 0); err != nil {
+				return err
+			}
+			out.MaxLimitRequestRatio[api.ResourceName(key)] = newVal
+		}
+	} else {
+		out.MaxLimitRequestRatio = nil
+	}
 	return nil
 }
 

pkg/api/v1/deep_copy_generated.go

@@ -641,6 +641,30 @@ func deepCopy_v1_LimitRangeItem(in LimitRangeItem, out *LimitRangeItem, c *conve
 	} else {
 		out.Default = nil
 	}
+	if in.DefaultRequest != nil {
+		out.DefaultRequest = make(ResourceList)
+		for key, val := range in.DefaultRequest {
+			newVal := new(resource.Quantity)
+			if err := deepCopy_resource_Quantity(val, newVal, c); err != nil {
+				return err
+			}
+			out.DefaultRequest[key] = *newVal
+		}
+	} else {
+		out.DefaultRequest = nil
+	}
+	if in.MaxLimitRequestRatio != nil {
+		out.MaxLimitRequestRatio = make(ResourceList)
+		for key, val := range in.MaxLimitRequestRatio {
+			newVal := new(resource.Quantity)
+			if err := deepCopy_resource_Quantity(val, newVal, c); err != nil {
+				return err
+			}
+			out.MaxLimitRequestRatio[key] = *newVal
+		}
+	} else {
+		out.MaxLimitRequestRatio = nil
+	}
 	return nil
 }
 

pkg/api/v1/defaults.go

@@ -173,6 +173,37 @@ func addDefaultingFuncs() {
 				}
 			}
 		},
+		func(obj *LimitRangeItem) {
+			// for container limits, we apply default values
+			if obj.Type == LimitTypeContainer {
+
+				if obj.Default == nil {
+					obj.Default = make(ResourceList)
+				}
+				if obj.DefaultRequest == nil {
+					obj.DefaultRequest = make(ResourceList)
+				}
+
+				// If a default limit is unspecified, but the max is specified, default the limit to the max
+				for key, value := range obj.Max {
+					if _, exists := obj.Default[key]; !exists {
+						obj.Default[key] = *(value.Copy())
+					}
+				}
+				// If a default limit is specified, but the default request is not, default request to limit
+				for key, value := range obj.Default {
+					if _, exists := obj.DefaultRequest[key]; !exists {
+						obj.DefaultRequest[key] = *(value.Copy())
+					}
+				}
+				// If a default request is not specified, but the min is provided, default request to the min
+				for key, value := range obj.Min {
+					if _, exists := obj.DefaultRequest[key]; !exists {
+						obj.DefaultRequest[key] = *(value.Copy())
+					}
+				}
+			}
+		},
 	)
 }
 

pkg/api/v1/defaults_test.go

@@ -21,6 +21,7 @@ import (
 	"testing"
 
 	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/resource"
 	versioned "k8s.io/kubernetes/pkg/api/v1"
 	"k8s.io/kubernetes/pkg/runtime"
 	"k8s.io/kubernetes/pkg/util"
@@ -431,3 +432,45 @@ func TestSetDefaultObjectFieldSelectorAPIVersion(t *testing.T) {
 		t.Errorf("Expected default APIVersion v1, got: %v", apiVersion)
 	}
 }
+
+func TestSetDefaultLimitRangeItem(t *testing.T) {
+	limitRange := &versioned.LimitRange{
+		ObjectMeta: versioned.ObjectMeta{
+			Name: "test-defaults",
+		},
+		Spec: versioned.LimitRangeSpec{
+			Limits: []versioned.LimitRangeItem{{
+				Type: versioned.LimitTypeContainer,
+				Max: versioned.ResourceList{
+					versioned.ResourceCPU: resource.MustParse("100m"),
+				},
+				Min: versioned.ResourceList{
+					versioned.ResourceMemory: resource.MustParse("100Mi"),
+				},
+				Default:        versioned.ResourceList{},
+				DefaultRequest: versioned.ResourceList{},
+			}},
+		},
+	}
+
+	output := roundTrip(t, runtime.Object(limitRange))
+	limitRange2 := output.(*versioned.LimitRange)
+	defaultLimit := limitRange2.Spec.Limits[0].Default
+	defaultRequest := limitRange2.Spec.Limits[0].DefaultRequest
+
+	// verify that default cpu was set to the max
+	defaultValue := defaultLimit[versioned.ResourceCPU]
+	if defaultValue.String() != "100m" {
+		t.Errorf("Expected default cpu: %s, got: %s", "100m", defaultValue.String())
+	}
+	// verify that default request was set to the limit
+	requestValue := defaultRequest[versioned.ResourceCPU]
+	if requestValue.String() != "100m" {
+		t.Errorf("Expected request cpu: %s, got: %s", "100m", requestValue.String())
+	}
+	// verify that if a min is provided, it will be the default if no limit is specified
+	requestMinValue := defaultRequest[versioned.ResourceMemory]
+	if requestMinValue.String() != "100Mi" {
+		t.Errorf("Expected request memory: %s, got: %s", "100Mi", requestMinValue.String())
+	}
+}

pkg/api/v1/types.go

@@ -2266,9 +2266,12 @@ type LimitRangeItem struct {
 	Max ResourceList `json:"max,omitempty"`
 	// Min usage constraints on this kind by resource name.
 	Min ResourceList `json:"min,omitempty"`
-	// Default usage constraints on this kind by resource name.
-	// Default values on this kind by resource name if omitted.
+	// Default resource requirement limit value by resource name if resource limit is omitted.
 	Default ResourceList `json:"default,omitempty"`
+	// DefaultRequest is the default resource requirement request value by resource name if resource request is omitted.
+	DefaultRequest ResourceList `json:"defaultRequest,omitempty"`
+	// MaxLimitRequestRatio if specified, the named resource must have a request and limit that are both non-zero where limit divided by request is less than or equal to the enumerated value; this represents the max burst for the named resource.
+	MaxLimitRequestRatio ResourceList `json:"maxLimitRequestRatio,omitempty"`
 }
 
 // LimitRangeSpec defines a min/max usage limit for resources that match on kind.

pkg/api/v1/types_swagger_doc_generated.go

@@ -436,7 +436,9 @@ var map_LimitRangeItem = map[string]string{
 	"type":                 "Type of resource that this limit applies to.",
 	"max":                  "Max usage constraints on this kind by resource name.",
 	"min":                  "Min usage constraints on this kind by resource name.",
-	"default": "Default usage constraints on this kind by resource name. Default values on this kind by resource name if omitted.",
+	"default":              "Default resource requirement limit value by resource name if resource limit is omitted.",
+	"defaultRequest":       "DefaultRequest is the default resource requirement request value by resource name if resource request is omitted.",
+	"maxLimitRequestRatio": "MaxLimitRequestRatio if specified, the named resource must have a request and limit that are both non-zero where limit divided by request is less than or equal to the enumerated value; this represents the max burst for the named resource.",
 }
 
 func (LimitRangeItem) SwaggerDoc() map[string]string {

pkg/api/validation/validation.go

@@ -1352,6 +1352,7 @@ func ValidateLimitRange(limitRange *api.LimitRange) errs.ValidationErrorList {
 		min := map[string]int64{}
 		max := map[string]int64{}
 		defaults := map[string]int64{}
+		defaultRequests := map[string]int64{}
 
 		for k := range limit.Max {
 			allErrs = append(allErrs, validateResourceName(string(k), fmt.Sprintf("spec.limits[%d].max[%s]", i, k))...)
@@ -1371,28 +1372,56 @@ func ValidateLimitRange(limitRange *api.LimitRange) errs.ValidationErrorList {
 			q := limit.Default[k]
 			defaults[string(k)] = q.Value()
 		}
+		for k := range limit.DefaultRequest {
+			allErrs = append(allErrs, validateResourceName(string(k), fmt.Sprintf("spec.limits[%d].defaultRequest[%s]", i, k))...)
+			keys.Insert(string(k))
+			q := limit.DefaultRequest[k]
+			defaultRequests[string(k)] = q.Value()
+		}
+		for k := range limit.MaxLimitRequestRatio {
+			allErrs = append(allErrs, validateResourceName(string(k), fmt.Sprintf("spec.limits[%d].maxLimitRequestRatio[%s]", i, k))...)
+		}
 
 		for k := range keys {
 			minValue, minValueFound := min[k]
 			maxValue, maxValueFound := max[k]
 			defaultValue, defaultValueFound := defaults[k]
+			defaultRequestValue, defaultRequestValueFound := defaultRequests[k]
 
 			if minValueFound && maxValueFound && minValue > maxValue {
 				minQuantity := limit.Min[api.ResourceName(k)]
 				maxQuantity := limit.Max[api.ResourceName(k)]
-				allErrs = append(allErrs, errs.NewFieldInvalid(fmt.Sprintf("spec.limits[%d].max[%s]", i, k), minValue, fmt.Sprintf("min value %s is greater than max value %s", minQuantity.String(), maxQuantity.String())))
+				allErrs = append(allErrs, errs.NewFieldInvalid(fmt.Sprintf("spec.limits[%d].min[%s]", i, k), minValue, fmt.Sprintf("min value %s is greater than max value %s", minQuantity.String(), maxQuantity.String())))
+			}
+
+			if defaultRequestValueFound && minValueFound && minValue > defaultRequestValue {
+				minQuantity := limit.Min[api.ResourceName(k)]
+				defaultRequestQuantity := limit.DefaultRequest[api.ResourceName(k)]
+				allErrs = append(allErrs, errs.NewFieldInvalid(fmt.Sprintf("spec.limits[%d].defaultRequest[%s]", i, k), defaultRequestValue, fmt.Sprintf("min value %s is greater than default request value %s", minQuantity.String(), defaultRequestQuantity.String())))
+			}
+
+			if defaultRequestValueFound && maxValueFound && defaultRequestValue > maxValue {
+				maxQuantity := limit.Max[api.ResourceName(k)]
+				defaultRequestQuantity := limit.DefaultRequest[api.ResourceName(k)]
+				allErrs = append(allErrs, errs.NewFieldInvalid(fmt.Sprintf("spec.limits[%d].defaultRequest[%s]", i, k), defaultRequestValue, fmt.Sprintf("default request value %s is greater than max value %s", defaultRequestQuantity.String(), maxQuantity.String())))
+			}
+
+			if defaultRequestValueFound && defaultValueFound && defaultRequestValue > defaultValue {
+				defaultQuantity := limit.Default[api.ResourceName(k)]
+				defaultRequestQuantity := limit.DefaultRequest[api.ResourceName(k)]
+				allErrs = append(allErrs, errs.NewFieldInvalid(fmt.Sprintf("spec.limits[%d].defaultRequest[%s]", i, k), defaultRequestValue, fmt.Sprintf("default request value %s is greater than default limit value %s", defaultRequestQuantity.String(), defaultQuantity.String())))
 			}
 
 			if defaultValueFound && minValueFound && minValue > defaultValue {
 				minQuantity := limit.Min[api.ResourceName(k)]
 				defaultQuantity := limit.Default[api.ResourceName(k)]
-				allErrs = append(allErrs, errs.NewFieldInvalid(fmt.Sprintf("spec.limits[%d].max[%s]", i, k), minValue, fmt.Sprintf("min value %s is greater than default value %s", minQuantity.String(), defaultQuantity.String())))
+				allErrs = append(allErrs, errs.NewFieldInvalid(fmt.Sprintf("spec.limits[%d].default[%s]", i, k), minValue, fmt.Sprintf("min value %s is greater than default value %s", minQuantity.String(), defaultQuantity.String())))
 			}
 
 			if defaultValueFound && maxValueFound && defaultValue > maxValue {
 				maxQuantity := limit.Max[api.ResourceName(k)]
 				defaultQuantity := limit.Default[api.ResourceName(k)]
-				allErrs = append(allErrs, errs.NewFieldInvalid(fmt.Sprintf("spec.limits[%d].max[%s]", i, k), minValue, fmt.Sprintf("default value %s is greater than max value %s", defaultQuantity.String(), maxQuantity.String())))
+				allErrs = append(allErrs, errs.NewFieldInvalid(fmt.Sprintf("spec.limits[%d].default[%s]", i, k), maxValue, fmt.Sprintf("default value %s is greater than max value %s", defaultQuantity.String(), maxQuantity.String())))
 			}
 		}
 	}

pkg/api/validation/validation_test.go

@@ -2814,13 +2814,20 @@ func TestValidateLimitRange(t *testing.T) {
 					api.ResourceMemory: resource.MustParse("10000"),
 				},
 				Min: api.ResourceList{
-					api.ResourceCPU:    resource.MustParse("0"),
+					api.ResourceCPU:    resource.MustParse("5"),
 					api.ResourceMemory: resource.MustParse("100"),
 				},
 				Default: api.ResourceList{
 					api.ResourceCPU:    resource.MustParse("50"),
 					api.ResourceMemory: resource.MustParse("500"),
 				},
+				DefaultRequest: api.ResourceList{
+					api.ResourceCPU:    resource.MustParse("10"),
+					api.ResourceMemory: resource.MustParse("200"),
+				},
+				MaxLimitRequestRatio: api.ResourceList{
+					api.ResourceCPU: resource.MustParse("20"),
+				},
 			},
 		},
 	}
@@ -2879,6 +2886,43 @@ func TestValidateLimitRange(t *testing.T) {
 		},
 	}
 
+	invalidSpecRangeDefaultRequestOutsideRange := api.LimitRangeSpec{
+		Limits: []api.LimitRangeItem{
+			{
+				Type: api.LimitTypePod,
+				Max: api.ResourceList{
+					api.ResourceCPU: resource.MustParse("1000"),
+				},
+				Min: api.ResourceList{
+					api.ResourceCPU: resource.MustParse("100"),
+				},
+				DefaultRequest: api.ResourceList{
+					api.ResourceCPU: resource.MustParse("2000"),
+				},
+			},
+		},
+	}
+
+	invalidSpecRangeRequestMoreThanDefaultRange := api.LimitRangeSpec{
+		Limits: []api.LimitRangeItem{
+			{
+				Type: api.LimitTypePod,
+				Max: api.ResourceList{
+					api.ResourceCPU: resource.MustParse("1000"),
+				},
+				Min: api.ResourceList{
+					api.ResourceCPU: resource.MustParse("100"),
+				},
+				Default: api.ResourceList{
+					api.ResourceCPU: resource.MustParse("500"),
+				},
+				DefaultRequest: api.ResourceList{
+					api.ResourceCPU: resource.MustParse("800"),
+				},
+			},
+		},
+	}
+
 	successCases := []api.LimitRange{
 		{
 			ObjectMeta: api.ObjectMeta{
@@ -2927,6 +2971,14 @@ func TestValidateLimitRange(t *testing.T) {
 			api.LimitRange{ObjectMeta: api.ObjectMeta{Name: "abc", Namespace: "foo"}, Spec: invalidSpecRangeDefaultOutsideRange},
 			"default value 2k is greater than max value 1k",
 		},
+		"invalid spec defaultrequest outside range": {
+			api.LimitRange{ObjectMeta: api.ObjectMeta{Name: "abc", Namespace: "foo"}, Spec: invalidSpecRangeDefaultRequestOutsideRange},
+			"default request value 2k is greater than max value 1k",
+		},
+		"invalid spec defaultrequest more than default": {
+			api.LimitRange{ObjectMeta: api.ObjectMeta{Name: "abc", Namespace: "foo"}, Spec: invalidSpecRangeRequestMoreThanDefaultRange},
+			"default request value 800 is greater than default limit value 500",
+		},
 	}
 	for k, v := range errorCases {
 		errs := ValidateLimitRange(&v.R)

pkg/kubectl/describe.go

@@ -182,14 +182,16 @@ func DescribeLimitRanges(limitRanges *api.LimitRangeList, w io.Writer) {
 		fmt.Fprint(w, "No resource limits.\n")
 		return
 	}
-	fmt.Fprintf(w, "Resource Limits\n Type\tResource\tMin\tMax\tDefault\n")
-	fmt.Fprintf(w, " ----\t--------\t---\t---\t---\n")
+	fmt.Fprintf(w, "Resource Limits\n Type\tResource\tMin\tMax\tRequest\tLimit\tLimit/Request\n")
+	fmt.Fprintf(w, " ----\t--------\t---\t---\t-------\t-----\t-------------\n")
 	for _, limitRange := range limitRanges.Items {
 		for i := range limitRange.Spec.Limits {
 			item := limitRange.Spec.Limits[i]
 			maxResources := item.Max
 			minResources := item.Min
-			defaultResources := item.Default
+			defaultLimitResources := item.Default
+			defaultRequestResources := item.DefaultRequest
+			ratio := item.MaxLimitRequestRatio
 
 			set := map[api.ResourceName]bool{}
 			for k := range maxResources {
@@ -198,7 +200,13 @@ func DescribeLimitRanges(limitRanges *api.LimitRangeList, w io.Writer) {
 			for k := range minResources {
 				set[k] = true
 			}
-			for k := range defaultResources {
+			for k := range defaultLimitResources {
+				set[k] = true
+			}
+			for k := range defaultRequestResources {
+				set[k] = true
+			}
+			for k := range ratio {
 				set[k] = true
 			}
 
@@ -206,7 +214,9 @@ func DescribeLimitRanges(limitRanges *api.LimitRangeList, w io.Writer) {
 				// if no value is set, we output -
 				maxValue := "-"
 				minValue := "-"
-				defaultValue := "-"
+				defaultLimitValue := "-"
+				defaultRequestValue := "-"
+				ratioValue := "-"
 
 				maxQuantity, maxQuantityFound := maxResources[k]
 				if maxQuantityFound {
@@ -218,13 +228,23 @@ func DescribeLimitRanges(limitRanges *api.LimitRangeList, w io.Writer) {
 					minValue = minQuantity.String()
 				}
 
-				defaultQuantity, defaultQuantityFound := defaultResources[k]
-				if defaultQuantityFound {
-					defaultValue = defaultQuantity.String()
+				defaultLimitQuantity, defaultLimitQuantityFound := defaultLimitResources[k]
+				if defaultLimitQuantityFound {
+					defaultLimitValue = defaultLimitQuantity.String()
+				}
+
+				defaultRequestQuantity, defaultRequestQuantityFound := defaultRequestResources[k]
+				if defaultRequestQuantityFound {
+					defaultRequestValue = defaultRequestQuantity.String()
+				}
+
+				ratioQuantity, ratioQuantityFound := ratio[k]
+				if ratioQuantityFound {
+					ratioValue = ratioQuantity.String()
 				}
 
-				msg := " %v\t%v\t%v\t%v\t%v\n"
-				fmt.Fprintf(w, msg, item.Type, k, minValue, maxValue, defaultValue)
+				msg := " %s\t%v\t%v\t%v\t%v\t%v\t%v\n"
+				fmt.Fprintf(w, msg, item.Type, k, minValue, maxValue, defaultRequestValue, defaultLimitValue, ratioValue)
 			}
 		}
 	}
@@ -287,13 +307,15 @@ func describeLimitRange(limitRange *api.LimitRange) (string, error) {
 	return tabbedString(func(out io.Writer) error {
 		fmt.Fprintf(out, "Name:\t%s\n", limitRange.Name)
 		fmt.Fprintf(out, "Namespace:\t%s\n", limitRange.Namespace)
-		fmt.Fprintf(out, "Type\tResource\tMin\tMax\tDefault\n")
-		fmt.Fprintf(out, "----\t--------\t---\t---\t---\n")
+		fmt.Fprintf(out, "Type\tResource\tMin\tMax\tRequest\tLimit\tLimit/Request\n")
+		fmt.Fprintf(out, "----\t--------\t---\t---\t-------\t-----\t-------------\n")
 		for i := range limitRange.Spec.Limits {
 			item := limitRange.Spec.Limits[i]
 			maxResources := item.Max
 			minResources := item.Min
-			defaultResources := item.Default
+			defaultLimitResources := item.Default
+			defaultRequestResources := item.DefaultRequest
+			ratio := item.MaxLimitRequestRatio
 
 			set := map[api.ResourceName]bool{}
 			for k := range maxResources {
@@ -302,7 +324,13 @@ func describeLimitRange(limitRange *api.LimitRange) (string, error) {
 			for k := range minResources {
 				set[k] = true
 			}
-			for k := range defaultResources {
+			for k := range defaultLimitResources {
+				set[k] = true
+			}
+			for k := range defaultRequestResources {
+				set[k] = true
+			}
+			for k := range ratio {
 				set[k] = true
 			}
 
@@ -310,7 +338,9 @@ func describeLimitRange(limitRange *api.LimitRange) (string, error) {
 				// if no value is set, we output -
 				maxValue := "-"
 				minValue := "-"
-				defaultValue := "-"
+				defaultLimitValue := "-"
+				defaultRequestValue := "-"
+				ratioValue := "-"
 
 				maxQuantity, maxQuantityFound := maxResources[k]
 				if maxQuantityFound {
@@ -322,13 +352,23 @@ func describeLimitRange(limitRange *api.LimitRange) (string, error) {
 					minValue = minQuantity.String()
 				}
 
-				defaultQuantity, defaultQuantityFound := defaultResources[k]
-				if defaultQuantityFound {
-					defaultValue = defaultQuantity.String()
+				defaultLimitQuantity, defaultLimitQuantityFound := defaultLimitResources[k]
+				if defaultLimitQuantityFound {
+					defaultLimitValue = defaultLimitQuantity.String()
+				}
+
+				defaultRequestQuantity, defaultRequestQuantityFound := defaultRequestResources[k]
+				if defaultRequestQuantityFound {
+					defaultRequestValue = defaultRequestQuantity.String()
+				}
+
+				ratioQuantity, ratioQuantityFound := ratio[k]
+				if ratioQuantityFound {
+					ratioValue = ratioQuantity.String()
 				}
 
-				msg := "%v\t%v\t%v\t%v\t%v\n"
-				fmt.Fprintf(out, msg, item.Type, k, minValue, maxValue, defaultValue)
+				msg := "%v\t%v\t%v\t%v\t%v\t%v\t%v\n"
+				fmt.Fprintf(out, msg, item.Type, k, minValue, maxValue, defaultRequestValue, defaultLimitValue, ratioValue)
 			}
 		}
 		return nil

plugin/pkg/admission/limitranger/admission.go

@@ -138,15 +138,19 @@ func Limit(limitRange *api.LimitRange, resourceName string, obj runtime.Object)
 
 // defaultContainerResourceRequirements returns the default requirements for a container
 // the requirement.Limits are taken from the LimitRange defaults (if specified)
-// the requirement.Requests are taken from the LimitRange min (if specified)
+// the requirement.Requests are taken from the LimitRange default request (if specified)
 func defaultContainerResourceRequirements(limitRange *api.LimitRange) api.ResourceRequirements {
 	requirements := api.ResourceRequirements{}
-	requirements.Limits = api.ResourceList{}
 	requirements.Requests = api.ResourceList{}
+	requirements.Limits = api.ResourceList{}
 
 	for i := range limitRange.Spec.Limits {
 		limit := limitRange.Spec.Limits[i]
 		if limit.Type == api.LimitTypeContainer {
+			for k, v := range limit.DefaultRequest {
+				value := v.Copy()
+				requirements.Requests[k] = *value
+			}
 			for k, v := range limit.Default {
 				value := v.Copy()
 				requirements.Limits[k] = *value
@@ -181,91 +185,176 @@ func mergePodResourceRequirements(pod *api.Pod, defaultRequirements *api.Resourc
 	}
 }
 
-// PodLimitFunc enforces resource requirements enumerated by the pod against
-// the specified LimitRange.  The pod may be modified to apply default resource
-// requirements if not specified, and enumerated on the LimitRange
-func PodLimitFunc(limitRange *api.LimitRange, pod *api.Pod) error {
+// requestLimitEnforcedValues returns the specified values at a common precision to support comparability
+func requestLimitEnforcedValues(requestQuantity, limitQuantity, enforcedQuantity resource.Quantity) (request, limit, enforced int64) {
+	request = requestQuantity.Value()
+	limit = limitQuantity.Value()
+	enforced = enforcedQuantity.Value()
+	// do a more precise comparison if possible (if the value won't overflow)
+	if request <= resource.MaxMilliValue && limit <= resource.MaxMilliValue && enforced <= resource.MaxMilliValue {
+		request = requestQuantity.MilliValue()
+		limit = limitQuantity.MilliValue()
+		enforced = enforcedQuantity.MilliValue()
+	}
+	return
+}
 
-	defaultResources := defaultContainerResourceRequirements(limitRange)
-	mergePodResourceRequirements(pod, &defaultResources)
+// minConstraint enforces the min constraint over the specified resource
+func minConstraint(limitType api.LimitType, resourceName api.ResourceName, enforced resource.Quantity, request api.ResourceList, limit api.ResourceList) error {
+	req, reqExists := request[resourceName]
+	lim, limExists := limit[resourceName]
+	observedReqValue, observedLimValue, enforcedValue := requestLimitEnforcedValues(req, lim, enforced)
 
-	podCPU := int64(0)
-	podMem := int64(0)
+	if !reqExists {
+		return fmt.Errorf("Minimum %s usage per %s is %s.  No request is specified.", resourceName, limitType, enforced.String())
+	}
+	if observedReqValue < enforcedValue {
+		return fmt.Errorf("Minimum %s usage per %s is %s, but request is %s.", resourceName, limitType, enforced.String(), req.String())
+	}
+	if limExists && (observedLimValue < enforcedValue) {
+		return fmt.Errorf("Minimum %s usage per %s is %s, but limit is %s.", resourceName, limitType, enforced.String(), lim.String())
+	}
+	return nil
+}
 
-	minContainerCPU := int64(0)
-	minContainerMem := int64(0)
-	maxContainerCPU := int64(0)
-	maxContainerMem := int64(0)
+// maxConstraint enforces the max constraint over the specified resource
+func maxConstraint(limitType api.LimitType, resourceName api.ResourceName, enforced resource.Quantity, request api.ResourceList, limit api.ResourceList) error {
+	req, reqExists := request[resourceName]
+	lim, limExists := limit[resourceName]
+	observedReqValue, observedLimValue, enforcedValue := requestLimitEnforcedValues(req, lim, enforced)
 
-	for i := range pod.Spec.Containers {
-		container := &pod.Spec.Containers[i]
-		containerCPU := container.Resources.Limits.Cpu().MilliValue()
-		containerMem := container.Resources.Limits.Memory().Value()
+	if !limExists {
+		return fmt.Errorf("Maximum %s usage per %s is %s.  No limit is specified.", resourceName, limitType, enforced.String())
+	}
+	if observedLimValue > enforcedValue {
+		return fmt.Errorf("Maximum %s usage per %s is %s, but limit is %s.", resourceName, limitType, enforced.String(), lim.String())
+	}
+	if reqExists && (observedReqValue > enforcedValue) {
+		return fmt.Errorf("Maximum %s usage per %s is %s, but request is %s.", resourceName, limitType, enforced.String(), req.String())
+	}
+	return nil
+}
+
+// limitRequestRatioConstraint enforces the limit to request ratio over the specified resource
+func limitRequestRatioConstraint(limitType api.LimitType, resourceName api.ResourceName, enforced resource.Quantity, request api.ResourceList, limit api.ResourceList) error {
+	req, reqExists := request[resourceName]
+	lim, limExists := limit[resourceName]
+	observedReqValue, observedLimValue, enforcedValue := requestLimitEnforcedValues(req, lim, enforced)
+
+	if !reqExists || (observedReqValue == int64(0)) {
+		return fmt.Errorf("%s max limit to request ratio per %s is %s, but no request is specified or request is 0.", resourceName, limitType, enforced.String())
+	}
+	if !limExists || (observedLimValue == int64(0)) {
+		return fmt.Errorf("%s max limit to request ratio per %s is %s, but no limit is specified or limit is 0.", resourceName, limitType, enforced.String())
+	}
+
+	observedValue := observedLimValue / observedReqValue
+
+	if observedValue > enforcedValue {
+		return fmt.Errorf("%s max limit to request ratio per %s is %s, but provided ratio is %d.", resourceName, limitType, enforced.String(), observedValue)
+	}
+
+	return nil
+}
 
-		if i == 0 {
-			minContainerCPU = containerCPU
-			minContainerMem = containerMem
-			maxContainerCPU = containerCPU
-			maxContainerMem = containerMem
+// sum takes the total of each named resource across all inputs
+// if a key is not in each input, then the output resource list will omit the key
+func sum(inputs []api.ResourceList) api.ResourceList {
+	result := api.ResourceList{}
+	keys := []api.ResourceName{}
+	for i := range inputs {
+		for k := range inputs[i] {
+			keys = append(keys, k)
+		}
+	}
+	for _, key := range keys {
+		total, isSet := int64(0), true
+
+		for i := range inputs {
+			input := inputs[i]
+			v, exists := input[key]
+			if exists {
+				if key == api.ResourceCPU {
+					total = total + v.MilliValue()
+				} else {
+					total = total + v.Value()
+				}
+			} else {
+				isSet = false
+			}
 		}
 
-		podCPU = podCPU + container.Resources.Limits.Cpu().MilliValue()
-		podMem = podMem + container.Resources.Limits.Memory().Value()
+		if isSet {
+			if key == api.ResourceCPU {
+				result[key] = *(resource.NewMilliQuantity(total, resource.DecimalSI))
+			} else {
+				result[key] = *(resource.NewQuantity(total, resource.DecimalSI))
+			}
 
-		minContainerCPU = Min(containerCPU, minContainerCPU)
-		minContainerMem = Min(containerMem, minContainerMem)
-		maxContainerCPU = Max(containerCPU, maxContainerCPU)
-		maxContainerMem = Max(containerMem, maxContainerMem)
 		}
+	}
+	return result
+}
+
+// PodLimitFunc enforces resource requirements enumerated by the pod against
+// the specified LimitRange.  The pod may be modified to apply default resource
+// requirements if not specified, and enumerated on the LimitRange
+func PodLimitFunc(limitRange *api.LimitRange, pod *api.Pod) error {
+	defaultResources := defaultContainerResourceRequirements(limitRange)
+	mergePodResourceRequirements(pod, &defaultResources)
 
 	for i := range limitRange.Spec.Limits {
 		limit := limitRange.Spec.Limits[i]
-		for _, minOrMax := range []string{"Min", "Max"} {
-			var rl api.ResourceList
-			switch minOrMax {
-			case "Min":
-				rl = limit.Min
-			case "Max":
-				rl = limit.Max
-			}
-			for k, v := range rl {
-				observed := int64(0)
-				enforced := int64(0)
-				var err error
-				switch k {
-				case api.ResourceMemory:
-					enforced = v.Value()
-					switch limit.Type {
-					case api.LimitTypePod:
-						observed = podMem
-						err = fmt.Errorf("%simum memory usage per pod is %s", minOrMax, v.String())
-					case api.LimitTypeContainer:
-						observed = maxContainerMem
-						err = fmt.Errorf("%simum memory usage per container is %s", minOrMax, v.String())
-					}
-				case api.ResourceCPU:
-					enforced = v.MilliValue()
-					switch limit.Type {
-					case api.LimitTypePod:
-						observed = podCPU
-						err = fmt.Errorf("%simum CPU usage per pod is %s, but requested %s", minOrMax, v.String(), resource.NewMilliQuantity(observed, resource.DecimalSI))
-					case api.LimitTypeContainer:
-						observed = maxContainerCPU
-						err = fmt.Errorf("%simum CPU usage per container is %s", minOrMax, v.String())
-					}
-				}
-				switch minOrMax {
-				case "Min":
-					if observed < enforced {
+		limitType := limit.Type
+
+		// enforce container limits
+		if limitType == api.LimitTypeContainer {
+			for j := range pod.Spec.Containers {
+				container := &pod.Spec.Containers[j]
+				for k, v := range limit.Min {
+					if err := minConstraint(limitType, k, v, container.Resources.Requests, container.Resources.Limits); err != nil {
 						return err
 					}
-				case "Max":
-					if observed > enforced {
+				}
+				for k, v := range limit.Max {
+					if err := maxConstraint(limitType, k, v, container.Resources.Requests, container.Resources.Limits); err != nil {
+						return err
+					}
+				}
+				for k, v := range limit.MaxLimitRequestRatio {
+					if err := limitRequestRatioConstraint(limitType, k, v, container.Resources.Requests, container.Resources.Limits); err != nil {
 						return err
 					}
 				}
 			}
 		}
+
+		// enforce pod limits
+		if limitType == api.LimitTypePod {
+			containerRequests, containerLimits := []api.ResourceList{}, []api.ResourceList{}
+			for j := range pod.Spec.Containers {
+				container := &pod.Spec.Containers[j]
+				containerRequests = append(containerRequests, container.Resources.Requests)
+				containerLimits = append(containerLimits, container.Resources.Limits)
+			}
+			podRequests := sum(containerRequests)
+			podLimits := sum(containerLimits)
+			for k, v := range limit.Min {
+				if err := minConstraint(limitType, k, v, podRequests, podLimits); err != nil {
+					return err
+				}
+			}
+			for k, v := range limit.Max {
+				if err := maxConstraint(limitType, k, v, podRequests, podLimits); err != nil {
+					return err
+				}
+			}
+			for k, v := range limit.MaxLimitRequestRatio {
+				if err := limitRequestRatioConstraint(limitType, k, v, podRequests, podLimits); err != nil {
+					return err
+				}
+			}
+		}
 	}
 	return nil
 }

plugin/pkg/admission/limitranger/admission_test.go

@@ -38,13 +38,34 @@ func getResourceList(cpu, memory string) api.ResourceList {
 	return res
 }
 
-func getResourceRequirements(limits, requests api.ResourceList) api.ResourceRequirements {
+func getResourceRequirements(requests, limits api.ResourceList) api.ResourceRequirements {
 	res := api.ResourceRequirements{}
-	res.Limits = limits
 	res.Requests = requests
+	res.Limits = limits
 	return res
 }
 
+// createLimitRange creates a limit range with the specified data
+func createLimitRange(limitType api.LimitType, min, max, defaultLimit, defaultRequest api.ResourceList) api.LimitRange {
+	return api.LimitRange{
+		ObjectMeta: api.ObjectMeta{
+			Name:      "abc",
+			Namespace: "test",
+		},
+		Spec: api.LimitRangeSpec{
+			Limits: []api.LimitRangeItem{
+				{
+					Type:           limitType,
+					Min:            min,
+					Max:            max,
+					Default:        defaultLimit,
+					DefaultRequest: defaultRequest,
+				},
+			},
+		},
+	}
+}
+
 func validLimitRange() api.LimitRange {
 	return api.LimitRange{
 		ObjectMeta: api.ObjectMeta{
@@ -62,7 +83,8 @@ func validLimitRange() api.LimitRange {
 					Type:           api.LimitTypeContainer,
 					Max:            getResourceList("100m", "2Gi"),
 					Min:            getResourceList("25m", "1Mi"),
-					Default: getResourceList("50m", "5Mi"),
+					Default:        getResourceList("75m", "10Mi"),
+					DefaultRequest: getResourceList("50m", "5Mi"),
 				},
 			},
 		},
@@ -110,8 +132,8 @@ func validPod(name string, numContainers int, resources api.ResourceRequirements
 func TestDefaultContainerResourceRequirements(t *testing.T) {
 	limitRange := validLimitRange()
 	expected := api.ResourceRequirements{
-		Limits:   getResourceList("50m", "5Mi"),
-		Requests: api.ResourceList{},
+		Requests: getResourceList("50m", "5Mi"),
+		Limits:   getResourceList("75m", "10Mi"),
 	}
 
 	actual := defaultContainerResourceRequirements(&limitRange)
@@ -125,7 +147,7 @@ func TestDefaultContainerResourceRequirements(t *testing.T) {
 func TestMergePodResourceRequirements(t *testing.T) {
 	limitRange := validLimitRange()
 
-	// pod with no resources enumerated should get each resource from default
+	// pod with no resources enumerated should get each resource from default request
 	expected := getResourceRequirements(getResourceList("", ""), getResourceList("", ""))
 	pod := validPod("empty-resources", 1, expected)
 	defaultRequirements := defaultContainerResourceRequirements(&limitRange)
@@ -141,11 +163,11 @@ func TestMergePodResourceRequirements(t *testing.T) {
 	input := getResourceRequirements(getResourceList("", "512Mi"), getResourceList("", ""))
 	pod = validPod("limit-memory", 1, input)
 	expected = api.ResourceRequirements{
-		Limits: api.ResourceList{
-			api.ResourceCPU:    defaultRequirements.Limits[api.ResourceCPU],
+		Requests: api.ResourceList{
+			api.ResourceCPU:    defaultRequirements.Requests[api.ResourceCPU],
 			api.ResourceMemory: resource.MustParse("512Mi"),
 		},
-		Requests: api.ResourceList{},
+		Limits: defaultRequirements.Limits,
 	}
 	mergePodResourceRequirements(&pod, &defaultRequirements)
 	for i := range pod.Spec.Containers {
@@ -157,34 +179,172 @@ func TestMergePodResourceRequirements(t *testing.T) {
 }
 
 func TestPodLimitFunc(t *testing.T) {
-	limitRange := validLimitRange()
-	successCases := []api.Pod{
-		validPod("foo", 2, getResourceRequirements(getResourceList("100m", "2Gi"), getResourceList("", ""))),
-		validPod("bar", 1, getResourceRequirements(getResourceList("100m", "2Gi"), getResourceList("", ""))),
+	type testCase struct {
+		pod        api.Pod
+		limitRange api.LimitRange
 	}
 
-	errorCases := map[string]api.Pod{
-		"min-container-cpu": validPod("foo", 1, getResourceRequirements(getResourceList("25m", "2Gi"), getResourceList("", ""))),
-		"max-container-cpu": validPod("foo", 1, getResourceRequirements(getResourceList("110m", "1Gi"), getResourceList("", ""))),
-		"min-container-mem": validPod("foo", 1, getResourceRequirements(getResourceList("30m", "0"), getResourceList("", ""))),
-		"max-container-mem": validPod("foo", 1, getResourceRequirements(getResourceList("30m", "3Gi"), getResourceList("", ""))),
-		"min-pod-cpu":       validPod("foo", 1, getResourceRequirements(getResourceList("40m", "2Gi"), getResourceList("", ""))),
-		"max-pod-cpu":       validPod("foo", 4, getResourceRequirements(getResourceList("60m", "1Mi"), getResourceList("", ""))),
-		"max-pod-memory":    validPod("foo", 3, getResourceRequirements(getResourceList("60m", "2Gi"), getResourceList("", ""))),
-		"min-pod-memory":    validPod("foo", 3, getResourceRequirements(getResourceList("60m", "0"), getResourceList("", ""))),
+	successCases := []testCase{
+		{
+			pod:        validPod("ctr-min-cpu-request", 1, getResourceRequirements(getResourceList("100m", ""), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, getResourceList("50m", ""), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-min-cpu-request-limit", 1, getResourceRequirements(getResourceList("100m", ""), getResourceList("200m", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, getResourceList("50m", ""), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-min-memory-request", 1, getResourceRequirements(getResourceList("", "60Mi"), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, getResourceList("", "50Mi"), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-min-memory-request-limit", 1, getResourceRequirements(getResourceList("", "60Mi"), getResourceList("", "100Mi"))),
+			limitRange: createLimitRange(api.LimitTypeContainer, getResourceList("", "50Mi"), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-max-cpu-request-limit", 1, getResourceRequirements(getResourceList("500m", ""), getResourceList("1", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, api.ResourceList{}, getResourceList("2", ""), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-max-cpu-limit", 1, getResourceRequirements(getResourceList("", ""), getResourceList("1", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, api.ResourceList{}, getResourceList("2", ""), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-max-mem-request-limit", 1, getResourceRequirements(getResourceList("", "250Mi"), getResourceList("", "500Mi"))),
+			limitRange: createLimitRange(api.LimitTypeContainer, api.ResourceList{}, getResourceList("", "1Gi"), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-max-mem-limit", 1, getResourceRequirements(getResourceList("", ""), getResourceList("", "500Mi"))),
+			limitRange: createLimitRange(api.LimitTypeContainer, api.ResourceList{}, getResourceList("", "1Gi"), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-min-cpu-request", 2, getResourceRequirements(getResourceList("75m", ""), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypePod, getResourceList("100m", ""), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-min-cpu-request-limit", 2, getResourceRequirements(getResourceList("75m", ""), getResourceList("200m", ""))),
+			limitRange: createLimitRange(api.LimitTypePod, getResourceList("100m", ""), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-min-memory-request", 2, getResourceRequirements(getResourceList("", "60Mi"), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypePod, getResourceList("", "100Mi"), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-min-memory-request-limit", 2, getResourceRequirements(getResourceList("", "60Mi"), getResourceList("", "100Mi"))),
+			limitRange: createLimitRange(api.LimitTypePod, getResourceList("", "100Mi"), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-max-cpu-request-limit", 2, getResourceRequirements(getResourceList("500m", ""), getResourceList("1", ""))),
+			limitRange: createLimitRange(api.LimitTypePod, api.ResourceList{}, getResourceList("2", ""), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-max-cpu-limit", 2, getResourceRequirements(getResourceList("", ""), getResourceList("1", ""))),
+			limitRange: createLimitRange(api.LimitTypePod, api.ResourceList{}, getResourceList("2", ""), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-max-mem-request-limit", 2, getResourceRequirements(getResourceList("", "250Mi"), getResourceList("", "500Mi"))),
+			limitRange: createLimitRange(api.LimitTypePod, api.ResourceList{}, getResourceList("", "1Gi"), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-max-mem-limit", 2, getResourceRequirements(getResourceList("", ""), getResourceList("", "500Mi"))),
+			limitRange: createLimitRange(api.LimitTypePod, api.ResourceList{}, getResourceList("", "1Gi"), api.ResourceList{}, api.ResourceList{}),
+		},
 	}
-
 	for i := range successCases {
-		err := PodLimitFunc(&limitRange, &successCases[i])
+		test := successCases[i]
+		err := PodLimitFunc(&test.limitRange, &test.pod)
 		if err != nil {
-			t.Errorf("Unexpected error for valid pod: %v, %v", successCases[i].Name, err)
+			t.Errorf("Unexpected error for pod: %s, %v", test.pod.Name, err)
 		}
 	}
 
-	for k, v := range errorCases {
-		err := PodLimitFunc(&limitRange, &v)
+	errorCases := []testCase{
+		{
+			pod:        validPod("ctr-min-cpu-request", 1, getResourceRequirements(getResourceList("40m", ""), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, getResourceList("50m", ""), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-min-cpu-request-limit", 1, getResourceRequirements(getResourceList("40m", ""), getResourceList("200m", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, getResourceList("50m", ""), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-min-cpu-no-request-limit", 1, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, getResourceList("50m", ""), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-min-memory-request", 1, getResourceRequirements(getResourceList("", "40Mi"), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, getResourceList("", "50Mi"), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-min-memory-request-limit", 1, getResourceRequirements(getResourceList("", "40Mi"), getResourceList("", "100Mi"))),
+			limitRange: createLimitRange(api.LimitTypeContainer, getResourceList("", "50Mi"), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-min-memory-no-request-limit", 1, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, getResourceList("", "50Mi"), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-max-cpu-request-limit", 1, getResourceRequirements(getResourceList("500m", ""), getResourceList("2500m", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, api.ResourceList{}, getResourceList("2", ""), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-max-cpu-limit", 1, getResourceRequirements(getResourceList("", ""), getResourceList("2500m", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, api.ResourceList{}, getResourceList("2", ""), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-max-cpu-no-request-limit", 1, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, api.ResourceList{}, getResourceList("2", ""), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-max-mem-request-limit", 1, getResourceRequirements(getResourceList("", "250Mi"), getResourceList("", "2Gi"))),
+			limitRange: createLimitRange(api.LimitTypeContainer, api.ResourceList{}, getResourceList("", "1Gi"), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-max-mem-limit", 1, getResourceRequirements(getResourceList("", ""), getResourceList("", "2Gi"))),
+			limitRange: createLimitRange(api.LimitTypeContainer, api.ResourceList{}, getResourceList("", "1Gi"), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("ctr-max-mem-no-request-limit", 1, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypeContainer, api.ResourceList{}, getResourceList("", "1Gi"), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-min-cpu-request", 1, getResourceRequirements(getResourceList("75m", ""), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypePod, getResourceList("100m", ""), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-min-cpu-request-limit", 1, getResourceRequirements(getResourceList("75m", ""), getResourceList("200m", ""))),
+			limitRange: createLimitRange(api.LimitTypePod, getResourceList("100m", ""), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-min-memory-request", 1, getResourceRequirements(getResourceList("", "60Mi"), getResourceList("", ""))),
+			limitRange: createLimitRange(api.LimitTypePod, getResourceList("", "100Mi"), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-min-memory-request-limit", 1, getResourceRequirements(getResourceList("", "60Mi"), getResourceList("", "100Mi"))),
+			limitRange: createLimitRange(api.LimitTypePod, getResourceList("", "100Mi"), api.ResourceList{}, api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-max-cpu-request-limit", 3, getResourceRequirements(getResourceList("500m", ""), getResourceList("1", ""))),
+			limitRange: createLimitRange(api.LimitTypePod, api.ResourceList{}, getResourceList("2", ""), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-max-cpu-limit", 3, getResourceRequirements(getResourceList("", ""), getResourceList("1", ""))),
+			limitRange: createLimitRange(api.LimitTypePod, api.ResourceList{}, getResourceList("2", ""), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-max-mem-request-limit", 3, getResourceRequirements(getResourceList("", "250Mi"), getResourceList("", "500Mi"))),
+			limitRange: createLimitRange(api.LimitTypePod, api.ResourceList{}, getResourceList("", "1Gi"), api.ResourceList{}, api.ResourceList{}),
+		},
+		{
+			pod:        validPod("pod-max-mem-limit", 3, getResourceRequirements(getResourceList("", ""), getResourceList("", "500Mi"))),
+			limitRange: createLimitRange(api.LimitTypePod, api.ResourceList{}, getResourceList("", "1Gi"), api.ResourceList{}, api.ResourceList{}),
+		},
+	}
+	for i := range errorCases {
+		test := errorCases[i]
+		err := PodLimitFunc(&test.limitRange, &test.pod)
 		if err == nil {
-			t.Errorf("Expected error for %s", k)
+			t.Errorf("Expected error for pod: %s", test.pod.Name)
 		}
 	}
 }
@@ -199,23 +359,22 @@ func TestPodLimitFuncApplyDefault(t *testing.T) {
 
 	for i := range testPod.Spec.Containers {
 		container := testPod.Spec.Containers[i]
-		memory := testPod.Spec.Containers[i].Resources.Limits.Memory().String()
-		cpu := testPod.Spec.Containers[i].Resources.Limits.Cpu().String()
-		switch container.Image {
-		case "boo:V1":
-			if memory != "100Mi" {
-				t.Errorf("Unexpected memory value %s", memory)
-			}
-			if cpu != "50m" {
-				t.Errorf("Unexpected cpu value %s", cpu)
+		limitMemory := container.Resources.Limits.Memory().String()
+		limitCpu := container.Resources.Limits.Cpu().String()
+		requestMemory := container.Resources.Requests.Memory().String()
+		requestCpu := container.Resources.Requests.Cpu().String()
+
+		if limitMemory != "10Mi" {
+			t.Errorf("Unexpected memory value %s", limitMemory)
 		}
-		case "foo:V1":
-			if memory != "2Gi" {
-				t.Errorf("Unexpected memory value %s", memory)
+		if limitCpu != "75m" {
+			t.Errorf("Unexpected cpu value %s", limitCpu)
 		}
-			if cpu != "100m" {
-				t.Errorf("Unexpected cpu value %s", cpu)
+		if requestMemory != "5Mi" {
+			t.Errorf("Unexpected memory value %s", requestMemory)
 		}
+		if requestCpu != "50m" {
+			t.Errorf("Unexpected cpu value %s", requestCpu)
 		}
 	}
 }