Merge pull request #26775 from piosz/generator

Automatic merge from submit-queue

Added hpa/v1 generator to kubectl autoscale

ref #21577

```release-note
New default horizontalpodautoscaler/v1 generator for kubectl autoscale.
Use autoscaling/v1 in kubectl by default.
```


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hack/test-cmd.sh

@@ -298,7 +298,7 @@ runTests() {
   image_field="(index .spec.containers 0).image"
   hpa_min_field=".spec.minReplicas"
   hpa_max_field=".spec.maxReplicas"
-  hpa_cpu_field=".spec.cpuUtilization.targetPercentage"
+  hpa_cpu_field=".spec.targetCPUUtilizationPercentage"
   job_parallelism_field=".spec.parallelism"
   deployment_replicas=".spec.replicas"
   secret_data=".data"
@@ -884,7 +884,7 @@ __EOF__
   [[ "$(kubectl get hpa.v1beta1.extensions frontend -o yaml "${kube_flags[@]}" | grep kubectl.kubernetes.io/last-applied-configuration)" ]]
   # Ensure we can interact with HPA objects in lists through both the extensions/v1beta1 and autoscaling/v1 APIs
   output_message=$(kubectl get hpa -o=jsonpath='{.items[0].apiVersion}' 2>&1 "${kube_flags[@]}")
-  kube::test::if_has_string "${output_message}" 'extensions/v1beta1'
+  kube::test::if_has_string "${output_message}" 'autoscaling/v1'
   output_message=$(kubectl get hpa.extensions -o=jsonpath='{.items[0].apiVersion}' 2>&1 "${kube_flags[@]}")
   kube::test::if_has_string "${output_message}" 'extensions/v1beta1'
   output_message=$(kubectl get hpa.autoscaling -o=jsonpath='{.items[0].apiVersion}' 2>&1 "${kube_flags[@]}")
@@ -1050,8 +1050,8 @@ __EOF__
   output_message=$(! kubectl autoscale --min=1 --max=2 -f hack/testdata/recursive/rc --recursive 2>&1 "${kube_flags[@]}")
   # Post-condition: busybox0 & busybox replication controllers are autoscaled
   # with min. of 1 replica & max of 2 replicas, and since busybox2 is malformed, it should error
-  kube::test::get_object_assert 'hpa busybox0' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '1 2 80'
+  kube::test::get_object_assert 'hpa busybox0' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '1 2 <no value>'
-  kube::test::get_object_assert 'hpa busybox1' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '1 2 80'
+  kube::test::get_object_assert 'hpa busybox1' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '1 2 <no value>'
   kube::test::if_has_string "${output_message}" "Object 'Kind' is missing"
   kubectl delete hpa busybox0 "${kube_flags[@]}"
   kubectl delete hpa busybox1 "${kube_flags[@]}"
@@ -1652,9 +1652,17 @@ __EOF__
   kubectl autoscale -f hack/testdata/frontend-controller.yaml "${kube_flags[@]}" --max=2 --cpu-percent=70
   kube::test::get_object_assert 'hpa frontend' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '1 2 70'
   kubectl delete hpa frontend "${kube_flags[@]}"
-  # autoscale 2~3 pods, default CPU utilization (80%), rc specified by name
+  # autoscale 1~2 pods, CPU utilization 70%, rc specified by file, using old generator
+  kubectl autoscale -f hack/testdata/frontend-controller.yaml "${kube_flags[@]}" --max=2 --cpu-percent=70 --generator=horizontalpodautoscaler/v1beta1
+  kube::test::get_object_assert 'hpa frontend' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '1 2 70'
+  kubectl delete hpa frontend "${kube_flags[@]}"
+  # autoscale 2~3 pods, no CPU utilization specified, rc specified by name
   kubectl autoscale rc frontend "${kube_flags[@]}" --min=2 --max=3
-  kube::test::get_object_assert 'hpa frontend' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '2 3 80'
+  kube::test::get_object_assert 'hpa frontend' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '2 3 <no value>'
+  kubectl delete hpa frontend "${kube_flags[@]}"
+  # autoscale 2~3 pods, no CPU utilization specified, rc specified by name, using old generator
+  kubectl autoscale rc frontend "${kube_flags[@]}" --min=2 --max=3 --generator=horizontalpodautoscaler/v1beta1
+  kube::test::get_object_assert 'hpa frontend' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '2 3 <no value>'
   kubectl delete hpa frontend "${kube_flags[@]}"
   # autoscale without specifying --max should fail
   ! kubectl autoscale rc frontend "${kube_flags[@]}"
@@ -1672,9 +1680,9 @@ __EOF__
   # Command
   kubectl create -f docs/user-guide/deployment.yaml "${kube_flags[@]}"
   kube::test::get_object_assert deployment "{{range.items}}{{$id_field}}:{{end}}" 'nginx-deployment:'
-  # autoscale 2~3 pods, default CPU utilization (80%)
+  # autoscale 2~3 pods, no CPU utilization specified
   kubectl-with-retry autoscale deployment nginx-deployment "${kube_flags[@]}" --min=2 --max=3
-  kube::test::get_object_assert 'hpa.extensions nginx-deployment' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '2 3 80'
+  kube::test::get_object_assert 'hpa nginx-deployment' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '2 3 <no value>'
   # Clean up
   # Note that we should delete hpa first, otherwise it may fight with the deployment reaper.
   kubectl delete hpa nginx-deployment "${kube_flags[@]}"
@@ -1849,9 +1857,9 @@ __EOF__
   kubectl autoscale -f hack/testdata/frontend-replicaset.yaml "${kube_flags[@]}" --max=2 --cpu-percent=70
   kube::test::get_object_assert 'hpa frontend' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '1 2 70'
   kubectl delete hpa frontend "${kube_flags[@]}"
-  # autoscale 2~3 pods, default CPU utilization (80%), replica set specified by name
+  # autoscale 2~3 pods, no CPU utilization specified, replica set specified by name
   kubectl autoscale rs frontend "${kube_flags[@]}" --min=2 --max=3
-  kube::test::get_object_assert 'hpa frontend' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '2 3 80'
+  kube::test::get_object_assert 'hpa frontend' "{{$hpa_min_field}} {{$hpa_max_field}} {{$hpa_cpu_field}}" '2 3 <no value>'
   kubectl delete hpa frontend "${kube_flags[@]}"
   # autoscale without specifying --max should fail
   ! kubectl autoscale rs frontend "${kube_flags[@]}"

pkg/kubectl/autoscale.go

@@ -25,10 +25,6 @@ import (
 	"k8s.io/kubernetes/pkg/runtime"
 )
 
-const (
-	scaleSubResource = "scale"
-)
-
 type HorizontalPodAutoscalerV1Beta1 struct{}
 
 func (HorizontalPodAutoscalerV1Beta1) ParamNames() []GeneratorParam {
@@ -46,6 +42,29 @@ func (HorizontalPodAutoscalerV1Beta1) ParamNames() []GeneratorParam {
 }
 
 func (HorizontalPodAutoscalerV1Beta1) Generate(genericParams map[string]interface{}) (runtime.Object, error) {
+	return generateHPA(genericParams)
+}
+
+type HorizontalPodAutoscalerV1 struct{}
+
+func (HorizontalPodAutoscalerV1) ParamNames() []GeneratorParam {
+	return []GeneratorParam{
+		{"default-name", true},
+		{"name", false},
+		{"scaleRef-kind", false},
+		{"scaleRef-name", false},
+		{"scaleRef-apiVersion", false},
+		{"min", false},
+		{"max", true},
+		{"cpu-percent", false},
+	}
+}
+
+func (HorizontalPodAutoscalerV1) Generate(genericParams map[string]interface{}) (runtime.Object, error) {
+	return generateHPA(genericParams)
+}
+
+func generateHPA(genericParams map[string]interface{}) (runtime.Object, error) {
 	params := map[string]string{}
 	for key, value := range genericParams {
 		strVal, isString := value.(string)

pkg/kubectl/cmd/autoscale.go

@@ -41,7 +41,7 @@ const (
 Looks up a Deployment, ReplicaSet, or ReplicationController by name and creates an autoscaler that uses the given resource as a reference.
 An autoscaler can automatically increase or decrease number of pods deployed within the system as needed.`
 
-	autoscaleExample = `# Auto scale a deployment "foo", with the number of pods between 2 to 10, target CPU utilization at a default value that server applies:
+	autoscaleExample = `# Auto scale a deployment "foo", with the number of pods between 2 to 10, no target CPU utilization specfied so a default autoscaling policy will be used:
 kubectl autoscale deployment foo --min=2 --max=10
 
 # Auto scale a replication controller "foo", with the number of pods between 1 to 5, target CPU utilization at 80%:
@@ -62,11 +62,11 @@ func NewCmdAutoscale(f *cmdutil.Factory, out io.Writer) *cobra.Command {
 		},
 	}
 	cmdutil.AddPrinterFlags(cmd)
-	cmd.Flags().String("generator", "horizontalpodautoscaler/v1beta1", "The name of the API generator to use. Currently there is only 1 generator.")
+	cmd.Flags().String("generator", "horizontalpodautoscaler/v1", "The name of the API generator to use. Currently there is only 1 generator.")
 	cmd.Flags().Int("min", -1, "The lower limit for the number of pods that can be set by the autoscaler. If it's not specified or negative, the server will apply a default value.")
 	cmd.Flags().Int("max", -1, "The upper limit for the number of pods that can be set by the autoscaler. Required.")
 	cmd.MarkFlagRequired("max")
-	cmd.Flags().Int("cpu-percent", -1, fmt.Sprintf("The target average CPU utilization (represented as a percent of requested CPU) over all the pods. If it's not specified or negative, the server will apply a default value."))
+	cmd.Flags().Int("cpu-percent", -1, fmt.Sprintf("The target average CPU utilization (represented as a percent of requested CPU) over all the pods. If it's not specified or negative, a default autoscaling policy will be used."))
 	cmd.Flags().String("name", "", "The name for the newly created object. If not specified, the name of the input resource will be used.")
 	cmdutil.AddDryRunFlag(cmd)
 	usage := "Filename, directory, or URL to a file identifying the resource to autoscale."

pkg/kubectl/cmd/util/factory.go

@@ -159,6 +159,7 @@ const (
 	ServiceV2GeneratorName                      = "service/v2"
 	ServiceAccountV1GeneratorName               = "serviceaccount/v1"
 	HorizontalPodAutoscalerV1Beta1GeneratorName = "horizontalpodautoscaler/v1beta1"
+	HorizontalPodAutoscalerV1GeneratorName      = "horizontalpodautoscaler/v1"
 	DeploymentV1Beta1GeneratorName              = "deployment/v1beta1"
 	JobV1Beta1GeneratorName                     = "job/v1beta1"
 	JobV1GeneratorName                          = "job/v1"
@@ -185,6 +186,7 @@ func DefaultGenerators(cmdName string) map[string]kubectl.Generator {
 	}
 	generators["autoscale"] = map[string]kubectl.Generator{
 		HorizontalPodAutoscalerV1Beta1GeneratorName: kubectl.HorizontalPodAutoscalerV1Beta1{},
+		HorizontalPodAutoscalerV1GeneratorName:      kubectl.HorizontalPodAutoscalerV1{},
 	}
 	generators["namespace"] = map[string]kubectl.Generator{
 		NamespaceV1GeneratorName: kubectl.NamespaceGeneratorV1{},
@@ -317,11 +319,13 @@ func NewFactory(optionalClientConfig clientcmd.ClientConfig) *Factory {
 				Delegate: outputRESTMapper,
 				ResourcePriority: []unversioned.GroupVersionResource{
 					{Group: api.GroupName, Version: meta.AnyVersion, Resource: meta.AnyResource},
+					{Group: autoscaling.GroupName, Version: meta.AnyVersion, Resource: meta.AnyResource},
 					{Group: extensions.GroupName, Version: meta.AnyVersion, Resource: meta.AnyResource},
 					{Group: federation.GroupName, Version: meta.AnyVersion, Resource: meta.AnyResource},
 				},
 				KindPriority: []unversioned.GroupVersionKind{
 					{Group: api.GroupName, Version: meta.AnyVersion, Kind: meta.AnyKind},
+					{Group: autoscaling.GroupName, Version: meta.AnyVersion, Kind: meta.AnyKind},
 					{Group: extensions.GroupName, Version: meta.AnyVersion, Kind: meta.AnyKind},
 					{Group: federation.GroupName, Version: meta.AnyVersion, Kind: meta.AnyKind},
 				},