Update generated files

update generated protobufs

swagger docs are regenerated

update openapi-spec

update generated openapi

api/openapi-spec/swagger.json

@@ -4548,7 +4548,7 @@
           "type": "integer"
         },
         "minReplicas": {
-          "description": "lower limit for the number of pods that can be set by the autoscaler, default 1.",
+          "description": "minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the alpha feature gate HPAScaleToZero is enabled and at least one Object or External metric is configured.  Scaling is active as long as at least one metric value is available.",
           "format": "int32",
           "type": "integer"
         },
@@ -4851,7 +4851,7 @@
           "type": "array"
         },
         "minReplicas": {
-          "description": "minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down. It defaults to 1 pod.",
+          "description": "minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the alpha feature gate HPAScaleToZero is enabled and at least one Object or External metric is configured.  Scaling is active as long as at least one metric value is available.",
           "format": "int32",
           "type": "integer"
         },
@@ -5291,7 +5291,7 @@
           "type": "array"
         },
         "minReplicas": {
-          "description": "minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down. It defaults to 1 pod.",
+          "description": "minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the alpha feature gate HPAScaleToZero is enabled and at least one Object or External metric is configured.  Scaling is active as long as at least one metric value is available.",
           "format": "int32",
           "type": "integer"
         },

pkg/apis/autoscaling/validation/BUILD

@@ -13,10 +13,12 @@ go_library(
     deps = [
         "//pkg/apis/autoscaling:go_default_library",
         "//pkg/apis/core/validation:go_default_library",
+        "//pkg/features:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/api/validation:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/api/validation/path:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/sets:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/validation/field:go_default_library",
+        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
     ],
 )
 
@@ -27,8 +29,11 @@ go_test(
     deps = [
         "//pkg/apis/autoscaling:go_default_library",
         "//pkg/apis/core:go_default_library",
+        "//pkg/features:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/api/resource:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
+        "//staging/src/k8s.io/component-base/featuregate/testing:go_default_library",
         "//vendor/k8s.io/utils/pointer:go_default_library",
     ],
 )

staging/src/k8s.io/api/autoscaling/v1/generated.proto

@@ -141,7 +141,11 @@ message HorizontalPodAutoscalerSpec {
   // and will set the desired number of pods by using its Scale subresource.
   optional CrossVersionObjectReference scaleTargetRef = 1;
 
-  // lower limit for the number of pods that can be set by the autoscaler, default 1.
+  // minReplicas is the lower limit for the number of replicas to which the autoscaler
+  // can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the
+  // alpha feature gate HPAScaleToZero is enabled and at least one Object or External
+  // metric is configured.  Scaling is active as long as at least one metric value is
+  // available.
   // +optional
   optional int32 minReplicas = 2;
 

staging/src/k8s.io/api/autoscaling/v1/types_swagger_doc_generated.go

@@ -99,7 +99,7 @@ func (HorizontalPodAutoscalerList) SwaggerDoc() map[string]string {
 var map_HorizontalPodAutoscalerSpec = map[string]string{
 	"":                               "specification of a horizontal pod autoscaler.",
 	"scaleTargetRef":                 "reference to scaled resource; horizontal pod autoscaler will learn the current resource consumption and will set the desired number of pods by using its Scale subresource.",
-	"minReplicas":                    "lower limit for the number of pods that can be set by the autoscaler, default 1.",
+	"minReplicas":                    "minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the alpha feature gate HPAScaleToZero is enabled and at least one Object or External metric is configured.  Scaling is active as long as at least one metric value is available.",
 	"maxReplicas":                    "upper limit for the number of pods that can be set by the autoscaler; cannot be smaller than MinReplicas.",
 	"targetCPUUtilizationPercentage": "target average CPU utilization (represented as a percentage of requested CPU) over all the pods; if not specified the default autoscaling policy will be used.",
 }

staging/src/k8s.io/api/autoscaling/v2beta1/generated.proto

@@ -146,8 +146,11 @@ message HorizontalPodAutoscalerSpec {
   // should be collected, as well as to actually change the replica count.
   optional CrossVersionObjectReference scaleTargetRef = 1;
 
-  // minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down.
+  // minReplicas is the lower limit for the number of replicas to which the autoscaler
-  // It defaults to 1 pod.
+  // can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the
+  // alpha feature gate HPAScaleToZero is enabled and at least one Object or External
+  // metric is configured.  Scaling is active as long as at least one metric value is
+  // available.
   // +optional
   optional int32 minReplicas = 2;
 

staging/src/k8s.io/api/autoscaling/v2beta1/types_swagger_doc_generated.go

@@ -99,7 +99,7 @@ func (HorizontalPodAutoscalerList) SwaggerDoc() map[string]string {
 var map_HorizontalPodAutoscalerSpec = map[string]string{
 	"":               "HorizontalPodAutoscalerSpec describes the desired functionality of the HorizontalPodAutoscaler.",
 	"scaleTargetRef": "scaleTargetRef points to the target resource to scale, and is used to the pods for which metrics should be collected, as well as to actually change the replica count.",
-	"minReplicas":    "minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down. It defaults to 1 pod.",
+	"minReplicas":    "minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the alpha feature gate HPAScaleToZero is enabled and at least one Object or External metric is configured.  Scaling is active as long as at least one metric value is available.",
 	"maxReplicas":    "maxReplicas is the upper limit for the number of replicas to which the autoscaler can scale up. It cannot be less that minReplicas.",
 	"metrics":        "metrics contains the specifications for which to use to calculate the desired replica count (the maximum replica count across all metrics will be used).  The desired replica count is calculated multiplying the ratio between the target value and the current value by the current number of pods.  Ergo, metrics used must decrease as the pod count is increased, and vice-versa.  See the individual metric source types for more information about how each type of metric must respond.",
 }

staging/src/k8s.io/api/autoscaling/v2beta2/generated.proto

@@ -123,8 +123,11 @@ message HorizontalPodAutoscalerSpec {
   // should be collected, as well as to actually change the replica count.
   optional CrossVersionObjectReference scaleTargetRef = 1;
 
-  // minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down.
+  // minReplicas is the lower limit for the number of replicas to which the autoscaler
-  // It defaults to 1 pod.
+  // can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the
+  // alpha feature gate HPAScaleToZero is enabled and at least one Object or External
+  // metric is configured.  Scaling is active as long as at least one metric value is
+  // available.
   // +optional
   optional int32 minReplicas = 2;
 

staging/src/k8s.io/api/autoscaling/v2beta2/types_swagger_doc_generated.go

@@ -95,7 +95,7 @@ func (HorizontalPodAutoscalerList) SwaggerDoc() map[string]string {
 var map_HorizontalPodAutoscalerSpec = map[string]string{
 	"":               "HorizontalPodAutoscalerSpec describes the desired functionality of the HorizontalPodAutoscaler.",
 	"scaleTargetRef": "scaleTargetRef points to the target resource to scale, and is used to the pods for which metrics should be collected, as well as to actually change the replica count.",
-	"minReplicas":    "minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down. It defaults to 1 pod.",
+	"minReplicas":    "minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the alpha feature gate HPAScaleToZero is enabled and at least one Object or External metric is configured.  Scaling is active as long as at least one metric value is available.",
 	"maxReplicas":    "maxReplicas is the upper limit for the number of replicas to which the autoscaler can scale up. It cannot be less that minReplicas.",
 	"metrics":        "metrics contains the specifications for which to use to calculate the desired replica count (the maximum replica count across all metrics will be used).  The desired replica count is calculated multiplying the ratio between the target value and the current value by the current number of pods.  Ergo, metrics used must decrease as the pod count is increased, and vice-versa.  See the individual metric source types for more information about how each type of metric must respond. If not set, the default metric will be set to 80% average CPU utilization.",
 }

staging/src/k8s.io/apiextensions-apiserver/pkg/generated/openapi/zz_generated.openapi.go

@@ -377,7 +377,7 @@ func schema_k8sio_api_autoscaling_v1_HorizontalPodAutoscalerSpec(ref common.Refe
 					},
 					"minReplicas": {
 						SchemaProps: spec.SchemaProps{
-							Description: "lower limit for the number of pods that can be set by the autoscaler, default 1.",
+							Description: "minReplicas is the lower limit for the number of replicas to which the autoscaler can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the alpha feature gate HPAScaleToZero is enabled and at least one Object or External metric is configured.  Scaling is active as long as at least one metric value is available.",
 							Type:        []string{"integer"},
 							Format:      "int32",
 						},