DRA: remove immediate allocation

As agreed in kubernetes/enhancements#4709, immediate
allocation is one of those features which can be removed because it makes no
sense for structured parameters and the justification for classic DRA is weak.

Kubernetes-commit: de5742ae83c8d77268a7caf5f3b1f418c4a13a84

Author: pohly

resource/v1alpha3/generated.pb.go

@@ -72,34 +72,8 @@ type ResourceClaimSpec struct {
 	// The object must be in the same namespace as the ResourceClaim.
 	// +optional
 	ParametersRef *ResourceClaimParametersReference `json:"parametersRef,omitempty" protobuf:"bytes,2,opt,name=parametersRef"`
-
-	// Allocation can start immediately or when a Pod wants to use the
-	// resource. "WaitForFirstConsumer" is the default.
-	// +optional
-	AllocationMode AllocationMode `json:"allocationMode,omitempty" protobuf:"bytes,3,opt,name=allocationMode"`
 }
 
-// AllocationMode describes whether a ResourceClaim gets allocated immediately
-// when it gets created (AllocationModeImmediate) or whether allocation is
-// delayed until it is needed for a Pod
-// (AllocationModeWaitForFirstConsumer). Other modes might get added in the
-// future.
-type AllocationMode string
-
-const (
-	// When a ResourceClaim has AllocationModeWaitForFirstConsumer, allocation is
-	// delayed until a Pod gets scheduled that needs the ResourceClaim. The
-	// scheduler will consider all resource requirements of that Pod and
-	// trigger allocation for a node that fits the Pod.
-	AllocationModeWaitForFirstConsumer AllocationMode = "WaitForFirstConsumer"
-
-	// When a ResourceClaim has AllocationModeImmediate, allocation starts
-	// as soon as the ResourceClaim gets created. This is done without
-	// considering the needs of Pods that will use the ResourceClaim
-	// because those Pods are not known yet.
-	AllocationModeImmediate AllocationMode = "Immediate"
-)
-
 // ResourceClaimStatus tracks whether the resource has been allocated and what
 // the resulting attributes are.
 type ResourceClaimStatus struct {

resource/v1alpha3/generated.proto

@@ -187,7 +187,6 @@ var map_ResourceClaimSpec = map[string]string{
 	"":                  "ResourceClaimSpec defines how a resource is to be allocated.",
 	"resourceClassName": "ResourceClassName references the driver and additional parameters via the name of a ResourceClass that was created as part of the driver deployment.",
 	"parametersRef":     "ParametersRef references a separate object with arbitrary parameters that will be used by the driver when allocating a resource for the claim.\n\nThe object must be in the same namespace as the ResourceClaim.",
-	"allocationMode":    "Allocation can start immediately or when a Pod wants to use the resource. \"WaitForFirstConsumer\" is the default.",
 }
 
 func (ResourceClaimSpec) SwaggerDoc() map[string]string {

resource/v1alpha3/types.go

@@ -49,8 +49,7 @@
       "apiGroup": "apiGroupValue",
       "kind": "kindValue",
       "name": "nameValue"
-    },
-    "allocationMode": "allocationModeValue"
+    }
   },
   "status": {
     "driverName": "driverNameValue",

resource/v1alpha3/types_swagger_doc_generated.go

@@ -33,7 +33,6 @@ metadata:
   selfLink: selfLinkValue
   uid: uidValue
 spec:
-  allocationMode: allocationModeValue
   parametersRef:
     apiGroup: apiGroupValue
     kind: kindValue

testdata/HEAD/resource.k8s.io.v1alpha3.ResourceClaim.json

@@ -92,8 +92,7 @@
         "apiGroup": "apiGroupValue",
         "kind": "kindValue",
         "name": "nameValue"
-      },
-      "allocationMode": "allocationModeValue"
+      }
     }
   }
 }

testdata/HEAD/resource.k8s.io.v1alpha3.ResourceClaim.pb

@@ -66,7 +66,6 @@ spec:
     selfLink: selfLinkValue
     uid: uidValue
   spec:
-    allocationMode: allocationModeValue
     parametersRef:
       apiGroup: apiGroupValue
       kind: kindValue