feat: add crd gen

Signed-off-by: runzexia <runzexia@yunify.com>

vendor/k8s.io/apiserver/pkg/registry/rest/delete.go

@@ -0,0 +1,137 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package rest
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/validation"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// RESTDeleteStrategy defines deletion behavior on an object that follows Kubernetes
+// API conventions.
+type RESTDeleteStrategy interface {
+	runtime.ObjectTyper
+}
+
+type GarbageCollectionPolicy string
+
+const (
+	DeleteDependents GarbageCollectionPolicy = "DeleteDependents"
+	OrphanDependents GarbageCollectionPolicy = "OrphanDependents"
+	// Unsupported means that the resource knows that it cannot be GC'd, so the finalizers
+	// should never be set in storage.
+	Unsupported GarbageCollectionPolicy = "Unsupported"
+)
+
+// GarbageCollectionDeleteStrategy must be implemented by the registry that wants to
+// orphan dependents by default.
+type GarbageCollectionDeleteStrategy interface {
+	// DefaultGarbageCollectionPolicy returns the default garbage collection behavior.
+	DefaultGarbageCollectionPolicy(ctx context.Context) GarbageCollectionPolicy
+}
+
+// RESTGracefulDeleteStrategy must be implemented by the registry that supports
+// graceful deletion.
+type RESTGracefulDeleteStrategy interface {
+	// CheckGracefulDelete should return true if the object can be gracefully deleted and set
+	// any default values on the DeleteOptions.
+	CheckGracefulDelete(ctx context.Context, obj runtime.Object, options *metav1.DeleteOptions) bool
+}
+
+// BeforeDelete tests whether the object can be gracefully deleted.
+// If graceful is set, the object should be gracefully deleted.  If gracefulPending
+// is set, the object has already been gracefully deleted (and the provided grace
+// period is longer than the time to deletion). An error is returned if the
+// condition cannot be checked or the gracePeriodSeconds is invalid. The options
+// argument may be updated with default values if graceful is true. Second place
+// where we set deletionTimestamp is pkg/registry/generic/registry/store.go.
+// This function is responsible for setting deletionTimestamp during gracefulDeletion,
+// other one for cascading deletions.
+func BeforeDelete(strategy RESTDeleteStrategy, ctx context.Context, obj runtime.Object, options *metav1.DeleteOptions) (graceful, gracefulPending bool, err error) {
+	objectMeta, gvk, kerr := objectMetaAndKind(strategy, obj)
+	if kerr != nil {
+		return false, false, kerr
+	}
+	if errs := validation.ValidateDeleteOptions(options); len(errs) > 0 {
+		return false, false, errors.NewInvalid(schema.GroupKind{Group: metav1.GroupName, Kind: "DeleteOptions"}, "", errs)
+	}
+	// Checking the Preconditions here to fail early. They'll be enforced later on when we actually do the deletion, too.
+	if options.Preconditions != nil && options.Preconditions.UID != nil && *options.Preconditions.UID != objectMeta.GetUID() {
+		return false, false, errors.NewConflict(schema.GroupResource{Group: gvk.Group, Resource: gvk.Kind}, objectMeta.GetName(), fmt.Errorf("the UID in the precondition (%s) does not match the UID in record (%s). The object might have been deleted and then recreated", *options.Preconditions.UID, objectMeta.GetUID()))
+	}
+	gracefulStrategy, ok := strategy.(RESTGracefulDeleteStrategy)
+	if !ok {
+		// If we're not deleting gracefully there's no point in updating Generation, as we won't update
+		// the obcject before deleting it.
+		return false, false, nil
+	}
+	// if the object is already being deleted, no need to update generation.
+	if objectMeta.GetDeletionTimestamp() != nil {
+		// if we are already being deleted, we may only shorten the deletion grace period
+		// this means the object was gracefully deleted previously but deletionGracePeriodSeconds was not set,
+		// so we force deletion immediately
+		// IMPORTANT:
+		// The deletion operation happens in two phases.
+		// 1. Update to set DeletionGracePeriodSeconds and DeletionTimestamp
+		// 2. Delete the object from storage.
+		// If the update succeeds, but the delete fails (network error, internal storage error, etc.),
+		// a resource was previously left in a state that was non-recoverable.  We
+		// check if the existing stored resource has a grace period as 0 and if so
+		// attempt to delete immediately in order to recover from this scenario.
+		if objectMeta.GetDeletionGracePeriodSeconds() == nil || *objectMeta.GetDeletionGracePeriodSeconds() == 0 {
+			return false, false, nil
+		}
+		// only a shorter grace period may be provided by a user
+		if options.GracePeriodSeconds != nil {
+			period := int64(*options.GracePeriodSeconds)
+			if period >= *objectMeta.GetDeletionGracePeriodSeconds() {
+				return false, true, nil
+			}
+			newDeletionTimestamp := metav1.NewTime(
+				objectMeta.GetDeletionTimestamp().Add(-time.Second * time.Duration(*objectMeta.GetDeletionGracePeriodSeconds())).
+					Add(time.Second * time.Duration(*options.GracePeriodSeconds)))
+			objectMeta.SetDeletionTimestamp(&newDeletionTimestamp)
+			objectMeta.SetDeletionGracePeriodSeconds(&period)
+			return true, false, nil
+		}
+		// graceful deletion is pending, do nothing
+		options.GracePeriodSeconds = objectMeta.GetDeletionGracePeriodSeconds()
+		return false, true, nil
+	}
+
+	if !gracefulStrategy.CheckGracefulDelete(ctx, obj, options) {
+		return false, false, nil
+	}
+	now := metav1.NewTime(metav1.Now().Add(time.Second * time.Duration(*options.GracePeriodSeconds)))
+	objectMeta.SetDeletionTimestamp(&now)
+	objectMeta.SetDeletionGracePeriodSeconds(options.GracePeriodSeconds)
+	// If it's the first graceful deletion we are going to set the DeletionTimestamp to non-nil.
+	// Controllers of the object that's being deleted shouldn't take any nontrivial actions, hence its behavior changes.
+	// Thus we need to bump object's Generation (if set). This handles generation bump during graceful deletion.
+	// The bump for objects that don't support graceful deletion is handled in pkg/registry/generic/registry/store.go.
+	if objectMeta.GetGeneration() > 0 {
+		objectMeta.SetGeneration(objectMeta.GetGeneration() + 1)
+	}
+	return true, false, nil
+}