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resources.go
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resources.go
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// Copyright (c) 2020 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 botanist
import (
"context"
"fmt"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
unstructuredutils "github.com/gardener/gardener/pkg/utils/kubernetes/unstructured"
"github.com/gardener/gardener/pkg/utils/managedresources"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
// ManagedResourceName is the name of the managed resource used to deploy referenced resources to the Seed cluster.
ManagedResourceName = "referenced-resources"
)
// DeployReferencedResources reads all referenced resources from the Garden cluster and writes a managed resource to the Seed cluster.
func (b *Botanist) DeployReferencedResources(ctx context.Context) error {
// Read referenced objects into a slice of unstructured objects
var unstructuredObjs []*unstructured.Unstructured
for _, resource := range b.Shoot.GetInfo().Spec.Resources {
// Read the resource from the Garden cluster
obj, err := unstructuredutils.GetObjectByRef(ctx, b.K8sGardenClient.Client(), &resource.ResourceRef, b.Shoot.GetInfo().Namespace)
if err != nil {
return err
}
if obj == nil {
return fmt.Errorf("object not found %v", resource.ResourceRef)
}
obj = unstructuredutils.FilterMetadata(obj, "finalizers")
// Create an unstructured object and append it to the slice
unstructuredObj := &unstructured.Unstructured{Object: obj}
unstructuredObj.SetNamespace(b.Shoot.SeedNamespace)
unstructuredObj.SetName(v1beta1constants.ReferencedResourcesPrefix + unstructuredObj.GetName())
unstructuredObjs = append(unstructuredObjs, unstructuredObj)
}
// Create managed resource from the slice of unstructured objects
return managedresources.CreateFromUnstructured(ctx, b.K8sSeedClient.Client(), b.Shoot.SeedNamespace, ManagedResourceName,
false, v1beta1constants.SeedResourceManagerClass, unstructuredObjs, false, nil)
}
// DestroyReferencedResources deletes the managed resource containing referenced resources from the Seed cluster.
func (b *Botanist) DestroyReferencedResources(ctx context.Context) error {
return client.IgnoreNotFound(managedresources.Delete(ctx, b.K8sSeedClient.Client(), b.Shoot.SeedNamespace, ManagedResourceName, false))
}