forked from gardener-attic/gardener-extensions
/
cluster.go
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/
cluster.go
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// Copyright (c) 2019 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 controller
import (
"context"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
gardenv1beta1 "github.com/gardener/gardener/pkg/apis/garden/v1beta1"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// Cluster contains the decoded resources of Gardener's extension Cluster resource.
// TODO: Change from `gardenv1beta1` to `gardencorev1alpha1` once we have moved the resources there.
type Cluster struct {
CloudProfile *gardenv1beta1.CloudProfile
Seed *gardenv1beta1.Seed
Shoot *gardenv1beta1.Shoot
}
// GetCluster tries to read Gardener's Cluster extension resource in the given namespace.
func GetCluster(ctx context.Context, c client.Client, namespace string) (*Cluster, error) {
cluster := &extensionsv1alpha1.Cluster{}
if err := c.Get(ctx, kutil.Key(namespace), cluster); err != nil {
return nil, err
}
cloudProfile, err := CloudProfileFromCluster(cluster)
if err != nil {
return nil, err
}
seed, err := SeedFromCluster(cluster)
if err != nil {
return nil, err
}
shoot, err := ShootFromCluster(cluster)
if err != nil {
return nil, err
}
return &Cluster{cloudProfile, seed, shoot}, nil
}
// CloudProfileFromCluster returns the CloudProfile resource inside the Cluster resource.
func CloudProfileFromCluster(cluster *extensionsv1alpha1.Cluster) (*gardenv1beta1.CloudProfile, error) {
decoder, err := newGardenDecoder()
if err != nil {
return nil, err
}
cloudProfile := &gardenv1beta1.CloudProfile{}
_, _, err = decoder.Decode(cluster.Spec.CloudProfile.Raw, nil, cloudProfile)
return cloudProfile, err
}
// SeedFromCluster returns the Seed resource inside the Cluster resource.
func SeedFromCluster(cluster *extensionsv1alpha1.Cluster) (*gardenv1beta1.Seed, error) {
decoder, err := newGardenDecoder()
if err != nil {
return nil, err
}
seed := &gardenv1beta1.Seed{}
_, _, err = decoder.Decode(cluster.Spec.Seed.Raw, nil, seed)
return seed, err
}
// ShootFromCluster returns the Shoot resource inside the Cluster resource.
func ShootFromCluster(cluster *extensionsv1alpha1.Cluster) (*gardenv1beta1.Shoot, error) {
decoder, err := newGardenDecoder()
if err != nil {
return nil, err
}
shoot := &gardenv1beta1.Shoot{}
_, _, err = decoder.Decode(cluster.Spec.Shoot.Raw, nil, shoot)
return shoot, err
}
func newGardenDecoder() (runtime.Decoder, error) {
scheme := runtime.NewScheme()
decoder := serializer.NewCodecFactory(scheme).UniversalDecoder()
return decoder, gardenv1beta1.AddToScheme(scheme)
}