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seed.go
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seed.go
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// Copyright 2018 The Gardener 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 seed
import (
"fmt"
"path/filepath"
gardenv1beta1 "github.com/gardener/gardener/pkg/apis/garden/v1beta1"
"github.com/gardener/gardener/pkg/apis/garden/v1beta1/helper"
"github.com/gardener/gardener/pkg/chartrenderer"
gardeninformers "github.com/gardener/gardener/pkg/client/garden/informers/externalversions/garden/v1beta1"
"github.com/gardener/gardener/pkg/client/kubernetes"
"github.com/gardener/gardener/pkg/logger"
"github.com/gardener/gardener/pkg/operation/common"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
)
// New takes a <k8sGardenClient>, the <k8sGardenInformers> and a <seed> manifest, and creates a new Seed representation.
// It will add the CloudProfile and identify the cloud provider.
func New(k8sGardenClient kubernetes.Client, k8sGardenInformers gardeninformers.Interface, seed *gardenv1beta1.Seed) (*Seed, error) {
secret, err := k8sGardenClient.GetSecret(seed.Spec.SecretRef.Namespace, seed.Spec.SecretRef.Name)
if err != nil {
return nil, err
}
cloudProfile, err := k8sGardenInformers.CloudProfiles().Lister().Get(seed.Spec.Cloud.Profile)
if err != nil {
return nil, err
}
seedObj := &Seed{
Info: seed,
Secret: secret,
CloudProfile: cloudProfile,
}
cloudProvider, err := helper.DetermineCloudProviderInProfile(cloudProfile.Spec)
if err != nil {
return nil, err
}
seedObj.CloudProvider = cloudProvider
return seedObj, nil
}
// NewFromName creates a new Seed object based on the name of a Seed manifest.
func NewFromName(k8sGardenClient kubernetes.Client, k8sGardenInformers gardeninformers.Interface, seedName string) (*Seed, error) {
seed, err := k8sGardenInformers.Seeds().Lister().Get(seedName)
if err != nil {
return nil, err
}
return New(k8sGardenClient, k8sGardenInformers, seed)
}
// List returns a list of Seed clusters (along with the referenced secrets).
func List(k8sGardenClient kubernetes.Client, k8sGardenInformers gardeninformers.Interface) ([]*Seed, error) {
var seedList []*Seed
list, err := k8sGardenInformers.Seeds().Lister().List(labels.Everything())
if err != nil {
return nil, err
}
for _, obj := range list {
seed, err := New(k8sGardenClient, k8sGardenInformers, obj)
if err != nil {
return nil, err
}
seedList = append(seedList, seed)
}
return seedList, nil
}
// BootstrapClusters bootstraps the Seeds cluster and deploys various required manifests.
func BootstrapClusters(k8sGardenClient kubernetes.Client, k8sGardenInformers gardeninformers.Interface, secrets map[string]*corev1.Secret) error {
const chartName = "seed-bootstrap"
seedList, err := List(k8sGardenClient, k8sGardenInformers)
if err != nil {
return err
}
for _, seed := range seedList {
logger.Logger.Infof("Bootstrapping Seed cluster %s...", seed.Info.Name)
k8sSeedClient, err := kubernetes.NewClientFromSecretObject(seed.Secret)
if err != nil {
return err
}
if err := common.ApplyChart(
k8sSeedClient,
chartrenderer.New(k8sSeedClient),
filepath.Join("charts", chartName),
chartName,
metav1.NamespaceSystem,
nil,
map[string]interface{}{
"CloudProvider": seed.CloudProvider,
},
); err != nil {
return err
}
err = common.EnsureImagePullSecrets(k8sSeedClient, metav1.NamespaceSystem, secrets, true, nil)
if err != nil {
return err
}
}
return nil
}
// GetIngressFQDN returns the fully qualified domain name of ingress sub-resource for the Seed cluster. The
// end result is '<subDomain>.<shoot-name>.<garden-namespace>.ingress.<seed-fqdn>'. It must not exceed 64
// characters in length (see RFC-5280 for details).
func (s *Seed) GetIngressFQDN(subDomain, shootName, shootNamespace string) (string, error) {
result := fmt.Sprintf("%s.%s.%s.ingress.%s", subDomain, shootName, shootNamespace, s.Info.Spec.Domain)
if len(result) > 64 {
return "", fmt.Errorf("the FQDN for '%s' cannot be longer than 64 characters", result)
}
return result, nil
}