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resource_manager.go
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resource_manager.go
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// Copyright (c) 2021 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"
"time"
"github.com/gardener/gardener/charts"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
"github.com/gardener/gardener/pkg/client/kubernetes"
"github.com/gardener/gardener/pkg/operation/botanist/component"
"github.com/gardener/gardener/pkg/operation/botanist/component/resourcemanager"
"github.com/gardener/gardener/pkg/utils"
"github.com/gardener/gardener/pkg/utils/imagevector"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
"k8s.io/component-base/version"
"k8s.io/utils/pointer"
)
// DefaultResourceManager returns an instance of Gardener Resource Manager with defaults configured for being deployed in a Shoot namespace
func (b *Botanist) DefaultResourceManager() (resourcemanager.Interface, error) {
image, err := b.ImageVector.FindImage(charts.ImageNameGardenerResourceManager)
if err != nil {
return nil, err
}
repository, tag := image.String(), version.Get().GitVersion
if image.Tag != nil {
repository, tag = image.Repository, *image.Tag
}
image = &imagevector.Image{Repository: repository, Tag: &tag}
cfg := resourcemanager.Values{
AlwaysUpdate: pointer.Bool(true),
ClusterIdentity: b.Seed.GetInfo().Status.ClusterIdentity,
ConcurrentSyncs: pointer.Int32(20),
HealthSyncPeriod: utils.DurationPtr(time.Minute),
MaxConcurrentHealthWorkers: pointer.Int32(10),
MaxConcurrentTokenInvalidatorWorkers: pointer.Int32(5),
MaxConcurrentTokenRequestorWorkers: pointer.Int32(5),
MaxConcurrentRootCAPublisherWorkers: pointer.Int32(5),
TargetDiffersFromSourceCluster: true,
SyncPeriod: utils.DurationPtr(time.Minute),
TargetDisableCache: pointer.Bool(true),
WatchedNamespace: pointer.String(b.Shoot.SeedNamespace),
VPA: &resourcemanager.VPAConfig{
MinAllowed: corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("20m"),
corev1.ResourceMemory: resource.MustParse("30Mi"),
},
},
}
// ensure grm is present during hibernation (if the cluster is not hibernated yet) to reconcile any changes to
// MRs (e.g. caused by extension upgrades) that are necessary for completing the hibernation flow.
// grm is scaled down later on as part of the HibernateControlPlane step, so we only specify replicas=0 if
// the shoot is already hibernated.
replicas := int32(3)
if b.Shoot.HibernationEnabled && b.Shoot.GetInfo().Status.IsHibernated {
replicas = 0
}
return resourcemanager.New(
b.K8sSeedClient.Client(),
b.Shoot.SeedNamespace,
image.String(),
replicas,
cfg,
), nil
}
// DeployGardenerResourceManager deploys the gardener-resource-manager
func (b *Botanist) DeployGardenerResourceManager(ctx context.Context) error {
b.Shoot.Components.ControlPlane.ResourceManager.SetSecrets(resourcemanager.Secrets{
Kubeconfig: component.Secret{Name: resourcemanager.SecretName, Checksum: b.LoadCheckSum(resourcemanager.SecretName)},
ServerCA: component.Secret{Name: v1beta1constants.SecretNameCACluster, Checksum: b.LoadCheckSum(v1beta1constants.SecretNameCACluster), Data: b.LoadSecret(v1beta1constants.SecretNameCACluster).Data},
Server: component.Secret{Name: resourcemanager.SecretNameServer, Checksum: b.LoadCheckSum(resourcemanager.SecretNameServer)},
RootCA: &component.Secret{Name: v1beta1constants.SecretNameCACluster, Checksum: b.LoadCheckSum(v1beta1constants.SecretNameCACluster)},
})
return b.Shoot.Components.ControlPlane.ResourceManager.Deploy(ctx)
}
// ScaleGardenerResourceManagerToOne scales the gardener-resource-manager deployment
func (b *Botanist) ScaleGardenerResourceManagerToOne(ctx context.Context) error {
return kubernetes.ScaleDeployment(ctx, b.K8sSeedClient.Client(), kutil.Key(b.Shoot.SeedNamespace, v1beta1constants.DeploymentNameGardenerResourceManager), 1)
}