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access.go
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access.go
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// Copyright (c) 2022 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 dependencywatchdog
import (
"context"
"fmt"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
"github.com/gardener/gardener/pkg/operation/botanist/component"
gutil "github.com/gardener/gardener/pkg/utils/gardener"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
secretutils "github.com/gardener/gardener/pkg/utils/secrets"
secretsmanager "github.com/gardener/gardener/pkg/utils/secrets/manager"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
clientcmdv1 "k8s.io/client-go/tools/clientcmd/api/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
// ExternalProbeSecretName is the name of the kubecfg secret with internal DNS for external access.
ExternalProbeSecretName = gutil.SecretNamePrefixShootAccess + "dependency-watchdog-external-probe"
// InternalProbeSecretName is the name of the kubecfg secret with cluster IP access.
InternalProbeSecretName = gutil.SecretNamePrefixShootAccess + "dependency-watchdog-internal-probe"
)
// NewAccess creates a new instance of the deployer for shoot cluster access for the dependency-watchdog.
func NewAccess(
client client.Client,
namespace string,
secretsManager secretsmanager.Interface,
values AccessValues,
) component.Deployer {
return &dependencyWatchdogAccess{
client: client,
namespace: namespace,
secretsManager: secretsManager,
values: values,
}
}
type dependencyWatchdogAccess struct {
client client.Client
namespace string
secretsManager secretsmanager.Interface
values AccessValues
}
// AccessValues contains configurations for the component.
type AccessValues struct {
// ServerOutOfCluster is the out-of-cluster address of a kube-apiserver.
ServerOutOfCluster string
// ServerInCluster is the in-cluster address of a kube-apiserver.
ServerInCluster string
}
func (d *dependencyWatchdogAccess) Deploy(ctx context.Context) error {
caSecret, found := d.secretsManager.Get(v1beta1constants.SecretNameCACluster)
if !found {
return fmt.Errorf("secret %q not found", v1beta1constants.SecretNameCACluster)
}
for name, server := range map[string]string{
InternalProbeSecretName: d.values.ServerInCluster,
ExternalProbeSecretName: d.values.ServerOutOfCluster,
} {
var (
shootAccessSecret = gutil.NewShootAccessSecret(name, d.namespace).WithNameOverride(name)
kubeconfig = kutil.NewKubeconfig(
d.namespace,
clientcmdv1.Cluster{Server: server, CertificateAuthorityData: caSecret.Data[secretutils.DataKeyCertificateBundle]},
clientcmdv1.AuthInfo{Token: ""},
)
)
if err := shootAccessSecret.WithKubeconfig(kubeconfig).Reconcile(ctx, d.client); err != nil {
return err
}
}
return nil
}
func (d *dependencyWatchdogAccess) Destroy(ctx context.Context) error {
return kutil.DeleteObjects(ctx, d.client,
&corev1.Secret{ObjectMeta: metav1.ObjectMeta{Name: InternalProbeSecretName, Namespace: d.namespace}},
&corev1.Secret{ObjectMeta: metav1.ObjectMeta{Name: ExternalProbeSecretName, Namespace: d.namespace}},
)
}