/
shootclient.go
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/
shootclient.go
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// Copyright 2022 SAP SE or an SAP affiliate company
//
// 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 prober
import (
"context"
"fmt"
"time"
"github.com/gardener/dependency-watchdog/internal/util"
"github.com/go-logr/logr"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/client-go/kubernetes"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// ShootClientCreator provides a facade to create kubernetes client targeting a shoot.
type ShootClientCreator interface {
// CreateClient creates a new clientSet to connect to the Kube ApiServer running in the passed-in shoot control namespace.
CreateClient(ctx context.Context, logger logr.Logger, namespace string, secretName string, connectionTimeout time.Duration) (kubernetes.Interface, error)
}
// NewShootClientCreator creates an instance of ShootClientCreator.
func NewShootClientCreator(client client.Client) ShootClientCreator {
return &shootClientCreator{client}
}
type shootClientCreator struct {
client.Client
}
func (s *shootClientCreator) CreateClient(ctx context.Context, logger logr.Logger, namespace string, secretName string, connectionTimeout time.Duration) (kubernetes.Interface, error) {
operation := fmt.Sprintf("get-secret-%s-for-namespace-%s", secretName, namespace)
retryResult := util.Retry(ctx, logger,
operation,
func() ([]byte, error) {
return util.GetKubeConfigFromSecret(ctx, namespace, secretName, s.Client, logger)
},
defaultGetSecretMaxAttempts,
defaultGetSecretBackoff,
canRetrySecretGet)
if retryResult.Err != nil {
return nil, retryResult.Err
}
return util.CreateClientFromKubeConfigBytes(retryResult.Value, connectionTimeout)
}
func canRetrySecretGet(err error) bool {
return !apierrors.IsNotFound(err)
}