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namespace.go
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namespace.go
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// Copyright (c) 2018 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 kubernetes
import (
"github.com/gardener/gardener/pkg/logger"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/equality"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/wait"
k8s "k8s.io/client-go/kubernetes"
"k8s.io/client-go/util/retry"
)
func tryUpdateNamespace(
k k8s.Interface,
backoff wait.Backoff,
meta metav1.ObjectMeta,
transform func(*corev1.Namespace) (*corev1.Namespace, error),
updateFunc func(k k8s.Interface, namespace *corev1.Namespace) (*corev1.Namespace, error),
exitEarlyFunc func(cur, updated *corev1.Namespace) bool,
) (*corev1.Namespace, error) {
var (
result *corev1.Namespace
attempt int
)
err := retry.RetryOnConflict(backoff, func() (err error) {
attempt++
cur, err := k.CoreV1().Namespaces().Get(meta.Name, metav1.GetOptions{})
if err != nil {
return err
}
updated, err := transform(cur.DeepCopy())
if err != nil {
return err
}
if exitEarlyFunc(cur, updated) {
result = cur
return nil
}
result, err = updateFunc(k, updated)
if err != nil {
logger.Logger.Errorf("Attempt %d failed to update Namespace %s due to %v", attempt, cur.Name, err)
}
return
})
if err != nil {
logger.Logger.Errorf("Failed to updated Namespace %s after %d attempts due to %v", meta.Name, attempt, err)
}
return result, err
}
// TryUpdateNamespace tries to update a namespace and retries the operation with the given <backoff>.
func TryUpdateNamespace(k k8s.Interface, backoff wait.Backoff, meta metav1.ObjectMeta, transform func(*corev1.Namespace) (*corev1.Namespace, error)) (*corev1.Namespace, error) {
return tryUpdateNamespace(k, backoff, meta, transform, func(k k8s.Interface, namespace *corev1.Namespace) (*corev1.Namespace, error) {
return k.CoreV1().Namespaces().Update(namespace)
}, func(cur, updated *corev1.Namespace) bool {
return equality.Semantic.DeepEqual(cur, updated)
})
}
// TryUpdateNamespaceLabels tries to update a namespace's labels and retries the operation with the given <backoff>.
func TryUpdateNamespaceLabels(k k8s.Interface, backoff wait.Backoff, meta metav1.ObjectMeta, transform func(*corev1.Namespace) (*corev1.Namespace, error)) (*corev1.Namespace, error) {
return tryUpdateNamespace(k, backoff, meta, transform, func(k k8s.Interface, namespace *corev1.Namespace) (*corev1.Namespace, error) {
return k.CoreV1().Namespaces().Update(namespace)
}, func(cur, updated *corev1.Namespace) bool {
return equality.Semantic.DeepEqual(cur.Labels, updated.Labels)
})
}