103 lines
3.2 KiB
Go
103 lines
3.2 KiB
Go
/*
|
|
Copyright 2020 The Karmada 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 util
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
|
|
corev1 "k8s.io/api/core/v1"
|
|
apierrors "k8s.io/apimachinery/pkg/api/errors"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
kubeclient "k8s.io/client-go/kubernetes"
|
|
)
|
|
|
|
// IsNamespaceExist tells if the namespace already exists.
|
|
func IsNamespaceExist(client kubeclient.Interface, namespace string) (bool, error) {
|
|
_, err := client.CoreV1().Namespaces().Get(context.Background(), namespace, metav1.GetOptions{})
|
|
if err != nil {
|
|
if apierrors.IsNotFound(err) {
|
|
return false, nil
|
|
}
|
|
|
|
return false, err
|
|
}
|
|
|
|
return true, nil
|
|
}
|
|
|
|
// CreateNamespace just try to create the namespace.
|
|
func CreateNamespace(client kubeclient.Interface, namespaceObj *corev1.Namespace) (*corev1.Namespace, error) {
|
|
_, err := client.CoreV1().Namespaces().Create(context.TODO(), namespaceObj, metav1.CreateOptions{})
|
|
if err != nil {
|
|
if apierrors.IsAlreadyExists(err) {
|
|
return namespaceObj, nil
|
|
}
|
|
|
|
return nil, err
|
|
}
|
|
|
|
return namespaceObj, nil
|
|
}
|
|
|
|
// DeleteNamespace just try to delete the namespace.
|
|
func DeleteNamespace(client kubeclient.Interface, namespace string) error {
|
|
err := client.CoreV1().Namespaces().Delete(context.Background(), namespace, metav1.DeleteOptions{})
|
|
if err != nil && !apierrors.IsNotFound(err) {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// EnsureNamespaceExist makes sure that the specific namespace exist in cluster.
|
|
// If namespace not exit, just create it.
|
|
func EnsureNamespaceExist(client kubeclient.Interface, namespace string, dryRun bool) (*corev1.Namespace, error) {
|
|
return EnsureNamespaceExistWithLabels(client, namespace, dryRun, nil)
|
|
}
|
|
|
|
// EnsureNamespaceExistWithLabels makes sure that the specific namespace exist in cluster.
|
|
// If namespace not exit, just create it with specific labels.
|
|
func EnsureNamespaceExistWithLabels(client kubeclient.Interface, namespace string, dryRun bool, labels map[string]string) (*corev1.Namespace, error) {
|
|
namespaceObj := &corev1.Namespace{}
|
|
namespaceObj.Name = namespace
|
|
// Set labels for namespace.
|
|
if labels != nil {
|
|
namespaceObj.Labels = labels
|
|
}
|
|
|
|
if dryRun {
|
|
return namespaceObj, nil
|
|
}
|
|
|
|
// It's necessary to check if a namespace exists before creating it.
|
|
// Sometimes the namespace is created in advance, to give less privilege to Karmada.
|
|
exist, err := IsNamespaceExist(client, namespace)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to check if namespace exist. namespace: %s, error: %v", namespace, err)
|
|
}
|
|
if exist {
|
|
return namespaceObj, nil
|
|
}
|
|
|
|
createdObj, err := CreateNamespace(client, namespaceObj)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("ensure namespace failed due to create failed. namespace: %s, error: %v", namespace, err)
|
|
}
|
|
|
|
return createdObj, nil
|
|
}
|