github.com/sdbaiguanghe/helm@v2.16.7+incompatible/pkg/kube/namespace.go (about) 1 /* 2 Copyright The Helm Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package kube // import "k8s.io/helm/pkg/kube" 18 19 import ( 20 "k8s.io/api/core/v1" 21 "k8s.io/apimachinery/pkg/api/errors" 22 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 23 "k8s.io/client-go/kubernetes" 24 ) 25 26 func createNamespace(client kubernetes.Interface, namespace string) error { 27 ns := &v1.Namespace{ 28 ObjectMeta: metav1.ObjectMeta{ 29 Name: namespace, 30 Labels: map[string]string{ 31 "name": namespace, 32 }, 33 }, 34 } 35 _, err := client.CoreV1().Namespaces().Create(ns) 36 return err 37 } 38 39 func getNamespace(client kubernetes.Interface, namespace string) (*v1.Namespace, error) { 40 return client.CoreV1().Namespaces().Get(namespace, metav1.GetOptions{}) 41 } 42 43 func ensureNamespace(client kubernetes.Interface, namespace string) error { 44 _, err := getNamespace(client, namespace) 45 if err != nil && errors.IsNotFound(err) { 46 err = createNamespace(client, namespace) 47 48 // If multiple commands which run `ensureNamespace` are run in 49 // parallel, then protect against the race condition in which 50 // the namespace did not exist when `getNamespace` was executed, 51 // but did exist when `createNamespace` was executed. If that 52 // happens, we can just proceed as normal. 53 if errors.IsAlreadyExists(err) { 54 return nil 55 } 56 } 57 return err 58 }