1 /* 2 Copyright 2014 The Kubernetes 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 admit 18 19 import ( 20 "context" 21 "io" 22 23 "k8s.io/apiserver/pkg/admission" 24 "k8s.io/klog/v2" 25 ) 26 27 // PluginName indicates name of admission plugin. 28 const PluginName = "AlwaysAdmit" 29 30 // Register registers a plugin 31 func Register(plugins *admission.Plugins) { 32 plugins.Register(PluginName, func(config io.Reader) (admission.Interface, error) { 33 return NewAlwaysAdmit(), nil 34 }) 35 } 36 37 // alwaysAdmit is an implementation of admission.Interface which always says yes to an admit request. 38 type alwaysAdmit struct{} 39 40 var _ admission.MutationInterface = alwaysAdmit{} 41 var _ admission.ValidationInterface = alwaysAdmit{} 42 43 // Admit makes an admission decision based on the request attributes 44 func (alwaysAdmit) Admit(ctx context.Context, a admission.Attributes, o admission.ObjectInterfaces) (err error) { 45 return nil 46 } 47 48 // Validate makes an admission decision based on the request attributes. It is NOT allowed to mutate. 49 func (alwaysAdmit) Validate(ctx context.Context, a admission.Attributes, o admission.ObjectInterfaces) (err error) { 50 return nil 51 } 52 53 // Handles returns true if this admission controller can handle the given operation 54 // where operation can be one of CREATE, UPDATE, DELETE, or CONNECT 55 func (alwaysAdmit) Handles(operation admission.Operation) bool { 56 return true 57 } 58 59 // NewAlwaysAdmit creates a new always admit admission handler 60 func NewAlwaysAdmit() admission.Interface { 61 // DEPRECATED: AlwaysAdmit admit all admission request, it is no use. 62 klog.Warningf("%s admission controller is deprecated. "+ 63 "Please remove this controller from your configuration files and scripts.", PluginName) 64 return new(alwaysAdmit) 65 } 66