| /* |
| Copyright 2017 The Kubernetes 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 config |
| |
| import ( |
| "fmt" |
| "io" |
| "io/ioutil" |
| "path" |
| |
| "k8s.io/apimachinery/pkg/runtime" |
| "k8s.io/apimachinery/pkg/runtime/serializer" |
| utilruntime "k8s.io/apimachinery/pkg/util/runtime" |
| "k8s.io/apimachinery/pkg/util/validation/field" |
| "k8s.io/apiserver/pkg/admission/plugin/webhook/config/apis/webhookadmission" |
| "k8s.io/apiserver/pkg/admission/plugin/webhook/config/apis/webhookadmission/v1alpha1" |
| ) |
| |
| var ( |
| scheme = runtime.NewScheme() |
| codecs = serializer.NewCodecFactory(scheme) |
| ) |
| |
| func init() { |
| utilruntime.Must(webhookadmission.AddToScheme(scheme)) |
| utilruntime.Must(v1alpha1.AddToScheme(scheme)) |
| } |
| |
| // LoadConfig extract the KubeConfigFile from configFile |
| func LoadConfig(configFile io.Reader) (string, error) { |
| var kubeconfigFile string |
| if configFile != nil { |
| // we have a config so parse it. |
| data, err := ioutil.ReadAll(configFile) |
| if err != nil { |
| return "", err |
| } |
| decoder := codecs.UniversalDecoder() |
| decodedObj, err := runtime.Decode(decoder, data) |
| if err != nil { |
| return "", err |
| } |
| config, ok := decodedObj.(*webhookadmission.WebhookAdmission) |
| if !ok { |
| return "", fmt.Errorf("unexpected type: %T", decodedObj) |
| } |
| |
| if !path.IsAbs(config.KubeConfigFile) { |
| return "", field.Invalid(field.NewPath("kubeConfigFile"), config.KubeConfigFile, "must be an absolute file path") |
| } |
| |
| kubeconfigFile = config.KubeConfigFile |
| } |
| return kubeconfigFile, nil |
| } |