69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package config
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import (
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"fmt"
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"io"
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"io/ioutil"
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"path"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/serializer"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"k8s.io/apiserver/pkg/admission/plugin/webhook/config/apis/webhookadmission"
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"k8s.io/apiserver/pkg/admission/plugin/webhook/config/apis/webhookadmission/v1alpha1"
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)
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var (
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scheme = runtime.NewScheme()
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codecs = serializer.NewCodecFactory(scheme)
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)
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func init() {
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webhookadmission.AddToScheme(scheme)
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v1alpha1.AddToScheme(scheme)
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}
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// LoadConfig extract the KubeConfigFile from configFile
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func LoadConfig(configFile io.Reader) (string, error) {
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var kubeconfigFile string
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if configFile != nil {
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// we have a config so parse it.
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data, err := ioutil.ReadAll(configFile)
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if err != nil {
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return "", err
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}
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decoder := codecs.UniversalDecoder()
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decodedObj, err := runtime.Decode(decoder, data)
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if err != nil {
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return "", err
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}
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config, ok := decodedObj.(*webhookadmission.WebhookAdmission)
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if !ok {
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return "", fmt.Errorf("unexpected type: %T", decodedObj)
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}
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if !path.IsAbs(config.KubeConfigFile) {
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return "", field.Invalid(field.NewPath("kubeConfigFile"), config.KubeConfigFile, "must be an absolute file path")
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}
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kubeconfigFile = config.KubeConfigFile
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}
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return kubeconfigFile, nil
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}
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