mirror of
https://github.com/k3s-io/kubernetes.git
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81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
/*
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Copyright 2022 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 main
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import (
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"encoding/json"
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"errors"
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"io"
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"io/ioutil"
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"net/http"
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"os"
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"time"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/klog/v2"
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credentialproviderv1beta1 "k8s.io/kubelet/pkg/apis/credentialprovider/v1beta1"
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)
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const metadataTokenEndpoint = "http://metadata.google.internal./computeMetadata/v1/instance/service-accounts/default/token"
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func main() {
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if err := getCredentials(metadataTokenEndpoint, os.Stdin, os.Stdout); err != nil {
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klog.Fatalf("failed to get credentials: %v", err)
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}
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}
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func getCredentials(tokenEndpoint string, r io.Reader, w io.Writer) error {
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provider := &provider{
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client: &http.Client{
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Timeout: 10 * time.Second,
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},
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tokenEndpoint: tokenEndpoint,
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}
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data, err := ioutil.ReadAll(r)
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if err != nil {
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return err
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}
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var authRequest credentialproviderv1beta1.CredentialProviderRequest
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err = json.Unmarshal(data, &authRequest)
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if err != nil {
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return err
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}
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auth, err := provider.Provide(authRequest.Image)
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if err != nil {
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return err
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}
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response := &credentialproviderv1beta1.CredentialProviderResponse{
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TypeMeta: metav1.TypeMeta{
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Kind: "CredentialProviderResponse",
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APIVersion: "credentialprovider.kubelet.k8s.io/v1beta1",
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},
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CacheKeyType: credentialproviderv1beta1.RegistryPluginCacheKeyType,
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Auth: auth,
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}
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if err := json.NewEncoder(w).Encode(response); err != nil {
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// The error from json.Marshal is intentionally not included so as to not leak credentials into the logs
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return errors.New("error marshaling response")
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}
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return nil
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}
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