mirror of https://github.com/kubernetes/kops.git
72 lines
1.8 KiB
Go
72 lines
1.8 KiB
Go
/*
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Copyright 2023 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 do
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import (
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"fmt"
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"io"
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"net/http"
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"k8s.io/kops/pkg/bootstrap"
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)
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const DOAuthenticationTokenPrefix = "x-digitalocean-droplet-id "
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type doAuthenticator struct {
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}
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var _ bootstrap.Authenticator = &doAuthenticator{}
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func NewAuthenticator() (bootstrap.Authenticator, error) {
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return &doAuthenticator{}, nil
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}
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func (o *doAuthenticator) CreateToken(body []byte) (string, error) {
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dropletID, err := getMetadataDropletID()
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if err != nil {
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return "", fmt.Errorf("unable to fetch droplet id: %w", err)
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}
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return DOAuthenticationTokenPrefix + dropletID, nil
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}
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const (
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dropletIDMetadataURL = "http://169.254.169.254/metadata/v1/id"
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)
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func getMetadataDropletID() (string, error) {
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return getMetadata(dropletIDMetadataURL)
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}
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func getMetadata(url string) (string, error) {
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resp, err := http.Get(url)
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if err != nil {
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return "", fmt.Errorf("error querying droplet metadata: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return "", fmt.Errorf("droplet metadata returned non-200 status code: %d", resp.StatusCode)
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}
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bodyBytes, err := io.ReadAll(resp.Body)
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if err != nil {
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return "", fmt.Errorf("error reading droplet metadata: %w", err)
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}
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return string(bodyBytes), nil
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}
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