mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-19 07:01:02 +01:00
86 lines
2.5 KiB
Go
86 lines
2.5 KiB
Go
// Copyright 2023 Google LLC
|
|
//
|
|
// 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 credentials
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"net/url"
|
|
"strings"
|
|
"time"
|
|
|
|
"cloud.google.com/go/auth"
|
|
"cloud.google.com/go/compute/metadata"
|
|
)
|
|
|
|
var (
|
|
computeTokenMetadata = map[string]interface{}{
|
|
"auth.google.tokenSource": "compute-metadata",
|
|
"auth.google.serviceAccount": "default",
|
|
}
|
|
computeTokenURI = "instance/service-accounts/default/token"
|
|
)
|
|
|
|
// computeTokenProvider creates a [cloud.google.com/go/auth.TokenProvider] that
|
|
// uses the metadata service to retrieve tokens.
|
|
func computeTokenProvider(earlyExpiry time.Duration, scope ...string) auth.TokenProvider {
|
|
return auth.NewCachedTokenProvider(computeProvider{scopes: scope}, &auth.CachedTokenProviderOptions{
|
|
ExpireEarly: earlyExpiry,
|
|
})
|
|
}
|
|
|
|
// computeProvider fetches tokens from the google cloud metadata service.
|
|
type computeProvider struct {
|
|
scopes []string
|
|
}
|
|
|
|
type metadataTokenResp struct {
|
|
AccessToken string `json:"access_token"`
|
|
ExpiresInSec int `json:"expires_in"`
|
|
TokenType string `json:"token_type"`
|
|
}
|
|
|
|
func (cs computeProvider) Token(ctx context.Context) (*auth.Token, error) {
|
|
tokenURI, err := url.Parse(computeTokenURI)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if len(cs.scopes) > 0 {
|
|
v := url.Values{}
|
|
v.Set("scopes", strings.Join(cs.scopes, ","))
|
|
tokenURI.RawQuery = v.Encode()
|
|
}
|
|
tokenJSON, err := metadata.GetWithContext(ctx, tokenURI.String())
|
|
if err != nil {
|
|
return nil, fmt.Errorf("credentials: cannot fetch token: %w", err)
|
|
}
|
|
var res metadataTokenResp
|
|
if err := json.NewDecoder(strings.NewReader(tokenJSON)).Decode(&res); err != nil {
|
|
return nil, fmt.Errorf("credentials: invalid token JSON from metadata: %w", err)
|
|
}
|
|
if res.ExpiresInSec == 0 || res.AccessToken == "" {
|
|
return nil, errors.New("credentials: incomplete token received from metadata")
|
|
}
|
|
return &auth.Token{
|
|
Value: res.AccessToken,
|
|
Type: res.TokenType,
|
|
Expiry: time.Now().Add(time.Duration(res.ExpiresInSec) * time.Second),
|
|
Metadata: computeTokenMetadata,
|
|
}, nil
|
|
|
|
}
|