mirror of https://github.com/prometheus/prometheus
55 lines
1.8 KiB
Go
55 lines
1.8 KiB
Go
// Copyright 2024 The Prometheus 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 googleiam provides an http.RoundTripper that attaches an Google Cloud accessToken
|
|
// to remote write requests.
|
|
package googleiam
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net/http"
|
|
|
|
"golang.org/x/oauth2/google"
|
|
"google.golang.org/api/option"
|
|
apihttp "google.golang.org/api/transport/http"
|
|
)
|
|
|
|
type Config struct {
|
|
CredentialsFile string `yaml:"credentials_file,omitempty"`
|
|
}
|
|
|
|
// NewRoundTripper creates a round tripper that adds Google Cloud Monitoring authorization to calls
|
|
// using either a credentials file or the default credentials.
|
|
func NewRoundTripper(cfg *Config, next http.RoundTripper) (http.RoundTripper, error) {
|
|
if next == nil {
|
|
next = http.DefaultTransport
|
|
}
|
|
const scopes = "https://www.googleapis.com/auth/monitoring.write"
|
|
ctx := context.Background()
|
|
opts := []option.ClientOption{
|
|
option.WithScopes(scopes),
|
|
}
|
|
if cfg.CredentialsFile != "" {
|
|
opts = append(opts, option.WithCredentialsFile(cfg.CredentialsFile))
|
|
} else {
|
|
creds, err := google.FindDefaultCredentials(ctx, scopes)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error finding default Google credentials: %w", err)
|
|
}
|
|
opts = append(opts, option.WithCredentials(creds))
|
|
}
|
|
|
|
return apihttp.NewTransport(ctx, next, opts...)
|
|
}
|