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gcp.go
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gcp.go
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// Copyright 2016 CoreOS, Inc.
//
// 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.
// The gcp provider fetches a remote configuration from the GCE user-data
// metadata service URL.
package gcp
import (
"net/http"
"net/url"
"github.com/coreos/ignition/v2/config/v3_5_experimental/types"
"github.com/coreos/ignition/v2/internal/platform"
"github.com/coreos/ignition/v2/internal/providers/util"
"github.com/coreos/ignition/v2/internal/resource"
"github.com/coreos/vcontext/report"
)
var (
userdataUrl = url.URL{
Scheme: "http",
Host: "169.254.169.254",
Path: "computeMetadata/v1/instance/attributes/user-data",
}
metadataHeaderKey = "Metadata-Flavor"
metadataHeaderVal = "Google"
)
func init() {
platform.Register(platform.Provider{
Name: "gcp",
Fetch: fetchConfig,
})
}
func fetchConfig(f *resource.Fetcher) (types.Config, report.Report, error) {
headers := make(http.Header)
headers.Set(metadataHeaderKey, metadataHeaderVal)
data, err := f.FetchToBuffer(userdataUrl, resource.FetchOptions{
Headers: headers,
})
if err != nil && err != resource.ErrNotFound {
return types.Config{}, report.Report{}, err
}
return util.ParseConfig(f.Logger, data)
}