9605b5edf2
Its easier to let each datasource grab all metadata in the FetchMetadata stage than to break it into multiple stages.
101 lines
2.5 KiB
Go
101 lines
2.5 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package configdrive
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"path"
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"github.com/coreos/coreos-cloudinit/datasource"
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)
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const (
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openstackApiVersion = "latest"
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)
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type configDrive struct {
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root string
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readFile func(filename string) ([]byte, error)
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}
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func NewDatasource(root string) *configDrive {
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return &configDrive{root, ioutil.ReadFile}
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}
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func (cd *configDrive) IsAvailable() bool {
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_, err := os.Stat(cd.root)
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return !os.IsNotExist(err)
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}
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func (cd *configDrive) AvailabilityChanges() bool {
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return true
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}
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func (cd *configDrive) ConfigRoot() string {
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return cd.openstackRoot()
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}
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func (cd *configDrive) FetchMetadata() (metadata datasource.Metadata, err error) {
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var data []byte
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var m struct {
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SSHAuthorizedKeyMap map[string]string `json:"public_keys"`
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Hostname string `json:"hostname"`
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NetworkConfig struct {
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ContentPath string `json:"content_path"`
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} `json:"network_config"`
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}
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if data, err = cd.tryReadFile(path.Join(cd.openstackVersionRoot(), "meta_data.json")); err != nil {
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return
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}
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if err = json.Unmarshal([]byte(data), &m); err != nil {
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return
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}
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metadata.SSHPublicKeys = m.SSHAuthorizedKeyMap
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metadata.Hostname = m.Hostname
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metadata.NetworkConfig, err = cd.tryReadFile(path.Join(cd.openstackRoot(), m.NetworkConfig.ContentPath))
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return
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}
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func (cd *configDrive) FetchUserdata() ([]byte, error) {
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return cd.tryReadFile(path.Join(cd.openstackVersionRoot(), "user_data"))
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}
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func (cd *configDrive) Type() string {
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return "cloud-drive"
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}
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func (cd *configDrive) openstackRoot() string {
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return path.Join(cd.root, "openstack")
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}
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func (cd *configDrive) openstackVersionRoot() string {
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return path.Join(cd.openstackRoot(), openstackApiVersion)
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}
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func (cd *configDrive) tryReadFile(filename string) ([]byte, error) {
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fmt.Printf("Attempting to read from %q\n", filename)
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data, err := cd.readFile(filename)
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if os.IsNotExist(err) {
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err = nil
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}
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return data, err
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}
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