103 lines
2.5 KiB
Go
103 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/vtolstov/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 || len(data) == 0 {
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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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if m.NetworkConfig.ContentPath != "" {
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metadata.NetworkConfig, err = cd.tryReadFile(path.Join(cd.openstackRoot(), m.NetworkConfig.ContentPath))
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}
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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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