9605b5edf2
Its easier to let each datasource grab all metadata in the FetchMetadata stage than to break it into multiple stages.
118 lines
2.6 KiB
Go
118 lines
2.6 KiB
Go
// Copyright 2015 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.
|
|
|
|
package waagent
|
|
|
|
import (
|
|
"encoding/xml"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net"
|
|
"os"
|
|
"path"
|
|
|
|
"github.com/coreos/coreos-cloudinit/datasource"
|
|
)
|
|
|
|
type waagent struct {
|
|
root string
|
|
readFile func(filename string) ([]byte, error)
|
|
}
|
|
|
|
func NewDatasource(root string) *waagent {
|
|
return &waagent{root, ioutil.ReadFile}
|
|
}
|
|
|
|
func (a *waagent) IsAvailable() bool {
|
|
_, err := os.Stat(path.Join(a.root, "provisioned"))
|
|
return !os.IsNotExist(err)
|
|
}
|
|
|
|
func (a *waagent) AvailabilityChanges() bool {
|
|
return true
|
|
}
|
|
|
|
func (a *waagent) ConfigRoot() string {
|
|
return a.root
|
|
}
|
|
|
|
func (a *waagent) FetchMetadata() (metadata datasource.Metadata, err error) {
|
|
var metadataBytes []byte
|
|
if metadataBytes, err = a.tryReadFile(path.Join(a.root, "SharedConfig.xml")); err != nil {
|
|
return
|
|
}
|
|
if len(metadataBytes) == 0 {
|
|
return
|
|
}
|
|
|
|
type Instance struct {
|
|
Id string `xml:"id,attr"`
|
|
Address string `xml:"address,attr"`
|
|
InputEndpoints struct {
|
|
Endpoints []struct {
|
|
LoadBalancedPublicAddress string `xml:"loadBalancedPublicAddress,attr"`
|
|
} `xml:"Endpoint"`
|
|
}
|
|
}
|
|
|
|
type SharedConfig struct {
|
|
Incarnation struct {
|
|
Instance string `xml:"instance,attr"`
|
|
}
|
|
Instances struct {
|
|
Instances []Instance `xml:"Instance"`
|
|
}
|
|
}
|
|
|
|
var m SharedConfig
|
|
if err = xml.Unmarshal(metadataBytes, &m); err != nil {
|
|
return
|
|
}
|
|
|
|
var instance Instance
|
|
for _, i := range m.Instances.Instances {
|
|
if i.Id == m.Incarnation.Instance {
|
|
instance = i
|
|
break
|
|
}
|
|
}
|
|
|
|
metadata.PrivateIPv4 = net.ParseIP(instance.Address)
|
|
for _, e := range instance.InputEndpoints.Endpoints {
|
|
host, _, err := net.SplitHostPort(e.LoadBalancedPublicAddress)
|
|
if err == nil {
|
|
metadata.PublicIPv4 = net.ParseIP(host)
|
|
break
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (a *waagent) FetchUserdata() ([]byte, error) {
|
|
return a.tryReadFile(path.Join(a.root, "CustomData"))
|
|
}
|
|
|
|
func (a *waagent) Type() string {
|
|
return "waagent"
|
|
}
|
|
|
|
func (a *waagent) tryReadFile(filename string) ([]byte, error) {
|
|
fmt.Printf("Attempting to read from %q\n", filename)
|
|
data, err := a.readFile(filename)
|
|
if os.IsNotExist(err) {
|
|
err = nil
|
|
}
|
|
return data, err
|
|
}
|