f0b9eaf2fe
As it turns out, certain metadata is only present in the ec2 flavor of metadata (e.g. public_ipv4) and other data is only present in the openstack flavor (e.g. network_config). For now, just read the openstack metadata.
64 lines
1.3 KiB
Go
64 lines
1.3 KiB
Go
package configdrive
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"os"
|
|
"path"
|
|
)
|
|
|
|
const (
|
|
openstackApiVersion = "latest"
|
|
)
|
|
|
|
type configDrive struct {
|
|
root string
|
|
readFile func(filename string) ([]byte, error)
|
|
}
|
|
|
|
func NewDatasource(root string) *configDrive {
|
|
return &configDrive{root, ioutil.ReadFile}
|
|
}
|
|
|
|
func (cd *configDrive) IsAvailable() bool {
|
|
_, err := os.Stat(cd.root)
|
|
return !os.IsNotExist(err)
|
|
}
|
|
|
|
func (cd *configDrive) AvailabilityChanges() bool {
|
|
return true
|
|
}
|
|
|
|
func (cd *configDrive) ConfigRoot() string {
|
|
return cd.openstackRoot()
|
|
}
|
|
|
|
func (cd *configDrive) FetchMetadata() ([]byte, error) {
|
|
return cd.tryReadFile(path.Join(cd.openstackVersionRoot(), "meta_data.json"))
|
|
}
|
|
|
|
func (cd *configDrive) FetchUserdata() ([]byte, error) {
|
|
return cd.tryReadFile(path.Join(cd.openstackVersionRoot(), "user_data"))
|
|
}
|
|
|
|
func (cd *configDrive) Type() string {
|
|
return "cloud-drive"
|
|
}
|
|
|
|
func (cd *configDrive) openstackRoot() string {
|
|
return path.Join(cd.root, "openstack")
|
|
}
|
|
|
|
func (cd *configDrive) openstackVersionRoot() string {
|
|
return path.Join(cd.openstackRoot(), openstackApiVersion)
|
|
}
|
|
|
|
func (cd *configDrive) tryReadFile(filename string) ([]byte, error) {
|
|
fmt.Printf("Attempting to read from %q\n", filename)
|
|
data, err := cd.readFile(filename)
|
|
if os.IsNotExist(err) {
|
|
err = nil
|
|
}
|
|
return data, err
|
|
}
|