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package nodes
import (
"encoding/base64"
"encoding/json"
"io/ioutil"
"os"
"path/filepath"
)
// A ConfigDrive struct will be used to create a base64-encoded, gzipped ISO9660 image for use with Ironic.
type ConfigDrive struct {
UserData UserDataBuilder `json:"user_data"`
MetaData map[string]interface{} `json:"meta_data"`
NetworkData map[string]interface{} `json:"network_data"`
Version string `json:"-"`
BuildDirectory string `json:"-"`
}
// Interface to let us specify a raw string, or a map for the user data
type UserDataBuilder interface {
ToUserData() ([]byte, error)
}
type UserDataMap map[string]interface{}
type UserDataString string
// Converts a UserDataMap to JSON-string
func (data UserDataMap) ToUserData() ([]byte, error) {
return json.MarshalIndent(data, "", "\t")
}
func (data UserDataString) ToUserData() ([]byte, error) {
return []byte(data), nil
}
type ConfigDriveBuilder interface {
ToConfigDrive() (string, error)
}
// Writes out a ConfigDrive to a temporary directory, and returns the path
func (configDrive ConfigDrive) ToDirectory() (string, error) {
// Create a temporary directory for our config drive
directory, err := ioutil.TempDir(configDrive.BuildDirectory, "gophercloud")
if err != nil {
return "", err
}
// Build up the paths for OpenStack
var version string
if configDrive.Version == "" {
version = "latest"
} else {
version = configDrive.Version
}
path := filepath.FromSlash(directory + "/openstack/" + version)
if err := os.MkdirAll(path, 0755); err != nil {
return "", err
}
// Dump out user data
if configDrive.UserData != nil {
userDataPath := filepath.FromSlash(path + "/user_data")
data, err := configDrive.UserData.ToUserData()
if err != nil {
return "", err
}
if err := ioutil.WriteFile(userDataPath, data, 0644); err != nil {
return "", err
}
}
// Dump out meta data
if configDrive.MetaData != nil {
metaDataPath := filepath.FromSlash(path + "/meta_data.json")
data, err := json.Marshal(configDrive.MetaData)
if err != nil {
return "", err
}
if err := ioutil.WriteFile(metaDataPath, data, 0644); err != nil {
return "", err
}
}
// Dump out network data
if configDrive.NetworkData != nil {
networkDataPath := filepath.FromSlash(path + "/network_data.json")
data, err := json.Marshal(configDrive.NetworkData)
if err != nil {
return "", err
}
if err := ioutil.WriteFile(networkDataPath, data, 0644); err != nil {
return "", err
}
}
return directory, nil
}
// Writes out the ConfigDrive struct to a directory structure, and then
// packs it as a base64-encoded gzipped ISO9660 image.
func (configDrive ConfigDrive) ToConfigDrive() (string, error) {
directory, err := configDrive.ToDirectory()
if err != nil {
return "", err
}
defer os.RemoveAll(directory)
// Pack result as gzipped ISO9660 file
result, err := PackDirectoryAsISO(directory)
if err != nil {
return "", err
}
// Return as base64-encoded data
return base64.StdEncoding.EncodeToString(result), nil
}
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