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// Copyright 2013 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package container
import (
"io/ioutil"
"path/filepath"
"github.com/juju/loggo"
coreCloudinit "launchpad.net/juju-core/cloudinit"
"launchpad.net/juju-core/environs/cloudinit"
)
var (
logger = loggo.GetLogger("juju.container")
)
// WriteUserData generates the cloud init for the specified machine config,
// and writes the serialized form out to a cloud-init file in the directory
// specified.
func WriteUserData(machineConfig *cloudinit.MachineConfig, directory string) (string, error) {
userData, err := cloudInitUserData(machineConfig)
if err != nil {
logger.Errorf("failed to create user data: %v", err)
return "", err
}
return WriteCloudInitFile(directory, userData)
}
// WriteCloudInitFile writes the data out to a cloud-init file in the
// directory specified, and returns the filename.
func WriteCloudInitFile(directory string, userData []byte) (string, error) {
userDataFilename := filepath.Join(directory, "cloud-init")
if err := ioutil.WriteFile(userDataFilename, userData, 0644); err != nil {
logger.Errorf("failed to write user data: %v", err)
return "", err
}
return userDataFilename, nil
}
func cloudInitUserData(machineConfig *cloudinit.MachineConfig) ([]byte, error) {
cloudConfig := coreCloudinit.New()
err := cloudinit.Configure(machineConfig, cloudConfig)
if err != nil {
return nil, err
}
// Run ifconfig to get the addresses of the internal container at least
// logged in the host.
cloudConfig.AddRunCmd("ifconfig")
data, err := cloudConfig.Render()
if err != nil {
return nil, err
}
return data, nil
}
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