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// Copyright 2013 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package container
import (
"io/ioutil"
"path/filepath"
"regexp"
"strings"
"github.com/loggo/loggo"
coreCloudinit "launchpad.net/juju-core/cloudinit"
"launchpad.net/juju-core/environs/cloudinit"
"launchpad.net/juju-core/utils"
)
var (
logger = loggo.GetLogger("juju.container")
aptHTTPProxyRE = regexp.MustCompile(`(?i)^Acquire::HTTP::Proxy\s+"([^"]+)";$`)
)
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
}
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) {
// consider not having this line hardcoded...
machineConfig.DataDir = "/var/lib/juju"
cloudConfig := coreCloudinit.New()
err := cloudinit.Configure(machineConfig, cloudConfig)
if err != nil {
return nil, err
}
// Run apt-config to fetch proxy settings from host. If no proxy
// settings are configured, then we don't set up any proxy information
// on the container.
proxyConfig, err := utils.AptConfigProxy()
if err != nil {
return nil, err
}
if proxyConfig != "" {
var proxyLines []string
for _, line := range strings.Split(proxyConfig, "\n") {
line = strings.TrimSpace(line)
if len(line) > 0 {
if m := aptHTTPProxyRE.FindStringSubmatch(line); m != nil {
cloudConfig.SetAptProxy(m[1])
} else {
proxyLines = append(proxyLines, line)
}
}
}
if len(proxyLines) > 0 {
cloudConfig.AddFile(
"/etc/apt/apt.conf.d/99proxy-extra",
strings.Join(proxyLines, "\n"),
0644)
}
}
// 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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