// ConfigureScript generates the bash script that applies
// the specified cloud-config.
func ConfigureScript(cloudcfg *cloudinit.Config) (string, error) {
// TODO(axw): 2013-08-23 bug 1215777
// Carry out configuration for ssh-keys-per-user,
// machine-updates-authkeys, using cloud-init config.
//
// We should work with smoser to get a supported
// command in (or next to) cloud-init for manually
// invoking cloud-config. This would address the
// above comment by removing the need to generate a
// script "by hand".
// Bootcmds must be run before anything else,
// as they may affect package installation.
bootcmds, err := cmdlist(cloudcfg.BootCmds())
if err != nil {
return "", err
}
// Add package sources and packages.
pkgcmds, err := addPackageCommands(cloudcfg)
if err != nil {
return "", err
}
// Runcmds come last.
runcmds, err := cmdlist(cloudcfg.RunCmds())
if err != nil {
return "", err
}
// We prepend "set -xe". This is already in runcmds,
// but added here to avoid relying on that to be
// invariant.
script := []string{"#!/bin/bash", "set -e"}
// We must initialise progress reporting before entering
// the subshell and redirecting stderr.
script = append(script, cloudinit.InitProgressCmd())
stdout, stderr := cloudcfg.Output(cloudinit.OutAll)
script = append(script, "(")
if stderr != "" {
script = append(script, "(")
}
script = append(script, bootcmds...)
script = append(script, pkgcmds...)
script = append(script, runcmds...)
if stderr != "" {
script = append(script, ") "+stdout)
script = append(script, ") "+stderr)
} else {
script = append(script, ") "+stdout+" 2>&1")
}
return strings.Join(script, "\n"), nil
}
// addPackageCommands returns a slice of commands that, when run,
// will add the required apt repositories and packages.
func addPackageCommands(cfg *cloudinit.Config) ([]string, error) {
var cmds []string
if len(cfg.AptSources()) > 0 {
// Ensure add-apt-repository is available.
cmds = append(cmds, cloudinit.LogProgressCmd("Installing add-apt-repository"))
cmds = append(cmds, aptget+"install python-software-properties")
}
for _, src := range cfg.AptSources() {
// PPA keys are obtained by add-apt-repository, from launchpad.
if !strings.HasPrefix(src.Source, "ppa:") {
if src.Key != "" {
key := utils.ShQuote(src.Key)
cmd := fmt.Sprintf("printf '%%s\\n' %s | apt-key add -", key)
cmds = append(cmds, cmd)
}
}
cmds = append(cmds, cloudinit.LogProgressCmd("Adding apt repository: %s", src.Source))
cmds = append(cmds, "add-apt-repository -y "+utils.ShQuote(src.Source))
if src.Prefs != nil {
path := utils.ShQuote(src.Prefs.Path)
contents := utils.ShQuote(src.Prefs.FileContents())
cmds = append(cmds, "install -D -m 644 /dev/null "+path)
cmds = append(cmds, `printf '%s\n' `+contents+` > `+path)
}
}
if len(cfg.AptSources()) > 0 || cfg.AptUpdate() {
cmds = append(cmds, cloudinit.LogProgressCmd("Running apt-get update"))
cmds = append(cmds, aptget+"update")
}
if cfg.AptUpgrade() {
cmds = append(cmds, cloudinit.LogProgressCmd("Running apt-get upgrade"))
cmds = append(cmds, aptget+"upgrade")
}
for _, pkg := range cfg.Packages() {
cmds = append(cmds, cloudinit.LogProgressCmd("Installing package: %s", pkg))
if !strings.Contains(pkg, "--target-release") {
// We only need to shquote the package name if it does not
// contain additional arguments.
pkg = utils.ShQuote(pkg)
}
cmd := fmt.Sprintf(aptget+"install %s", pkg)
cmds = append(cmds, cmd)
}
if len(cmds) > 0 {
// setting DEBIAN_FRONTEND=noninteractive prevents debconf
// from prompting, always taking default values instead.
cmds = append([]string{"export DEBIAN_FRONTEND=noninteractive"}, cmds...)
}
return cmds, nil
}