func (ctx *SimpleContext) RecallUnit(unitName string) error {
svc := ctx.findUpstartJob(unitName)
if svc == nil || !svc.Installed() {
return fmt.Errorf("unit %q is not deployed", unitName)
}
if err := svc.Remove(); err != nil {
return err
}
tag := state.UnitTag(unitName)
agentDir := agent.Dir(ctx.dataDir, tag)
if err := os.RemoveAll(agentDir); err != nil {
return err
}
if err := os.Remove(ctx.syslogConfigPath); err != nil && !os.IsNotExist(err) {
logger.Warningf("installer: cannot remove %q: %v", ctx.syslogConfigPath, err)
}
// Defer this so a failure here does not impede the cleanup (as in tests).
defer func() {
if err := syslog.Restart(); err != nil {
logger.Warningf("installer: cannot restart syslog daemon: %v", err)
}
}()
toolsDir := agent.ToolsDir(ctx.dataDir, tag)
return os.Remove(toolsDir)
}
func (ctx *SimpleContext) DeployUnit(unitName, initialPassword string) (err error) {
// Check sanity.
svc := ctx.upstartService(unitName)
if svc.Installed() {
return fmt.Errorf("unit %q is already deployed", unitName)
}
// Link the current tools for use by the new agent.
tag := state.UnitTag(unitName)
_, err = agent.ChangeAgentTools(ctx.dataDir, tag, version.Current)
toolsDir := agent.ToolsDir(ctx.dataDir, tag)
defer removeOnErr(&err, toolsDir)
// Retrieve addresses from state.
stateAddrs, err := ctx.addresser.Addresses()
if err != nil {
return err
}
apiAddrs, err := ctx.addresser.APIAddresses()
if err != nil {
return err
}
stateInfo := state.Info{
Addrs: stateAddrs,
Tag: tag,
CACert: ctx.caCert,
}
apiInfo := api.Info{
Addrs: apiAddrs,
Tag: tag,
CACert: ctx.caCert,
}
// Prepare the agent's configuration data.
conf := &agent.Conf{
DataDir: ctx.dataDir,
OldPassword: initialPassword,
StateInfo: &stateInfo,
APIInfo: &apiInfo,
}
if err := conf.Write(); err != nil {
return err
}
defer removeOnErr(&err, conf.Dir())
// Install an upstart job that runs the unit agent.
logPath := path.Join(ctx.logDir, tag+".log")
syslogConfigRenderer := syslog.NewForwardConfig(tag, stateAddrs)
syslogConfigRenderer.ConfigDir = ctx.syslogConfigDir
syslogConfigRenderer.ConfigFileName = fmt.Sprintf("26-juju-%s.conf", tag)
if err := syslogConfigRenderer.Write(); err != nil {
return err
}
ctx.syslogConfigPath = syslogConfigRenderer.ConfigFilePath()
if err := syslog.Restart(); err != nil {
logger.Warningf("installer: cannot restart syslog daemon: %v", err)
}
defer removeOnErr(&err, ctx.syslogConfigPath)
cmd := strings.Join([]string{
path.Join(toolsDir, "jujud"), "unit",
"--data-dir", conf.DataDir,
"--unit-name", unitName,
"--debug", // TODO: propagate debug state sensibly
}, " ")
uconf := &upstart.Conf{
Service: *svc,
Desc: "juju unit agent for " + unitName,
Cmd: cmd,
Out: logPath,
// Propagate the provider type enviroment variable.
Env: map[string]string{
"JUJU_PROVIDER_TYPE": os.Getenv("JUJU_PROVIDER_TYPE"),
},
}
return uconf.Install()
}