func checkForUpdates() {
checkTicker := time.Tick(checkFrequency)
for range checkTicker {
log.Println("Checking for updates..")
update, err := cr.GetUpdate(instanceID, appID, groupID, currentVersion)
if err != nil {
log.Printf("\t- No updates (error: %v)\n", err)
continue
}
log.Println("\t- Updates available!")
log.Println("\t- Downloading update package..")
cr.EventDownloadStarted(instanceID, appID, groupID)
downloadPackage(update.URL, update.Filename)
log.Println("\t- Update package downloaded")
cr.EventDownloadFinished(instanceID, appID, groupID)
log.Println("\t- Update completed successfully :)")
cr.EventUpdateSucceeded(instanceID, appID, groupID)
log.Println("\t- Restarting server using new package")
syscall.Kill(syscall.Getpid(), syscall.SIGUSR2)
break
}
}
func (u *Updater) processUpdate(update *cr.Update) error {
logger.Info("downloading artifact", "filename", update.Filename, "version", update.Version)
cr.EventDownloadStarted(u.a.InstanceID, u.a.AppID, u.a.GroupID)
artifactPath, err := u.a.Download(update)
if err != nil {
logger.Error("artifact download failed", "filename", update.Filename, "version", update.Version, "error", err)
return err
}
logger.Info("artifact downloaded", "artifactPath", artifactPath)
cr.EventDownloadFinished(u.a.InstanceID, u.a.AppID, u.a.GroupID)
logger.Info("installing update", "version", update.Version)
if err := u.a.Install(artifactPath); err != nil {
logger.Error("install update failed", "artifactPath", artifactPath)
return err
}
logger.Info("update installed", "version", update.Version)
if err := u.trackInstalledUpdate(update); err != nil {
logger.Error("trackInstalledUpdate failed", "version", update.Version, "error", err)
}
logger.Info("sending signal to process now to restart..", "version", update.Version)
syscall.Kill(syscall.Getpid(), u.signal)
return nil
}