// sync compares the staged and dest config files and attempts to sync them
// if they differ. sync will run a config check command if set before
// overwriting the target config file. Finally, sync will run a reload command
// if set to have the application or service pick up the changes.
// It returns an error if any.
func (t *TemplateResource) sync() error {
staged := t.StageFile.Name()
defer os.Remove(staged)
log.Debug("Comparing candidate config to " + t.Dest)
ok, err := sameConfig(staged, t.Dest)
if err != nil {
log.Error(err.Error())
}
if config.Noop() {
log.Warning("Noop mode enabled " + t.Dest + " will not be modified")
return nil
}
if !ok {
log.Info("Target config " + t.Dest + " out of sync")
if t.CheckCmd != "" {
if err := t.check(); err != nil {
return errors.New("Config check failed: " + err.Error())
}
}
log.Debug("Overwriting target config " + t.Dest)
if err := os.Rename(staged, t.Dest); err != nil {
return err
}
if t.ReloadCmd != "" {
if err := t.reload(); err != nil {
return err
}
}
log.Info("Target config " + t.Dest + " has been updated")
} else {
log.Info("Target config " + t.Dest + " in sync")
}
return nil
}
// sync compares the staged and dest config files and attempts to sync them
// if they differ. sync will run a config check command if set before
// overwriting the target config file. Finally, sync will run a reload command
// if set to have the application or service pick up the changes.
// It returns an error if any.
func (t *TemplateResource) sync() error {
staged := t.StageFile.Name()
defer os.Remove(staged)
log.Debug("Comparing candidate config to " + t.Dest)
ok, err := sameConfig(staged, t.Dest)
if err != nil {
log.Error(err.Error())
}
if config.Noop() {
log.Warning("Noop mode enabled " + t.Dest + " will not be modified")
return nil
}
if !ok {
log.Info("Target config " + t.Dest + " out of sync")
if t.CheckCmd != "" {
if err := t.check(); err != nil {
return errors.New("Config check failed: " + err.Error())
}
}
log.Debug("Overwriting target config " + t.Dest)
err := os.Rename(staged, t.Dest)
if err != nil {
if strings.Contains(err.Error(), "device or resource busy") {
log.Debug("Rename failed - target is likely a mount. Trying to write instead")
// try to open the file and write to it
var contents []byte
var rerr error
contents, rerr = ioutil.ReadFile(staged)
if rerr != nil {
return rerr
}
err := ioutil.WriteFile(t.Dest, contents, t.FileMode)
// make sure owner and group match the temp file, in case the file was created with WriteFile
os.Chown(t.Dest, t.Uid, t.Gid)
if err != nil {
return err
}
} else {
return err
}
}
if t.ReloadCmd != "" {
if err := t.reload(); err != nil {
return err
}
}
log.Info("Target config " + t.Dest + " has been updated")
} else {
log.Info("Target config " + t.Dest + " in sync")
}
return nil
}