func (p *containerProvisioner) loop() error {
var environConfigChanges <-chan struct{}
environWatcher, err := p.st.WatchForEnvironConfigChanges()
if err != nil {
return err
}
environConfigChanges = environWatcher.Changes()
defer watcher.Stop(environWatcher, &p.tomb)
config, err := p.st.EnvironConfig()
if err != nil {
return err
}
harvestMode := config.ProvisionerHarvestMode()
task, err := p.getStartTask(harvestMode)
if err != nil {
return err
}
defer watcher.Stop(task, &p.tomb)
for {
select {
case <-p.tomb.Dying():
return tomb.ErrDying
case <-task.Dying():
err := task.Err()
logger.Errorf("%s provisioner died: %v", p.containerType, err)
return err
case _, ok := <-environConfigChanges:
if !ok {
return watcher.EnsureErr(environWatcher)
}
environConfig, err := p.st.EnvironConfig()
if err != nil {
logger.Errorf("cannot load environment configuration: %v", err)
return err
}
p.configObserver.notify(environConfig)
task.SetHarvestMode(environConfig.ProvisionerHarvestMode())
}
}
}
func (p *containerProvisioner) loop() error {
environWatcher, err := p.st.WatchForEnvironConfigChanges()
if err != nil {
return errors.Trace(err)
}
if err := p.catacomb.Add(environWatcher); err != nil {
return errors.Trace(err)
}
config, err := p.st.EnvironConfig()
if err != nil {
return err
}
harvestMode := config.ProvisionerHarvestMode()
task, err := p.getStartTask(harvestMode)
if err != nil {
return err
}
if err := p.catacomb.Add(task); err != nil {
return errors.Trace(err)
}
for {
select {
case <-p.catacomb.Dying():
return p.catacomb.ErrDying()
case _, ok := <-environWatcher.Changes():
if !ok {
return errors.New("environment configuratioon watch closed")
}
environConfig, err := p.st.EnvironConfig()
if err != nil {
return errors.Annotate(err, "cannot load environment configuration")
}
p.configObserver.notify(environConfig)
task.SetHarvestMode(environConfig.ProvisionerHarvestMode())
}
}
}