action does not be deleted when workflow execution is delete

[yong sheng gong]

problem:
in https://review.openstack.org/#/c/457140/5/tacker/nfvo/workflows/vim_monitor/vim_ping_action.py

I am trying to implement a long-live action:
    def run(self):
        while True:
            status = self._ping()
            if self.current_status != status:
                self.current_status = self._update(status)

to stop the action, I expected it will be deleted by deleting the workflow execution.

But, when I delete the workflow execution, the action is still running.

expectation:

the action is stopped.

[Dougal Matthews (d0ugal)]

You should add the iteration within the workflow. For example....

---
version: 2.0

ping_forever:
  tasks:
    ping:
      action: my_action.ping
      on-complete: ping