Salt: Salt-cloud API completely broken and nonfunctional sometime between April and now/after migrating to python 3

[fake-name]

Description of Issue

I'm using the salt.cloud.CloudClient() interface to manage salt minions.

Currently, every invocation of CloudClient().<function> by my code now fails.

Traceback (most recent call last):
  File "salt_scheduler.py", line 326, in <module>
    refresh()
  File "salt_scheduler.py", line 259, in refresh
    sched.destroy_vm(vm_name)
  File "salt_scheduler.py", line 140, in destroy_vm
    self.interface.destroy_client(vm_name)
  File "/home/client/AutoTriever/marshaller/salt_runner.py", line 659, in destroy_client
    ret = self.cc.destroy([clientname])
  File "/usr/local/lib/python3.6/dist-packages/salt/cloud/__init__.py", line 390, in destroy
    mapper.destroy(names)
  File "/usr/local/lib/python3.6/dist-packages/salt/cloud/__init__.py", line 1023, in destroy
    ret = self.clouds[fun](name)
  File "/usr/local/lib/python3.6/dist-packages/salt/cloud/clouds/linode.py", line 742, in destroy
    transport=__opts__['transport']
  File "/usr/local/lib/python3.6/dist-packages/salt/utils/cloud.py", line 2016, in fire_event
    time.sleep(0.025)
  File "/usr/local/lib/python3.6/dist-packages/salt/utils/event.py", line 905, in __exit__
    self.destroy()
  File "/usr/local/lib/python3.6/dist-packages/salt/utils/event.py", line 790, in destroy
    self.io_loop.close()
  File "/usr/lib/python3/dist-packages/tornado/ioloop.py", line 716, in close
    self.remove_handler(self._waker.fileno())
  File "/usr/lib/python3/dist-packages/tornado/platform/posix.py", line 48, in fileno
    return self.reader.fileno()
ValueError: I/O operation on closed file

Traceback (most recent call last):
  File "salt_runner.py", line 930, in <module>
    go()
  File "salt_runner.py", line 922, in go
    fmap[command]()
  File "salt_runner.py", line 753, in dtest
    ret = herder.cc.create(names=[clientname], provider=provider, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/salt/cloud/__init__.py", line 429, in create
    mapper.create(vm_))
  File "/usr/local/lib/python3.6/dist-packages/salt/cloud/__init__.py", line 1261, in create
    output = self.clouds[func](vm_)
  File "/usr/local/lib/python3.6/dist-packages/salt/cloud/clouds/digitalocean.py", line 293, in create
    transport=__opts__['transport']
  File "/usr/local/lib/python3.6/dist-packages/salt/utils/cloud.py", line 2016, in fire_event
    time.sleep(0.025)
  File "/usr/local/lib/python3.6/dist-packages/salt/utils/event.py", line 905, in __exit__
    self.destroy()
  File "/usr/local/lib/python3.6/dist-packages/salt/utils/event.py", line 790, in destroy
    self.io_loop.close()
  File "/usr/lib/python3/dist-packages/tornado/ioloop.py", line 716, in close
    self.remove_handler(self._waker.fileno())
  File "/usr/lib/python3/dist-packages/tornado/platform/posix.py", line 48, in fileno
    return self.reader.fileno()
ValueError: I/O operation on closed file

It looks, at a quick check, like something somewhere added a dependency on a tornado ioloop without considering how this would affect consumers of the various APIs.

I last merged upstream on April 23, though I'm currently running salt from the official apt repo.

Note that this may also be a python2/python3 issue, as I both updated salt and switched from python 2 to python 3.

Setup

https://github.com/fake-name/AutoTriever/tree/master/marshaller

Steps to Reproduce Issue

Execute salt_runner.py ltest from https://github.com/fake-name/AutoTriever/tree/master/marshaller

Note: this will create a linode VM.

You can also do salt_runner.py dtest (digital ocean), salt_runner.py vtest (vultr) and a set of others. See the output from salt_runner.py without args.

Versions Report

Salt Version:
           Salt: 2016.11.0-255-g4de7a0d

Dependency Versions:
           cffi: Not Installed
       cherrypy: unknown
       dateutil: 2.6.1
      docker-py: Not Installed
          gitdb: 2.0.3
      gitpython: 2.1.8
         Jinja2: 2.10
        libgit2: Not Installed
       M2Crypto: Not Installed
           Mako: Not Installed
   msgpack-pure: Not Installed
 msgpack-python: 0.5.6
   mysql-python: Not Installed
      pycparser: Not Installed
       pycrypto: 2.6.1
   pycryptodome: Not Installed
         pygit2: Not Installed
         Python: 3.6.8 (default, Jan 14 2019, 11:02:34)
   python-gnupg: 0.4.1
         PyYAML: 3.12
          PyZMQ: 16.0.2
          smmap: 2.0.3
        timelib: Not Installed
        Tornado: 4.5.3
            ZMQ: 4.2.5

System Versions:
           dist: Ubuntu 18.04 bionic
         locale: UTF-8
        machine: x86_64
        release: 3.14.32-xxxx-grs-ipv6-64
         system: Linux
        version: Ubuntu 18.04 bionic

[fake-name]

Going into /usr/local/lib/python3.6/dist-packages/salt/utils/event.py and commenting out self.io_loop.close in the SaltEvent.destroy() function appears to at least allow me to create VMs again.

I have no idea what this will wind up breaking, but from what I can tell, the tornado.ioloop.IOLoop() returns a singleton, so we don't want to close the ioloop anyways, since I'm running a persistent application that periodically runs setup/teardown tasks via apscheduler.

---

Further reading makes me think passing keep_loop=True to salt.utils.event.get_event() in fire_event() in salt/utils/cloud.py is probably the correct solution.

In any event, it makes thins work, at least.

[Akm0d]

Thanks for reporting the issue. Team, we need to find out if this happens in later versions of salt

[fake-name]

I'm basically running develop, so it currently happens there.

[fake-name]

Note that I've been running with https://github.com/fake-name/salt/commit/60736621e9fcf7ee3a150238d5de19b1fab5be16 for the last week (since the issue was opened, basically), and it's been apparently OK (though I deliberately don't use a lot of salt's features).

I both updated to the current develop, AND switched from python 2 to python 3 (which was kind of dumb to do together, in retrospect), so I'm not sure if this is a problem triggered by the py3k change or the recent develop.

[Akm0d]

Would you mind submitting a Pull Request for https://github.com/fake-name/salt/commit/60736621e9fcf7ee3a150238d5de19b1fab5be16?

[fake-name]

Sure.

Mostly, I figured I should check if there was a reason the reactor was getting torn down the way it was before just blindly PRing changes.

[stale[bot]]

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[stale[bot]]

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