"No rack controllers can access the BMC of node: <node name>" when using OpenStack nova power driver

[Yoshi Kadokawa]

Testing MAAS on OpenStack environment, but got Power error from the first node.
Found the following error in /var/log/maas/regiond.log

2016-11-10 12:41:38 [-] Failed to update power state of machine.
        Traceback (most recent call last):
          File "/usr/lib/python3/dist-packages/twisted/internet/base.py", line 1203, in mainLoop
            self.runUntilCurrent()
          File "/usr/lib/python3/dist-packages/twisted/internet/base.py", line 798, in runUntilCurrent
            f(*a, **kw)
          File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 434, in errback
            self._startRunCallbacks(fail)
          File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 501, in _startRunCallbacks
            self._runCallbacks()
        --- <exception caught here> ---
          File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 588, in _runCallbacks
            current.result = callback(current.result, *args, **kw)
          File "/usr/lib/python3/dist-packages/maasserver/websockets/handlers/machine.py", line 799, in eb_unknown
            failure.trap(UnknownPowerType, NotImplementedError)
          File "/usr/lib/python3/dist-packages/twisted/python/failure.py", line 342, in trap
            self.raiseException()
          File "/usr/lib/python3/dist-packages/twisted/python/failure.py", line 368, in raiseException
            raise self.value.with_traceback(self.tb)
          File "/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 246, in inContext
            result = inContext.theWork()
          File "/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 262, in <lambda>
            inContext.theWork = lambda: context.call(ctx, func, *args, **kw)
          File "/usr/lib/python3/dist-packages/twisted/python/context.py", line 118, in callWithContext
            return self.currentContext().callWithContext(ctx, func, *args, **kw)
          File "/usr/lib/python3/dist-packages/twisted/python/context.py", line 81, in callWithContext
            return func(*args,**kw)
          File "/usr/lib/python3/dist-packages/provisioningserver/utils/twisted.py", line 937, in callInContext
            return func(*args, **kwargs)
          File "/usr/lib/python3/dist-packages/maasserver/models/node.py", line 2897, in _get_bmc_client_connection_info
            self.hostname))
        maasserver.exceptions.PowerProblem: No rack controllers can access the BMC of node: test

[Yoshi Kadokawa (yoshikadokawa)]

It seems import_module was not enough, and could not call the specified method.
I have done a quick fix for this, and also added some stability fix when obtaining power query after commission of deploy.
I will add the diff later.

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "fix-nova-ppowerdriver.diff" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Bruno Carvalho (brunowcs)]

I´m with same problem in version MaaS 2.4 with Openstack newton.

Jul 30 20:10:03 uat-l-srv-90 maas.node: [warn] teste-nework-1: Could not change the power state. No rack controllers can access the BMC.
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: 2018-07-30 20:10:03 maasserver.websockets.handlers.machine: [critical] Failed to update power state of machine.
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011Traceback (most recent call last):
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/twisted/internet/asyncioreactor.py", line 267, in run
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 self._asyncioEventloop.run_forever()
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/twisted/internet/asyncioreactor.py", line 290, in run
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 f(*args, **kwargs)
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 500, in errback
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 self._startRunCallbacks(fail)
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 567, in _startRunCallbacks
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 self._runCallbacks()
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011--- <exception caught here> ---
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 653, in _runCallbacks
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 current.result = callback(current.result, *args, **kw)
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/maasserver/websockets/handlers/machine.py", line 862, in eb_unknown
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 failure.trap(UnknownPowerType, NotImplementedError)
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/twisted/python/failure.py", line 359, in trap
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 self.raiseException()
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/twisted/python/failure.py", line 385, in raiseException
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 raise self.value.with_traceback(self.tb)
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 250, in inContext
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 result = inContext.theWork()
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 266, in <lambda>
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 inContext.theWork = lambda: context.call(ctx, func, *args, **kw)
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/twisted/python/context.py", line 122, in callWithContext
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 return self.currentContext().callWithContext(ctx, func, *args, **kw)
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 File "/usr/lib/python3/dist-packages/twisted/python/context.py", line 85, in callWithContext
Jul 30 20:10:03 uat-l-srv-90 sh[1330]: #011 return func(*args,**kw)
Jul 30 20:10:03 ua...