Public bug reported:

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

** Affects: maas (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

- Testing MAAS on OpenStack environment, but got Power error from the first 
instance.
+ 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
+         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

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https://bugs.launchpad.net/bugs/1640671

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

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