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[Bug 1665548] [NEW] nova fail to evacuate as wrong onSharedStorarge parameter

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: int32bit <krystism@xxxxxxxxx>
Date: Fri, 17 Feb 2017 06:25:30 -0000
Reply-to: Bug 1665548 <1665548@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

Nova API removed onSharedStorage parameter after v2.14, but we still
have many users use API under v2.14. And we found that nova 100% fail to
evacuate a server via novaclient, the error log as follows:

2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher [req-b34b79d6-20ed-4488-b8d5-98f4007eb12e 681041a7364d4852930021d009c8dc2b bafaf53fac4346b9bcd6a77cf964b7af - - -] Exception during message handling: Invalid state of instance files on shared storage
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher Traceback (most recent call last):
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 138, in _dispatch_and_reply
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     incoming.message))
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 183, in _dispatch
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return self._do_dispatch(endpoint, method, ctxt, args)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 127, in _do_dispatch
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     result = func(ctxt, **new_args)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 150, in inner
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return func(*args, **kwargs)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/exception.py", line 110, in wrapped
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     payload)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/exception.py", line 89, in wrapped
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return f(self, context, *args, **kw)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 359, in decorated_function
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     LOG.warning(msg, e, instance=instance)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 328, in decorated_function
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 409, in decorated_function
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 387, in decorated_function
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     kwargs['instance'], e, sys.exc_info())
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 375, in decorated_function
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2809, in rebuild_instance
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     bdms, recreate, on_shared_storage, preserve_ephemeral)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2853, in _do_rebuild_instance_with_claim
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self._do_rebuild_instance(*args, **kwargs)
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2885, in _do_rebuild_instance
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     _("Invalid state of instance files on shared"
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher InvalidSharedStorage: Invalid state of instance files on shared storage
2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher

I dug into the API source, and I found that the onSharedStorage will
force to be converted to False value, even if in fact its value is None:

https://github.com/openstack/nova/blob/master/nova/api/openstack/compute/evacuate.py#L43-L48

In other word, If we didn't pass this arguments, we will actually pass
the False value. If we use shared-storage, it will not match the value
getting from the backend driver.

** Affects: nova
     Importance: Undecided
         Status: New

** Description changed:

- Nova API removed onSharedStorage parameter after v2.14, but we have many
- user to API under v2.14. And we found that nova 100% fail to evacuate a
- server via novaclient, the error log as follows:
+ Nova API removed onSharedStorage parameter after v2.14, but we still
+ have many users use API under v2.14. And we found that nova 100% fail to
+ evacuate a server via novaclient, the error log as follows:
  
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher [req-b34b79d6-20ed-4488-b8d5-98f4007eb12e 681041a7364d4852930021d009c8dc2b bafaf53fac4346b9bcd6a77cf964b7af - - -] Exception during message handling: Invalid state of instance files on shared storage
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher Traceback (most recent call last):
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 138, in _dispatch_and_reply
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     incoming.message))
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 183, in _dispatch
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return self._do_dispatch(endpoint, method, ctxt, args)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 127, in _do_dispatch
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     result = func(ctxt, **new_args)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 150, in inner
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return func(*args, **kwargs)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/exception.py", line 110, in wrapped
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     payload)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/exception.py", line 89, in wrapped
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return f(self, context, *args, **kw)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 359, in decorated_function
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     LOG.warning(msg, e, instance=instance)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 328, in decorated_function
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 409, in decorated_function
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 387, in decorated_function
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     kwargs['instance'], e, sys.exc_info())
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 375, in decorated_function
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2809, in rebuild_instance
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     bdms, recreate, on_shared_storage, preserve_ephemeral)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2853, in _do_rebuild_instance_with_claim
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self._do_rebuild_instance(*args, **kwargs)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2885, in _do_rebuild_instance
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     _("Invalid state of instance files on shared"
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher InvalidSharedStorage: Invalid state of instance files on shared storage
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher
  
- I dig into the API source, and I found that the onSharedStorage will
- force to be converted to False, even if in fact its value is None:
+ I dug into the API source, and I found that the onSharedStorage will
+ force to be converted to False value, even if in fact its value is None:
  
  https://github.com/openstack/nova/blob/master/nova/api/openstack/compute/evacuate.py#L43-L48
  
- In other words, If we didn't pass this arguments, we will actually pass
+ In other word, If we didn't pass this arguments, we will actually pass
  the False value. If we use shared-storage, it will not match the value
- from backend driver.
+ getting from the backend driver.

-- 
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https://bugs.launchpad.net/bugs/1665548

Title:
  nova fail to evacuate as wrong onSharedStorarge parameter

Status in OpenStack Compute (nova):
  New

Bug description:
  Nova API removed onSharedStorage parameter after v2.14, but we still
  have many users use API under v2.14. And we found that nova 100% fail
  to evacuate a server via novaclient, the error log as follows:

  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher [req-b34b79d6-20ed-4488-b8d5-98f4007eb12e 681041a7364d4852930021d009c8dc2b bafaf53fac4346b9bcd6a77cf964b7af - - -] Exception during message handling: Invalid state of instance files on shared storage
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher Traceback (most recent call last):
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 138, in _dispatch_and_reply
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     incoming.message))
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 183, in _dispatch
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return self._do_dispatch(endpoint, method, ctxt, args)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 127, in _do_dispatch
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     result = func(ctxt, **new_args)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 150, in inner
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return func(*args, **kwargs)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/exception.py", line 110, in wrapped
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     payload)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/exception.py", line 89, in wrapped
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return f(self, context, *args, **kw)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 359, in decorated_function
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     LOG.warning(msg, e, instance=instance)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 328, in decorated_function
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 409, in decorated_function
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 387, in decorated_function
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     kwargs['instance'], e, sys.exc_info())
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 375, in decorated_function
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2809, in rebuild_instance
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     bdms, recreate, on_shared_storage, preserve_ephemeral)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2853, in _do_rebuild_instance_with_claim
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     self._do_rebuild_instance(*args, **kwargs)
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2885, in _do_rebuild_instance
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher     _("Invalid state of instance files on shared"
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher InvalidSharedStorage: Invalid state of instance files on shared storage
  2017-02-16 20:22:48.106 6144 ERROR oslo_messaging.rpc.dispatcher

  I dug into the API source, and I found that the onSharedStorage will
  force to be converted to False value, even if in fact its value is
  None:

  https://github.com/openstack/nova/blob/master/nova/api/openstack/compute/evacuate.py#L43-L48

  In other word, If we didn't pass this arguments, we will actually pass
  the False value. If we use shared-storage, it will not match the value
  getting from the backend driver.

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Follow ups

[Bug 1665548] Re: nova fail to evacuate as wrong onSharedStorarge parameter
From: Sylvain Bauza, 2017-02-23