Open Stack

Hello!

First of all I want to say, that aggregate function isn't working at 
all, but it is solved by this post: 
https://ask.openstack.org/en/question/8392/aggregate-hosts/
After fixing sources aggregate is working now, I can add master and 
second host to pool (second host's node-compute successfully reboots and 
host adds to pool).
But after adding second host I got problem with second hosts 
nova-compute, it won't start:

2013-12-12 09:52:08.114 13238 INFO nova.openstack.common.periodic_task 
[-] Skipping periodic task _periodic_update_dns because its interval is 
negative
2013-12-12 09:52:08.166 13238 INFO nova.virt.driver [-] Loading compute 
driver 'xenapi.XenAPIDriver'
2013-12-12 09:52:08.535 13238 CRITICAL nova [-] 'XenAPISession' object 
has no attribute '_virtapi'
2013-12-12 09:52:08.535 13238 TRACE nova Traceback (most recent call last):
2013-12-12 09:52:08.535 13238 TRACE nova   File "/usr/bin/nova-compute", 
line 10, in <module>
2013-12-12 09:52:08.535 13238 TRACE nova     sys.exit(main())
2013-12-12 09:52:08.535 13238 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/cmd/compute.py", line 68, in main
2013-12-12 09:52:08.535 13238 TRACE nova     db_allowed=False)
2013-12-12 09:52:08.535 13238 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/service.py", line 257, in create
2013-12-12 09:52:08.535 13238 TRACE nova     db_allowed=db_allowed)
2013-12-12 09:52:08.535 13238 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/service.py", line 139, in __init__
2013-12-12 09:52:08.535 13238 TRACE nova     self.manager = 
manager_class(host=self.host, *args, **kwargs)
2013-12-12 09:52:08.535 13238 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 450, in 
__init__
2013-12-12 09:52:08.535 13238 TRACE nova     self.driver = 
driver.load_compute_driver(self.virtapi, compute_driver)
2013-12-12 09:52:08.535 13238 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/virt/driver.py", line 1108, in 
load_compute_driver
2013-12-12 09:52:08.535 13238 TRACE nova     virtapi)
2013-12-12 09:52:08.535 13238 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/openstack/common/importutils.py", 
line 52, in import_object_ns
2013-12-12 09:52:08.535 13238 TRACE nova     return 
import_class(import_value)(*args, **kwargs)
2013-12-12 09:52:08.535 13238 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/virt/xenapi/driver.py", line 142, 
in __init__
2013-12-12 09:52:08.535 13238 TRACE nova     self._session = 
XenAPISession(url, username, password, self.virtapi)
2013-12-12 09:52:08.535 13238 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/virt/xenapi/driver.py", line 666, 
in __init__
2013-12-12 09:52:08.535 13238 TRACE nova     self.host_uuid = 
self._get_host_uuid()
2013-12-12 09:52:08.535 13238 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/virt/xenapi/driver.py", line 698, 
in _get_host_uuid
2013-12-12 09:52:08.535 13238 TRACE nova     aggr = 
self._virtapi.aggregate_get_by_host(
2013-12-12 09:52:08.535 13238 TRACE nova AttributeError: 'XenAPISession' 
object has no attribute '_virtapi'
2013-12-12 09:52:08.535 13238 TRACE nova

I discover, that I can't set up nova-compute on "second host" in 
XenServer pool which is created by XenServer (without OpenStack 
aggregate), error is same. To master host nova-compute connects 
successfully. I tested this in two different XenServer 6.2 pools.
Is there some solution how can start to work "second host's" nova-computes?

Thanks.
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