Openstack juno version and vmware vcenter

[el_mehdi_ora]

Hello, I followed the documentation  " http://docs.openstack.org/kilo/config-reference/content/vmware.html " to connect ESXi with OpenStack Juno, i put the following configuration on the compute node, nova.conf file :

[DEFAULT]

compute_driver=vmwareapi.

VMwareVCDriver

[vmware]
host_ip=<vCenter host IP>
host_username=<vCenter username>
host_password=<vCenter password>
cluster_name=<vCenter cluster name>
datastore_regex=<optional datastore regex>

And in the nova-compute.conf :

[DEFAULT]
compute_driver=vmwareapi.VMwareVCDriver

But in vain, on the juno OpenStack Dashboard when i whant to launch instance, i have error " Error: Failed to launch instance "Test": Please try again later [Error: No valid host was found. ]. ", plz there is an idea for launce instance in my ESXi.

attached the logs on the controller and compute node:

======> nova-conductor

ERROR nova.scheduler.utils [req-618d4ee3-c936-4249-9f8c-7c266d5f9264 None] [instance: 0c1ee287-edfe-4258-bb43-db23338bbe90] Error from last host: ComputeNode (node domain-c65(Compute)): [u'Traceback (most recent call last):\n', u'  File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 2054, in _do_build_and_run_instance\n    filter_properties)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 2185, in _build_and_run_instance\n    instance_uuid=instance.uuid, reason=six.text_type(e))\n', u'RescheduledException: Build of instance 0c1ee287-edfe-4258-bb43-db23338bbe90 was re-scheduled: Network could not be found for bridge br-int\n']
2015-09-17 15:31:34.921 2432 WARNING nova.scheduler.driver [req-618d4ee3-c936-4249-9f8c-7c266d5f9264 None] [instance: 0c1ee287-edfe-4258-bb43-db23338bbe90] NoValidHost exception with message: 'No valid host was found.'

=====> neutron
2015-09-17 12:36:09.398 1840 ERROR oslo.messaging._drivers.common [req-775407a3-d756-4677-bdb9-0ddfe2fac50c ] Returning exception More than one external network exists to caller
2015-09-17 12:36:09.398 1840 ERROR oslo.messaging._drivers.common [req-775407a3-d756-4677-bdb9-0ddfe2fac50c ] ['Traceback (most recent call last):\n', '  File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 134, in _dispatch_and_reply\n    incoming.message))\n', '  File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 177, in _dispatch\n    return self._do_dispatch(endpoint, method, ctxt, args)\n', '  File "/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 123, in _do_dispatch\n    result = getattr(endpoint, method)(ctxt, **new_args)\n', '  File "/usr/lib/python2.7/dist-packages/neutron/api/rpc/handlers/l3_rpc.py", line 149, in get_external_network_id\n    net_id = self.plugin.get_external_network_id(context)\n', '  File "/usr/lib/python2.7/dist-packages/neutron/db/external_net_db.py", line 161, in get_external_network_id\n    raise n_exc.TooManyExternalNetworks()\n', 'TooManyExternalNetworks: More than one external network exists\n']

=====>  compute Node / nova-compute

2015-09-17 15:28:22.323 5944 ERROR oslo.vmware.common.loopingcall [-] in fixed duration looping call
2015-09-17 15:31:33.550 5944 ERROR nova.compute.manager [-] [instance: 0c1ee287-edfe-4258-bb43-db23338bbe90] Instance failed to spawn

=====> nova-network / nova-compute

2015-09-17 11:21:10.840 1363 ERROR oslo.messaging._drivers.impl_

rabbit [-] AMQP server on ControllerNode01:5672 is unreachable: [Errno 111] ECONNREFUSED. Trying again in 3 seconds.
2015-09-17 11:23:02.874 1363 ERROR nova.openstack.common.periodic_task [-] Error during VlanManager._disassociate_stale_fixed_ips: Timed out waiting for a reply to message ID b6d62061352e4590a37cbc0438ea3ef0