Elanchezian Settu elanchezian.settu at gigamon.com
Fri Jul 19 07:00:00 UTC 2019

Hi Erik,

Thanks for your response. Getting below error message when I execute the command in compute node. Could this be the reason?

ubuntu at os-compute-01:~$ nova-manage cell_v2 discover_hosts --verbose
/usr/local/lib/python2.7/dist-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>.
An error has occurred:
Traceback (most recent call last):
  File "/opt/stack/nova/nova/cmd/manage.py", line 2371, in main
    ret = fn(*fn_args, **fn_kwargs)
  File "/opt/stack/nova/nova/cmd/manage.py", line 1473, in discover_hosts
  File "/opt/stack/nova/nova/objects/host_mapping.py", line 248, in discover_hosts
    cell_mappings = objects.CellMappingList.get_all(ctxt)
  File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 184, in wrapper
    result = fn(cls, context, *args, **kwargs)
  File "/opt/stack/nova/nova/objects/cell_mapping.py", line 256, in get_all
    db_mappings = cls._get_all_from_db(context)
  File "/usr/local/lib/python2.7/dist-packages/oslo_db/sqlalchemy/enginefacade.py", line 1011, in wrapper
    with self._transaction_scope(context):
  File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/usr/local/lib/python2.7/dist-packages/oslo_db/sqlalchemy/enginefacade.py", line 1061, in _transaction_scope
    context=context) as resource:
  File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/usr/local/lib/python2.7/dist-packages/oslo_db/sqlalchemy/enginefacade.py", line 659, in _session
    bind=self.connection, mode=self.mode)
  File "/usr/local/lib/python2.7/dist-packages/oslo_db/sqlalchemy/enginefacade.py", line 418, in _create_session
  File "/usr/local/lib/python2.7/dist-packages/oslo_db/sqlalchemy/enginefacade.py", line 510, in _start
    engine_args, maker_args)
  File "/usr/local/lib/python2.7/dist-packages/oslo_db/sqlalchemy/enginefacade.py", line 532, in _setup_for_connection
    "No sql_connection parameter is established")
CantStartEngineError: No sql_connection parameter is established

Thanks & Regards,

From: Erik Olof Gunnar Andersson [mailto:eandersson at blizzard.com]
Sent: Friday, July 19, 2019 1:41 AM
To: Li, Cheng1; Elanchezian Settu; openstack-dev at lists.openstack.org
Subject: RE: [networking-ovs-dpdk

Maybe the compute isn't yet mapped to the cell.

?  nova-manage cell_v2 discover_hosts --verbose

Best Regards, Erik Olof Gunnar Andersson

From: Li, Cheng1 <cheng1.li at intel.com<mailto:cheng1.li at intel.com>>
Sent: Wednesday, July 17, 2019 7:00 PM
To: Elanchezian Settu <elanchezian.settu at gigamon.com<mailto:elanchezian.settu at gigamon.com>>; openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>
Subject: RE: [networking-ovs-dpdk

Please check the nova-compute log on os-compute-01 to see if any useful info.
It may locate at /var/log/nova/


From: Elanchezian Settu [mailto:elanchezian.settu at gigamon.com]
Sent: Wednesday, July 17, 2019 2:14 PM
To: openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>
Subject: [networking-ovs-dpdk


I'm trying to setup a multi-node OpenStack environment with OVS-DPDK. Unfortunately I'm running into issue that compute node not getting listed in hypervisor list as below screenshot. Due to this I'm unable to create instances on compute node.

Herewith I had attached the local.conf files of both controller and compute node. Can someone help me to resolve this issue.

Thanks & Regards,

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