[neutron] Unable to configure multiple external networks

valleru at cbio.mskcc.org valleru at cbio.mskcc.org
Mon May 6 13:39:56 UTC 2019


Thank you Slawek,

Yes - I see that it is a reported bug.
Will keep a track.

Regards,
Lohit
On May 6, 2019, 4:51 AM -0500, Slawomir Kaplonski <skaplons at redhat.com>, wrote:
> Hi,
>
> It is known and already reported issue. Please see https://bugs.launchpad.net/neutron/+bug/1824571
>
> > On 6 May 2019, at 09:58, valleru at cbio.mskcc.org wrote:
> >
> > It started to work , after i modified this code:
> >
> > def _fetch_external_net_id(self, force=False):
> > """Find UUID of single external network for this agent."""
> > self.conf.gateway_external_network_id = ''
> > #if self.conf.gateway_external_network_id:
> > # return self.conf.gateway_external_network_id
> > return self.conf.gateway_external_network_id
> >
> > from https://github.com/openstack/neutron/blob/master/neutron/agent/l3/agent.py
> >
> > Looks like, that respective option is not being read correctly from the respective configuration file.
> >
> > Regards,
> > Lohit
> >
> > On May 6, 2019, 2:28 AM -0500, valleru at cbio.mskcc.org, wrote:
> > > Hello All,
> > >
> > > I am trying to install Openstack Stein on a single node, with multiple external networks (both networks are also shared).
> > > However, i keep getting the following error in the logs, and the router interfaces show as down.
> > >
> > > 2019-05-06 02:19:45.046 52175 ERROR neutron.agent.l3.agent
> > > 2019-05-06 02:19:45.048 52175 INFO neutron.agent.l3.agent [-] Starting router update for a2ec6c99-944e-408a-945a-dffbe09f65ce, action 3, priority 2
> > > 2019-05-06 02:19:46.249 52175 ERROR neutron.agent.l3.agent [-] Failed to process compatible router: a2ec6c99-944e-408a-945a-dffbe09f65ce: Exception: The 'gateway_external_network_id' option must be configured for this agent as Neutron has more than one external network.
> > > 2019-05-06 02:19:46.249 52175 ERROR neutron.agent.l3.agent Traceback (most recent call last):
> > > 2019-05-06 02:19:46.249 52175 ERROR neutron.agent.l3.agent File "/usr/lib/python2.7/site-packages/neutron/agent/l3/agent.py", line 701, in _process_routers_if_compatible
> > > 2019-05-06 02:19:46.249 52175 ERROR neutron.agent.l3.agent self._process_router_if_compatible(router)
> > > 2019-05-06 02:19:46.249 52175 ERROR neutron.agent.l3.agent File "/usr/lib/python2.7/site-packages/neutron/agent/l3/agent.py", line 548, in _process_router_if_compatible
> > > 2019-05-06 02:19:46.249 52175 ERROR neutron.agent.l3.agent target_ex_net_id = self._fetch_external_net_id()
> > > 2019-05-06 02:19:46.249 52175 ERROR neutron.agent.l3.agent File "/usr/lib/python2.7/site-packages/neutron/agent/l3/agent.py", line 376, in _fetch_external_net_id
> > > 2019-05-06 02:19:46.249 52175 ERROR neutron.agent.l3.agent raise Exception(msg)
> > > 2019-05-06 02:19:46.249 52175 ERROR neutron.agent.l3.agent Exception: The 'gateway_external_network_id' option must be configured for this agent as Neutron has more than one external network.
> > > 2019-05-06 02:19:46.249 52175 ERROR neutron.agent.l3.agent
> > > 2019-05-06 02:19:46.252 52175 WARNING neutron.agent.l3.agent [-] Hit retry limit with router update for a2ec6c99-944e-408a-945a-dffbe09f65ce, action 3
> > > 2019-05-06 02:19:46.253 52175 WARNING neutron.agent.l3.agent [-] Info for router a2ec6c99-944e-408a-945a-dffbe09f65ce was not found. Performing router cleanup
> > >
> > >
> > > I have set these parameters to empty, as mentioned in the docs.
> > >
> > > /etc/neutron/l3_agent.ini
> > >
> > > gateway_external_network_id =
> > > external_network_bridge =
> > > interface_driver = openvswitch
> > >
> > > I tried linuxbridge-agent too,but i could not get rid of the above error.
> > >
> > > openstack port list --router router1
> > >
> > > +--------------------------------------+------+-------------------+----------------------------------------------------------------------------+--------+
> > > | ID | Name | MAC Address | Fixed IP Addresses | Status |
> > > +--------------------------------------+------+-------------------+----------------------------------------------------------------------------+--------+
> > > | 1bcaad17-17ed-4383-9206-34417f8fd2df | | fa:16:3e:c1:b1:1f | ip_address='192.168.1.1', subnet_id='b00cb3bf-ca89-4e00-8bd7-83a75dbb6080' | DOWN |
> > > | f49d976f-b733-4360-9d1f-cdd35ecf54e6 | | fa:16:3e:54:82:4b | ip_address='10.0.10.11', subnet_id='7cc01a33-f078-494d-9b0b-e988f5b4915d' | DOWN |
> > > +--------------------------------------+------+-------------------+----------------------------------------------------------------------------+————+
> > >
> > > However it does work when i have just one external network
> > >
> > > openstack port list --router router1
> > > +--------------------------------------+------+-------------------+--------------------------------------------------------------------------------+--------+
> > > | ID | Name | MAC Address | Fixed IP Addresses | Status |
> > > +--------------------------------------+------+-------------------+--------------------------------------------------------------------------------+--------+
> > > | cdb06cf7-7492-4275-bd93-88a46b9769a8 | | fa:16:3e:7c:ea:55 | ip_address='192.168.1.1', subnet_id='b00cb3bf-ca89-4e00-8bd7-83a75dbb6080' | ACTIVE |
> > > | fc9b06d7-d377-451b-9af5-07e1fab072dc | | fa:16:3e:d0:6d:7c | ip_address='140.163.188.149', subnet_id='4a2bf30a-e7f8-44c1-8b08-4de01b2b1296' | ACTIVE |
> > > +--------------------------------------+------+-------------------+--------------------------------------------------------------------------------+--------+
> > >
> > > May i please know, how to get the above working.
> > > I have seen multiple articles online that mention that this should be working, however i am unable to get this to work.
> > > It is really important for us to have to have 2 external networks in the environment, and be able to route to both of them if possible.
> > >
> > >
> > > Thank you,
> > > Lohit
> > >
>
>> Slawek Kaplonski
> Senior software engineer
> Red Hat
>
>
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