RE: neutron network namespaces not create

22 May 2019


      Hi,
Thanks a lot Slawomir & Michael for your quick response. 
I found that my neutron-server is not getting able to create namespace. I restart all service but not work. After that I reboot three controller one by one. After that it start creating namespaces.
Thanks & B'Rgds,
Rony
-----Original Message-----
From: Slawomir Kaplonski [mailto:skaplons@redhat.com] 
Sent: Wednesday, May 22, 2019 10:51 AM
To: OpenStack Discuss
Subject: Re: neutron network namespaces not create
Hi,
Yes, Michael is right. This error message is probably suspicious :) So, in ML2/OVS its neutron-ovs-agent who should create br-int during the start. It’s in [1].
So is neutron-openvswitch-agent running on Your node?
Or maybe if You are using some other solution rather than ML2/OVS, maybe You should change to other than “openvswitch” interface driver in neutron-l3-agent’s config?
[1] https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers...
...
On 22 May 2019, at 03:19, Michael Richardson michaelr@catalyst.net.nz wrote:
Hi Rony,
Based on this line:
...
BridgeDoesNotExist: Bridge br-int does not exist
...it looks as if your SDN-provider-of-choice (OVS ?) may need some attention.  As a wild stab in the dark, is the bridge defined in bridge_mappings, for the default bridge, present, and available to be patched (hypothetically via OVS, or another provider) to br-int ?
Cheers,
Michael.
On 22/05/19 2:53 AM, Md. Farhad Hasan Khan wrote:
...
Hi,
I can create router from horizon. But network namespaces not created. I check with # ip netns list command. Not found router ID, but showing in horizon.
Here is some log I get from neutron:
#cat /var/log/neutron/l3-agent.log
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent [-] Error while deleting router cad85ce0-6624-42ff-b42b-09480aea2613: OSError: [Errno 2] No such file or directory: '/var/lib/neutron/ha_confs/cad85ce0-6624-42ff-b42b-09480aea2613'
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent Traceback (most recent call last):
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/l3/agent.py", line 372, in _router_added
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     ri.delete()
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/l3/ha_router.py", line 452, in delete
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     self.disable_keepalived()
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/l3/ha_router.py", line 178, in disable_keepalived
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     shutil.rmtree(conf_dir)
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib64/python2.7/shutil.py", line 239, in rmtree
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     onerror(os.listdir, path, sys.exc_info())
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib64/python2.7/shutil.py", line 237, in rmtree
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     names = os.listdir(path)
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent OSError: [Errno 2] No such file or directory: '/var/lib/neutron/ha_confs/cad85ce0-6624-42ff-b42b-09480aea2613'
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent [-] Failed to process compatible router: cad85ce0-6624-42ff-b42b-09480aea2613: BridgeDoesNotExist: Bridge br-int does not exist.
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent Traceback (most recent call last):
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/l3/agent.py", line 562, in _process_router_update
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     self._process_router_if_compatible(router)
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/l3/agent.py", line 481, in _process_router_if_compatible
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     self._process_added_router(router)
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/l3/agent.py", line 486, in _process_added_router
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     self._router_added(router['id'], router)
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/l3/agent.py", line 375, in _router_added
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     router_id)
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     self.force_reraise()
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     six.reraise(self.type_, self.value, self.tb)
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/l3/agent.py", line 364, in _router_added
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     ri.initialize(self.process_monitor)
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/l3/ha_router.py", line 128, in initialize
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     self.ha_network_added()
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/l3/ha_router.py", line 198, in ha_network_added
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     mtu=self.ha_port.get('mtu'))
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/interface.py", line 263, in plug
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     bridge, namespace, prefix, mtu)
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/interface.py", line 346, in plug_new
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     self.check_bridge_exists(bridge)
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/interface.py", line 221, in check_bridge_exists
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent     raise exceptions.BridgeDoesNotExist(bridge=bridge)
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent BridgeDoesNotExist: Bridge br-int does not exist.
2019-05-21 17:37:12.640 52248 ERROR neutron.agent.l3.agent
2019-05-21 17:37:13.024 52248 WARNING neutron.agent.l3.agent [-] Info 
for router cad85ce0-6624-42ff-b42b-09480aea2613 was not found. 
Performing router cleanup
2019-05-21 17:37:14.358 52248 WARNING neutron.agent.l3.agent [-] Info 
for router cad85ce0-6624-42ff-b42b-09480aea2613 was not found. 
Performing router cleanup Thanks & B’Rgds, Rony
--
Michael Richardson
Catalyst Cloud || Catalyst IT Limited
150-154 Willis Street, PO Box 11-053 Wellington New Zealand 
http://catalyst.net.nz
GPG: 0530 4686 F996 4E2C 5DC7 6327 5C98 5EED A302
—
Slawek Kaplonski
Senior software engineer
Red Hat