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[Bug 1669985] [NEW] linuxbridge-agent eValueError('I/O operation on closed file

 

Public bug reported:

compute  node 
openstack newton version


[root@node1 ~]# tail -f /var/log/neutron/linuxbridge-agent.log
2017-03-04 17:38:45.394 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent [req-abd694a7-2f77-40e9-9929-5b642ab7b071 - - - - -] Error in agent loop. Devices info: {'current': set(['tapad1d6370-19']), 'timestamps': {'tapad1d6370-19': 1258}, 'removed': set(['tap8c47f24c-97', 'tape3dd752e-25', 'tap6575acab-b9', 'tap1dce27f5-bd', 'tapbfd8c8e2-3c', 'tapefe15085-96', 'tape19050ac-97', 'tapfab348e4-3e', 'tapfd528967-e6', 'tap93bddc4a-74', 'tap949c7c81-24', 'tap444571a3-dd', 'tapda41ad51-d2', 'tapcfcab1a6-8a', 'tapdd5330f9-47', 'tapa9cd3d90-45', 'tap35f3820d-44', 'tap95bb9241-e0', 'tapc0e33010-44', 'tap421d25c5-92', 'tap0753a059-b5', 'tap6a6754b3-a2', 'tap039c9322-c2', 'tap09df307e-33', 'tapccae4ec5-3d', 'tap1a3a376d-ba', 'tapcc81a48f-f3', 'tapbb555cdd-3d', 'tap5d5f50f0-cd', 'tap2274cf1d-fb', 'tapf4357e9b-c2', 'tap5683264f-fc', 'tapce7e3b23-75', 'tap8dfdfaef-55', 'tap06c9112d-27', 'tapc2fe9044-bc', 'tapf9d01072-bb', 'tap7ac1ad8f-c1', 'tapa4ee562e-fb', 'tap290292f4-37', 'tap853106fc-ad', 'tap1443d1dc-67', 'tapceb2dc8f-81', 'tap15c131b5-f9', 'tap9fc9b069-cd', 'tapdc8be820-0b', 'tapf1212ebf-ae', 'tap5730c7f8-be', 'tapa2e43cb0-fd', 'tap2f56f3b1-b7', 'tap6e3fa571-89', 'tapc6e56577-06', 'tap01404725-41', 'tap07f2c8fd-28', 'tap9dbec9d4-f4', 'tap5d0ea5be-96', 'tap2c878077-73', 'tapb4cc646f-c8', 'tap5912513d-f6', 'tapf254051d-54', 'tap7e8fcfc6-99', 'tap063cabd0-ef', 'tap10216d05-48', 'tap8290d45b-0f', 'taped2997d4-fb', 'tapaf34f472-bd', 'tap01886a3f-c8', 'tapd9490849-17', 'tapabef7840-f2', 'tapad4eb233-99', 'tap6f452a23-09', 'tap4a19b66b-e3', 'tapc4b2d4b8-b1', 'tap8e9b28a4-6e', 'tapc096bfcb-8e', 'tap80731222-c7', 'tap9645bedf-16', 'tapbf6d5b68-7b', 'tap485fd80a-3f', 'tap982833a7-7f', 'tap006ca4eb-ec', 'tapd00cebd0-1a', 'tap1996b657-ca', 'tapa604d1c9-96', 'tap0df4f7b1-f0', 'tap221a09c6-ba', 'tapd14aeca9-99', 'tap33f9066e-81', 'tap16386362-92', 'tap9757b22e-4b', 'tap7efcc9e4-78', 'tapff1f4a59-7d']), 'added': set(['tapad1d6370-19']), 'updated': set(['tapdc8be820-0b', 'tapf1212ebf-ae', 'tap5d0ea5be-96', 'tap2f56f3b1-b7', 'tap8c47f24c-97', 'tapa2e43cb0-fd', 'tap1dce27f5-bd', 'tap2c878077-73', 'tapb4cc646f-c8', 'tape19050ac-97', 'tapfab348e4-3e', 'tapfd528967-e6', 'tapefe15085-96', 'tapa9cd3d90-45', 'tap10216d05-48', 'tapaf34f472-bd', 'tap6a6754b3-a2', 'tap01886a3f-c8', 'tap6e3fa571-89', 'tap09df307e-33', 'tap1a3a376d-ba', 'tap5d5f50f0-cd', 'tapc4b2d4b8-b1', 'tapf254051d-54', u'tap80731222-c7', 'tap9645bedf-16', 'tap221a09c6-ba', 'tap93bddc4a-74', 'tap1443d1dc-67', u'tap8dfdfaef-55', 'tap06c9112d-27', 'tapc2fe9044-bc', 'tap2274cf1d-fb', 'tap7ac1ad8f-c1', 'tap01404725-41', 'tap4a19b66b-e3', 'tap9757b22e-4b', 'tapbb555cdd-3d', 'tap15c131b5-f9'])}
2017-03-04 17:38:45.394 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent Traceback (most 
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent Traceback (most recent call last):
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/agent/_common_agent.py", line 452, in daemon_loop
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     sync = self.process_network_devices(device_info)
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/osprofiler/profiler.py", line 154, in wrapper
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     return f(*args, **kwargs)
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/agent/_common_agent.py", line 212, in process_network_devices
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     resync_b = self.treat_devices_removed(device_info['removed'])
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/osprofiler/profiler.py", line 154, in wrapper
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     return f(*args, **kwargs)
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/agent/_common_agent.py", line 330, in treat_devices_removed
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     self.sg_agent.remove_devices_filter(devices)
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/securitygroups_rpc.py", line 226, in remove_devices_filter
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     self.firewall.remove_port_filter(device)
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_firewall.py", line 214, in remove_port_filter
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     self._remove_conntrack_entries_from_port_deleted(port)
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_firewall.py", line 185, in _remove_conntrack_entries_from_port_deleted
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     [device_info], ethertype, set())
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_conntrack.py", line 94, in delete_conntrack_state_by_remote_ips
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     self._delete_conntrack_state(device_info_list, rule)
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_conntrack.py", line 76, in _delete_conntrack_state
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     extra_ok_codes=[1])
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 120, in execute
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     execute_rootwrap_daemon(cmd, process_input, addl_env))
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 107, in execute_rootwrap_daemon
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     return client.execute(cmd, process_input)
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/oslo_rootwrap/client.py", line 128, in execute
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     res = proxy.run_one_command(cmd, stdin)
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "<string>", line 2, in run_one_command
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib64/python2.7/multiprocessing/managers.py", line 773, in _callmethod
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     raise convert_to_error(kind, result)
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent RemoteError: 
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent ---------------------------------------------------------------------------
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent Unserializable message: ('#ERROR', ValueError('I/O operation on closed file',))
2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent ---------------------------------------------------------------------------



[root@node1 ~]# egrep -v "^#|^$" /etc/neutron/plugins/ml2/linuxbridge_agent.ini 
[DEFAULT]
[agent]
[linux_bridge]
physical_interface_mappings =provider:team1
[securitygroup]
enable_security_group = True
firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
[vxlan]
enable_vxlan = False


[root@node1 ~]# egrep -v "^#|^$" /etc/neutron/neutron.conf 
[DEFAULT]
auth_strategy = keystone
[agent]
[cors]
[cors.subdomain]
[database]
[keystone_authtoken]
auth_uri = http://172.16.21.100:5000
auth_url = http://172.16.21.100:35357
memcached_servers = 172.16.21.4:11211,172.16.21.5:11211
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = neutron
password = 123456
[matchmaker_redis]
[nova]
[oslo_concurrency]
lock_path = /var/lib/neutron/tmp
[oslo_messaging_amqp]
[oslo_messaging_notifications]
[oslo_messaging_rabbit]
rabbit_hosts=172.16.21.4:5673, 172.16.21.5:5673
rabbit_userid=openstack
rabbit_password=RABBIT_PASS
rabbit_ha_queues = true
[oslo_messaging_zmq]
[oslo_middleware]
[oslo_policy]
[qos]
[quotas]
[ssl]

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: error linuxbridge

** Attachment added: "linuxagent01.png"
   https://bugs.launchpad.net/bugs/1669985/+attachment/4831248/+files/linuxagent01.png

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https://bugs.launchpad.net/bugs/1669985

Title:
  linuxbridge-agent    eValueError('I/O operation on closed file

Status in neutron:
  New

Bug description:
  compute  node 
  openstack newton version

  
  [root@node1 ~]# tail -f /var/log/neutron/linuxbridge-agent.log
  2017-03-04 17:38:45.394 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent [req-abd694a7-2f77-40e9-9929-5b642ab7b071 - - - - -] Error in agent loop. Devices info: {'current': set(['tapad1d6370-19']), 'timestamps': {'tapad1d6370-19': 1258}, 'removed': set(['tap8c47f24c-97', 'tape3dd752e-25', 'tap6575acab-b9', 'tap1dce27f5-bd', 'tapbfd8c8e2-3c', 'tapefe15085-96', 'tape19050ac-97', 'tapfab348e4-3e', 'tapfd528967-e6', 'tap93bddc4a-74', 'tap949c7c81-24', 'tap444571a3-dd', 'tapda41ad51-d2', 'tapcfcab1a6-8a', 'tapdd5330f9-47', 'tapa9cd3d90-45', 'tap35f3820d-44', 'tap95bb9241-e0', 'tapc0e33010-44', 'tap421d25c5-92', 'tap0753a059-b5', 'tap6a6754b3-a2', 'tap039c9322-c2', 'tap09df307e-33', 'tapccae4ec5-3d', 'tap1a3a376d-ba', 'tapcc81a48f-f3', 'tapbb555cdd-3d', 'tap5d5f50f0-cd', 'tap2274cf1d-fb', 'tapf4357e9b-c2', 'tap5683264f-fc', 'tapce7e3b23-75', 'tap8dfdfaef-55', 'tap06c9112d-27', 'tapc2fe9044-bc', 'tapf9d01072-bb', 'tap7ac1ad8f-c1', 'tapa4ee562e-fb', 'tap290292f4-37', 'tap853106fc-ad', 'tap1443d1dc-67', 'tapceb2dc8f-81', 'tap15c131b5-f9', 'tap9fc9b069-cd', 'tapdc8be820-0b', 'tapf1212ebf-ae', 'tap5730c7f8-be', 'tapa2e43cb0-fd', 'tap2f56f3b1-b7', 'tap6e3fa571-89', 'tapc6e56577-06', 'tap01404725-41', 'tap07f2c8fd-28', 'tap9dbec9d4-f4', 'tap5d0ea5be-96', 'tap2c878077-73', 'tapb4cc646f-c8', 'tap5912513d-f6', 'tapf254051d-54', 'tap7e8fcfc6-99', 'tap063cabd0-ef', 'tap10216d05-48', 'tap8290d45b-0f', 'taped2997d4-fb', 'tapaf34f472-bd', 'tap01886a3f-c8', 'tapd9490849-17', 'tapabef7840-f2', 'tapad4eb233-99', 'tap6f452a23-09', 'tap4a19b66b-e3', 'tapc4b2d4b8-b1', 'tap8e9b28a4-6e', 'tapc096bfcb-8e', 'tap80731222-c7', 'tap9645bedf-16', 'tapbf6d5b68-7b', 'tap485fd80a-3f', 'tap982833a7-7f', 'tap006ca4eb-ec', 'tapd00cebd0-1a', 'tap1996b657-ca', 'tapa604d1c9-96', 'tap0df4f7b1-f0', 'tap221a09c6-ba', 'tapd14aeca9-99', 'tap33f9066e-81', 'tap16386362-92', 'tap9757b22e-4b', 'tap7efcc9e4-78', 'tapff1f4a59-7d']), 'added': set(['tapad1d6370-19']), 'updated': set(['tapdc8be820-0b', 'tapf1212ebf-ae', 'tap5d0ea5be-96', 'tap2f56f3b1-b7', 'tap8c47f24c-97', 'tapa2e43cb0-fd', 'tap1dce27f5-bd', 'tap2c878077-73', 'tapb4cc646f-c8', 'tape19050ac-97', 'tapfab348e4-3e', 'tapfd528967-e6', 'tapefe15085-96', 'tapa9cd3d90-45', 'tap10216d05-48', 'tapaf34f472-bd', 'tap6a6754b3-a2', 'tap01886a3f-c8', 'tap6e3fa571-89', 'tap09df307e-33', 'tap1a3a376d-ba', 'tap5d5f50f0-cd', 'tapc4b2d4b8-b1', 'tapf254051d-54', u'tap80731222-c7', 'tap9645bedf-16', 'tap221a09c6-ba', 'tap93bddc4a-74', 'tap1443d1dc-67', u'tap8dfdfaef-55', 'tap06c9112d-27', 'tapc2fe9044-bc', 'tap2274cf1d-fb', 'tap7ac1ad8f-c1', 'tap01404725-41', 'tap4a19b66b-e3', 'tap9757b22e-4b', 'tapbb555cdd-3d', 'tap15c131b5-f9'])}
  2017-03-04 17:38:45.394 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent Traceback (most 
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent Traceback (most recent call last):
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/agent/_common_agent.py", line 452, in daemon_loop
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     sync = self.process_network_devices(device_info)
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/osprofiler/profiler.py", line 154, in wrapper
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     return f(*args, **kwargs)
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/agent/_common_agent.py", line 212, in process_network_devices
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     resync_b = self.treat_devices_removed(device_info['removed'])
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/osprofiler/profiler.py", line 154, in wrapper
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     return f(*args, **kwargs)
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/agent/_common_agent.py", line 330, in treat_devices_removed
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     self.sg_agent.remove_devices_filter(devices)
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/securitygroups_rpc.py", line 226, in remove_devices_filter
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     self.firewall.remove_port_filter(device)
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_firewall.py", line 214, in remove_port_filter
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     self._remove_conntrack_entries_from_port_deleted(port)
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_firewall.py", line 185, in _remove_conntrack_entries_from_port_deleted
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     [device_info], ethertype, set())
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_conntrack.py", line 94, in delete_conntrack_state_by_remote_ips
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     self._delete_conntrack_state(device_info_list, rule)
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_conntrack.py", line 76, in _delete_conntrack_state
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     extra_ok_codes=[1])
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 120, in execute
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     execute_rootwrap_daemon(cmd, process_input, addl_env))
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 107, in execute_rootwrap_daemon
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     return client.execute(cmd, process_input)
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib/python2.7/site-packages/oslo_rootwrap/client.py", line 128, in execute
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     res = proxy.run_one_command(cmd, stdin)
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "<string>", line 2, in run_one_command
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent   File "/usr/lib64/python2.7/multiprocessing/managers.py", line 773, in _callmethod
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent     raise convert_to_error(kind, result)
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent RemoteError: 
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent ---------------------------------------------------------------------------
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent Unserializable message: ('#ERROR', ValueError('I/O operation on closed file',))
  2017-03-04 17:25:19.928 25876 ERROR neutron.plugins.ml2.drivers.agent._common_agent ---------------------------------------------------------------------------



  
  [root@node1 ~]# egrep -v "^#|^$" /etc/neutron/plugins/ml2/linuxbridge_agent.ini 
  [DEFAULT]
  [agent]
  [linux_bridge]
  physical_interface_mappings =provider:team1
  [securitygroup]
  enable_security_group = True
  firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
  [vxlan]
  enable_vxlan = False

  
  [root@node1 ~]# egrep -v "^#|^$" /etc/neutron/neutron.conf 
  [DEFAULT]
  auth_strategy = keystone
  [agent]
  [cors]
  [cors.subdomain]
  [database]
  [keystone_authtoken]
  auth_uri = http://172.16.21.100:5000
  auth_url = http://172.16.21.100:35357
  memcached_servers = 172.16.21.4:11211,172.16.21.5:11211
  auth_type = password
  project_domain_name = Default
  user_domain_name = Default
  project_name = service
  username = neutron
  password = 123456
  [matchmaker_redis]
  [nova]
  [oslo_concurrency]
  lock_path = /var/lib/neutron/tmp
  [oslo_messaging_amqp]
  [oslo_messaging_notifications]
  [oslo_messaging_rabbit]
  rabbit_hosts=172.16.21.4:5673, 172.16.21.5:5673
  rabbit_userid=openstack
  rabbit_password=RABBIT_PASS
  rabbit_ha_queues = true
  [oslo_messaging_zmq]
  [oslo_middleware]
  [oslo_policy]
  [qos]
  [quotas]
  [ssl]

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Follow ups