The agent doesn't delete unused bridges. If you want to clean up,
there's a tool for that, it's neutron/cmd/linuxbridge_cleanup.py :)
** Changed in: neutron
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1521314
Title:
Changing physical interface mapping may result in multiple physical
interfaces in bridge
Status in neutron:
Invalid
Bug description:
Version: 2015.2 (Liberty)
Plugin: ML2 w/ LinuxBridge
While testing various NICs, I found that changing the physical
interface mapping in the ML2 configuration file and restarting the
agent resulted in the old physical interface remaining in the bridge.
This can be observed with the following steps:
Original configuration:
[linux_bridge]
physical_interface_mappings = physnet1:eth2
racker@compute01:~$ brctl show
bridge name bridge id STP enabled interfaces
brqad516357-47 8000.e41d2d5b6213 no eth2
tap72e7d2be-24
Modify the bridge mapping:
[linux_bridge]
#physical_interface_mappings = physnet1:eth2
physical_interface_mappings = physnet1:eth1
Restart the agent:
racker@compute01:~$ sudo service neutron-plugin-linuxbridge-agent restart
neutron-plugin-linuxbridge-agent stop/waiting
neutron-plugin-linuxbridge-agent start/running, process 12803
Check the bridge:
racker@compute01:~$ brctl show
bridge name bridge id STP enabled interfaces
brqad516357-47 8000.6805ca37dc39 no eth1
eth2
tap72e7d2be-24
This behavior was observed with flat or vlan networks, and can result
in some wonky behavior. Removing the original interface from the
bridge(s) by hand or restarting the node is a workaround, but I
suspect LinuxBridge users aren't used to modifying the bridges
manually as the agent usually handles that.
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