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Taikun OCP Guide

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neutron-linuxbridge-cleanup utility


Automated removal of empty bridges has been disabled to fix a race
condition between the Compute (nova) and Networking (neutron) services.
Previously, it was possible for a bridge to be deleted during the time
when the only instance using it was rebooted.


Use this script to remove empty bridges on compute nodes by running
the following command:

$ neutron-linuxbridge-cleanup


Do not use this tool when creating or migrating an instance as it
throws an error when the bridge does not exist.


Using this script can still trigger the original race condition. Only
run this script if you have evacuated all instances off a compute node
and you want to clean up the bridges. In addition to evacuating all
instances, you should fence off the compute node where you are going to
run this script so new instances do not get scheduled on it.