Linuxbridge agent failed to start when bridge_mappings is given

[Slawek Kaplonski]

When I was working on fullstack tests for Linuxbridge agent I found that when bridge_mappings is configured in LinuxBridge agent config file then for calculating agent_id mac address of first bridge name from this bridge_mappings is searched and it is failing. Due to that agent is not starting properly and is hanging.

Agent's log is stuck on:

ig/cfg.py:2405
2016-02-06 23:48:53.003 6023 DEBUG oslo_service.service [-] ******************************************************************************** log_opt_values /home/ubuntu/neutron/.tox/dsvm-fullstack/local/lib/python2.7/site-packages/oslo_con
fig/cfg.py:2407
2016-02-06 23:48:53.004 6023 DEBUG neutron.agent.securitygroups_rpc [req-43811efb-7a62-4059-8c93-b75b8554e7f8 - - - - -] Init firewall settings (driver=None) init_firewall /home/ubuntu/neutron/neutron/agent/securitygroups_rpc.py:98
2016-02-06 23:48:53.005 6023 WARNING neutron.agent.securitygroups_rpc [req-43811efb-7a62-4059-8c93-b75b8554e7f8 - - - - -] Driver configuration doesn't match with enable_security_group

and then agent was not sending report about his state to neutron server.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/277611

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/277611
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=034d5a2f374ec34fba31c2c322d2291a2fb00942
Submitter: Jenkins
Branch: master

commit 034d5a2f374ec34fba31c2c322d2291a2fb00942
Author: Slawek Kaplonski <email address hidden>
Date: Tue Feb 9 00:35:05 2016 +0100

    Fix getting agent id in linuxbridge agent

    If bridge_mappings is configured in linuxbridge agent, it will now
    determine agent_id which is based on MAC address of first device
    from bridge_mappings in correct way.

    Change-Id: I940379b2fd3b5f8c96cdf3b7a3c0da78532491f6
    Closes-bug: #1542923