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[Packstack] [Neutron][Liberty] crash openvswitch due to segment ID set to None


I've wanted to test Liberty and used Packstack to deploy: 1x Controller, 1xNetwork Node, 2x Compute node

I use Neutron and ML2 plugin for my environment. Everything is setup properly and neutron agent-list / neutron agent-show <id> show my expected configuration and everything is up and running. On my network/compute nodes, my openvswitch agent is active (Running)

The issue happen has soon as i try to setup some networks:

  • Creation of a router: no issue

    neutron router-create admin_router

  • create a network/subnet: no issue

    neutron net-create public -- --router:external=True --provider:network_type local neutron subnet-create --allocation-pool start=,end= --gateway= --name public_subnet public

however if i restart my neutron-openvswitch-agent, it will die

    [root@NetworkNode ml2]# service neutron-openvswitch-agent status
Redirecting to /bin/systemctl status  neutron-openvswitch-agent.service
neutron-openvswitch-agent.service - OpenStack Neutron Open vSwitch Agent
   Loaded: loaded (/usr/lib/systemd/system/neutron-openvswitch-agent.service; enabled)
   Active: failed (Result: exit-code) since Fri 2015-11-27 12:14:51 EST; 679ms ago
  Process: 24386 ExecStart=/usr/bin/neutron-openvswitch-agent --config-file /usr/share/neutron/neutron-dist.conf --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugin.ini --config-dir /etc/neutron/conf.d/common --config-dir /etc/neutron/conf.d/neutron-openvswitch-agent --log-file /var/log/neutron/openvswitch-agent.log (code=exited, status=1/FAILURE)
 Main PID: 24386 (code=exited, status=1/FAILURE)

this is what i get in my log file:

[root@NetworkNode ml2]# tail -2 /var/log/neutron/openvswitch-agent.log
2015-11-27 12:14:51.136 24386 ERROR neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-def72090-0c7d-4142-aad6-d40ecd086107 - - - - -] invalid literal for int() with base 10: 'None' Agent terminated!
2015-11-27 12:14:51.142 24386 INFO oslo_rootwrap.client [req-def72090-0c7d-4142-aad6-d40ecd086107 - - - - -] Stopping rootwrap daemon process with pid=24415
[root@NetworkNode ml2]#

if i delete my network, then the ovs agent will start again

i did some research on this

invalid literal for int() with base 10: 'None' Agent terminated!

and i found this known bug:

The segmentation_id of a OVS VLAN can be None, but a recent change
assumed that it was always an integer. It highlighted the fact that we
try to store None in the OVS database, which got stored as a string.
This fixes the storage, and handles loading the value while keeping

I'm using flat vlan and i believe this is the issue i face...

Where i'm not comfortable is :

  • Is the liberty version retrieve through RDO contain the patch ? Is there anyway to know this ?
  • If not, any idea when it may be ? Any idea as a workaround ??

Not being able to use Flat vlan is slightly disruptive ^^'

Thanks for your feedback/help