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[Mark McClain <1206925@xxxxxxxxxxxxxxxxxx>]

This is likely related to the L3 message ordering bug present in
Grizzly.  This was addressed in the Havana release.  If this shows up,
we can reopen this bug.

** Changed in: neutron
       Status: New => Won't Fix

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Title:
  Creation of the qr interface fails sometimes

Status in OpenStack Neutron (virtual network service):
  Won't Fix

Bug description:
  Version: Grizzly 2013.1.1

  I have a 3 nodes Grizzly setup with one Controller, Network and
  Compute(KVM) node. I am using VLAN mode. My use case require me to
  create network, create instances, terminate instances and terminate
  networks. So I do a lot of network creation and deletion.

  It works fine most of the time. But occasionally when an instance is
  launched, the instance is unable to reach the external network. When
  this happens I see that the 'qr-xxxxx' interface is not created as
  shown below:

  root@openstack-dev-network# ip netns exec qrouter-81c474cb-acad-42b4-bc78-875992fa33f6 route -n
  Kernel IP routing table
  Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
  0.0.0.0         10.5.60.1       0.0.0.0         UG    0      0        0 qg-81e2a77d-71
  1.1.1.0         0.0.0.0         255.255.252.0   U     0      0        0 qg-81e2a77d-71
  root@openstack-dev-network #

  I see the following error in /var/log/quantum/openvswitch-agent.log

  Stderr: 'ovs-vsctl: no row "qr-fb582b82-f7" in table Interface\n'
  2013-07-29 06:14:18    ERROR [quantum.agent.linux.ovs_lib] Unable to execute ['ovs-vsctl', '--timeout=2', 'get', 'Interface', 'qr-a4f24e08-aa', 'external_ids']. Exception:
  Command: ['sudo', '/usr/bin/quantum-rootwrap', '/etc/quantum/rootwrap.conf', 'ovs-vsctl', '--timeout=2', 'get', 'Interface', 'qr-a4f24e08-aa', 'external_ids']
  Exit code: 1
  Stdout: ''
  Stderr: 'ovs-vsctl: no row "qr-a4f24e08-aa" in table Interface\n'

  
  And on restarting the quantum services, the interface gets created and the instance is able to reach the external network.

  root@openstack-dev-network:~# cd /etc/init.d/; for i in $( ls quantum-* ); do sudo service $i restart; done
  quantum-dhcp-agent stop/waiting
  quantum-dhcp-agent start/running, process 20872
  quantum-l3-agent stop/waiting
  quantum-l3-agent start/running, process 20885
  quantum-metadata-agent stop/waiting
  quantum-metadata-agent start/running, process 20894
  quantum-plugin-openvswitch-agent stop/waiting
  quantum-plugin-openvswitch-agent start/running, process 20903
  root@openstack-dev-network:/etc/init.d#

  
  root@openstack-dev-network# ip netns exec qrouter-81c474cb-acad-42b4-bc78-875992fa33f6 route -n
  Kernel IP routing table
  Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
  0.0.0.0         10.5.60.1       0.0.0.0         UG    0      0        0 qg-81e2a77d-71
  1.1.1.0         0.0.0.0         255.255.252.0   U     0      0        0 qg-81e2a77d-71
  192.168.3.0     0.0.0.0         255.255.255.0   U     0      0        0 qr-a4f24e08-aa
  root@openstack-dev-network #

  
  I do have the root_helper in /etc/quantum/plugins/openvswitch/ovs_quantum_plugin.ini.

  Regards,
  Balu

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