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Missing qvb and qvo Veth pairs on compute node

asked 2015-07-08 09:55:52 -0500

bobyakov gravatar image

Hi Guys,

Ran into an issue where compute node froze and I had to force reboot it. After it came up, Couldn't get the instance to start. I discovered on the compute node that I have the qbr Bridge and Tap interface, but the veth pairs are missing. Can I manually add them back in and how if i can?

cwtcpt042:~$ brctl show:

bridge name     bridge id               STP enabled     interfaces
qbrf547ed17-e7          8000.fe163e7314ec       no              tapf547ed17-e7
qbrfec36fc5-4c          8000.fe163e8ff337       no              tapfec36fc5-4c
virbr0          8000.000000000000       yes

cwtcpt042:~$ sudo ovs-vsctl show:

 Bridge br-int
        fail_mode: secure
        Port br-int
            Interface br-int
                type: internal
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
    ovs_version: "2.0.2"
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answered 2015-07-08 10:00:21 -0500

SamYaple gravatar image

Restarting the neutron plugin agent on the compute node should recreate everything you need, unless there are other issues with OVS.

ovs_version: "2.0.2" Is a known bad version. You really shouldn't be using anything less than 2.1, preferably 2.3.1.

The kilo cloud-archive has packages for ovs 2.3.1, I suggest adding that repo and pinning the OVS packages to get that later version.

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Comments

I tried restarting openvswitch-switch and neutron-plugin-openvswitch-agent, still missing qvo and qvb.. Is there another service that needs to be restarted?

Also, I'm using Ice house, should I be concerned about updating OVS only?

bobyakov gravatar imagebobyakov ( 2015-07-08 10:18:53 -0500 )edit

Updating OVS is safe and recommended. I have seen many issues with 2.0.2. I would recommend the latest OVS before pursuing these issues further to rule that out.

SamYaple gravatar imageSamYaple ( 2015-07-09 02:03:46 -0500 )edit

Should I use OpenVswitch, Ubuntu or Openstack repository?

bobyakov gravatar imagebobyakov ( 2015-07-09 08:12:33 -0500 )edit

Can you clarify something please, if I add https://launchpad.net/~ubuntu-cloud-a... repository, when I do updates on Ice house won't it install the latest services for all not just OVS? How can I limit this update to OVS only?

bobyakov gravatar imagebobyakov ( 2015-07-09 12:06:49 -0500 )edit

Had to restart services and then instance seems to have worked. I tried to add tap manually, shouldn't have.

bobyakov gravatar imagebobyakov ( 2015-07-09 13:54:26 -0500 )edit
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answered 2016-12-29 16:54:20 -0500

I had a tap and a qbr port but no qvb or qbo. Restarting neutron services did not change anything. Restarting nova services on the compute node added those ports back.

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Asked: 2015-07-08 09:55:52 -0500

Seen: 934 times

Last updated: Jul 08 '15