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Alvise,

You should probably use the openstack-operators mailing list. However, you
already solved the first part of your problem, which was that the
openvswitch servers weren't running. The problem you have now is that sudo
isn't paying attention to the quantum sudoers file which you should be able
to find in /etc/sudoers.d/quantum. You need to have a line in /etc/sudoers
that looks like this:

#includedir /etc/sudoers.d

If you don't, use visudo and add it. Alternatively you can just dump the
contents of /etc/sudoers.d/quantum into /etc/sudoers. That should take care
of things also.

For convenience I'll dump out the contents of my quantum sudoers file:

Defaults:quantum !requiretty

quantum ALL = (root) NOPASSWD: SETENV: /usr/bin/quantum-rootwrap


-Mike Wilson


On Wed, May 22, 2013 at 8:37 AM, Alvise Dorigo <alvise.dorigo at pd.infn.it>wrote:

> Hi,
> sorry if this is not the right place to post this; if it is not, please
> tell me in which forum I can post.
>
> I'm experiencing an error while installing the open vSwitch plugin agent
> on the compute node (a host running only the nova-compute service).
>
> I'm following the official guide:
>
>
> http://docs.openstack.org/trunk/openstack-network/admin/content/install_fedora.html
>
> I haven't got any problem during the quantum-server installation and
> configuration on the cloud controller, and there the quantum-server daemon
> runs correctly as I verified in its logfile.
>
> When trying to create the br-int with the command reported here:
> http://docs.openstack.org/trunk/openstack-network/admin/content/fedora_q_agent.html(ovs-vsctl add-br br-int) I get this error message:
>
> 2013-05-22T14:19:06Z|00002|reconnect|WARN|unix:/var/run/openvswitch/db.sock:
> connection attempt failed (No such file or directory)
> ovs-vsctl: unix:/var/run/openvswitch/db.sock: database connection failed
> (No such file or directory)
>
> it seems something related to the missing openvswitch services running.
> Then I tried to start them:
>
> service quantum-openvswitch-agent start
>
> but the result is even worst:
>
> Stderr: 'sudo: no tty present and no askpass program specified\n'
> 2013-05-22 16:19:02    ERROR [quantum.agent.linux.ovs_lib] Unable to
> execute ['ovs-ofctl', 'del-flows', 'br-int']. Exception:
> Command: ['sudo', 'ovs-ofctl', 'del-flows', 'br-int']
> Exit code: 1
> Stdout: ''
> Stderr: 'sudo: no tty present and no askpass program specified\n'
> 2013-05-22 16:19:02    ERROR [quantum.agent.linux.ovs_lib] Unable to
> execute ['ovs-ofctl', 'add-flow', 'br-int',
> 'hard_timeout=0,idle_timeout=0,priority=1,actions=normal']. Exception:
> Command: ['sudo', 'ovs-ofctl', 'add-flow', 'br-int',
> 'hard_timeout=0,idle_timeout=0,priority=1,actions=normal']
> Exit code: 1
> Stdout: ''
> Stderr: 'sudo: no tty present and no askpass program specified\n'
> 2013-05-22 16:19:02 CRITICAL [quantum] [Errno 19] No such device
>
> Of course I verified that the commands sudo and ovs-ofctl are there.
>
> Any idea ?
>
> thanks,
>
>  Alvise
>
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>
>
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