[one-users] NIC Hot Plug with OpenVSwitch

[Jaime Melis]

Hi,

you are right, this is a bug. I have created a new bug report:
http://dev.opennebula.org/issues/2172

thanks for the feedback,
Jaime


On Mon, Jul 15, 2013 at 5:17 AM, MENDOZA, John Robert T. <
bert at asti.dost.gov.ph> wrote:

>  Hi Jon,
>
> Thanks for the feedback.  I don't believe its an issue with libvirtd
> versions, but with the utilities managing libvirt.  Opennebula can already
> use the openvswitch bridges when defined in a VM xml configuration file.
>
> Upon inspection of the attach_nic script, we can see there that it's using
> "virsh attach-inteface" while attach_disk uses "virsh attach-device" and
> uses an xml config file as input. The virsh utility does not support
> openvswitch bridges when specified in the command line yet.
>
> I'm seeing how we can device a workaround for this. Either we re-program
> the attach_nic script to use "attach-device" or encapsulate the ovs bridge
> as a libvirt network definition as suggested in the libvirt-users list.
>
> https://www.redhat.com/archives/libvirt-users/2013-May/msg00034.html
>
>
> Thanks,
> Bert
>
>
>
>
>
> On Sunday, 14 July, 2013 04:32 PM, Jon wrote:
>
> Hello John,
>
>  I also get an error, see below.
> I'm on ubuntu 13.04 using libvirt 1.0.2 and ovs versions :
>
>  ovs-vswitchd (Open vSwitch) 1.9.0
> Compiled Mar  1 2013 14:34:38
> OpenFlow versions 0x1:0x1
>
>  This is the relevant entry in my VM log:
>
>  Sun Jul 14 02:19:17 2013 [VMM][I]: Successfully execute network driver
> operation: pre.
> Sun Jul 14 02:19:17 2013 [VMM][I]: Command execution fail:
> /var/tmp/one/vmm/kvm/attach_nic one-24 02:00:0a:2a:00:65 ovsbr0 - 24
> 192.168.0.35
> Sun Jul 14 02:19:17 2013 [VMM][E]: attach_nic: Command "virsh --connect
> qemu:///system attach-interface --domain one-24 --type bridge --source
> ovsbr0 --mac 02:00:0a:2a:00:65" failed: error: Failed to attach interface
> Sun Jul 14 02:19:17 2013 [VMM][I]: error: Unable to add bridge ovsbr0 port
> vnet1: Operation not supported
> Sun Jul 14 02:19:17 2013 [VMM][E]: Could not attach NIC
> (02:00:0a:2a:00:65) to one-24
> Sun Jul 14 02:19:17 2013 [VMM][I]: ExitCode: 1
> Sun Jul 14 02:19:17 2013 [VMM][I]: Failed to execute virtualization driver
> operation: attach_nic.
> Sun Jul 14 02:19:17 2013 [VMM][E]: Error attaching new VM NIC: Could not
> attach NIC (02:00:0a:2a:00:65) to one-24
>
>  The oned log basically echos the same.
>
>  I have not tried to manually run the command though.
>
>  I also migrated the vm to a different host just in case it was an ovs
> misconfig on the first host, but received the same error.
>
>  Wondering if it's maybe just the version of libvirt we're using.
>
>  This is really the first I've tested NIC hotplugging so please take my
> results with a grain of salt.
>
>  Best Regards,
> Jon A
>
>
>
> On Sun, Jul 14, 2013 at 1:10 AM, MENDOZA, John Robert T. <
> bert at asti.dost.gov.ph> wrote:
>
>> Hi Everyone,
>>
>> Hope everyone is doing ok. :)
>>
>> Just want to ask if anybody has tried the NIC hot plug functionality
>> with OpenVSwitch.  I'm testing ONE 4.0.1 and am having error messages
>> pertaining to the creation of the virtual ports for the VMs.  It
>> outputs  "error: Unable to add bridge ovsbr0 port vnetX: Operation not
>> supported". I did some Google'ing and it seems that the virsh CLI
>> utility has not been updated to support OpenVSwitch bridges as it still
>> treats the type bridge argument to be a linux bridge.  I'm thinking of
>> recoding the "attach_nic" script to create an xml file and use "virsh
>> attach-device" to hot plug the NIC the same way disk hot plugging is
>> done.  Any thoughts? Or is there something else I should know why ONE
>> used "attach-interface" in the first place?
>>
>> Thanks,
>> John Robert Mendoza
>> _______________________________________________
>> Users mailing list
>> Users at lists.opennebula.org
>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>
>
>
>
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>
>


-- 
Join us at OpenNebulaConf2013 <http://opennebulaconf.com/> in Berlin, 24-26
September, 2013
--
Jaime Melis
Project Engineer
OpenNebula - The Open Source Toolkit for Cloud Computing
www.OpenNebula.org | jmelis at opennebula.org
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