libvirt users - Feb 2014 - Re: POOL of SRIOV networks with multiple PFs

We are using an Intel 82599 chip that allows 4 PFs ( eth0..3) per VM. I am able
to manually start VMs using the hostdev
definition for the four network connections, but I'd like to start using the
pool approach. Ubuntu 12.04 libvirt 1.0.0

Following:
http://wiki.libvirt.org/page/Networking#Assignment_from_a_pool_of_SRIOV_VFs_in_a_libvirt_.3Cnetwork.3E_definition
I can get a pool working with one network-
 <network>
   <name>passthrough_eth0</name>
   <forward mode='hostdev' managed='yes'>
     <pf dev='eth0'/>
   </forward>
 </network>
and I can get the four networks started using similar xml. Using one stanza of
network type passthrough, I can get a
pool on one PF.

But when I try to create the VM using four stanzas of network definition,
   <interface type='network'>
      <source network='passthrough_eth0'/>
    </interface>
    <interface type='network'>
      <source network='passthrough_eth1'/>
    </interface>
    <interface type='network'>
      <source network='passthrough_eth2'/>
    </interface>
    <interface type='network'>
      <source network='passthrough_eth3'/>
    </interface>

I get this error:
"error: Failed to create domain from ./vm0.xml
error: internal error Process exited while reading console log output: kvm:
-device
pci-assign,host=01:10.1,id=hostdev0,configfd=47,bus=pci.0,addr=0x8: Duplicate ID
'hostdev0' for device "

Ideas?



-- 
John Fisher

On Wed, Feb 26, 2014 at 11:22 AM, john fisher <john@jpfisher.net> wrote:
>  I get this error:
> "error: Failed to create domain from ./vm0.xml
> error: internal error Process exited while reading console log output:
> kvm: -device
> pci-assign,host=01:10.1,id=hostdev0,configfd=47,bus=pci.0,addr=0x8:
> Duplicate ID 'hostdev0' for device "
>
> Ideas?
>
Yes.

https://bugzilla.redhat.com/show_bug.cgi?id=1001881

Dax Kelson

On 02/26/2014 08:43 PM, Dax Kelson wrote:
> On Wed, Feb 26, 2014 at 11:22 AM, john fisher <john@jpfisher.net
> <mailto:john@jpfisher.net>> wrote:
>
>     I get this error:
>     "error: Failed to create domain from ./vm0.xml
>     error: internal error Process exited while reading console log
>     output: kvm: -device
>     pci-assign,host=01:10.1,id=hostdev0,configfd=47,bus=pci.0,addr=0x8:
Duplicate
>     ID 'hostdev0' for device "
>
>     Ideas?
>
>
> Yes.
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1001881
>
And since it doesn't specifically spell it out in the bug report - the
upstream fix was included in libvirt-1.0.6. I don't know if it was
backported to any -maint branches, but there should be enough
information in the bug report to figure that out with a bit of git
sleuthing...