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Re: [libvirt-users] Libvirt 1.0.5 with Openvswitch 1.11.90: unable to add bridge br0 port vnet0 operation not supported



On 05/07/2013 02:10 AM, Christopher Paggen (cpaggen) wrote:

Howdy,

 

Running the most recent OVS and libvirt I’m running into the following error message with virt-install:

 

root qemu-kvm:~/libvirt-1.0.5# ovs-vsctl -V

ovs-vsctl (Open vSwitch) 1.11.90

Compiled May  6 2013 22:37:22

root qemu-kvm:~/libvirt-1.0.5#

root qemu-kvm:~/libvirt-1.0.5# virt-install --connect qemu:///system --name DSL2 --ram 1024 --vcpus 1 --disk path=/tmp/dsl2,size=1,bus=virtio,cache=none --network=bridge:br0  --vnc --os-type=linux --cdrom /dev/sr0

 

Starting install...

ERROR    Unable to add bridge br0 port vnet0: Operation not supported

Domain installation does not appear to have been successful.

If it was, you can restart your domain by running:

  virsh --connect qemu:///system start DSL2

otherwise, please restart your installation.

root qemu-kvm:~/libvirt-1.0.5# ovs-vsctl del-port br0 vnet0

root qemu-kvm:~/libvirt-1.0.5# libvirtd --version

libvirtd (libvirt) 1.0.5

root qemu-kvm:~/libvirt-1.0.5# virsh --version

1.0.5

root qemu-kvm:~/libvirt-1.0.5# virt-install --connect qemu:///system --name DSL2 --ram 1024 --vcpus 1 --disk path=/tmp/dsl2,size=1,bus=virtio,cache=none --network=bridge:br0  --vnc --os-type=linux --cdrom /dev/sr0


There is nothing in this command line to say that the bridge is an openvswitch bridge, so libvirt is attempting to treat it as the default Linux host bridge type.

As a matter of fact, as far as I know virt-install hasn't been enhanced to support direct description of an openvswitch bridge on its commandline.


The best way to solve this problem is to create a libvirt network to encapsulate the openvswitch bridge, then tell virt-install to use that network.

1) Put the following xml into a file (e.g. /tmp/ovsnet.xml):


    <network>
      <name>ovs-br0</name>
      <forward mode='bridge'/>
      <bridge name='br0'/>
      <virtualport type='openvswitch'/>
    </network>

2) define and start the network:

    # virsh net-define /tmp/ovsnet.xml
    # virsh net-start ovs-br0
    # virsh net-autostart ovs-br0

3) run virt-install telling it to use the network "ovs-net":

    # virt-install --connect qemu:///system --name DSL2 --ram 1024 --vcpus 1 \
      --disk path=/tmp/dsl2,size=1,bus=virtio,cache=none \
      --network=ovs-br0 \    <======= THIS LINE IS CHANGED.
      --vnc --os-type=linux --cdrom /dev/sr0



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