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holms
Asked: 2013-08-29 05:27:32 +0800 CST

libvirt network error - no 'default' network device found

  • 772

My original purpose is to create centos image for openstack. Although I did directly with kvm, still wondering about error.

Was using this manual for my task.

After this command:

# virt-install --virt-type kvm --name centos-6.4 --ram 1024 \
--cdrom=/data/isos/CentOS-6.4-x86_64-netinstall.iso \
--disk /tmp/centos-6.4.qcow2,format=qcow2 \
--network network=default \
--graphics vnc,listen=0.0.0.0 --noautoconsole \
--os-type=linux --os-variant=rhel6

I got an error:

ERROR    Error in network device parameters: Virtual network 'default' does not exist: Network not found: no network with matching name 'default'

Needless to say that I'm using RDO. By default I don't have any pre-configured network devices for libvirt. Question is which networking devices are available? Or if there's none, how to create one? Maybe RDO has different approach on libvirt networking?

centos

6 Answers

  1. list files in 

    /etc/libvirt/qemu/networks/

    and 

    /etc/libvirt/qemu/networks/autostart/

    if empty - create it

    useful commands:

    virsh net-start default

    or

    virsh net-autostart default

    and

    virsh net-destroy default
virsh net-undefine default
service libvirtd restart

    for detailed explanation read wiki: http://wiki.libvirt.org/page/Networking

    • 15

  2. This is actually expected behaviour it seems .. something to do with how NAT forwarding is set-up by default. The system expects a 'default' network, bound to virbr0. So, if you delete that network, virt-install would no longer run as expected.

    You probably can work around this if you are willing to poke around the innards of libvirt config files, and modify all relevant configuration file defaults. The error message can also be made more useful and explanatory ..

    To recreate the network, first move off the network currently assigned to virbr0, and then:

    # virsh net-define /usr/share/libvirt/networks/default.xml
Network default defined from /usr/share/libvirt/networks/default.xml
# virsh net-autostart default
Network default marked as autostarted
# virsh net-start default
Network default started`

    Of course, you can also recreate the 'default' network via the virt-manager or other GUI ..

    See more details here

    • 9
  3. Best Answer

    List available networks and specify the one you need:

    virsh net-list

    You can use virt-manager GUI too.

    • 7

  4. You can start the default network by doing:

    virsh net-start default
    • 1

  5. Simply requires, as above: 

    yum install libvirt-daemon-config-network

    This will populate the files required... then execute the command:

    virsh net-list

    ...then if the network isn't active

    virsh net-start default
    • 1

  6. You may be missing the libvirt-daemon-config-network RPM. It doesn’t seem to be a dependency of the main packages you need to install to get KVM running.

    Try installing it and trying again.

    • 0