Ben Stienstra

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libvirt_add_network

Add NIC live to libvirt guest

  • List active network interface for vm:
    [root@srv2 ~]# virsh domiflist vmkdc
    Interface  Type       Source     Model       MAC
    -------------------------------------------------------
    vnet7      bridge     br400      virtio      52:54:00:c9:04:15
  • Generate new unique MAC-address:
    [root@srv2 ~]# cat macgen.py 
    #!/usr/bin/python
    # macgen.py script to generate a MAC address for guests on Xen
    #
    import random
    #
    def randomMAC():
            mac = [ 0x00, 0x16, 0x3e,
                    random.randint(0x00, 0x7f),
                    random.randint(0x00, 0xff),
                    random.randint(0x00, 0xff) ]
            return ':'.join(map(lambda x: "%02x" % x, mac))
    #
    print randomMAC()
  • Add new NIC to guest. Use random generated MAC address:
    [root@srv2 ~]# virsh attach-interface --domain vmkdc --type bridge --source br300 --model virtio --mac 00:16:3e:23:3c:36 --config --live
    Interface attached successfully
  • List network interfaces for VM:
    [root@srv2 ~]# virsh domiflist vmkdc                           
    Interface  Type       Source     Model       MAC
    -------------------------------------------------------
    vnet7      bridge     br400      virtio      52:54:00:c9:04:15
    vnet8      bridge     br300      virtio      00:16:3e:23:3c:36
libvirt_add_network.txt · Last modified: 2016/04/01 13:51 by admin