CIRCLE / cloud

When VM hasn't got boot media, don't able to detach network interface.

On first destroy doesn't produce any errors.

On second attach libvirt duplicates the network interface confing.

On second destroy gives following error: Unhandled exception: Exception: operation failed: multiple devices matching mac address 02:00:00:0b:30:02 found

cloud@devenv:~ $ sudo virsh domiflist cloud-179
Interface  Type       Source     Model       MAC
-------------------------------------------------------
cloud-179-2 bridge     cloud      virtio      02:00:00:0b:30:02
cloud-179-2 bridge     cloud      virtio      02:00:00:0b:30:02

cloud@devenv:~ $ sudo virsh dumpxml cloud-179
<domain type='qemu' id='9'>
  <name>cloud-179</name>
  <uuid>e9da7eac-2bd0-45a4-bc25-ee6e1200ca84</uuid>
  <memory unit='KiB'>131072</memory>
  <currentMemory unit='KiB'>131072</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <cputune>
    <shares>30</shares>
  </cputune>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='i686' machine='pc-i440fx-trusty'>hvm</type>
    <boot dev='hd'/>
    <bootmenu enable='no'/>
  </os>
  <features>
    <acpi/>
  </features>
  <cpu>
    <topology sockets='1' cores='2' threads='1'/>
  </cpu>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/kvm</emulator>
    <controller type='usb' index='0'>
      <alias name='usb0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'>
      <alias name='pci.0'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <alias name='virtio-serial0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </controller>
    <interface type='bridge'>
      <mac address='02:00:00:0b:30:02'/>
      <source bridge='cloud'/>
      <vlan>
        <tag id='2'/>
      </vlan>
      <virtualport type='openvswitch'>
        <parameters interfaceid='3d6ac8fb-6cf3-4d6f-ae1e-8f21a921faca'/>
      </virtualport>
      <target dev='cloud-179-2'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </interface>
    <interface type='bridge'>
      <mac address='02:00:00:0b:30:02'/>
      <source bridge='cloud'/>
      <vlan>
        <tag id='2'/>
      </vlan>
      <virtualport type='openvswitch'>
        <parameters interfaceid='743b16f9-766d-4209-9232-1fa8660bdf78'/>
      </virtualport>
      <target dev='cloud-179-2'/>
      <model type='virtio'/>
      <alias name='net1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </interface>
    <serial type='unix'>
      <source mode='bind' path='/var/lib/libvirt/serial/cloud-179'/>
      <target port='0'/>
      <alias name='serial0'/>
    </serial>
    <console type='unix'>
      <source mode='bind' path='/var/lib/libvirt/serial/cloud-179'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <channel type='unix'>
      <source mode='bind' path='/var/lib/libvirt/serial/vio-cloud-179'/>
      <target type='virtio' name='agent'/>
      <alias name='channel0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <input type='tablet' bus='usb'>
      <alias name='input0'/>
    </input>
    <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
    <graphics type='vnc' port='20002' autoport='no' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='apparmor' relabel='yes'>
    <label>libvirt-e9da7eac-2bd0-45a4-bc25-ee6e1200ca84</label>
    <imagelabel>libvirt-e9da7eac-2bd0-45a4-bc25-ee6e1200ca84</imagelabel>
  </seclabel>
</domain>