kvm networking (NAT) on debian unstable with libvirt

kvm networking (NAT) on debian unstable with libvirt

[Thomas Koch]

Already sent to libvirt without response.

Hi,

I'm trying to get NAT networking running as described in 
http://libvirt.org/formatnetwork.html#examplesNAT

But in the guest, ifconfig shows only the lo interface. I created the kvm 
image (debian lenny 5.0.3) directly with qemu-img and kvm, because virt-
install also didn't work. Afterwards I created the XML file for libvirt:

<domain type='kvm'>
  <name>hadoop1</name>
  <uuid>c40b6644-362a-e5ab-8825-cd1a7fbe24eb</uuid>
  <memory>524288</memory>
  <currentMemory>524288</currentMemory>
  <vcpu>1</vcpu>
  <os>
    <type arch='x86_64' machine='pc'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/var/lib/libvirt/images/hadoop1.qcow2'/>
      <target dev='hda' bus='ide'/>
    </disk>
    <interface type='network'>
      <mac address='52:54:00:05:74:bb'/>
      <source network='default'/>
      <model type='virtio'/>
    </interface>
    <!--serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target port='0'/>
    </console-->
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='-1' autoport='yes' keymap='de-ch'/>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
    </video>
  </devices>
</domain>

The network config is:

<network>
  <name>default</name>
  <bridge name="virbr0" />
  <forward/>
  <ip address="192.168.122.1" netmask="255.255.255.0">
    <dhcp>
      <range start="192.168.122.2" end="192.168.122.254" />
    </dhcp>
  </ip>
</network>

ifconfig of the host (needs cleanup, I know):

eth1      Link encap:Ethernet  Hardware Adresse 00:1c:25:18:4d:e6  
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metrik:1       
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0       
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0     
          Kollisionen:0 Sendewarteschlangenlänge:1000              
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)                   
          Speicher:fe200000-fe220000                               

eth1:avahi Link encap:Ethernet  Hardware Adresse 00:1c:25:18:4d:e6  
          inet Adresse:169.254.6.97  Bcast:169.254.255.255  Maske:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metrik:1                 
          Speicher:fe200000-fe220000                                         

lo        Link encap:Lokale Schleife  
          inet Adresse:127.0.0.1  Maske:255.0.0.0
          inet6-Adresse: ::1/128 Gültigkeitsbereich:Maschine
          UP LOOPBACK RUNNING  MTU:16436  Metrik:1          
          RX packets:160751 errors:0 dropped:0 overruns:0 frame:0
          TX packets:160751 errors:0 dropped:0 overruns:0 carrier:0
          Kollisionen:0 Sendewarteschlangenlänge:0                 
          RX bytes:27262569 (25.9 MiB)  TX bytes:27262569 (25.9 MiB)

virbr0    Link encap:Ethernet  Hardware Adresse 4a:30:15:4d:b5:0d  
          inet Adresse:192.168.122.1  Bcast:192.168.122.255  
Maske:255.255.255.0
          inet6-Adresse: fe80::8804:ecff:febc:fa54/64 
Gültigkeitsbereich:Verbindung
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metrik:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:299 errors:0 dropped:0 overruns:0 carrier:0
          Kollisionen:0 Sendewarteschlangenlänge:0
          RX bytes:0 (0.0 B)  TX bytes:47842 (46.7 KiB)

vnet0     Link encap:Ethernet  Hardware Adresse 4a:30:15:4d:b5:0d
          inet6-Adresse: fe80::4830:15ff:fe4d:b50d/64 
Gültigkeitsbereich:Verbindung
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metrik:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:128 errors:0 dropped:0 overruns:0 carrier:0
          Kollisionen:0 Sendewarteschlangenlänge:500
          RX bytes:0 (0.0 B)  TX bytes:16426 (16.0 KiB)

wlan0     Link encap:Ethernet  Hardware Adresse 00:1d:e0:08:89:21
          inet Adresse:192.168.178.23  Bcast:192.168.178.255  
Maske:255.255.255.0
          inet6-Adresse: fe80::21d:e0ff:fe08:8921/64 
Gültigkeitsbereich:Verbindung
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metrik:1
          RX packets:10608 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10358 errors:0 dropped:0 overruns:0 carrier:0
          Kollisionen:0 Sendewarteschlangenlänge:1000
          RX bytes:7515487 (7.1 MiB)  TX bytes:1367200 (1.3 MiB)

wmaster0  Link encap:UNSPEC  Hardware Adresse 00-1D-
E0-08-89-21-00-00-00-00-00-00-00-00-00-00
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metrik:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          Kollisionen:0 Sendewarteschlangenlänge:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

The call to KVM from the libvirt log is (linebreaks by me):

LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
HOME=/root USER=root LOGNAME=root /usr/bin/kvm 
-S -M pc -m 512 -smp 1 -name hadoop1 
-uuid c40b6644-362a-e5ab-8825-cd1a7fbe24eb 
-monitor unix:/var/run/libvirt/qemu/hadoop1.monitor,server,nowait 
-boot c -drive file=/var/lib/libvirt/images/hadoop1.qcow2,
               if=ide,index=0,boot=on,format=qcow2 
-net nic,macaddr=52:54:00:05:74:bb,vlan=0,model=virtio,name=virtio.0 
-net tap,fd=16,vlan=0,name=tap.0 
-serial none -parallel none -usb -vnc 127.0.0.1:0 -k de-ch -vga cirrus

Thanks for any help,
Thomas Koch, http://www.koch.ro