[libvirt] OpenVZ : cannot assign bridge to any interface
Yuji NISHIDA
nishidy at nict.go.jp
Wed Jul 22 05:55:59 UTC 2009
Hi,
I'm bit confuing between 2 problems with libvirt-0.6.5 for OpenVZ.
[1] bridge was created but no interface assigned to it
[2] virsh dumpxml returns xml in which type is "qemu"
[1] -------------------------------------------------
I tried libvirt-0.6.5 on Fedora8 to create OpenVZ container ( OpenVZ
kernel is linux-2.6.18 ).
A bridge was seemed to successfully create but no interface could not
be assigned to the bridge.
Due to that, ping could not reach the guest in container(10.0.1.2).
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
[root at node13 test]# brctl show
bridge name bridge id STP enabled interfaces
br101 8000.000000000000 no
[root at node13 test]# ifconfig -a
br101 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:10.0.1.1 Bcast:10.0.1.15 Mask:255.255.255.240
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:30 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:5031 (4.9 KiB)
eth0 Link encap:Ethernet HWaddr 00:1C:C4:xx:xx:xx
inet addr:133.xx.xx.xx Bcast:133.xx.xx.xx Mask:255.255.255.0
inet6 addr: fe80::21c:c4ff:xxxx:xxxx/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:196949 errors:0 dropped:0 overruns:0 frame:0
TX packets:64300 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:228373526 (217.7 MiB) TX bytes:5652593 (5.3 MiB)
Interrupt:169
eth1 Link encap:Ethernet HWaddr 00:1C:C4:xx:xx:xx
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:50
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:323 errors:0 dropped:0 overruns:0 frame:0
TX packets:323 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:29949 (29.2 KiB) TX bytes:29949 (29.2 KiB)
sit0 Link encap:IPv6-in-IPv4
NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
venet0 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
veth101 Link encap:Ethernet HWaddr 52:54:00:52:C3:FF
inet6 addr: fe80::5054:ff:fe52:c3ff/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
The followings are python script and xml that I tested with.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
[root at node13 test]# cat test.py
import libvirt
conn = libvirt.open('openvz:///system')
conn.networkDefineXML( file('net.xml').read() )
conn.defineXML( file('test.xml').read() )
net = conn.networkLookupByName('guestnet101')
net.create()
guest = conn.lookupByName('101')
guest.create()
[root at node13 test]# cat test.xml
<domain type='openvz' id='101'>
<name>101</name>
<os>
<type>exe</type>
<init>/sbin/fakeinit.sh</init>
</os>
<memory>524288</memory>
<devices>
<filesystem type='template'>
<source name='fedora-10-x86_64'/>
<target dir='/'/>
</filesystem>
<console type='pty'/>
<interface type='bridge'>
<mac address="52:54:00:00:01:01" />
<source bridge='guestnet101'/>
<target dev='veth101'/>
</interface>
</devices>
</domain>
[root at node13 test]# cat net.xml
<network>
<name>guestnet101</name>
<bridge name="br101" stp="off" />
<forward mode="nat"/>
<ip address="10.0.1.1" netmask="255.255.255.240">
<dhcp>
<range start="10.0.1.2" end="10.0.1.2" />
</dhcp>
</ip>
</network>
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
[2] -------------------------------------------------
I guess "type" in domain must be 'openvz' but virsh dumpxml returns it
as 'qemu'.
( The configuration of VE 101 remains in [1] )
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
[root at node13 test]# virsh dumpxml 101
<domain type='qemu' id='101'>
<name>101</name>
<uuid>dedee02b-b74f-6e43-f5ec-27050986efa8</uuid>
<memory>0</memory>
<currentMemory>0</currentMemory>
<vcpu>1</vcpu>
<os>
<type>exe</type>
<init>/sbin/init</init>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>destroy</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<filesystem type='template'>
<source name='fedora-10-x86_64'/>
<target dir='/'/>
</filesystem>
<interface type='bridge'>
<mac address='52:54:00:00:01:01'/>
<source bridge='guestnet101'/>
<target dev='veth101'/>
</interface>
</devices>
</domain>
[root at node13 test]# virsh net-dumpxml guestnet101
<network>
<name>guestnet101</name>
<uuid>5462e7a5-2048-3067-af9d-b134381a3f8a</uuid>
<forward mode='nat'/>
<bridge name='br101' stp='off' forwardDelay='0' />
<ip address='10.0.1.1' netmask='255.255.255.240'>
<dhcp>
<range start='10.0.1.2' end='10.0.1.2' />
</dhcp>
</ip>
</network>
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
Regards.
-----
Yuji Nishida
nishidy at nict.go.jp
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