On Fri, Mar 05, 2010 at 01:05:51PM +0530, Kumar L Srikanth-B22348 wrote:
Hi, I want to assign a static IP 172.16.1.20 to one of the containers created using libvirt. For that, I defined a network 'mynetwork' using net-define. The XML format for that network is shown below:
The 'net-XXXX' commands are for getting up NAT/routed networking on the host. The guest is then connected to this network & gets given an IP from the range assigned.
<network> <name>mynetwork</name> <uuid>f76c44dd-bcef-6b45-4a50-00d575a369ad</uuid> <bridge name='virbr1' stp='on' delay='0' /> <ip address='172.16.1.20' netmask='255.255.255.0'> </ip> </network>
This has configured your *host* to have 172.16.1.20, not the container.
I started the network 'mynetwork' using net-start.
virsh # net-list --all Name State Autostart ----------------------------------------- default active yes mynetwork active no
I created a domain 'vm1_fedora' with libvirt XML: <domain type='lxc' id='1'> <name>vm1_fedora</name> <memory>500000</memory> <os> <type>exe</type> <init>/bin/bash</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount'> <source dir='/root/lxc/fedora12'/> <target dir='/'/> </filesystem> <filesystem type='mount'> <source dir='/root/lxc/fedora12/dev'/> <target dir='/dev'/> </filesystem> <interface type='network'> <source network='mynetwork'/> </interface> <console type='pty' /> </devices> </domain>
But, when I start that domain and see for 'ifconfig', I am not able to see the IP address 172.16.1.20 there.
The libvirt configuration only determines *how* a guest / container is connected to the host. In this case you've conencted it to the virtual network 'mynetwork'. It does not do anything to actually configure the network inside the container - that still needs to be done using the regular distro initscripts or manual ifconfig inside the container.
[root@localhost /]# ifconfig eth0 Link encap:Ethernet HWaddr 52:54:00:53:4D:BF inet6 addr: fe80::5054:ff:fe53:4dbf/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:18 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:840 (840.0 b) TX bytes:384 (384.0 b)
Inside your container you need to setup the config for eth0 still - it does not happen automatically Regards, Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://deltacloud.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|