Re: [libvirt] Bringing up LXC container from virsh command prompt.

4 Mar 2010

      Hi Daniel,
I am able to get the 'ifconfig' details in any one of the following 2
cases:
1. If I execute '/sbin/ifconfig'
2. If I include '/sbin' in the PATH environment variable.

But, the result of ifconfig is showing all the IP's available in the
host machine (The same result when I execute ifconfig in the host).
When I execute the ifconfig in the Linux Container command
prompt(through the command lxc-start -n fedora12 /bin/bash), I am
getting the IP which I was assigned while creating the container. 
But, the same IP is not getting when I execute the ifconfig in the virsh
command prompt(through the command virsh -c lxc:/// console vm1_fedora).

Regards,
Srikanth.

-----Original Message-----
From: Daniel P. Berrange [mailto:berrange@redhat.com] 
Sent: Thursday, March 04, 2010 3:17 PM
To: Kumar L Srikanth-B22348
Cc: libvir-list@redhat.com; Reddy B Veera-B22347
Subject: Re: Bringing up LXC container from virsh command prompt.

On Thu, Mar 04, 2010 at 11:54:18AM +0530, Kumar L Srikanth-B22348 wrote:
...
Hi,
I am new to libvirt virsh console.
Currently I am working on Linux Containers(LXC). After lot of 
exploration, I am able to create a Linux Container(fedora12) with the 
help of lxc-tools(lxc-create, lxc-start, ...etc). I am able to start 
that container and use it's console. I am able to assign an IP address
...
to the container, by creating a bridge in the host machine and 
assigning it to the container.
Here, my goal is to bring up this container(fedora12) through libvirt 
virsh command prompt. For that I created a domain with the following 
XML
file:
[vm1_fedora_container.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'/>    /*This is the rootfs
directory for my linux container(fedora12)*/
          <target dir='/'/>  /* I mounted it to '/' directory in the 
Domain. */
        </filesystem>
<console type='pty' />
      </devices>
</domain>
I executed the following virsh commands:
# virsh --connect lxc:/// define vm1_fedora_container.xml Domain 
vm1_fedora defined from /root/lxc_devel/fedora.xml
# virsh --connect lxc:/// list --all
 Id Name                 State
----------------------------------
  - vm1_fedora           shut off
# virsh --connect lxc:/// start vm1_fedora Domain vm1_fedora started
# virsh --connect lxc:/// list --all
 Id Name                 State
----------------------------------
7805 vm1_fedora           running
# virsh --connect lxc:/// console vm1_fedora Connected to domain 
vm1_fedora Escape character is ^] [root@localhost /]#
I am able to view the console of my container(fedora12), but when I
execute 'ifconfig' in that console, I am getting the following error:
bash: ifconfig: command not found
The obvious question is whther ifconfig is installed inside your virtual
root filesystem, and whether $PATH is set correctly tobe able to fnid
it.

Regards,
Daniel
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