[Libguestfs] [PATCH 1/2] fish: Add --network option.

[Richard W.M. Jones]

On Mon, Feb 18, 2013 at 04:28:48PM +0800, Mohua Li wrote:
> Hi Rich,
> 
> I'm checking this option, as i didn't find PATCH2/2 for this thread, i'm wondering how can i check the network
> address of the appliance? i just found the following in libvirt xml file,
> 
> ue="/var/tmp"/>\n    <qemu:arg value="-netdev"/>\n    <qemu:arg value="user,id=usernet,net=169.254.0.0/16"/>\n    <qemu:arg value="-device"/>\n    <qemu:arg value="virtio-net-pci,netdev=

What the --network option does is it sets up a user network.  This is
implemented in qemu in userspace (using a thing called SLiRP) and it
doesn't give the appliance a separate network address.

https://en.wikipedia.org/wiki/Slirp

Also it has some limitations:

http://libguestfs.org/virt-rescue.1.html#network

Nevertheless from guestfish you can test the network using debug
commands.  For example:

 $ guestfish --network -a /dev/null 
 
 Welcome to guestfish, the libguestfs filesystem interactive shell for
 editing virtual machine filesystems.
 
 Type: 'help' for help on commands
       'man' to read the manual
       'quit' to quit the shell
 
 ><fs> run
 ><fs> debug sh 'exec 3<>/dev/tcp/redhat.com/80; echo "GET /" >&3; cat <&3'
 [the redhat.com home page HTML should be printed here]

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines.  Tiny program with many
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http://people.redhat.com/~rjones/virt-top