[Libvir] ISCSI howto, example, etc?

[Mark Dehus]

The documentation on the new storage feature is either a little short,
or I totally missed it.  Anyway, I am looking for some help on how to
use it.  If anyone could maybe give me an example xml file that would
be incredibly helpful, because based on the format description I can't
exactly figure out what information I am supposed to put where (for
ISCSI).

Thanks!

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$ ./Mark

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[Libvir] Problems with defineXML in python..

[Mark Dehus]

I am having some problems getting libvirt under python to work properly. 
I can setup new domains by using the createLinux() function, but when I
attempt to use defineXML() it fails with no reason given other then
virDomainDefineXML() failed.  I am using the same XML file for both
functions.

This is on a Ubuntu 7.04 server running python 2.5  libvirt 0.1.8 (from
the ubuntu universe repo).

Here is my test code:

import libvirt
import sys
import xml
import random

try:
conn = libvirt.open(None)
except Exception, e:
print e
if conn == None:
print 'Failed to open connection to the hypervisor'
sys.exit(1)
create = True

if create:
xmlfile = open('webserv.xml')
xmldesc = xmlfile.read()
xmlfile.close()

try:
#webserv = conn.createLinux(xmldesc, 0)
webserv = conn.defineXML(xmldesc)
except Exception, e:
   print 'Failed to create webserv: %s' % e
   sys.exit(1)

if webserv is None:
print 'whoops this shouldnt happen!'

conn.create(webserv)

try:
print Domain 0: id %d running %s % (webserv.ID(), webserv.OSType())
print webserv.info()
print webserv.XMLDesc(0)
except Exception, e:
print e
#webserv.shutdown()

And the XML file:

domain type='xen' 
  namewebserv/name
  os
typelinux/type
kernel/boot/vmlinuz-2.6.19-4-generic-amd64/kernel
initrd/boot/initrd.img-2.6.19-4-generic-amd64/initrd
root/dev/hda1/root
  /os
  memory1024/memory
  vcpu1/vcpu
  on_poweroffdestroy/on_poweroff
  on_rebootrestart/on_reboot
  on_crashrestart/on_crash
  devices
interface type='bridge'
  source bridge='xenbr0'/
  mac address='00:16:3e:24:27:a5'/
  script path='vif-bridge'/
/interface
graphics type='vnc' port='5902'/
disk type='file' device='disk'
  driver name='tap' type='aio'/
  source file='/virtual/images/webserv/webserv.img'/
  target dev='hda1'/
/disk
console tty='/dev/pts/4'/
  /devices
/domain

Am I missing something simple, or is there a bug?

Thanks!

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