This issue is similar to bug #1091688.

Since version 3.3 of RHEV, our script to create virtual machines
automatically have been unable to update the VM description.  This is
rather fatal for us, as we use the description to track the VM status
across several stages in the creation process.

This is how the script fail:

[root@rhev ~]# kinit -t /etc/sssd/krb5.keytab -k linuxsystem_ro@REALM; RHEVPASSWD=$(cat /etc/rhevm/admin-password) ./x.py -d
Found vm test.uio.no (under installation)
updating description
error: Updating VMs failed: 
status: 400
reason: Bad Request
detail: If Domain supplied, Domain name expected to be supplied as well.
Traceback (most recent call last):
  File "./x.py", line 94, in <module>
    main()
  File "./x.py", line 91, in main
    raise e
ovirtsdk.infrastructure.errors.RequestError: 
status: 400
reason: Bad Request
detail: If Domain supplied, Domain name expected to be supplied as well.
[root@rhevm ~]# 


This is the script in question.  Note, the failing call is the
vm.update() call after setting the description.


#!/usr/bin/python
# Run like this to avoid interactivity
# kinit -t /etc/sssd/krb5.keytab -k linuxsystem_ro@REALM; \
#   RHEVPASSWD=secret ./virtcreate

from ovirtsdk.api import API
from ovirtsdk.xml import params
import getpass
import time
import os.path
import syslog

##################
# HARDCODED VALUES
##################

cafile = '/etc/pki/ovirt-engine/ca.pem'
if not os.path.isfile(cafile):
    cafile = 'ca.pem'

rhevurl = "https://rhevm.uio.no:443/api"
rhevuser = "admin@internal"

def log(level, msg):
    global options
    limit = 1
    sysloglevel = syslog.LOG_INFO
    if options is not None and options.debug:
        limit = 2
    if 0 == level:
        sysloglevel = syslog.LOG_ERR
    if level <= limit:
        syslog.syslog(sysloglevel, msg)
        print msg

def main():
    global options
    rhevpwd = os.environ['RHEVPASSWD']
    if not rhevpwd:
        rhevpwd = getpass.getpass("RHEV password for %s: " % rhevuser)

    from optparse import OptionParser

    parser = OptionParser()
    parser.add_option("-d", "--debug",
                      action="store_true", dest="debug", default=False,
                      help="enable debug output")
    
    (options, args) = parser.parse_args()
    syslog.openlog("virtcreate-cleanup", 0, syslog.LOG_CRON)

    rhev = API(url=rhevurl,
               username=rhevuser, password=rhevpwd,
               ca_file=cafile)
    try:
        # Check if they already exist as virtual machines
        vms = rhev.vms.list()
        for vm in vms:
            hostname = vm.get_name()
            description = vm.get_description()
            log(2, 'Found vm %s (%s)' % (hostname, description))
            if 'under installation' == description:
                log(2, 'updating description')
                vm.description = 'installation running'
                vm = vm.update()
    except Exception, e:
        log(0, "error: Updating VMs failed: %s" % str(e))
        pass
    # Clean up
    rhev.disconnect()
    raise e

if __name__ == "__main__":
    main()

Can we get access to the RPM mentioned in bug #1091688 to test if it
solve our problem?

-- 
Happy hacking
Petter Reinholdtsen