I'm trying to get Kilo DevStack running on Xen within VirtualBox up and running. Following the guides from https://github.com/openstack-dev/devstack/blob/stable/kilo/tools/xen/README.md (here) and https://wiki.openstack.org/wiki/XenServer/VirtualBox (here) and using the https://github.com/openstack-dev/devstack/blob/stable/kilo (Kilo DevStack) zip with the following localrc file:

GIT_BASE="http://github.com"

MYSQL_PASSWORD=openstack
SERVICE_TOKEN=openstack
ADMIN_PASSWORD=openstack
SERVICE_PASSWORD=openstack
RABBIT_PASSWORD=openstack
SWIFT_HASH="66a3d6b56c1f479c8b4e70ab5c2000f5"
GUEST_PASSWORD=openstack

XENAPI_PASSWORD=openstack

XENAPI_CONNECTION_URL="http://192.168.1.101"
VNCSERVER_PROXYCLIENT_ADDRESS=192.168.1.101

IMAGE_URLS=""

VIRT_DRIVER=xenserver
MULTI_HOST=1
ACTIVE_TIMEOUT=45

OSDOMU_MEM_MB=2048
OSDOMU_VDI_GB=12

RECLONE=no

LOGFILE=/tmp/devstack/log/stack.log
SCREEN_LOGDIR=/tmp/devstack/log/

EXTRA_OPTS=("xenapi_disable_agent=True")

the stack.sh script runs successfully:

This is your host ip: 192.168.1.102
Horizon is now available at http://192.168.1.102/
Keystone is serving at http://192.168.1.102:5000/
The default users are: admin and demo
The password: openstack
+ touch /opt/stack/runsh.succeeded
+ rm /opt/stack/run_sh.pid

however, on trying to create a test instance I get the following error No valid host was found. There are not enough hosts available. On further inspection, nova-compute service is not running as can be seen http://i.imgur.com/NAzbAC8.png (here). If I look at the nova-compute logs I see the following error:

2015-05-05 06:21:58.946 INFO nova.service [-] Starting compute node (version 2015.1.1)
...
2015-05-05 06:21:59.983 DEBUG oslo_concurrency.lockutils [req-4fbed445-4d63-4665-bee6-05f2bf74691c None None] Lock "sr-scan-OpaqueRef:9d5a41bd-66d7-3088-c47f-fc30cb0ec7ee" released by "do_scan" :: held 0.586s from (pid=14360) inner /usr/local/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py:456
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/poll.py", line 115, in wait
    listener.cb(fileno)
  File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 214, in main
    result = function(*args, **kwargs)
  File "/opt/stack/nova/nova/openstack/common/service.py", line 497, in run_service
    service.start()
  File "/opt/stack/nova/nova/service.py", line 183, in start
    self.manager.pre_start_hook()
  File "/opt/stack/nova/nova/compute/manager.py", line 1291, in pre_start_hook
    self.update_available_resource(nova.context.get_admin_context())
  File "/opt/stack/nova/nova/compute/manager.py", line 6237, in update_available_resource
    nodenames = set(self.driver.get_available_nodes())
  File "/opt/stack/nova/nova/virt/xenapi/driver.py", line 626, in get_available_nodes
    stats = self.host_state.get_host_stats(refresh=refresh)
  File "/opt/stack/nova/nova/virt/xenapi/driver.py", line 131, in host_state
    self._host_state = host.HostState(self._session)
  File "/opt/stack/nova/nova/virt/xenapi/host.py", line 149, in __init__
    self.update_status()
  File "/opt/stack/nova/nova/virt/xenapi/host.py", line 248, in update_status
    data.get("host_cpu_info")
  File "/opt/stack/nova/nova/virt/xenapi/host.py", line 335, in to_cpu_model
    topology["sockets"] = int(host_cpu_info["socket_count"])
KeyError: 'socket_count'
Removing descriptor: 3
2015-05-05 06:22:00.021 ERROR nova.openstack.common.threadgroup [req-77489ec0-015f-4b7a-8f0c-63ed6d2f3c2f None None] 'socket_count'
...

Has anybody got any idea why the following is breaking?

  File "/opt/stack/nova ...