Hi all

I wonder if you can give me a hand as i am new to openstack

I have followed the instructions on the install guide to install 3 nodes, I have got the dashboard installed ok and can add networks, and routers but when i try to run an instance I get the error No Valid hosts

here is the output from this command tail -f /var/log/nova/nova-scheduler.log | grep ERROR

2014-12-08 11:36:13.762 2673 ERROR nova.scheduler.filter_scheduler [req-d77194d4                                   -a5b2-4185-ab6e-e9a12a5024d5 0b188de927e34893acd94a489fb1e167 d0d944054e504a7eb2                                   ab114c0de98d63] [instance: 61db67f6-88bb-4c2d-924e-da82452c04c4] Error from last                                    host: compute1 (node compute1): [u'Traceback (most recent call last):\n', u'  F                                   ile "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1333, in _b                                   uild_instance\n    set_access_ip=set_access_ip)\n', u'  File "/usr/lib/python2.7                                   /dist-packages/nova/compute/manager.py", line 401, in decorated_function\n    re                                   turn function(self, context, *args, **kwargs)\n', u'  File "/usr/lib/python2.7/d                                   ist-packages/nova/compute/manager.py", line 1745, in _spawn\n    LOG.exception(_                                   (\'Instance failed to spawn\'), instance=instance)\n', u'  File "/usr/lib/python                                   2.7/dist-packages/nova/openstack/common/excutils.py", line 68, in __exit__\n                                       six.reraise(self.type_, self.value, self.tb)\n', u'  File "/usr/lib/python2.7/di                                   st-packages/nova/compute/manager.py", line 1742, in _spawn\n    block_device_inf                                   o)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py",                                    line 2288, in spawn\n    admin_pass=admin_password)\n', u'  File "/usr/lib/pytho                                   n2.7/dist-packages/nova/virt/libvirt/driver.py", line 2657, in _create_image\n                                       project_id=instance[\'project_id\'])\n', u'  File "/usr/lib/python2.7/dist-pac                                   kages/nova/virt/libvirt/imagebackend.py", line 192, in cache\n    *args, **kwarg                                   s)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/imagebackend                                   .py", line 383, in create_image\n    prepare_template(target=base, max_size=size                                   , *args, **kwargs)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/openstack                                   /common/lockutils.py", line 249, in inner\n    return f(*args, **kwargs)\n', u'                                     File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/imagebackend.py", line                                    182, in fetch_func_sync\n    fetch_func(target=target, *args, **kwargs)\n', u'                                     File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/utils.py", line 653, i                                   n fetch_image\n    max_size=max_size)\n', u'  File "/usr/lib/python2.7/dist-pack                                   ages/nova/virt/images.py", line 78, in fetch_to_raw\n    max_size=max_size)\n',                                    u'  File "/usr/lib/python2.7/dist-packages/nova/virt/images.py", line 72, in fet                                   ch\n    image_service.download(context, image_id, dst_path=path)\n', u'  File "/                                   usr/lib/python2.7/dist-packages/nova/image/glance.py", line 331, in download\n                                       _reraise_translated_image_exception(image_id)\n', u'  File "/usr/lib/python2.7                                   /dist-packages/nova/image/glance.py", line 329, in download\n    image_chunks =                                    self._client.call(context, 1, \'data\', image_id)\n', u'  File "/usr/lib/python2                                   .7/dist-packages/nova/image/glance.py", line 209, in call\n    return getattr(cl                                   ient.images, method)(*args, **kwargs)\n', u'  File "/usr/lib/python2.7/dist-pack                                   ages ...