Open Stack

Hi,

The docs are mostly talking about using OpenStack with XenServer (connecting via XenAPI), not using OpenStack with Xen+libvirt.

If you want to use Ubuntu as your host OS, you can use the xcp-xapi package to install get XenAPI running, or you can install XenServer on your system. In both cases you then run all the nova services in a domU, which can be Ubuntu.

If you want to stick with Xen+libvirt, there is the SUSE distro that might help you. I believe you want to deploy all the services in Dom0 when you are using Xen+libvirt. I don't know how well it will work when you run them in an unprivileged VM, I haven't tried libvirt+Xen+OpenStack.

Thanks,
John

From: Afef MDHAFFAR [mailto:afef.mdhaffar at gmail.com]
Sent: Thursday, September 6, 2012 12:41 PM
To: John Garbutt
Cc: openstack at lists.launchpad.net
Subject: Re: [Openstack] boot image + glance connection failed

Hi,

Thanks a lot for your answer.
Here is the link of the tutorial that I used to install OpenStack: http://docs.openstack.org/essex/openstack-compute/install/apt/openstack-install-guide-essex.pdf
Page 41 shows an overview of the architecture of OpenStack with Xen.
Actually, I am trying to use libvirt to connect to the hypervisor. I modified a little the code of openstack to make the connection to the hypervisor from a para virtualized domU possible (just modified the url to let make a remote connection).

Regards,
Afef
2012/9/5 John Garbutt <John.Garbutt at citrix.com<mailto:John.Garbutt at citrix.com>>
Hi,

Sorry for the slow response, I have been out of email contact.

You are best running all the services in a DomU, in the single server case.
You only need the xenapi plugins running on Dom0, assuming you are not running Quantum.

When you add the second machine, you only need compute, network (and console I think)

Can you please point me to the bit of the Essex install guide that tells you to run the other services in Dom0 so I can get that updated to stop any further confusion?

If you want to get something running quickly, I recommend trying DevStack. You can then using that as a template for a more production focused setup.

I hope that helps,
John

From: openstack-bounces+john.garbutt=citrix.com at lists.launchpad.net<mailto:citrix.com at lists.launchpad.net> [mailto:openstack-bounces+john.garbutt<mailto:openstack-bounces%2Bjohn.garbutt>=citrix.com at lists.launchpad.net<mailto:citrix.com at lists.launchpad.net>] On Behalf Of Afef MDHAFFAR
Sent: Tuesday, September 4, 2012 3:03 PM
To: openstack at lists.launchpad.net<mailto:openstack at lists.launchpad.net>
Subject: [Openstack] boot image + glance connection failed

Hi all,

I got these errors when trying to boot an image. There are related to glance. I install openstack on an Ubuntu 12.04 (with Xen Server).
Dom0 runs nova-api, glance service, nova-scheduler, nova-cert and nova-console.
DomU runs nova-compute and nova-network.

Do I have to install glance service on DomU????

Here are log errors (picked from nova-compute.log).


2012-09-04 15:54:40 ERROR nova.image.glance [req-a516f35c-4207-4180-86b9-3a85687067b7 cf8971efd8934844b559d26e238506cc 141d12e2431f47a5bf77f90da4800960] Connection error contacting glance server, retrying
2012-09-04 15:54:40 TRACE nova.image.glance Traceback (most recent call last):
2012-09-04 15:54:40 TRACE nova.image.glance   File "/usr/lib/python2.7/dist-packages/nova/image/glance.py", line 145, in _call_retry
2012-09-04 15:54:40 TRACE nova.image.glance     return getattr(client, name)(*args, **kwargs)
2012-09-04 15:54:40 TRACE nova.image.glance   File "/usr/lib/python2.7/dist-packages/glance/client.py", line 101, in get_image_meta
2012-09-04 15:54:40 TRACE nova.image.glance     res = self.do_request("HEAD", "/images/%s" % image_id)
2012-09-04 15:54:40 TRACE nova.image.glance   File "/usr/lib/python2.7/dist-packages/glance/common/client.py", line 58, in wrapped
2012-09-04 15:54:40 TRACE nova.image.glance     return func(self, *args, **kwargs)
2012-09-04 15:54:40 TRACE nova.image.glance   File "/usr/lib/python2.7/dist-packages/glance/common/client.py", line 420, in do_request
2012-09-04 15:54:40 TRACE nova.image.glance     headers=headers)
2012-09-04 15:54:40 TRACE nova.image.glance   File "/usr/lib/python2.7/dist-packages/glance/common/client.py", line 75, in wrapped
2012-09-04 15:54:40 TRACE nova.image.glance     return func(self, method, url, body, headers)
2012-09-04 15:54:40 TRACE nova.image.glance   File "/usr/lib/python2.7/dist-packages/glance/common/client.py", line 562, in _do_request
2012-09-04 15:54:40 TRACE nova.image.glance     raise exception.ClientConnectionError(e)
2012-09-04 15:54:40 TRACE nova.image.glance ClientConnectionError: There was an error connecting to a server
2012-09-04 15:54:40 TRACE nova.image.glance Details: [Errno 111] ECONNREFUSED
2012-09-04 15:54:40 TRACE nova.image.glance
2012-09-04 15:54:41 ERROR nova.rpc.amqp [req-a516f35c-4207-4180-86b9-3a85687067b7 cf8971efd8934844b559d26e238506cc 141d12e2431f47a5bf77f90da4800960] Exception during message handling
2012-09-04 15:54:41 TRACE nova.rpc.amqp Traceback (most recent call last):
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/rpc/amqp.py", line 253, in _process_data
2012-09-04 15:54:41 TRACE nova.rpc.amqp     rval = node_func(context=ctxt, **node_args)
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 114, in wrapped
2012-09-04 15:54:41 TRACE nova.rpc.amqp     return f(*args, **kw)
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 183, in decorated_function
2012-09-04 15:54:41 TRACE nova.rpc.amqp     sys.exc_info())
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
2012-09-04 15:54:41 TRACE nova.rpc.amqp     self.gen.next()
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 177, in decorated_function
2012-09-04 15:54:41 TRACE nova.rpc.amqp     return function(self, context, instance_uuid, *args, **kwargs)
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 657, in run_instance
2012-09-04 15:54:41 TRACE nova.rpc.amqp     do_run_instance()
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 945, in inner
2012-09-04 15:54:41 TRACE nova.rpc.amqp     retval = f(*args, **kwargs)
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 656, in do_run_instance
2012-09-04 15:54:41 TRACE nova.rpc.amqp     self._run_instance(context, instance_uuid, **kwargs)
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 457, in _run_instance
2012-09-04 15:54:41 TRACE nova.rpc.amqp     self._set_instance_error_state(context, instance_uuid)
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
2012-09-04 15:54:41 TRACE nova.rpc.amqp     self.gen.next()
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 426, in _run_instance
2012-09-04 15:54:41 TRACE nova.rpc.amqp     image_meta = self._check_image_size(context, instance)
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 504, in _check_image_size
2012-09-04 15:54:41 TRACE nova.rpc.amqp     image_meta = _get_image_meta(context, instance['image_ref'])
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 190, in _get_image_meta
2012-09-04 15:54:41 TRACE nova.rpc.amqp     return image_service.show(context, image_id)
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/image/glance.py", line 241, in show
2012-09-04 15:54:41 TRACE nova.rpc.amqp     _reraise_translated_image_exception(image_id)
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/image/glance.py", line 239, in show
2012-09-04 15:54:41 TRACE nova.rpc.amqp     image_id)
2012-09-04 15:54:41 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/image/glance.py", line 153, in _call_retry
2012-09-04 15:54:41 TRACE nova.rpc.amqp     reason=_('Maximum attempts reached'))
2012-09-04 15:54:41 TRACE nova.rpc.amqp GlanceConnectionFailed: Connection to glance failed: Maximum attempts reached
2012-09-04 15:54:41 TRACE nova.rpc.amqp


Thank you for your help,
Afef




--
Afef MDHAFFAR
http://www.redcad.org/members/mdhaffar/


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