Hi guys,
I currently have a working cloud with a working GPU passthrough setup
(CentOS/libvirt/Xen 4.1.2), now I need to work on adding this new resource to
openstack.
Here is the plan:
1. Create a new instance type (g1.small) with an extra spec like
"xpu_arch = radeon"
2. Modify the compute side so that nova-compute publishes this new
capability
I'm in between step 1 and step 2, so normally, when I try and launch a VM with
the new instance type, the scheduling should fail since there is no compute
node publishing this capability yet, but the scheduling does go through despite
having the ComputeFilter available.
My understanding is that by having:
scheduler_available_filters=nova.schedulre.filters.standard_filters
scheduler_default_filters=ComputeFilter
The ComputeFilter should try and ensure that the hosts satisfies the extra
specs but the filter is not doing its job since the VM is scheduler and casted
to the compute node although it does not advertise any of the extra spec.
The extra spec is definitely part of the instance_type, I can see it in the
scheduler log:
(TRUNCATED) u'8895af5063b176bef97ab81f076d57f3', u'min_disk': u'0',
u'is_public': True, u'deleted_at': None, u'properties': {u'os_type':
u'windows'}, u'size': 9256562688}, u'instance_type': {u'root_gb': 0,
u'deleted_at': None, u'name': u'g1.small', u'deleted': False, u'created_at':
u'2012-08-08 18:33:29', u'ephemeral_gb': 0, u'updated_at': None, u'memory_mb':
2048, u'vcpus': 1, u'extra_specs': {u'xpu_arch': u'radeon'}, u'swap': 0,
u'rxtx_factor': 1.0, u'flavorid': u'105', u'vcpu_weight': None, u'id': 6},
u'instance_properties': {u'vm_state': u'building', u'availability_zone':
(TRUNCATED)
So again, this VM should not be casted to any compute node and the scheduler
should complain about no host having the required capability but it does not...
the VM is instantiated on the one compute node even though it never published
the required capability.
It looks like the ComputeFilter is either not used properly or I'm missing
something. Basically I want the scheduler to fail when I launch the VM before
I start working on step 2.
Any help appreciated.
Boris
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