At this point it is not relevant any more and was seemingly a hardware problem.

-Kevin

> On Mar 21, 2018, at 11:14 AM, Konstantinos Samaras-Tsakiris <email address hidden> wrote:
> 
> Is this still relevant?
> 
> -- 
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1628168
> 
> Title:
>  Can't assign system with multiple GPUs to different VMs
> 
> Status in OpenStack Compute (nova):
>  Confirmed
> 
> Bug description:
>  I have an OS Mitaka deployment that was done by Fuel (9.0).
> 
>  I have a system with 8GPUs in a single box. We are trying to allow VMs
>  to request access to GPU resources via this box.
> 
>  I know that with PCI Passthrough you can only have a device assigned
>  to a single VM (e.g. 1 device <-> 1 VM). However, this box has 8 GPUs
>  (8 separate devices). So I want support (1GPU -> 1VM) * 8, or (2GPU ->
>  1VM) * 4, (4GPU -> 1VM) * 2, or (8GPU -> 1VM) * 1.
> 
>  I have successfully been able to get the system to have 1 GPU <-> 1
>  VM, however when I go to create another VM with a GPU I get "not
>  enough hosts found".
> 
>  This is what I have done so far.
> 
>  /etc/nova/nova.conf
> 
>  Add:
>   Pic_passthrough_whitelist = [{"vendor_id": "10de", "product_id": "17c2"}]
> 
>  sudo gedit /etc/modules and add:
>   pci_stub
>   vfio
>   vfio_iommu_type1
>   vfio_pci
>   kvm
>   kvm_intel
> 
>  Sudo vi /etc/default/grub
>   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_iommu=on vfio_iommu_type1.allow_unsafe_interrupts=1"
> 
>  //BLACKLIST
> 
>  sudo gedit /etc/initramfs-tools/modules
>   pci_stub ids=10de:17c2
>   sudo update-initramfs -u
> 
>  On Controller Node:
> 
>  Edit nova.conf
> 
>  Add specifically for GPU you want to use!
> 
>  pci_alias={"vendor_id":"10de", "product_id":"17c2", "name":"titanx"}
>   Add
> 
>  scheduler_driver=nova.scheduler.filter_scheduler.FilterScheduler
>   scheduler_available_filters=nova.scheduler.filters.all_filters
>   scheduler_available_filters=nova.scheduler.filters.pci_passthrough_filter.PciPassthroughFilter
>   scheduler_default_filters=RamFilter,ComputeFilter,AvailabilityZoneFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,PciPassthroughFilter
> 
>  #: source openrc
>   Nova flavor-key g1.xlarge set "pci_passthrough:alias"="titanx:1"
> 
>  Actual Results: 
>  When I go to create my second VM with the same flavor it errors out with this message. (If I create 1 VM it works and a GPU is assigned to that machine).
> 
>  Message: No valid host was found. There are not enough hosts available.
>   Code: 500
>   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 392, in build_instances context, request_spec, filter_properties) File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 436, in _schedule_instances hosts = self.scheduler_client.select_destinations(context, spec_obj) File "/usr/lib/python2.7/dist-packages/nova/scheduler/utils.py", line 372, in wrapped return func(*args, **kwargs) File "/usr/lib/python2.7/dist-packages/nova/scheduler/client/__init__.py", line 51, in select_destinations return self.queryclient.select_destinations(context, spec_obj) File "/usr/lib/python2.7/dist-packages/nova/scheduler/client/__init__.py", line 37, in __run_method return getattr(self.instance, __name)(*args, **kwargs) File "/usr/lib/python2.7/dist-packages/nova/scheduler/client/query.py", line 32, in select_destinations return self.scheduler_rpcapi.select_destinations(context, spec_obj) File "/usr/lib/python2.7/dist-packages/nova/scheduler/rpcapi.py", line 121, in select_destinations return cctxt.call(ctxt, 'select_destinations', **msg_args) File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 158, in call retry=self.retry) File "/usr/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 91, in _send timeout=timeout, retry=retry) File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 512, in send retry=retry) File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 503, in _send raise result
> 
>  Running SELECT * FROM pci_devices; on the nova database I get the
>  following
> 
>  http://imgur.com/a/voGki
> 
>  As you can see it shows 7 are available.
> 
>  Expected Results:
> 
>  Another VM created with 1 more GPU used from the system.
> 
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