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This seems indeed the problem (I will file an issue for the documentation).

Thanks a lot !

If I remove/fix that property from an image, I am now able to start new
instances using that image.

The problem is with instances created BEFORE removing the property: I am
not able to migrate them (using nova migrate), unless I remove
the ImagePropertiesFilter from the scheduler filters.

Moreover: if a user creates a snapshot of one of these instances, the
snapshot got created with this wrong property


Is there some clean way to remove/change the problematic property from the
relevant instances ?

Thanks, Massimo



On Wed, Jul 17, 2019 at 5:41 PM Brian Rosmaita <rosmaita.fossdev at gmail.com>
wrote:

> On 7/17/19 8:14 AM, Massimo Sgaravatto wrote:
> > We have just finished the update of our cloud to Rocky but we are seeing
> > a strange issue with images with property:
> > hypervisor_type='QEMU'
> >
> > The scheduling of instances created with such images fails because of
> > the ImagePropertiesFilter [*]
> >
> > Removing that property from the image, the scheduling works.
> > We also tried changing hypervisor_type='QEMU'
> > --> hypervisor_type='qemu', but this didn't help.
> >
> > Any suggestions?
>
> Commit e792d50efadb36437e82381f4c84d738cee25dfd in Ocata changed the
> image metadata that the ImagePropertiesFilter pays attention to:
>
> diff --git a/nova/scheduler/filters/image_props_filter.py
> b/nova/scheduler/filters/image_props_filter.py
> index 06def5c769..521a6816a3 100644
> --- a/nova/scheduler/filters/image_props_filter.py
> +++ b/nova/scheduler/filters/image_props_filter.py
> @@ -43,9 +43,9 @@ class ImagePropertiesFilter(filters.BaseHostFilter):
>
>      def _instance_supported(self, host_state, image_props,
>                              hypervisor_version):
> -        img_arch = image_props.get('architecture', None)
> -        img_h_type = image_props.get('hypervisor_type', None)
> -        img_vm_mode = image_props.get('vm_mode', None)
> +        img_arch = image_props.get('hw_architecture')
> +        img_h_type = image_props.get('img_hv_type')
> +        img_vm_mode = image_props.get('hw_vm_mode')
>          checked_img_props = (
>              arch.canonicalize(img_arch),
>              hv_type.canonicalize(img_h_type),
>
> Looks like 'img_hv_type' is the metadata key you need to use.
>
> If that works, please put up a patch to the Glance "useful image
> properties" docs [0], we seem to be out of date on this issue.
>
> [0]
>
> https://opendev.org/openstack/glance/src/branch/master/doc/source/admin/useful-image-properties.rst
>
> cheers,
> brian
>
> > Thanks, Massimo
> >
> >
> >
> > [*]
> > 2019-07-17 13:52:58.148 13312 INFO nova.filters
> > [req-1863bef0-0326-46d1-a836-436227e91eef
> > 6e3b136d578f4292a5c03b16f443ab3d d27fe2becea94a3e980fb9f66e2f291a -
> > default default] Filtering removed all hosts f\
> > or the request with instance ID '63810b60-76e4-4e76-a1c3-e4d3932c002e'.
> > Filter results: ['AggregateMultiTenancyIsolation: (start: 49, end: 37)',
> > 'AggregateInstanceExtraSpecsFilter: (start: 37, end: 34)', \
> > 'RetryFilter: (start: 34, end: 34)', 'AvailabilityZoneFilter: (start:
> > 34, end: 34)', 'ComputeFilter: (start: 34, end: 32)',
> > 'ComputeCapabilitiesFilter: (start: 32, end: 32)',
> > 'ImagePropertiesFilter: (star\
> > t: 32, end: 0)']
>
>
>
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