Public bug reported: I'm seeing the following error locally:
Sep 12 18:52:25 compute-small nova-conductor[28968]: ERROR nova.scheduler.utils [None req-b86b25c8-c89e-4449-bec3-c94948402e02 demo admin] [instance: a4056430-ed06-4cea-91b9-e15fd4b1979f] Error from last host: compute-small (node compute-small): [u'Traceback (most recent call last):\n', u' File "/opt/stack/nova/nova/compute/manager.py", line 2038, in _do_build_and_run_instance\n filter_properties, request_spec)\n', u' File "/opt/stack/nova/nova/compute/manager.py", line 2408, in _build_and_run_instance\n instance_uuid=instance.uuid, reason=six.text_type(e))\n', u"RescheduledException: Build of instance a4056430-ed06-4cea-91b9-e15fd4b1979f was re-scheduled: No CPU model match traits, models: ['IvyBridge-IBRS'], required flags: set([None])\n"] This is affecting me when testing the 'PCPU' feature because we're rewriting the 'hw:cpu_thread_policy' to add a 'HW_CPU_HYPERTHREADING' trait, however, this can happen with any non-CPU flag trait (e.g. COMPUTE_SUPPORTS_MULTIATTACH) because of the following code: https://github.com/openstack/nova/blob/7a18209a8/nova/virt/libvirt/utils.py#L600 That will mean we can return a set contains 'None', which causes this later check to fail: https://github.com/openstack/nova/blob/7a18209a81539217a95ab7daad6bc67002768950/nova/virt/libvirt/driver.py#L4083 Since no CPU model will report a 'None' feature flag. ** Affects: nova Importance: Undecided Assignee: Stephen Finucane (stephenfinucane) Status: In Progress ** Tags: libvirt ** Description changed: I'm seeing the following error locally: Sep 12 18:52:25 compute-small nova-conductor[28968]: ERROR nova.scheduler.utils [None req-b86b25c8-c89e-4449-bec3-c94948402e02 demo admin] [instance: a4056430-ed06-4cea-91b9-e15fd4b1979f] Error from last host: compute-small (node compute-small): [u'Traceback (most recent call last):\n', u' File "/opt/stack/nova/nova/compute/manager.py", line 2038, in _do_build_and_run_instance\n filter_properties, request_spec)\n', u' File "/opt/stack/nova/nova/compute/manager.py", line 2408, in _build_and_run_instance\n instance_uuid=instance.uuid, reason=six.text_type(e))\n', u"RescheduledException: Build of instance a4056430-ed06-4cea-91b9-e15fd4b1979f was re-scheduled: No CPU model match traits, models: ['IvyBridge-IBRS'], required flags: set([None])\n"] This is affecting me when testing the 'PCPU' feature because we're rewriting the 'hw:cpu_thread_policy' to add a 'HW_CPU_HYPERTHREADING' - trait, however, this can happen with any non-CPU flag trait because of - the following code: + trait, however, this can happen with any non-CPU flag trait (e.g. + COMPUTE_SUPPORTS_MULTIATTACH) because of the following code: https://github.com/openstack/nova/blob/7a18209a8/nova/virt/libvirt/utils.py#L600 That will mean we can return a set contains 'None', which causes this later check to fail: https://github.com/openstack/nova/blob/7a18209a81539217a95ab7daad6bc67002768950/nova/virt/libvirt/driver.py#L4083 Since no CPU model will report a 'None' feature flag. -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1843836 Title: Failure to schedule if flavor contains non-CPU flag traits Status in OpenStack Compute (nova): In Progress Bug description: I'm seeing the following error locally: Sep 12 18:52:25 compute-small nova-conductor[28968]: ERROR nova.scheduler.utils [None req-b86b25c8-c89e-4449-bec3-c94948402e02 demo admin] [instance: a4056430-ed06-4cea-91b9-e15fd4b1979f] Error from last host: compute-small (node compute-small): [u'Traceback (most recent call last):\n', u' File "/opt/stack/nova/nova/compute/manager.py", line 2038, in _do_build_and_run_instance\n filter_properties, request_spec)\n', u' File "/opt/stack/nova/nova/compute/manager.py", line 2408, in _build_and_run_instance\n instance_uuid=instance.uuid, reason=six.text_type(e))\n', u"RescheduledException: Build of instance a4056430-ed06-4cea-91b9-e15fd4b1979f was re-scheduled: No CPU model match traits, models: ['IvyBridge-IBRS'], required flags: set([None])\n"] This is affecting me when testing the 'PCPU' feature because we're rewriting the 'hw:cpu_thread_policy' to add a 'HW_CPU_HYPERTHREADING' trait, however, this can happen with any non-CPU flag trait (e.g. COMPUTE_SUPPORTS_MULTIATTACH) because of the following code: https://github.com/openstack/nova/blob/7a18209a8/nova/virt/libvirt/utils.py#L600 That will mean we can return a set contains 'None', which causes this later check to fail: https://github.com/openstack/nova/blob/7a18209a81539217a95ab7daad6bc67002768950/nova/virt/libvirt/driver.py#L4083 Since no CPU model will report a 'None' feature flag. 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