Placement API has double the allocation of resources as compared to the utilisation on the compute node

Issue

• The instance for which the allocation in placement API is 2x the resources specified in the flavor, is consuming the right set of resources i.e ram, vcpus, disk on the compute node which is inline with the defined resources.

• However, placement API has 2x the resources specified in the flavor associated with that instance.

  (overcloud) [stack@director ~]$ openstack flavor show m1-mid
  +----------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  | Field                      | Value                                                                                                                                                                                                                                                                        |
  +----------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  | OS-FLV-DISABLED:disabled   | False                                                                                                                                                                                                                                                                        |
  | OS-FLV-EXT-DATA:ephemeral  | 0                                                                                                                                                                                                                                                                            |
  | access_project_ids         | None                                                                                                                                                                                                                                                                         |
  | disk                       | 10                                                                                                                                                                                                                                                                           |
  | id                         | d288fc48-927b-43fa-beed-9a3cca4240f6                                                                                                                                                                                                                                         |
  | name                       | m1-mid                                                                                                                                                                                                                                                                         |
  | os-flavor-access:is_public | True                                                                                                                                                                                                                                                                         |
  | properties                 | aggregate_instance_extra_specs:hostAggr='test-agg', hw:cpu_policy='dedicated', hw:cpu_sockets='2', hw:mem_page_size='large', hw:numa_cpus.0='0,1', hw:numa_cpus.1='2,3', hw:numa_mem.0='8192', hw:numa_mem.1='8192', hw:numa_mempolicy='strict', hw:numa_nodes='2'             |
  | ram                        | 16384                                                                                                                                                                                                                                                                        |
  | rxtx_factor                | 1.0                                                                                                                                                                                                                                                                          |
  | swap                       |                                                                                                                                                                                                                                                                              |
  | vcpus                      | 4                                                                                                                                                                                                                                                                            |
  +----------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  

• Instance UUID: 171e1b31-c826-4348-b685-b16dd771d3e0

• Placement API Record:

    "171e1b31-c826-4348-b685-b16dd771d3e0": {
      "resources": {
        "DISK_GB": 20,
        "MEMORY_MB": 32768,
        "VCPU": 8
      }
  

• Resource consumption on the compute node:

  # grep -e '<uuid>' -e cpupin sos_commands/virsh/virsh_-r_dumpxml_instance-00000326
  <uuid>171e1b31-c826-4348-b685-b16dd771d3e0</uuid>
    <vcpupin vcpu='0' cpuset='58'/>
    <vcpupin vcpu='1' cpuset='14'/>
    <vcpupin vcpu='2' cpuset='27'/>
    <vcpupin vcpu='3' cpuset='71'/>