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[Juan Pablo Suazo <1974470@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

As reported on https://bugs.launchpad.net/horizon/+bug/1202965, the data
brought by the responses from the Nova hypervisor API endpoint contain
inconsistencies between the data it provides and the names of the
response fields.

This causes Horizon to display incongruent information on the hypervisor
overview view, as the field for vCPUs used (vcpus_used) is really
providing the total number dedicated and shared CPUs used  while the
field for total vCPUs (vcpus) provides information only about shared
CPUs. This last field also doesn't account for the configured
cpu_allocation_ration.

This results on Horizon displaying, for example, uses of 5 out of 4
vCPUs, if an hypervisor is overcommitting cpus, or even uses of 4 out of
0 vCPUs, if all CPUs are configured as dedicated.

This is troublesome as Nova is, practically, deprecating the Hypervisor
API endpoints, see this accepted proposal that REMOVES the fields used
by horizon on the latest version of the API:
https://review.opendev.org/c/openstack/nova/+/764040/. A fix to the
contents of its response should not be expected as a solution.

A possible solution might be transitioning to the Placement API instead,
which appears to provide data more consistent data and is Being used in
Skyline.

** Affects: horizon
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1974470

Title:
  Nova is Deprecating Hypervisor API Endpoints

Status in OpenStack Dashboard (Horizon):
  New

Bug description:
  As reported on https://bugs.launchpad.net/horizon/+bug/1202965, the
  data brought by the responses from the Nova hypervisor API endpoint
  contain inconsistencies between the data it provides and the names of
  the response fields.

  This causes Horizon to display incongruent information on the
  hypervisor overview view, as the field for vCPUs used (vcpus_used) is
  really providing the total number dedicated and shared CPUs used
  while the field for total vCPUs (vcpus) provides information only
  about shared CPUs. This last field also doesn't account for the
  configured cpu_allocation_ration.

  This results on Horizon displaying, for example, uses of 5 out of 4
  vCPUs, if an hypervisor is overcommitting cpus, or even uses of 4 out
  of 0 vCPUs, if all CPUs are configured as dedicated.

  This is troublesome as Nova is, practically, deprecating the
  Hypervisor API endpoints, see this accepted proposal that REMOVES the
  fields used by horizon on the latest version of the API:
  https://review.opendev.org/c/openstack/nova/+/764040/. A fix to the
  contents of its response should not be expected as a solution.

  A possible solution might be transitioning to the Placement API
  instead, which appears to provide data more consistent data and is
  Being used in Skyline.

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