---
upgrade:
  - |
    The default value for the "cpu_allocation_ratio", "ram_allocation_ratio"
    and "disk_allocation_ratio" configurations have been changed to ``None``.

    The ``initial_cpu_allocation_ratio``, ``initial_ram_allocation_ratio`` and
    ``initial_disk_allocation_ratio`` configuration options have been added to
    the ``DEFAULT`` group:

    - initial_cpu_allocation_ratio with default value 16.0
    - initial_ram_allocation_ratio with default value 1.5
    - initial_ram_allocation_ratio with default value 1.0

    These options help operators specify initial virtual CPU/ram/disk to
    physical CPU/ram/disk allocation ratios. These options are only used when
    initially creating the ``computes_nodes`` table record for a given
    nova-compute service.

    Existing ``compute_nodes`` table records with ``0.0`` or ``None`` values
    for ``cpu_allocation_ratio``, ``ram_allocation_ratio`` or
    ``disk_allocation_ratio`` will be migrated online when accessed or when
    the ``nova-manage db online_data_migrations`` command is run.

    For more details, refer to the `spec`__.

    .. __: https://specs.openstack.org/openstack/nova-specs/specs/stein/approved/initial-allocation-ratios.html