---
features:
  - |
    The following legacy notifications have been transformed to
    a new versioned payload:

    * ``aggregate.updatemetadata``
    * ``aggregate.updateprop``
    * ``instance.exists``
    * ``instance.live_migration._post``
    * ``instance.live.migration.force.complete``
    * ``instance.live_migration.post.dest``
    * ``instance.live_migration.rollback.dest``
    * ``instance.rebuild.scheduled``
    * ``metrics.update``
    * ``servergroup.addmember``

    Consult https://docs.openstack.org/nova/latest/reference/notifications.html
    for more information including payload samples.