---
upgrade:
  - |
    The ``XenAPI`` driver, which was deprecated in the 20.0.0 (Train), has now
    been removed.

    A number of APIs that only worked with the ``XenAPI`` driver have been
    removed along with their related policy rules. Calling these APIs will now
    result in a ``410 (Gone)`` error response.

    * ``GET /os-agents``
    * ``POST /os-agents``
    * ``PUT /os-agents/{agent_id}``
    * ``DELETE /os-agents/{agent_id}``
    * ``POST /servers/{server_id}/action (resetNetwork)``

    The ``XenAPI`` specific policies have been removed:

    * ``os_compute_api:os-agents``
    * ``os_compute_api:os-agents:list``
    * ``os_compute_api:os-agents:create``
    * ``os_compute_api:os-agents:update``
    * ``os_compute_api:os-agents:delete``
    * ``os_compute_api:os-admin-actions:reset_network``

    The ``XenAPI`` specific configuration options have been removed.

    * ``[xenserver] agent_timeout``
    * ``[xenserver] agent_version_timeout``
    * ``[xenserver] agent_resetnetwork_timeout``
    * ``[xenserver] agent_path``
    * ``[xenserver] disable_agent``
    * ``[xenserver] use_agent_default``
    * ``[xenserver] login_timeout``
    * ``[xenserver] connection_concurrent``
    * ``[xenserver] cache_images``
    * ``[xenserver] image_compression_level``
    * ``[xenserver] default_os_type``
    * ``[xenserver] block_device_creation_timeout``
    * ``[xenserver] max_kernel_ramdisk_size``
    * ``[xenserver] sr_matching_filter``
    * ``[xenserver] sparse_copy``
    * ``[xenserver] num_vbd_unplug_retries``
    * ``[xenserver] ipxe_network_name``
    * ``[xenserver] ipxe_boot_menu_url``
    * ``[xenserver] ipxe_mkisofs_cmd``
    * ``[xenserver] connection_url``
    * ``[xenserver] connection_username``
    * ``[xenserver] connection_password``
    * ``[xenserver] vhd_coalesce_poll_interval``
    * ``[xenserver] check_host``
    * ``[xenserver] vhd_coalesce_max_attempts``
    * ``[xenserver] sr_base_path``
    * ``[xenserver] target_host``
    * ``[xenserver] target_port``
    * ``[xenserver] independent_compute``
    * ``[xenserver] running_timeout``
    * ``[xenserver] image_upload_handler``
    * ``[xenserver] image_handler``
    * ``[xenserver] introduce_vdi_retry_wait``
    * ``[xenserver] ovs_integration_bridge``
    * ``[xenserver] use_join_force``
    * ``[xenserver] console_public_hostname``
    * ``[DEFAULT] bandwidth_poll_interval``