---
features:
  - |
    Adds support for providing custom configuration options for the Docker
    daemon via the ``docker_custom_config`` variable (JSON formatted).

upgrade:
  - |
    Docker engine configuration changes are now applied in
    ``/etc/docker/daemon.json`` file instead of altering the systemd unit
    (which gets removed if present).

deprecations:
  - |
    Configuring Docker daemon via ``docker_custom_option`` (used in systemd
    unit file) is deprecated in favour of ``docker_custom_config`` variable
    which adds options to ``/etc/docker/daemon.json``.