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---
fixes:
- |
When ``etcd`` is used with ``cinder_coordination_backend``
and/or ``designate_coordination_backend``, the config has been changed
to use the ``etcd3gw`` (aka ``etcd3+http``) ``tooz`` coordination driver
instead of ``etcd3`` due to issues with the latter's availability and
stability. ``etcd3`` does not handle well eventlet-based services,
such as cinder's and designate's.
See bugs `1852086
<https://bugs.launchpad.net/kolla-ansible/+bug/1852086>`__ and `1854932
<https://bugs.launchpad.net/kolla-ansible/+bug/1854932>`__
for details.
See also `tooz change introducing etcd3gw
<https://review.opendev.org/466098>`__.
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