python-tripleoclient/releasenotes/notes/ephemeral-heat-by-default-4...

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---
features:
- An ephemeral Heat process is now used by default for overcloud deployment.
On each overcloud management operation (deploy/update/upgrade), a
containerized Heat process will be started, the stack will be created new,
and then the Heat process will be stopped. The enable_heat option is
undercloud.conf is now defaulted to False.
deprecations:
- Setting enable_heat=True in undercloud.conf is deprecated.
- Using --heat-type=installed is deprecated with the openstack overcloud commands.