ironic/releasenotes/notes/rescue-node-87e3b673c61ef62...

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---
features:
- |
Adds version 1.38 of the Bare Metal API, which provides supports for
rescuing (and unrescuing) a node. This includes:
* A node in the ``active`` provision state can be rescued via the
``GET /v1/nodes/{node_ident}/states/provision`` API, by specifying
``rescue`` as the ``target`` value, and a ``rescue_password``
value. When the node has been rescued, it will be in the ``rescue``
provision state. A rescue ramdisk will be running, configured with
the specified ``rescue_password``, and listening with ssh on the
tenant network.
* A node in the ``rescue`` provision state can be unrescued (to the
``active`` state) via the
``GET /v1/nodes/{node_ident}/states/provision`` API, by specifying
``unrescue`` as the ``target`` value.
* The ``rescue_interface`` field of the node resource. A rescue
interface can be set when creating or updating a node.
* It also exposes ``default_rescue_interface`` and
``enable_rescue_interfaces`` fields of the driver resource.
* Adds new configuration options ``[DEFAULT]/enabled_rescue_interfaces``
and ``[DEFAULT]/default_rescue_interface``. Rescue interfaces are
enabled via the ``[DEFAULT]/enabled_rescue_interfaces``. A default
rescue interface to use when creating or updating nodes can be
specified with the ``[DEFAULT]/enabled_rescue_interfaces``.
* Adds new options ``[conductor]/check_rescue_state_interval`` and
``[conductor]/rescue_callback_timeout`` to fail the rescue operation
upon timeout, for the nodes that are stuck in the rescue wait state.
* Adds support for providing separate ``rescuing`` network with its
security groups using new options ``[neutron]/rescuing_network`` and
``[neutron]/rescuing_network_security_groups`` respectively. It is
required to provide ``[neutron]/rescuing_network``.