Add Redfish vmedia boot interface to idrac HW type

This change adds idrac hardware type support of a virtual media boot
interface implementation that utilizes the Redfish out-of-band (OOB)
management protocol and is compatible with the integrated Dell Remote
Access Controller (iDRAC) baseboard management controller (BMC). It is
named 'idrac-redfish-virtual-media'.

The iDRAC Redfish Service almost entirely interoperates with the virtual
media boot workflow suggested by the Redfish standard. The only
difference is configuring the system to boot from the inserted virtual
media. The standard workflow expects it to be referred to as a CD-ROM or
floppy disk drive boot source, no different from their physical
counterparts. However, the iDRAC refers to them as virtual boot sources,
distinct from their physical counterparts. Presently, the standard does
not define virtual CD-ROM nor virtual floppy disk drive boot sources.
However, the iDRAC provides a Redfish OEM extension for setting the
system to boot from one of those virtual boot sources.

To circumvent the above issue, the Python class which implements
'idrac-redfish-virtual-media' is derived from the class which implements
the generic, vendor-independent 'redfish-virtual-media' interface. It
overrides the method which sets the boot device to facilitate use of the
aforementioned iDRAC Redfish Service OEM extension.

The idrac hardware type declares support for that new interface
implementation, in addition to all boot interface implementations it has
been supporting. The priority order is retained by assigning the new
'idrac-redfish-virtual-media' the lowest priority.

A new idrac hardware type Python package dependency is introduced. It is
on 'sushy-oem-idrac'.

[1] https://pypi.org/project/sushy-oem-idrac/

Co-Authored-By: Richard G. Pioso <richard.pioso@dell.com>
Story: 2006570
Task: 36675
Change-Id: I416019fc1ed3ab2a3a3dbc4443571123ef90e327

1 files changed, 21 insertions, 0 deletions

diff --git a/releasenotes/notes/idrac-add-redfish-boot-support-036396b48d3f71f4.yaml b/releasenotes/notes/idrac-add-redfish-boot-support-036396b48d3f71f4.yaml
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+---
+features:
+  - |
+    Adds ``idrac`` hardware type support of a virtual media boot
+    interface implementation that utilizes the Redfish out-of-band (OOB)
+    management protocol and is compatible with the integrated Dell
+    Remote Access Controller (iDRAC) baseboard management controller
+    (BMC). It is named ``idrac-redfish-virtual-media``.
+
+    The ``idrac`` hardware type declares support for that new interface
+    implementation, in addition to all boot interface implementations it
+    has been supporting. The highest priority boot interfaces remain the
+    same. It now supports the following boot interface implementations,
+    listed in priority order from highest to lowest: ``ipxe``, ``pxe``,
+    and ``idrac-redfish-virtual-media``.
+
+    To use the new boot interface, install the ``sushy-oem-idrac``
+    Python package.
+
+    For more information, see `story 2006570
+    <https://storyboard.openstack.org/#!/story/2006570>`_.