Merge "Hyper-V: Add Fibre Channel support"

specs/liberty/approved/hyperv-fibre-channel.rst

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+..
+ This work is licensed under a Creative Commons Attribution 3.0 Unported
+ License.
+
+ http://creativecommons.org/licenses/by/3.0/legalcode
+
+==========================================
+Hyper-V: Fibre channel support
+==========================================
+
+https://blueprints.launchpad.net/nova/+spec/hyperv-fibre-channel
+
+This blueprint proposes adding Fibre Channel support for the Hyper-V driver.
+
+Problem description
+===================
+
+At the moment, the Hyper-V driver supports attaching volumes only via iSCSI
+or SMB. In many cases, using FC based topologies might be desired.
+
+Use Cases
+----------
+
+This blueprint addresses deployers possessing FC based infrastructure.
+
+This will enable attaching volumes exported by Cinder FC based backends using
+the retrieved target informations such as WWN and LUN.
+
+Project Priority
+-----------------
+
+None
+
+Proposed change
+===============
+
+A new volume driver will be introduced, having a workflow similar to the iSCSI
+volume driver. This means that the volumes will be attached to the instances
+as pass-through disks, making this transparent to the guest.
+
+Alternatives
+------------
+
+An alternative would be exposing virtual HBAs to guests. Although this has
+some benefits in terms of performance, it requires the guest to take part in
+the volume attach proccess.
+
+Also, another limitation is that this scenario would be supported only in case
+of Windows Server guests.
+
+Data model impact
+-----------------
+
+None
+
+REST API impact
+---------------
+
+None
+
+Security impact
+---------------
+
+None
+
+Notifications impact
+--------------------
+
+None
+
+Other end user impact
+---------------------
+
+None
+
+Performance Impact
+------------------
+
+This will enable using high performance FC based storage.
+
+Other deployer impact
+---------------------
+
+The deployer will be responsible of properly configuring the HBA.
+
+Developer impact
+----------------
+
+None
+
+Implementation
+==============
+
+Assignee(s)
+-----------
+
+Primary assignee:
+  plucian
+
+Work Items
+----------
+
+* Implement the Fibre Channel volume driver
+
+Dependencies
+============
+
+None
+
+Testing
+=======
+
+This will be tested by the Hyper-V CI.
+
+Documentation Impact
+====================
+
+This feature will be documented.
+
+References
+==========
+
+None
+
+History
+=======
+
+None