Nova virtual machine driver spec

Change-Id: I70bec71d5f41974bd0475016aeb9ce1790a33038
Partially-Implements: blueprint nova-compute-driver

specs/version0.5/nova-compute-driver.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
+
+===================
+Nova Compute Driver
+===================
+
+Blueprint: https://blueprints.launchpad.net/octavia/+spec/nova-compute-driver
+
+Octavia needs to interact with nova for creation of VMs for this version.  This
+spec will flesh out all the methods described in the compute-driver-interface
+with nova VM specific commands.
+
+Problem description
+===================
+This spec details operations for creating, updating, and modifying amphora that
+will hold the actual load balancer.  It will utilize the nova client python api
+version 3 for the nova specific requests and commands.
+
+Proposed change
+===============
+Expose nova operations
+
+- Build:  Will need to build a virtual machine according to configuration
+  parameters
+
+  - Will leverage the nova client ServerManager method "create" to build a
+    server
+
+- Get:  Will need to retrieve details of the virtual machine from nova
+
+  - Will leverage the nova client ServerManager method "get" to retrieve a
+    server, and return an amphora object
+
+- Delete:  Will need to remove a virtual machine
+
+  - Will leverage the nova client ServerManager method "delete" for removal of
+    server
+
+- Status:  Will need to retrieve the status of the virtual machine
+
+  - Will leverage the aforementioned get call to retrieve status of the server
+
+Alternatives
+------------
+None
+
+Data model impact
+-----------------
+Add fields to existing Amphora object
+
+REST API impact
+---------------
+None
+
+Security impact
+---------------
+None
+
+Notifications impact
+--------------------
+None
+
+Other end user impact
+---------------------
+None
+
+Performance Impact
+------------------
+None
+
+Other deployer impact
+---------------------
+None
+
+Developer impact
+----------------
+Will need a nova service account and necessary credentials stored in config
+
+Implementation
+==============
+
+Assignee(s)
+-----------
+trevor-vardeman
+
+Work Items
+----------
+Expose nova operations
+
+Dependencies
+============
+compute-driver-interface
+
+Testing
+=======
+Unit tests
+Functional tests
+
+Documentation Impact
+====================
+None
+
+References
+==========
+https://blueprints.launchpad.net/octavia/+spec/nova-compute-driver
+http://docs.openstack.org/developer/python-novaclient/api.html