Add specs hierarchy into refstack-client

Add specs folder, the readme with flow instructions and a spec example into
refstack-client in order to track proposed and implemented changes.

Change-Id: I3ec0b4b03f641d461021dc8dbbf6124aa0bd585b

doc/source/index.rst

@@ -2,12 +2,19 @@ Welcome to refstack-client's documentation!
 ===========================================
 
 Contents:
+-----------
 
 .. toctree::
-   :maxdepth: 2
+   :maxdepth: 4
+   :glob:
 
    readme
 
+   specs/newton/approved/*
+
+   specs/newton/implemented/*
+
 Indices and tables
 ==================
+
 * :ref:`search`

doc/source/specs

@@ -0,0 +1 @@
+../../specs/

specs/README.rst

@@ -0,0 +1,54 @@
+=======================
+Refstack-Client Specifications
+=======================
+
+This folder is used to hold design specifications for additions
+to the refstack-client project. Reviews of the specs are done in gerrit, using a
+similar workflow to how we review and merge changes to the code itself.
+
+The layout of this folder is as follows::
+
+    specs/<release>/
+    specs/<release>/approved
+    specs/<release>/implemented
+
+The lifecycle of a specification
+--------------------------------
+
+Specifications are proposed by adding an .rst file to the
+``specs/<release>/approved`` directory and posting it for review. You can
+find an example specification in ``/specs/template.rst``.
+
+Once a specification has been fully implemented, meaning a patch has landed,
+it will be moved to the ``implemented`` directory and the corresponding
+blueprint will be marked as complete.
+
+`Specifications are only approved for a single release`. If a specification
+was previously approved but not implemented (or not completely implemented),
+then the specification needs to be re-proposed by copying (not move) it to
+the right directory for the current release.
+
+Previously approved specifications
+----------------------------------
+
+The refstack-client specs directory was created during the Newton cycle.
+Therefore, the specs approved and implemented prior to the Newton cycle will
+be saved in the ``RefStack`` project.
+
+Others
+------
+
+Please note, Launchpad blueprints are still used for tracking the status of the
+blueprints. For more information, see::
+
+    https://wiki.openstack.org/wiki/Blueprints
+    https://blueprints.launchpad.net/refstack
+
+For more information about working with gerrit, see::
+
+    http://docs.openstack.org/infra/manual/developers.html#development-workflow
+
+To validate that the specification is syntactically correct (i.e. get more
+confidence in the Jenkins result), please execute the following command::
+
+    $ tox -e docs

specs/template.rst

@@ -0,0 +1,307 @@
+==========================================
+Example Spec - The title of your blueprint
+==========================================
+
+Include the URL of your launchpad blueprint:
+
+https://blueprints.launchpad.net/refstack/+spec/example
+
+Introduction paragraph -- why are we doing anything? A single paragraph of
+prose that operators can understand.
+
+Some notes about using this template:
+
+* Your spec should be in ReSTructured text, like this template.
+
+* Please wrap text at 80 columns.
+
+* The filename in the git repository should match the launchpad URL, for
+  example a URL of:
+  https://blueprints.launchpad.net/refstack/+spec/awesome-thing
+  should be named awesome-thing.rst
+
+* Please do not delete any of the sections in this template.  If you have
+  nothing to say for a whole section, just write: None
+
+* For help with syntax, see http://sphinx-doc.org/rest.html
+
+* To test out your formatting, build the docs using tox, or see:
+  http://rst.ninjs.org
+
+
+Problem description
+===================
+
+A detailed description of the problem:
+
+* For a new feature this might be use cases. Ensure you are clear about the
+  actors in each use case: End User vs Deployer
+
+* For a major reworking of something existing it would describe the
+  problems in that feature that are being addressed.
+
+
+Proposed change
+===============
+
+Here is where you cover the change you propose to make in detail. How do you
+propose to solve this problem?
+
+If this is one part of a larger effort make it clear where this piece ends. In
+other words, what's the scope of this effort?
+
+Alternatives
+------------
+
+What other ways could we do this thing? Why aren't we using those? This doesn't
+have to be a full literature review, but it should demonstrate that thought has
+been put into why the proposed solution is an appropriate one.
+
+Data model impact
+-----------------
+
+Changes which require modifications to the data model often have a wider impact
+on the system.  The community often has strong opinions on how the data model
+should be evolved, from both a functional and performance perspective. It is
+therefore important to capture and gain agreement as early as possible on any
+proposed changes to the data model.
+
+Questions which need to be addressed by this section include:
+
+* What new data objects and/or database schema changes is this going to require?
+
+* What database migrations will accompany this change.
+
+* How will the initial set of new data objects be generated, for example if you
+  need to take into account existing instances, or modify other existing data
+  describe how that will work.
+
+REST API impact
+---------------
+
+Each API method which is either added or changed should have the following
+
+* Specification for the method
+
+  * A description of what the method does suitable for use in
+    user documentation
+
+  * Method type (POST/PUT/GET/DELETE)
+
+  * Normal http response code(s)
+
+  * Expected error http response code(s)
+
+    * A description for each possible error code should be included
+      describing semantic errors which can cause it such as
+      inconsistent parameters supplied to the method, or when an
+      instance is not in an appropriate state for the request to
+      succeed. Errors caused by syntactic problems covered by the JSON
+      schema defintion do not need to be included.
+
+  * URL for the resource
+
+  * Parameters which can be passed via the url
+
+  * JSON schema definition for the body data if allowed
+
+  * JSON schema definition for the response data if any
+
+* Example use case including typical API samples for both data supplied
+  by the caller and the response
+
+* Discuss any policy changes, and discuss what things a deployer needs to
+  think about when defining their policy.
+
+Example JSON schema definitions can be found in the Nova tree
+http://git.openstack.org/cgit/openstack/nova/tree/nova/api/openstack/compute/schemas/v3
+
+Note that the schema should be defined as restrictively as
+possible. Parameters which are required should be marked as such and
+only under exceptional circumstances should additional parameters
+which are not defined in the schema be permitted (eg
+additionaProperties should be False).
+
+Reuse of existing predefined parameter types such as regexps for
+passwords and user defined names is highly encouraged.
+
+Security impact
+---------------
+
+Describe any potential security impact on the system.  Some of the items to
+consider include:
+
+* Does this change touch sensitive data such as tokens, keys, or user data?
+
+* Does this change alter the API in a way that may impact security, such as
+  a new way to access sensitive information or a new way to login?
+
+* Does this change involve cryptography or hashing?
+
+* Does this change require the use of sudo or any elevated privileges?
+
+* Does this change involve using or parsing user-provided data? This could
+  be directly at the API level or indirectly such as changes to a cache layer.
+
+* Can this change enable a resource exhaustion attack, such as allowing a
+  single API interaction to consume significant server resources? Some examples
+  of this include launching subprocesses for each connection, or entity
+  expansion attacks in XML.
+
+For more detailed guidance, please see the OpenStack Security Guidelines as
+a reference (https://wiki.openstack.org/wiki/Security/Guidelines).  These
+guidelines are a work in progress and are designed to help you identify
+security best practices.  For further information, feel free to reach out
+to the OpenStack Security Group at openstack-security@lists.openstack.org.
+
+Notifications impact
+--------------------
+
+Please specify any changes to notifications. Be that an extra notification,
+changes to an existing notification, or removing a notification.
+
+Other end user impact
+---------------------
+
+Aside from the API, are there other ways a user will interact with this feature?
+
+* Does this change have an impact on python-novaclient? What does the user
+  interface there look like?
+
+Performance Impact
+------------------
+
+Describe any potential performance impact on the system, for example
+how often will new code be called, and is there a major change to the calling
+pattern of existing code.
+
+Examples of things to consider here include:
+
+* A periodic task might look like a small addition but if it calls conductor or
+  another service the load is multiplied by the number of nodes in the system.
+
+* Scheduler filters get called once per host for every instance being created, so
+  any latency they introduce is linear with the size of the system.
+
+* A small change in a utility function or a commonly used decorator can have a
+  large impacts on performance.
+
+* Calls which result in a database queries (whether direct or via conductor) can
+  have a profound impact on performance when called in critical sections of the
+  code.
+
+* Will the change include any locking, and if so what considerations are there on
+  holding the lock?
+
+Other deployer impact
+---------------------
+
+Discuss things that will affect how you deploy and configure OpenStack
+that have not already been mentioned, such as:
+
+* What config options are being added? Should they be more generic than
+  proposed (for example a flag that other hypervisor drivers might want to
+  implement as well)? Are the default values ones which will work well in
+  real deployments?
+
+* Is this a change that takes immediate effect after its merged, or is it
+  something that has to be explicitly enabled?
+
+* If this change is a new binary, how would it be deployed?
+
+* Please state anything that those doing continuous deployment, or those
+  upgrading from the previous release, need to be aware of. Also describe
+  any plans to deprecate configuration values or features.  For example, if we
+  change the directory name that instances are stored in, how do we handle
+  instance directories created before the change landed?  Do we move them?  Do
+  we have a special case in the code? Do we assume that the operator will
+  recreate all the instances in their cloud?
+
+Developer impact
+----------------
+
+Discuss things that will affect other developers working on OpenStack,
+such as:
+
+* If the blueprint proposes a change to the driver API, discussion of how
+  other hypervisors would implement the feature is required.
+
+
+Implementation
+==============
+
+Assignee(s)
+-----------
+
+Who is leading the writing of the code? Or is this a blueprint where you're
+throwing it out there to see who picks it up?
+
+If more than one person is working on the implementation, please designate the
+primary author and contact.
+
+Primary assignee:
+  <launchpad-id or None>
+
+Other contributors:
+  <launchpad-id or None>
+
+Work Items
+----------
+
+Work items or tasks -- break the feature up into the things that need to be
+done to implement it. Those parts might end up being done by different people,
+but we're mostly trying to understand the timeline for implementation.
+
+
+Dependencies
+============
+
+* Include specific references to specs and/or blueprints in nova, or in other
+  projects, that this one either depends on or is related to.
+
+* If this requires functionality of another project that is not currently used
+  by Nova (such as the glance v2 API when we previously only required v1),
+  document that fact.
+
+* Does this feature require any new library dependencies or code otherwise not
+  included in OpenStack? Or does it depend on a specific version of library?
+
+
+Testing
+=======
+
+Please discuss how the change will be tested. We especially want to know what
+tempest tests will be added. It is assumed that unit test coverage will be
+added so that doesn't need to be mentioned explicitly, but discussion of why
+you think unit tests are sufficient and we don't need to add more tempest
+tests would need to be included.
+
+Is this untestable in gate given current limitations (specific hardware /
+software configurations available)? If so, are there mitigation plans (3rd
+party testing, gate enhancements, etc).
+
+
+Documentation Impact
+====================
+
+What is the impact on the docs team of this change? Some changes might require
+donating resources to the docs team to have the documentation updated. Don't
+repeat details discussed above, but please reference them here.
+
+
+References
+==========
+
+Please add any useful references here. You are not required to have any
+reference. Moreover, this specification should still make sense when your
+references are unavailable. Examples of what you could include are:
+
+* Links to mailing list or IRC discussions
+
+* Links to notes from a summit session
+
+* Links to relevant research, if appropriate
+
+* Related specifications as appropriate (e.g.  if it's an EC2 thing, link the EC2 docs)
+
+* Anything else you feel it is worthwhile to refer to