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fix template type add .idea to .gitignore Change-Id: I723efef639ac2a683329a9a1fb77c6b815f04b7c
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ReStructuredText
275 lines
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ReStructuredText
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This work is licensed under a Creative Commons Attribution 3.0 Unported
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License.
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http://creativecommons.org/licenses/by/3.0/legalcode
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==========================================
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Example Spec - The title of your blueprint
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==========================================
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Include the URL of your launchpad blueprint:
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https://blueprints.launchpad.net/vitrage/+spec/example
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Introduction paragraph -- why are we doing anything? A single paragraph of
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prose that operators can understand. The title and this first paragraph
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should be used as the subject line and body of the commit message
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respectively.
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Some notes about using this template:
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* Your spec should be in reStructuredText, like this template.
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* Please wrap text at 79 columns.
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* The filename in the git repository should match the launchpad URL, for
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example a URL of: https://blueprints.launchpad.net/vitrage/+spec/awesome-thing
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should be named awesome-thing.rst
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* Please do not delete any of the sections in this template. If you have
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nothing to say for a whole section, just write: None
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* For help with syntax, see http://sphinx-doc.org/rest.html
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* To test out your formatting, build the docs using tox, or see:
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http://rst.ninjs.org
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* If you would like to provide a diagram with your spec, ascii diagrams are
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required. http://asciiflow.com/ is a very nice tool to assist with making
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ascii diagrams. The reason for this is that the tool used to review specs is
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based purely on plain text. Plain text will allow review to proceed without
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having to look at additional files which can not be viewed in gerrit. It
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will also allow inline feedback on the diagram itself.
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* If your specification proposes any changes to the Vitrage REST API such
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as changing parameters which can be returned or accepted, or even
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the semantics of what happens when a client calls into the API, then
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you should add the APIImpact flag to the commit message. Specifications with
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the APIImpact flag can be found with the following query:
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https://review.openstack.org/#/q/status:open+project:openstack/vitrage-specs+message:apiimpact,n,z
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Problem description
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===================
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A detailed description of the problem:
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* For a new feature this might be use cases. Ensure you are clear about the
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actors in each use case: End User vs Deployer
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* For a major reworking of something existing it would describe the
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problems in that feature that are being addressed.
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Proposed change
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===============
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Here is where you cover the change you propose to make in detail. How do you
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propose to solve this problem?
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If this is one part of a larger effort make it clear where this piece ends. In
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other words, what's the scope of this effort?
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Alternatives
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------------
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What other ways could we do this thing? Why aren't we using those? This doesn't
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have to be a full literature review, but it should demonstrate that thought has
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been put into why the proposed solution is an appropriate one.
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Data model impact
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-----------------
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Changes which require modifications to the data model often have a wider impact
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on the system. The community often has strong opinions on how the data model
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should be evolved, from both a functional and performance perspective. It is
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therefore important to capture and gain agreement as early as possible on any
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proposed changes to the data model.
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Questions which need to be addressed by this section include:
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* What new data objects and/or database schema changes is this going to
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require?
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* What database migrations will accompany this change.
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* How will the initial set of new data objects be generated, for example if you
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need to take into account existing instances, or modify other existing data
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describe how that will work.
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REST API impact
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---------------
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Each API method which is either added or changed should have the following
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* Specification for the method
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* A description of what the method does suitable for use in
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user documentation
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* Method type (POST/PUT/GET/DELETE)
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* Normal http response code(s)
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* Expected error http response code(s)
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* A description for each possible error code should be included
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describing semantic errors which can cause it such as
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inconsistent parameters supplied to the method, or when an
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instance is not in an appropriate state for the request to
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succeed. Errors caused by syntactic problems covered by the JSON
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schema definition do not need to be included.
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* URL for the resource
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* Parameters which can be passed via the url
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* Example use case including typical API samples for both data supplied
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by the caller and the response
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* Discuss any policy changes, and discuss what things a deployer needs to
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think about when defining their policy.
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Versioning impact
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-----------------
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Discuss how your change affects versioning and backward compatibility:
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* Can it break any existing DSL code even in theory?
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* If you make changes to Vitrage package please state how the version number
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should be incremented?
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* Does your change require newer version of external or internal component?
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* How to keep backward compatibility with code and consumers that were
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available prior to your change?
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Other end user impact
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---------------------
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Aside from the API, are there other ways a user will interact with this
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feature?
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* What does the user interface there look like?
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Deployer impact
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---------------
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Discuss things that will affect how you deploy and configure OpenStack
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that have not already been mentioned, such as:
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* What config options are being added? Should they be more generic than
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proposed (for example a flag that other hypervisor drivers might want to
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implement as well)? Are the default values ones which will work well in
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real deployments?
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* Is this a change that takes immediate effect after its merged, or is it
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something that has to be explicitly enabled?
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* If this change is a new binary, how would it be deployed?
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* Please state anything that those doing continuous deployment, or those
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upgrading from the previous release, need to be aware of. Also describe
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any plans to deprecate configuration values or features. For example, if we
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change the directory name that instances are stored in, how do we handle
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instance directories created before the change landed? Do we move them? Do
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we have a special case in the code? Do we assume that the operator will
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recreate all the instances in their cloud?
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Developer impact
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----------------
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Discuss things that will affect other developers working on OpenStack,
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such as:
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* If the blueprint proposes a change to the driver API, discussion of how
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other hypervisors would implement the feature is required.
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Horizon impact
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--------------
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Does it require changes to the horizon? If so, changes
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should be described well. If it's about complex changes than probably a
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separate blueprint / spec should be created for it.
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Implementation
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==============
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Assignee(s)
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-----------
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Who is leading the writing of the code? Or is this a blueprint where you're
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throwing it out there to see who picks it up?
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If more than one person is working on the implementation, please designate the
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primary author and contact.
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Primary assignee:
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<launchpad-id or None>
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Other contributors:
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<launchpad-id or None>
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Work Items
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----------
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Work items or tasks -- break the feature up into the things that need to be
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done to implement it. Those parts might end up being done by different people,
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but we're mostly trying to understand the timeline for implementation.
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Dependencies
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============
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* Include specific references to specs and/or blueprints in vitrage, or in other
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projects, that this one either depends on or is related to.
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* If this requires functionality of another project that is not currently used
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by Vitrage, document that fact.
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* Does this feature require any new library dependencies or code otherwise not
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included in OpenStack? Or does it depend on a specific version of library?
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Testing
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=======
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Please discuss how the change will be tested. We especially want to know what
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tempest tests will be added. It is assumed that unit test coverage will be
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added so that doesn't need to be mentioned explicitly, but discussion of why
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you think unit tests are sufficient and we don't need to add more tempest
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tests would need to be included.
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Is this untestable in gate given current limitations (specific hardware /
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software configurations available)? Is this untestable in vitrage-ci? If so,
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are there mitigation plans (3rd party testing, gate enhancements, etc).
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Documentation Impact
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====================
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What is the impact on the docs team of this change? Some changes might require
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donating resources to the docs team to have the documentation updated. Don't
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repeat details discussed above, but please reference them here.
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References
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==========
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Please add any useful references here. You are not required to have any
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reference. Moreover, this specification should still make sense when your
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references are unavailable. Examples of what you could include are:
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* Links to mailing list or IRC discussions
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* Links to notes from a summit session
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* Links to relevant research, if appropriate
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* Related specifications as appropriate (e.g. if it's an EC2 thing, link the
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EC2 docs)
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* Anything else you feel it is worthwhile to refer to |