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Example Spec - The title of your blueprint

Include the URL of your launchpad blueprint:

https://blueprints.launchpad.net/tripleo

Introduction paragraph -- why are we doing anything? A single paragraph of prose that operators can understand.

Some notes about using this template:

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

Overview

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.

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 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.

Upgrade Impact

Describe potential upgrade impact on the system.

  • Is this change meant to become the default for deployments at some point in the future? How do we migrate existing deployments to that feature?
  • Can the system be upgraded to this feature using the upgrade hooks provided by the composable services framework?
  • 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?)
  • Please state anything that operators upgrading from the previous release need to be aware of. Do they need to perform extra manual operations?

Other End User Impact

Are there ways a user will interact with this feature?

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 small change in a utility function or a commonly used decorator can have a large impacts on performance.

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?

Developer Impact

Discuss things that will affect other developers working on OpenStack.

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 tripleo, 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 Tripleo (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.

Is this untestable in CI 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? 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