Minimal Requirements for Incubation and Integrated Status


The process described here is obsolete. This document is retained only for historical reference. New projects seeking to become part of OpenStack should refer to the Requirements for new OpenStack Project applications instead.


The TC will evaluate the project scope and its complementarity with existing integrated projects and other official programs, look into the project technical choices, and check a number of requirements, including (but not limited to):


  • Project must have a clear and defined scope.

  • Project’s scope should represent a measured progression for OpenStack as a whole.

  • Project should not inadvertently duplicate functionality present in other OpenStack projects. If they do, they should have a clear plan and timeframe to prevent long-term scope duplication.

  • Project should leverage existing functionality in other OpenStack projects as much as possible


  • Project should have an active team of contributors

  • Project should not have a major architectural rewrite planned


  • Project must be hosted under stackforge (and therefore use git as its VCS)

  • Project must obey OpenStack coordinated project interface (such as tox, pbr, global-requirements…)

  • Project should use oslo libraries or oslo-incubator where appropriate

  • If project is not part of an existing program, it needs to file for a new program concurrently with the Incubation request, and fill the corresponding requirements.

  • Project must have a well-defined core review team, with reviews distributed amongst the team (and not being primarily done by one person)

  • Reviews should follow the same criteria as OpenStack projects (2 +2s before +A)

  • Project should use the official openstack lists for discussion


  • Project APIs should be reasonably stable

  • Project must have a REST API with at least a JSON entity representation

  • Project must have a Python client library API for its REST API

  • API service is made available as a WSGI application


  • Project must have a basic devstack-gate job set up

Documentation / User support

  • Project must have docs for developers who want to contribute to the project

  • Project should have API documentation for devs who want to add to the API, updated when the code is updated

Graduation to integrated

At the end of every cycle, incubated projects go through a graduation review to check if they are ready to be made an integral part of the next development cycle and be included in the next OpenStack integrated release. The TC will evaluate the technical maturity of the project and check a number of requirements, including (but not limited to):


  • Project must not duplicate functionality present in other OpenStack projects, unless the project has intentionally done so with the intent of replacing it.

  • In the case that a project has intentionally duplicated functionality of another project, or portion of a project, the new project must reach a level of functionality and maturity such that we are ready to deprecate the old code and remove it after a well defined deprecation cycle. The deprecation plan agreed to by the PTLs of each affected project, including details for how users will be able to migrate from the old to the new, must be submitted to the TC for review as a part of the graduation review.


  • Project must have a large and diverse team of contributors

  • Project must have completed integration work with other integrated projects, as communicated by the TC when accepted into incubation (that includes Dashboard integration if applicable)


  • Project must have a diverse core reviewers team (more than 4 people)

  • Core reviewers must enforce a minimum of 2 +2s before accepting a change

  • Project should have engaged with marketing team to check suitable official name

  • Project must use OpenStack task, defect and design tracker(s)


  • Project must have a devstack-gate job running. This gate job should install the project using devstack and then run tempest tests. This job should run and vote in the check and gate pipelines for the project. It is*not* required that this job is running for the projects it depends on. This demonstrates that it would be easy to add the project to the integrated gate after graduation.

  • Project must have decent unit test and functional tests coverage

  • Project must be compatible with all currently OpenStack-supported versions of Python

  • Project should have a decent record of triaging incoming bugs

Documentation / User support

  • Project must have end-user docs such as API use, CLI use, Dashboard use

  • Project should have installation docs providing install/deployment in an integrated manner similar to other OpenStack projects, including configuration reference information for all options

  • Project should have a proven history of providing user support (on the openstack@ mailing list and on Ask OpenStack)

Release management / Security

  • Project must have followed at least two common milestones (follow the common cycle at least since X-2)

  • Project must have had at least one of their milestones handled by the release management team (at least the X-3 milestone)

  • Project must provide a 2+ person team that will handle the project specific vulnerability process [3]

First Integrated Cycle Expectations

In the release cycle after the project has graduated, the TC expects the project to reach a level of maturity for its first integrated release. In order for the project to graduate, the TC will need to be confident that the project will reach that level of maturity in the time allowed.


  • The REST API must be declared stable and the project must commit to maintaining backwards compatibility

  • If the project has resources which would make sense to provision via a Heat template, then the project should have Heat integration which enables this

  • If the project has functionality which would make sense to be available in the Horizon dashboard, then the project should ensure that integration exists

  • If the project has resources which could be metered, then the project should expose methods that would allow Ceilometer to retrieve these metrics

  • The lifecycle of resources managed by the project should be externalized via notifications so that they can be consumed by other integrated projects


Seamless upgradability of OpenStack components remains the most requested feature by deployers and operators. Once a deployer of OpenStack has installed a cloud, there is an implicit expectation that it can be upgraded in place on the existing hardware without creating downtime for any of the active resources that the cloud manages.

Note: at this point in time we still consider it acceptable to require downtime of the API / control plane for upgrade, though encourage projects to develop ways to reduce or eliminate that need.

As such, we expect projects to have a path for inplace upgrading from:

  • one stable release to the next stable release (i.e. stable/havana => stable/icehouse)

  • from the most recent stable branch to upstream master (i.e. stable/icehouse => master during the Juno development cycle)

  • within points in master (i.e. from a commit that merged to the master branch two weeks ago, to the latest commit on the master branch). This is for supporting deployers who wish to continuously deploy their OpenStack clouds.

This requirement becomes relevant after the first stable release that a project ships in, however projects are encouraged to incorporate a culture of upgradability early in their project lifecycle.

In place upgrade also applies when migrating functionality out of one project into another, as in nova-volume => cinder, nova-network => neutron, nova-baremetal => ironic, and/or nova-scheduler -> gantt.


  • The project should prepare upgrade testing (currently grenade) during the first integrated cycle so that it is ready to enable upgrade testing jobs shortly after its first integrated release.