93 lines
3.4 KiB
ReStructuredText
93 lines
3.4 KiB
ReStructuredText
:title: GitHub
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.. _github:
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GitHub
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######
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GitHub is a code-hosting platform that, while not used for OpenStack
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development, is nonetheless frequently enough used by non-OpenStack projects
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that OpenStack has tooling interactions with it.
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At a Glance
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===========
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:Hosts:
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* review.openstack.org
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:Puppet:
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* https://git.openstack.org/cgit/openstack-infra/system-config/tree/
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* :cgit_file:`modules/openstack_project/manifests/gerrit.pp`
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* :cgit_file:`hiera/group/zuul-scheduler.yaml`
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:Projects:
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* https://git.openstack.org/cgit/openstack-infra/zuul
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* https://git.openstack.org/cgit/openstack-infra/jeepyb
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:Chat:
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* #openstack-infra on freenode
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Overview
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========
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There are currently three different forms of interaction with GitHub.
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* Gerrit Replication
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* Pull Request Closer
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* OpenStack Zuul App
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Gerrit Replication
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------------------
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Each project in gerrit is replicated on merge to a corresponding repository
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in GitHub. More information on this can be found in the :ref:`gerrit`
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document at :ref:`gerrit_github_integration`.
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Pull Request Closer
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-------------------
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A cronjob is run that looks for Pull Requests that have been erroneously
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submitted and closes them with a helpful message pointing people to the
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documentation on `Contributing to OpenStack`_. More information on this can
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be found in the :ref:`jeepyb` document at :ref:`closing_pull_requests`.
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.. _Contributing to OpenStack: http://docs.openstack.org/infra/manual/developers.html#getting-started
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.. _openstack_zuul_app:
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OpenStack Zuul App
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------------------
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Zuul v3 is integrated with GitHub by way of a `GitHub App`_. This is done to
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enable OpenStack to test integration with external projects that use GitHub
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for development. Information on configuring projects to use the OpenStack Zuul
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App can be found in the :ref:`zuul` page at :ref:`zuul_github_projects`.
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The OpenStack Zuul App is managed `OpenStack Zuul Settings Page`_ which is
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available to admins of the `openstack-infra Organization`_.
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The OpenStack Zuul App has an ID, a Private key, a Webhook secret and a set of
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OAuth Credentials which are all stored in hiera.
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The ID is a numerical identifier found on the App settings page labeled **ID**.
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The ID is placed into the ``app_id`` field in the ``github``
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entry in ``zuul_connection_secrets`` for the ``zuul-scheduler`` group.
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The Private key can only be retrieved when it is generated, so in the case it
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is lost a new one must be generated and the resulting value put into hiera.
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The Private key content is stored as ``zuul_github_app_key`` in private hiera
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and is written to ``/etc/zuul/github.key``. That path is placed into
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``app_key`` field in the ``github`` entry in ``zuul_connections`` for the
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``zuul-scheduler`` group.
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GitHub sends JSON payloads via HTTP POST to the URL configured in the Webhook
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URL setting. The current value of this setting for Zuul v3 is:
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https://zuul.openstack.org/connection/github/payload. It includes the
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configured "Webhook Secret" so that Zuul can verify that the payload actually
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did come from GitHub. The "Webhook Secret" is placed into the ``webhook_token``
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field in the ``github`` entry in ``zuul_connection_secrets`` for the
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``zuul-scheduler`` group.
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The OAuth credentials for the OpenStack Zuul App are currently unused.
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.. _GitHub App: https://developer.github.com/apps/
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.. _OpenStack Zuul Settings Page: https://github.com/organizations/openstack-infra/settings/apps/openstack-zuul.
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.. _openstack-infra Organization: https://github.com/organizations/openstack-infra/settings/profile
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