Ian Wienand 882b730fdf Update to openstackdocstheme

This modernises the openstack-infra documentation by switching to
openstackdocstheme.  Update dependencies as required.

To remove non-relevant stuff from conf.py, I have just taken the demo
file from openstackdocstheme and lightly modified it.

It seems later sphinx has included it's own ":file:" role which now
conflicts.  Change it it ":cgit_file:" in our documentation.  Remove
the custom header template which no longer applies.  Add the
post-2.0-pbr sphinx-based warning-as-error, which fixes the original
problem that I actually noticed that errors could slip through the
gate tests :)

Change-Id: Ic7bec57b971bb4c75fc839e7269d1f69a576b85c

2018-06-25 11:19:43 +10:00

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title: GitHub

GitHub

GitHub is a code-hosting platform that, while not used for OpenStack development, is nonetheless frequently enough used by non-OpenStack projects that OpenStack has tooling interactions with it.

At a Glance

Hosts

review.openstack.org

Puppet

Projects

Chat

#openstack-infra on freenode

Overview

There are currently three different forms of interaction with GitHub.

Gerrit Replication
Pull Request Closer
OpenStack Zuul App

Gerrit Replication

Each project in gerrit is replicated on merge to a corresponding repository in GitHub. More information on this can be found in the gerrit document at gerrit_github_integration.

Pull Request Closer

A cronjob is run that looks for Pull Requests that have been erroneously submitted and closes them with a helpful message pointing people to the documentation on Contributing to OpenStack. More information on this can be found in the jeepyb document at closing_pull_requests.

OpenStack Zuul App

Zuul v3 is integrated with GitHub by way of a GitHub App. This is done to enable OpenStack to test integration with external projects that use GitHub for development. Information on onfiguring projects to use the OpenStack Zuul App can be found in the zuul page at zuul_github_projects.

The OpenStack Zuul App is managed OpenStack Zuul Settings Page which is available to admins of the openstack-infra Organization.

The OpenStack Zuul App has an ID, a Private key, a Webhook secret and a set of OAuth Credentials which are all stored in hiera.

The ID is a numerical identifier found on the App settings page labeled ID. The ID is placed into the app_id field in the github entry in zuul_connection_secrets for the zuul-scheduler group.

The Private key can only be retrieved when it is generated, so in the case it is lost a new one must be generated and the resulting value put into hiera. The Private key content is stored as zuul_github_app_key in private hiera and is written to /etc/zuul/github.key. That path is placed into app_key field in the github entry in zuul_connections for the zuul-scheduler group.

GitHub sends JSON payloads via HTTP POST to the URL configured in the Webhook URL setting. The current value of this setting for Zuul v3 is: https://zuul.openstack.org/connection/github/payload. It includes the configured "Webhook Secret" so that Zuul can verify that the payload actually did come from GitHub. The "Webhook Secret" is placed into the webhook_token field in the github entry in zuul_connection_secrets for the zuul-scheduler group.

The OAuth credentials for the OpenStack Zuul App are currently unused.

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