197a264a3b
Deploy guides includes quickstart guide. Includes respect relative paths, but when quickstart includes vagrant doc, deploy-guide tries to locate the doc in its doctree (deploy-guide/source). This causes error 404 and deploy-guide post-gates to fail Change-Id: I05e49bbcef564ad4f3d80f0649ccf191d9f8b59d
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4.4 KiB
ReStructuredText
132 lines
4.4 KiB
ReStructuredText
.. _CONTRIBUTING:
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=================
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How To Contribute
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=================
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Basics
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======
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#. Our source code is hosted on `OpenStack Kolla-Ansible Git`_. Bugs should be
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filed on launchpad_.
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#. Please follow OpenStack `Gerrit Workflow`_ to contribute to Kolla.
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#. Note the branch you're proposing changes to. ``master`` is the current focus
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of development. Kolla project has a strict policy of only allowing backports
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in ``stable/branch``, unless when not applicable. A bug in a
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``stable/branch`` will first have to be fixed in ``master``.
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#. Please file a launchpad_ blueprint for any significant code change and a bug
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for any significant bug fix or add a TrivialFix tag for simple changes.
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See how to reference a bug or a blueprint in the commit message here_
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#. TrivialFix tags or bugs are not required for documentation changes.
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.. _OpenStack Kolla-Ansible Git: https://git.openstack.org/cgit/openstack/kolla-ansible/
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.. _launchpad: https://bugs.launchpad.net/kolla-ansible
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.. _here: https://wiki.openstack.org/wiki/GitCommitMessages
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Development Environment
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=======================
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Please follow our :doc:`/user/quickstart` to deploy your environment and test
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your changes.
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Please use the existing sandbox repository, available at
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https://git.openstack.org/cgit/openstack-dev/sandbox, for learning, understanding
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and testing the `Gerrit Workflow`_.
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.. _Gerrit Workflow: https://docs.openstack.org/infra/manual/developers.html#development-workflow
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Adding a new service
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====================
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Kolla aims to both containerise and deploy all services within the OpenStack
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"big tent". This is a constantly moving target as the ecosystem grows, so these
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guidelines aim to help make adding a new service to Kolla a smooth experience.
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When adding a role for a new service in Ansible, there are couple of patterns
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that Kolla uses throughout that should be followed.
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* The sample inventories
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Entries should be added for the service in each of
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``ansible/inventory/multinode`` and ``ansible/inventory/all-in-one``.
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* The playbook
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The main playbook that ties all roles together is in ``ansible/site.yml``,
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this should be updated with appropriate roles, tags, and conditions. Ensure
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also that supporting hosts such as haproxy are updated when necessary.
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* The common role
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A ``common`` role exists which sets up logging, ``kolla-toolbox`` and other
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supporting components. This should be included in all services within
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``meta/main.yml`` of your role.
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* Common tasks
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All services should include the following tasks:
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- ``reconfigure.yml`` : Used to push new configuration files to the host
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and restart the service.
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- ``pull.yml`` : Used to pre fetch the image into the Docker image cache
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on hosts, to speed up initial deploys.
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- ``upgrade.yml`` : Used for upgrading the service in a rolling fashion. May
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include service specific setup and steps as not all services can be
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upgraded in the same way.
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* Logrotation
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- For OpenStack services there should be a ``cron-logrotate-PROJECT.conf.j2``
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template file in ``ansible/roles/common/templates`` with the following
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content:
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.. code::
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"/var/log/kolla/PROJECT/*.log"
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{
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}
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- For OpenStack services there should be an entry in the ``services`` list
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in the ``cron.json.j2`` template file in ``ansible/roles/common/templates``.
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* Log delivery
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- For OpenStack services the service should add a new ``rewriterule`` in the
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``match`` element in the ``01-rewrite.conf.j2`` template file in
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``ansible/roles/common/templates/conf/filter`` to deliver log messages to
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Elasticsearch.
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* Documentation
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- For OpenStack services there should be an entry in the list
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``OpenStack services`` in the ``README.rst`` file.
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- For infrastructure services there should be an entry in the list
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``Infrastructure components`` in the ``README.rst`` file.
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* Syntax
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- All YAML data files should start with three dashes (``---``).
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Other than the above, most roles follow the following pattern:
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- ``Register``: Involves registering the service with Keystone, creating
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endpoints, roles, users, etc.
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- ``Config``: Distributes the config files to the nodes to be pulled into
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the container on startup.
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- ``Bootstrap``: Creating the database (but not tables), database user for
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the service, permissions, etc.
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- ``Bootstrap Service``: Starts a one shot container on the host to create
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the database tables, and other initial run time config.
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- ``Start``: Start the service(s).
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