87c2db4dc6
This patch removes the mentioned drivers from ironic code tree. Per our third-party drivers policy they are unsupported, and there is no existing plan to have third-party CI for them. Nevertheless, if anybody still needs them, they are available in ironic-staging-drivers repo. Change-Id: I1219892bbc1b814d80b62c8ec89b90819071870f Related-Bug: #1640533
264 lines
12 KiB
ReStructuredText
264 lines
12 KiB
ReStructuredText
.. _code-contribution-guide:
|
||
|
||
=======================
|
||
Code Contribution Guide
|
||
=======================
|
||
|
||
This document provides some necessary points for developers to consider when
|
||
writing and reviewing Ironic code. The checklist will help developers get
|
||
things right.
|
||
|
||
Getting Started
|
||
===============
|
||
|
||
If you're completely new to OpenStack and want to contribute to the ironic
|
||
project, please start by familiarizing yourself with the `Infra Team's Developer
|
||
Guide <http://docs.openstack.org/infra/manual/developers.html>`_. This will help
|
||
you get your accounts set up in Launchpad and Gerrit, familiarize you with the
|
||
workflow for the OpenStack continuous integration and testing systems, and help
|
||
you with your first commit.
|
||
|
||
LaunchPad Project
|
||
-----------------
|
||
|
||
Most of the tools used for OpenStack require a launchpad.net ID for
|
||
authentication.
|
||
|
||
.. seealso::
|
||
|
||
* https://launchpad.net
|
||
* https://launchpad.net/ironic
|
||
|
||
Related Projects
|
||
----------------
|
||
|
||
There are several projects that are tightly integrated with ironic and which are
|
||
developed by the same community.
|
||
|
||
.. seealso::
|
||
|
||
* https://launchpad.net/bifrost
|
||
* https://launchpad.net/ironic-inspector
|
||
* https://launchpad.net/ironic-lib
|
||
* https://launchpad.net/ironic-python-agent
|
||
* https://launchpad.net/python-ironicclient
|
||
* https://launchpad.net/python-ironic-inspector-client
|
||
|
||
Project Hosting Details
|
||
-----------------------
|
||
|
||
Bug tracker
|
||
http://launchpad.net/ironic
|
||
|
||
Mailing list (prefix Subject line with ``[ironic]``)
|
||
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
|
||
|
||
Wiki
|
||
http://wiki.openstack.org/Ironic
|
||
|
||
Code Hosting
|
||
https://git.openstack.org/cgit/openstack/ironic
|
||
|
||
Code Review
|
||
https://review.openstack.org/#/q/status:open+project:openstack/ironic,n,z
|
||
|
||
Adding New Features
|
||
===================
|
||
|
||
Starting with the Mitaka development cycle, Ironic tracks new features using
|
||
RFEs (Requests for Feature Enhancements) instead of blueprints. These are bugs
|
||
with 'rfe' tag, and they should be submitted before a spec or code is proposed.
|
||
When a member of `ironic-drivers launchpad team
|
||
<https://launchpad.net/~ironic-drivers/+members>`_ decides that the proposal
|
||
is worth implementing, a spec (if needed) and code should be submitted,
|
||
referencing the RFE bug. Contributors are welcome to submit a spec and/or code
|
||
before the RFE is approved, however those patches will not land until the RFE
|
||
is approved.
|
||
|
||
Here is a list of steps to do during the new process of adding a new feature to
|
||
Ironic:
|
||
|
||
#. Submit a bug report at https://bugs.launchpad.net/ironic/+filebug.
|
||
There are two fields that must be filled: 'summary' and
|
||
'further information'. The 'summary' must be brief enough to fit in one
|
||
line: if you can’t describe it in a few words it may mean that you are
|
||
either trying to capture more than one RFE at once, or that you are having
|
||
a hard time defining what you are trying to solve at all.
|
||
|
||
#. Describe the proposed change in the 'further information' field. The
|
||
description should provide enough details for a knowledgeable developer to
|
||
understand what is the existing problem in the current platform that needs
|
||
to be addressed, or what is the enhancement that would make the platform
|
||
more capable, both from a functional and a non-functional standpoint.
|
||
|
||
#. Submit the bug, add an 'rfe' tag to it and assign yourself or whoever is
|
||
going to work on this feature.
|
||
|
||
#. As soon as a member of the ironic-drivers team acknowledges the bug, it
|
||
will be moved into the 'Triaged' state. The importance will be set to
|
||
'Wishlist' to signal the fact that the report is indeed a feature and there
|
||
is no severity associated to it. Discussion about the RFE, and whether to
|
||
approve it, happens in bug comments while in the 'Triaged' state.
|
||
|
||
#. The ironic-drivers team will evaluate the RFE and may advise the submitter
|
||
to file a spec in ironic-specs to elaborate on the feature request, in case
|
||
the RFE requires extra scrutiny, more design discussion, etc. For the spec
|
||
submission process, please see the `Ironic Specs Process`_.
|
||
|
||
#. If a spec is not required, once the discussion has happened and there is
|
||
positive consensus among the ironic-drivers team on the RFE, the RFE is
|
||
'approved', and its tag will move from 'rfe' to 'rfe-approved'. This means
|
||
that the feature is approved and the related code may be merged.
|
||
|
||
#. If a spec is required, the spec must be submitted (with the bug properly
|
||
referenced as 'Partial-Bug' in the commit message), reviewed, and merged
|
||
before the RFE will be 'approved' (and the tag changed to 'rfe-approved').
|
||
|
||
#. The bug then goes through the usual process -- first to 'In progress' when
|
||
the spec/code is being worked on, then 'Fix Released' when it is
|
||
implemented.
|
||
|
||
#. If the RFE is rejected, the ironic-drivers team will move the bug to
|
||
"Won't Fix" status.
|
||
|
||
When working on an RFE, please be sure to tag your commits properly:
|
||
"Partial-Bug: #xxxx" or "Related-Bug: #xxxx" for intermediate commits for the
|
||
feature, and "Closes-Bug: #xxxx" for the final commit. It is also helpful to
|
||
set a consistent review topic, such as "bug/xxxx" for all patches related to
|
||
the RFE.
|
||
|
||
If the RFE spans across several projects (e.g. ironic and python-ironicclient),
|
||
but the main work is going to happen within ironic, please use the same bug for
|
||
all the code you're submitting, there is no need to create a separate RFE in
|
||
every project.
|
||
|
||
Note that currently the Ironic bug tracker is managed by the open 'ironic-bugs'
|
||
team, not the ironic-drivers team. This means that anyone may edit bug details,
|
||
and there is room to game the system here. **RFEs may only be approved by
|
||
members of the ironic-drivers team**. Attempts to sneak around this rule will
|
||
not be tolerated, and will be called out in public on the mailing list.
|
||
|
||
|
||
Live Upgrade Related Concerns
|
||
=============================
|
||
Ironic implements upgrade with the same methodology of Nova:
|
||
http://docs.openstack.org/developer/nova/upgrade.html
|
||
|
||
Ironic API RPC Versions
|
||
-----------------------
|
||
|
||
* When the signature(arguments) of an RPC method is changed, the following things
|
||
need to be considered:
|
||
|
||
- The RPC version must be incremented and be the same value for both the client
|
||
(conductor/rpcapi.py, used by ironic-api) and the server (conductor/manager.py,
|
||
used by ironic-conductor).
|
||
- New arguments of the method can only be added as optional. Existing arguments cannot be
|
||
removed or changed in incompatible ways (with the method in older RPC versions).
|
||
- Client-side can pin a version cap by passing ``version_cap`` to the constructor
|
||
of oslo_messaging.RPCClient. Methods which change arguments should run
|
||
client.can_send_version() to see if the version of the request is compatible with the
|
||
version cap of RPC Client, otherwise the request needs to be created to work with a
|
||
previous version that is supported.
|
||
- Server-side should tolerate the older version of requests in order to keep
|
||
working during the progress of live upgrade. The behavior of server-side should
|
||
depend on the input parameters passed from the client-side.
|
||
|
||
Object Versions
|
||
---------------
|
||
* When Object classes (subclasses of ironic.objects.base.IronicObject) are modified, the
|
||
following things need to be considered:
|
||
|
||
- The change of fields and the signature of remotable method needs a bump of object
|
||
version.
|
||
- The arguments of methods can only be added as optional, they cannot be
|
||
removed or changed in an incompatible way.
|
||
- Fields types cannot be changed. If it is a must, create a new field and
|
||
deprecate the old one.
|
||
- When new version objects communicate with old version objects,
|
||
obj_make_compatible() will be called to convert objects to the target version during
|
||
serialization. So objects should implement their own obj_make_compatible() to
|
||
remove/alter attributes which was added/changed after the target version.
|
||
- There is a test (object/test_objects.py) to generate the hash of object fields and the
|
||
signatures of remotable methods, which helps developers to check if the change of
|
||
objects need a version bump. The object fingerprint should only be updated with a
|
||
version bump.
|
||
|
||
Driver Internal Info
|
||
====================
|
||
The ``driver_internal_info`` node field was introduced in the Kilo release. It allows
|
||
driver developers to store internal information that can not be modified by end users.
|
||
Here is the list of existing common and agent driver attributes:
|
||
|
||
Common attributes:
|
||
* ``is_whole_disk_image``: A Boolean value to indicate whether the user image contains ramdisk/kernel.
|
||
* ``clean_steps``: An ordered list of clean steps that will be performed on the node.
|
||
* ``instance``: A list of dictionaries containing the disk layout values.
|
||
* ``root_uuid_or_disk_id``: A String value of the bare metal node's root partition uuid or disk id.
|
||
* ``persistent_boot_device``: A String value of device from ``ironic.common.boot_devices``.
|
||
* ``is_next_boot_persistent``: A Boolean value to indicate whether the next boot device is
|
||
``persistent_boot_device``.
|
||
|
||
Agent driver attributes:
|
||
* ``agent_url``: A String value of IPA API URL so that Ironic can talk to IPA ramdisk.
|
||
* ``hardware_manager_version``: A String value of the version of the hardware manager in IPA ramdisk.
|
||
* ``target_raid_config``: A Dictionary containing the target RAID configuration. This is a copy of
|
||
the same name attribute in Node object. But this one is never actually saved into DB and is only
|
||
read by IPA ramdisk.
|
||
|
||
.. note::
|
||
|
||
These are only some fields in use. Other vendor drivers might expose more ``driver_internal_info``
|
||
properties, please check their development documentation and/or module docstring for details.
|
||
It is important for developers to make sure these properties follow the precedent of prefixing their
|
||
variable names with a specific interface name (e.g., ilo_bar, drac_xyz), so as to minimize or avoid
|
||
any conflicts between interfaces.
|
||
|
||
|
||
Ironic Specs Process
|
||
====================
|
||
|
||
Specifications must follow the template which can be found at
|
||
`specs/template.rst <http://git.openstack.org/cgit/openstack/ironic-specs/tree/
|
||
specs/template.rst>`_, which is quite self-documenting. Specifications are
|
||
proposed by adding them to the `specs/approved` directory, adding a soft link
|
||
to it from the `specs/not-implemented` directory, and posting it for
|
||
review to Gerrit. For more information, please see the `README <http://git.
|
||
openstack.org/cgit/openstack/ironic-specs/tree/README.rst>`_.
|
||
|
||
The same `Gerrit process
|
||
<http://docs.openstack.org/infra/manual/developers.html>`_ as with source code,
|
||
using the repository `ironic-specs <http://git.openstack.org/cgit/openstack/
|
||
ironic-specs/>`_, is used to add new specifications.
|
||
|
||
All approved specifications are available at:
|
||
http://specs.openstack.org/openstack/ironic-specs. If a specification has
|
||
been approved but not completed within one or more releases since the
|
||
approval, it may be re-reviewed to make sure it still makes sense as written.
|
||
|
||
Ironic specifications are part of the `RFE (Requests for Feature Enhancements)
|
||
process <#adding-new-features>`_.
|
||
You are welcome to submit patches associated with an RFE, but they will have
|
||
a -2 ("do not merge") until the specification has been approved. This is to
|
||
ensure that the patches don't get accidentally merged beforehand. You will
|
||
still be able to get reviewer feedback and push new patch sets, even with a -2.
|
||
The `list of core reviewers <https://review.openstack.org/#/admin/groups/352,
|
||
members>`_ for the specifications is small but mighty. (This is not
|
||
necessarily the same list of core reviewers for code patches.)
|
||
|
||
Changes to existing specs
|
||
-------------------------
|
||
|
||
For approved but not-completed specs:
|
||
- cosmetic cleanup, fixing errors, and changing the definition of a feature
|
||
can be done to the spec.
|
||
|
||
For approved and completed specs:
|
||
- changing a previously approved and completed spec should only be done
|
||
for cosmetic cleanup or fixing errors.
|
||
- changing the definition of the feature should be done in a new spec.
|
||
|
||
|
||
Please see the `Ironic specs process wiki page <https://wiki.openstack.org/
|
||
wiki/Ironic/Specs_Process>`_ for further reference.
|