This document details the transition roadmap for moving the neutron client’s OpenStack Networking API support, both the Python library and the neutron command-line interface (CLI), to the OpenStack Client (OSC) and the OpenStack Python SDK. This transition is being guided by the Deprecate individual CLIs in favour of OSC OpenStack spec. See the Neutron RFE, OSC neutron support etherpad and details below for the overall progress of this transition.
This transition will result in the neutron client’s neutron CLI being deprecated and then eventually removed. The neutron CLI will be replaced by OSC’s networking support available via the openstack CLI. This is similar to the deprecation and removal process for the keystone client’s keystone CLI. The neutron client’s Python library won’t be deprecated. It will be available along side the networking support provided by the OpenStack Python SDK.
Users of the neutron client’s command extensions will need to transition to the OSC plugin system before the neutron CLI is removed. Such users will maintain their OSC plugin commands within their own project and will be responsible for deprecating and removing their neutron CLI extension.
The neutron CLI version 6.x, without extensions, supports over 200 commands while the openstack CLI version 3.3.0 supports over 70 networking commands. Of the 70 commands, some do not have all of the options or arguments of their neutron CLI equivalent. With this large functional gap, a few critical questions for developers during this transition are “Which CLI do I change?”, “Where does my CLI belong?”, and “Which Python library do I change?” The answer depends on the state of a command and the state of the overall transition. Details are outlined in the tables below. Early stages of the transition will require dual maintenance.
Which CLI do I change?
neutron Command | openstack Command | CLI to Change |
---|---|---|
Exists | Doesn’t Exist | neutron |
Exists | In Progress | neutron and openstack (update related blueprint or bug) |
Exists | Exists | openstack (assumes command parity resulting in neutron being deprecated) |
Doesn’t Exist | Doesn’t Exist | openstack |
Where does my CLI belong?
If you are developing an API in any of the neutron repos the client-side support must be generally located in either the openstackclient or neutronclient repos. Whether the actual code goes into one or the other repo it depends on the nature of the feature, its maturity level, and/or the depth of feedback required during the development.
The table below provides an idea of what goes where. Generally speaking, we consider Core anything that is L2 and L3 related or that it has been located in the neutron repo for quite sometime, e.g. QoS or Metering, or that it is available in each neutron deployment irrespective of its configuration (e.g. auto-allocated-topology). Any client feature that falls into this categorization will need to be contributed in OSC. Any other that does not, will need to go into neutronclient, assuming that its server-side is located in a neutron controlled repo. This is a general guideline, when in doubt, please reach out to a member of the neutron core team for clarifications.
Networking Commands | OSC Plugin | OpenStack Project for openstack Commands |
---|---|---|
Core | No | python-openstackclient |
Extension (i.e. neutron stadium) | Yes | python-neutronclient (neutronclient/osc/v2/<extension>) |
Other | Yes | Applicable project owning networking resource |
When a repo stops being under neutron governance, its client-side counterpart will have to go through deprecation. Bear in mind that for grandfathered extensions like FWaaS v1, VPNaaS, and LBaaS v1, this is not required as the neutronclient is already deprecated on its own.
Which Python library do I change?
OpenStack Project for openstack Commands | Python Library to Change |
---|---|
python-openstackclient | python-openstacksdk |
python-neutronclient | python-neutronclient |
Other | Applicable project owning network resource |
Important: The actual name of the command object and/or action in OSC may differ from those used by neutron in order to follow the OSC command structure and to avoid name conflicts. The network prefix must be used to avoid name conflicts if the command object name is highly likely to have an ambiguous meaning. Developers should get new command objects and actions approved by the OSC team before proceeding with the implementation.
The “Core” group includes network resources that provide core neutron project features (e.g. network, subnet, port, etc.) and not advanced features in the neutron project (e.g. trunk, etc.) or advanced services in separate projects (FWaaS, LBaaS, VPNaaS, dynamic routing, etc.). The “Other” group applies projects other than the core neutron project. Contact the neutron PTL or core team with questions on network resource classification.
When adding or updating an openstack networking command to python-openstackclient, changes may first be required to the OpenStack Python SDK to support the underlying networking resource object, properties and/or actions. Once the OpenStack Python SDK changes are merged, the related OSC changes can be merged. The OSC changes may require an update to the OSC openstacksdk version in the requirements.txt file.
When adding an openstack networking command to python-openstackclient, you can optionally propose an OSC command spec which documents the new command interface before proceeding with the implementation.
Users of the neutron client’s command extensions must adopt the OSC plugin system for this transition. Such users will maintain their OSC plugin within their own project and should follow the guidance in the table above to determine which command to change.