devstack/doc/source/overview.rst
Sean Dague 2686b36c32 Correct various inaccuracies in overview.rst
This still was referencing nova-network

Change-Id: Id584d3fd26482330f42319aee4cb36981066db55
2017-05-02 09:26:28 -04:00

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========
Overview
========
DevStack has evolved to support a large number of configuration options
and alternative platforms and support services. That evolution has grown
well beyond what was originally intended and the majority of
configuration combinations are rarely, if ever, tested. DevStack is not
a general OpenStack installer and was never meant to be everything to
everyone.
Below is a list of what is specifically is supported (read that as
"tested") going forward.
Supported Components
====================
Base OS
-------
*The OpenStack Technical Committee (TC) has defined the current CI
strategy to include the latest Ubuntu release and the latest RHEL
release.*
- Ubuntu: current LTS release plus current development release
- Fedora: current release plus previous release
- RHEL/Centos: current major release
- Other OS platforms may continue to be included but the maintenance of
those platforms shall not be assumed simply due to their presence.
Having a listed point-of-contact for each additional OS will greatly
increase its chance of being well-maintained.
- Patches for Ubuntu and/or Fedora will not be held up due to
side-effects on other OS platforms.
Databases
---------
*As packaged by the host OS*
- MySQL
Queues
------
*As packaged by the host OS*
- Rabbit
Web Server
----------
*As packaged by the host OS*
- Apache
OpenStack Network
-----------------
- Neutron: A basic configuration approximating the original FlatDHCP
mode using linuxbridge or OpenVSwitch.
Services
--------
The default services configured by DevStack are Identity (keystone),
Object Storage (swift), Image Service (glance), Block Storage
(cinder), Compute (nova), Networking (neutron), Dashboard (horizon),
Orchestration (heat)
Additional services not included directly in DevStack can be tied in to
``stack.sh`` using the :doc:`plugin mechanism <plugins>` to call
scripts that perform the configuration and startup of the service.
Node Configurations
-------------------
- single node
- multi-node configurations as are tested by the gate
Exercises
---------
The DevStack exercise scripts are no longer used as integration and gate
testing as that job has transitioned to Tempest. They are still
maintained as a demonstrations of using OpenStack from the command line
and for quick operational testing.