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+`DevStack </>`__
+
+-  `Overview <overview.html>`__
+-  `Changes <changes.html>`__
+-  `FAQ <faq.html>`__
+-  `git.openstack.org <https://git.openstack.org/cgit/openstack-dev/devstack>`__
+-  `Gerrit <https://review.openstack.org/#/q/status:open+project:openstack-dev/devstack,n,z>`__
+
+Overview DevStack from a cloud-height view
+------------------------------------------
+
+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 (for Python 2.6 testing).*
+
+-  Ubuntu: current LTS release plus current development release
+-  Fedora: current release plus previous release
+-  RHEL: 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
+-  PostgreSQL
+
+Queues
+~~~~~~
+
+*As packaged by the host OS*
+
+-  Rabbit
+-  Qpid
+
+Web Server
+~~~~~~~~~~
+
+*As packaged by the host OS*
+
+-  Apache
+
+OpenStack Network
+~~~~~~~~~~~~~~~~~
+
+*Default to Nova Network, optionally use Neutron*
+
+-  Nova Network: FlatDHCP
+-  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 Storage (Glance), Block Storage (Cinder),
+Compute (Nova), Network (Nova), Dashboard (Horizon), Orchestration
+(Heat)
+
+Additional services not included directly in DevStack can be tied in to
+``stack.sh`` using the `plugin mechanism <plugins.html>`__ to call
+scripts that perform the configuration and startup of the service.
+
+Node Configurations
+~~~~~~~~~~~~~~~~~~~
+
+-  single node
+-  multi-node is not tested regularly by the core team, and even then
+   only minimal configurations are reviewed
+
+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.
+
+© Openstack Foundation 2011-2014 — An
+`OpenStack <https://www.openstack.org/>`__
+`program <https://wiki.openstack.org/wiki/Programs>`__