<commit_before>=========
 Grenade
=========

Grenade is an OpenStack test harness to exercise the upgrade process
between releases. It uses DevStack to perform an initial OpenStack
install and as a reference for the final configuration. Currently
Grenade can upgrade Keystone, Glance, Nova, Neutron, Cinder, Swift,
Ceilometer, and Ironic in their default DevStack configurations.

Goals
=====

Grenade has the following goals:

- Block unintentional project changes that would break the ``Theory of
  Upgrade``. Most Grenade fails that people hit are of this nature.
- Ensure that upgrading a cloud doesn't do something dumb like delete
  and recreate all your servers/volumes/networks.
- Be able to grow to support additional upgrade scenarios (like
  sideways migrations from one configuration to another equivalent
  configuration)

Theory of Upgrade
=================

Grenade works under the following theory of upgrade.<commit_msg>Link to theory of upgrade in README<commit_after>=========
 Grenade
=========

Grenade is an OpenStack test harness to exercise the upgrade process
between releases. It uses DevStack to perform an initial OpenStack
install and as a reference for the final configuration. Currently
Grenade can upgrade Keystone, Glance, Nova, Neutron, Cinder, Swift,
Ceilometer, and Ironic in their default DevStack configurations.

Goals
=====

Grenade has the following goals:

- Block unintentional project changes that would break the :ref:`Theory of
  Upgrade`. Most Grenade fails that people hit are of this nature.
- Ensure that upgrading a cloud doesn't do something dumb like delete
  and recreate all your servers/volumes/networks.
- Be able to grow to support additional upgrade scenarios (like
  sideways migrations from one configuration to another equivalent
  configuration)

.. _Theory of Upgrade:

Theory of Upgrade
=================

Grenade works under the following theory of upgrade.
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