Python-keystoneclient is the identity service used by OpenStack for authentication (authN) and high-level authorization (authZ). It currently supports token-based authN with user/service authZ, and is scalable to support OAuth, SAML, and OpenID in future versions. Out of the box, Keystone uses SQLite for its identity store database, with the option to connect to external LDAP.

The oslo.i18n library contain utilities for working with internationalization (i18n) features, especially translation for text strings in an application or library.

This package provides a collection of Python deprecation patterns and strategies that help you collect your technical debt in a non-destructive manner.

Os-testr provides developers with a testr wrapper and an output filter for subunit.

Git-review is a command-line tool that helps submitting Git branches to Gerrit for review, or fetching existing ones.

This package provides a client library for building applications to work with OpenStack clouds. The SDK aims to provide a consistent and complete set of interactions with OpenStack’s many services, along with complete documentation, examples, and tools.

The OpenStack Service Types Authority contains information about officiag OpenStack services and their historical service-type aliases. The data is in JSON and the latest data should always be used. This simple library exists to allow for easy consumption of the data, along with a built-in version of the data to use in case network access is for some reason not possible and local caching of the fetched data.

OpenStack Object Storage (code-named Swift) creates redundant, scalable object storage using clusters of standardized servers to store petabytes of accessible data. It is not a file system or real-time data storage system, but rather a long-term storage system for a more permanent type of static data that can be retrieved, leveraged, and then updated if necessary. Primary examples of data that best fit this type of storage model are virtual machine images, photo storage, email storage and backup archiving. Having no central "brain" or master point of control provides greater scalability, redundancy and permanence.

Python makes loading code dynamically easy, allowing you to configure and extend your application by discovering and loading extensions ("plugins") at runtime. Many applications implement their own library for doing this, using __import__ or importlib. Stevedore avoids creating yet another extension mechanism by building on top of setuptools entry points. The code for managing entry points tends to be repetitive, though, so stevedore provides manager classes for implementing common patterns for using dynamically loaded extensions.

Python makes loading code dynamically easy, allowing you to configure and extend your application by discovering and loading extensions ("plugins") at runtime. Many applications implement their own library for doing this, using __import__ or importlib. Stevedore avoids creating yet another extension mechanism by building on top of setuptools entry points. The code for managing entry points tends to be repetitive, though, so stevedore provides manager classes for implementing common patterns for using dynamically loaded extensions.

The Oslo Concurrency Library provides utilities for safely running multi-thread, multi-process applications using locking mechanisms and for running external processes.

The oslo.log (logging) configuration library provides standardized configuration for all OpenStack projects. It also provides custom formatters, handlers and support for context specific logging (like resource id’s etc).

Reno is a tool for storing release notes in a git repository and building documentation from them.

The oslo.serialization library provides support for representing objects in transmittable and storable formats, such as JSON and MessagePack.

The OpenStack Service Types Authority contains information about officiag OpenStack services and their historical service-type aliases. The data is in JSON and the latest data should always be used. This simple library exists to allow for easy consumption of the data, along with a built-in version of the data to use in case network access is for some reason not possible and local caching of the fetched data.

The cliff framework allows creating multi-level commands such as those of subversion and git, where the main program handles some basic argument parsing and then invokes a sub-command to do the work. It uses plugins to define sub-commands, output formatters, and other extensions.

Python-hacking is a set of flake8 plugins that test and enforce the OpenStack style guidelines.

The Oslo configuration API supports parsing command line arguments and .ini style configuration files.

The oslo.i18n library contain utilities for working with internationalization (i18n) features, especially translation for text strings in an application or library.

The Python requests library bundles the urllib3 library, however, some software distributions modify requests to remove the bundled library. This makes some operations difficult, such as suppressing the “insecure platform warning” messages that urllib emits. This package is a simple library to find the correct path to exceptions in the requests library regardless of whether they are bundled or not.

This is a set of integration tests to be run against a live OpenStack cluster. Tempest has batteries of tests for OpenStack API validation, scenarios, and other specific tests useful in validating an OpenStack deployment.

The Oslo Test framework provides common fixtures, support for debugging, and better support for mocking results.

Tempest-lib is a functional testing library for OpenStack. It provides common features used in Tempest.

Keystoneauth provides a standard way to do authentication and service requests within the OpenStack ecosystem. It is designed for use in conjunction with the existing OpenStack clients and for simplifying the process of writing new clients.