Python bindings to the OpenStack Nova API

This is a client for OpenStack Nova API. There’s a Python API (the novaclient module), and a command-line script (installed as nova). Each implements the entire OpenStack Nova API.

You’ll need credentials for an OpenStack cloud that implements the Compute API, such as TryStack, HP, or Rackspace, in order to use the nova client.

See also

You may want to read the OpenStack Compute Developer Guide – the overview, at least – to get an idea of the concepts. By understanding the concepts this library should make more sense.



Code is hosted at Submit bugs to the Nova project on Launchpad. Submit code to the openstack/python-novaclient project using Gerrit.


The preferred way to run the unit tests is using tox.

See Consistent Testing Interface for more details.

Deprecating commands

There are times when commands need to be deprecated due to rename or removal. The process for command deprecation is:

  1. Push up a change for review which deprecates the command(s).
  • The change should print a deprecation warning to stderr each time a deprecated command is used.
  • That warning message should include a rough timeline for when the command will be removed and what should be used instead, if anything.
  • The commit message on the change should include a DocImpact tag so it gets in the release notes.
  • The deprecation cycle is typically the first client release after the next full Nova server release so that there is at least six months of deprecation.
  1. Once the change is approved, have a member of the nova-release team release a new version of python-novaclient.

  2. Example:

    This change was made while the Nova 12.0.0 Liberty release was in development. The current version of python-novaclient at the time was 2.25.0. Once the change was merged, python-novaclient 2.26.0 was released. Since there was less than six months before 12.0.0 would be released, the deprecation cycle ran through the 13.0.0 Nova server release.

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