OpenStack Compute (Nova) Client
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Chris Dent 082ed80369 Update to microversion 2.27
This enables the use of the OpenStack-API-Version header, in
addition to the older X-OpenStack-Nova-API-Version header.

If the client knows that it is in a version less than 2.27, it
will not send the newer header.

If the client knows that is in a version >= 2.27 if it gets a
response that does not have the expected response header (the
newer one) it will warn. If it is in an older version, it will
warn about the other one missing.

A server that is 2.27 or beyond will accept both headers and
respond with both.

Change-Id: I1f7b1ca0fe795e4ecd333de761d96fff117969c0
2016-06-01 13:49:57 +00:00
doc The novaclient Python API doc keystoneauth example fixed 2016-03-02 14:25:29 +02:00
novaclient Update to microversion 2.27 2016-06-01 13:49:57 +00:00
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CONTRIBUTING.rst Workflow documentation is now in infra-manual 2014-12-05 03:30:40 +00:00
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Python bindings to the OpenStack Nova API

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This is a client for the OpenStack Nova API. There's a Python API (the novaclient module), and a command-line script (nova). Each implements 100% of the OpenStack Nova API.

See the OpenStack CLI guide for information on how to use the nova command-line tool. You may also want to look at the OpenStack API documentation.

python-novaclient is licensed under the Apache License like the rest of OpenStack.

Contents:

Command-line API

Installing this package gets you a shell command, nova, that you can use to interact with any OpenStack cloud.

You'll need to provide your OpenStack username and password. You can do this with the --os-username, --os-password and --os-tenant-name params, but it's easier to just set them as environment variables:

export OS_USERNAME=openstack
export OS_PASSWORD=yadayada
export OS_TENANT_NAME=myproject

You will also need to define the authentication url with --os-auth-url and the version of the API with --os-compute-api-version. Or set them as an environment variables as well:

export OS_AUTH_URL=http://example.com:8774/v2/
export OS_COMPUTE_API_VERSION=2

If you are using Keystone, you need to set the OS_AUTH_URL to the keystone endpoint:

export OS_AUTH_URL=http://example.com:5000/v2.0/

Since Keystone can return multiple regions in the Service Catalog, you can specify the one you want with --os-region-name (or export OS_REGION_NAME). It defaults to the first in the list returned.

You'll find complete documentation on the shell by running nova help

Python API

There's also a complete Python API, with documentation linked below.

To use with keystone as the authentication system:

>>> from novaclient import client
>>> nt = client.Client(VERSION, USER, PASSWORD, TENANT, AUTH_URL)
>>> nt.flavors.list()
[...]
>>> nt.servers.list()
[...]
>>> nt.keypairs.list()
[...]

Testing

There are multiple test targets that can be run to validate the code.

  • tox -e pep8 - style guidelines enforcement
  • tox -e py27 - traditional unit testing
  • tox -e functional - live functional testing against an existing openstack

Functional testing assumes the existence of a clouds.yaml file as supported by os-client-config (http://docs.openstack.org/developer/os-client-config) It assumes the existence of a cloud named devstack that behaves like a normal devstack installation with a demo and an admin user/tenant - or clouds named functional_admin and functional_nonadmin.