The novaclient
Python API¶
Usage¶
First create a client instance with your credentials:
>>> from novaclient import client
>>> nova = client.Client(VERSION, USERNAME, PASSWORD, PROJECT_ID, AUTH_URL)
Here VERSION
can be a string or novaclient.api_versions.APIVersion
obj.
If you prefer string value, you can use 1.1
(deprecated now), 2
or
2.X
(where X is a microversion).
Alternatively, you can create a client instance using the keystoneauth session API:
>>> from keystoneauth1 import loading
>>> from keystoneauth1 import session
>>> from novaclient import client
>>> loader = loading.get_plugin_loader('password')
>>> auth = loader.load_from_options(auth_url=AUTH_URL,
... username=USERNAME,
... password=PASSWORD,
... project_id=PROJECT_ID)
>>> sess = session.Session(auth=auth)
>>> nova = client.Client(VERSION, session=sess)
If you have PROJECT_NAME instead of a PROJECT_ID, use the project_name parameter. Similarly, if your cloud uses keystone v3 and you have a DOMAIN_NAME or DOMAIN_ID, provide it as user_domain_(name|id) and if you are using a PROJECT_NAME also provide the domain information as project_domain_(name|id).
novaclient adds ‘python-novaclient’ and its version to the user-agent string that keystoneauth produces. If you are creating an application using novaclient and want to register a name and version in the user-agent string, pass those to the Session:
>>> sess = session.Session(
... auth=auth, app_name'nodepool', app_version'1.2.3')
If you are making a library that consumes novaclient but is not an end-user application, you can append a (name, version) tuple to the session’s additional_user_agent property:
>>> sess = session.Session(auth=auth)
>>> sess.additional_user_agent.append(('shade', '1.2.3'))
For more information on this keystoneauth API, see Using Sessions.
It is also possible to use an instance as a context manager in which case there will be a session kept alive for the duration of the with statement:
>>> from novaclient import client
>>> with client.Client(VERSION, USERNAME, PASSWORD,
... PROJECT_ID, AUTH_URL) as nova:
... nova.servers.list()
... nova.flavors.list()
...
It is also possible to have a permanent (process-long) connection pool, by passing a connection_pool=True:
>>> from novaclient import client
>>> nova = client.Client(VERSION, USERNAME, PASSWORD, PROJECT_ID,
... AUTH_URL, connection_pool=True)
Then call methods on its managers:
>>> nova.servers.list()
[<Server: buildslave-ubuntu-9.10>]
>>> nova.flavors.list()
[<Flavor: 256 server>,
<Flavor: 512 server>,
<Flavor: 1GiB server>,
<Flavor: 2GiB server>,
<Flavor: 4GiB server>,
<Flavor: 8GiB server>,
<Flavor: 15.5GiB server>]
>>> fl = nova.flavors.find(ram=512)
>>> nova.servers.create("my-server", flavor=fl)
<Server: my-server>
Warning
Direct initialization of novaclient.v2.client.Client
object
can cause you to “shoot yourself in the foot”. See launchpad bug-report
1493576 for more details.
Reference¶
See the module reference.