yakumo 0.7.3

Yet Another Unified OpenStack Client Library

Each OpenStack client library like python-novaclient can handle only one OpenStack program, so we have to use multiple client libraries/commands to use OpenStack platform. Yakumo is an “unified” OpenStack client library. Its basic usage is similar to python-novaclient and others, but it can handle multiple programs (Nova, Glance, Cinder, Neutron and Keystone now) and it’s easy to manage multiple resources on the multiple programs with it.

Yes, there is another unified OpenStack client library named ‘python-openstacksdk’. But its API style is different from python-novaclient and others. That is the reason I created Yakumo by myself.

Basic Usage

Yakumo contains a simple sample OpenStack shell named ‘ossh’. For example,

bash$ ossh --os-cloud=packstack --verbose
>>>
Welcome to bpython! Press <F1> for help.

‘c’ is a client object defined in ossh, using credential information from environment variables. Of course, you can define another client object by yourself. See ossh source code for details.

ossh has code completion capability of bpython. Type “c.”:

>>> c.agent
+--------------------------------------------------------------------------------------------------------------+
| agent                         aggregate                     availability_zone                                |
| certificate                   cinder                        cloudpipe                                        |
| consistency_group             consistency_group_snapshot    endpoint                                         |
| fixed_ip                      flavor                        floating_ip                                      |
| floating_ip_bulk              floating_ip_dns               glance                                           |
| host                          hypervisor                    image                                            |
| key_pair                      keystone                      lb                                               |
| lbaas                         network                       network_quota                                    |
| neutron                       nova                          port                                             |
| project                       quota_set                     role                                             |
| router                        security_group                security_group_default_rule                      |
| server                        server_group                  service                                          |
| subnet                        subnet_pool                   user                                             |
| volume                        volume_backup                 volume_snapshot                                  |
| volume_transfer               volume_type                   volume_type_qos_spec                             |
| vpn                                                                                                          |
+--------------------------------------------------------------------------------------------------------------+

c.CATEGORY.list() returns a list of resource objects:

>>> c.image.list()
[<yakumo.glance.v2.image.Resource (id="887b0393-5065-4bcf-941d-623100baa06e", name="trusty")>]
>>>

c.CATEGORY.find(cond) returns a list of resource objects matched to cond:

>>> c.flavor.find(vcpus=1)
[<yakumo.nova.v2.flavor.Resource (id="1", name="m1.tiny")>, <yakumo.nova.v2.flavor.Resource (id="2", name="m1.small")>]
>>>

c.CATEGORY.find_one(cond) returns a resource object matched to cond:

>>> i = c.image.find_one(name="trusty")
>>> f = c.flavor.find_one(name='m1.small')
>>> k = c.key_pair.find_one(name='key1')
>>> n = c.network.find_one(name='private')
>>> i, f, k, n
(<yakumo.glance.v2.image.Resource (id="887b0393-5065-4bcf-941d-623100baa06e", name="trusty")>, <yakumo.nova.v2.flavor.Resource (id="2"
, name="m1.small")>, <yakumo.nova.v2.key_pair.Resource (name="key1")>, <yakumo.neutron.v2.network.Resource (id="22e3fa30-11c0-4065-bbf
7-8d8bbb50f63b", name="private")>)
>>>

pprint() is useful. It’s already imported

>>> pprint((i, f, k, n))
(<yakumo.glance.v2.image.Resource (id="887b0393-5065-4bcf-941d-623100baa06e", name="trusty")>,
 <yakumo.nova.v2.flavor.Resource (id="2", name="m1.small")>,
 <yakumo.nova.v2.key_pair.Resource (name="key1")>,
 <yakumo.neutron.v2.network.Resource (id="22e3fa30-11c0-4065-bbf7-8d8bbb50f63b", name="private")>)
>>>

get_attrs() method returns all attribute.

>>> pprint(f.get_attrs())
{'disk': 20,
 'ephemeral': 0,
 'id': u'2',
 'is_public': True,
 'name': u'm1.small',
 'ram': 2048,
 'rxtx_factor': 1.0,
 'swap': u'',
 'vcpus': 1}
>>>

You can see description of a method:

>>> c.server.create(
+--------------------------------------------------------------------------------------------------------------+
| c.server.create: (self, name=None, image=None, flavor=None, personality=None, block_devices=None,            |
| max_count=None, min_count=None, networks=None, security_groups=None, config_drive=False, key_pair=None,      |
| user_data=None)                                                                                              |
| create                                                                                                       |
| Create a new server                                                                                          |
|                                                                                                              |
| @keyword name: name of the new server (required)                                                             |
| @type name: str                                                                                              |
| @keyword flavor: Flavor object to use (required)                                                             |
| @type flavor: yakumo.nova.v2.flavor.Resource                                                                 |
| @keyword image: Image object to use for ephemeral disk                                                       |
| @type image: yakumo.image.Resource                                                                           |
| @keyword key_pair: KeyPair object to use                                                                     |
| @type key_pair: yakumo.nova.v2.key_pair.Resource                                                             |
| @keyword networks: list of networks or ones with tag and/or fixed IP                                         |
| @type networks: [yakumo.network.Resource]                                                                    |
| @keyword security_groups: list of SecurityGroup object(s) to use                                             |
| @type security_groups: [yakumo.nova.v2.security_group.Resource]                                              |
| @keyword block_devices: block device mapping                                                                 |
| @type block_devices: [dict]                                                                                  |
| @keyword personality: file path and the content to embed                                                     |
| @type personality: dict                                                                                      |
| @keyword max_count: the maximum number of server(s) to create                                                |
| @type max_count: int                                                                                         |
| @keyword min_count: the minimun number of server(s) to create                                                |
| @type min_count: int                                                                                         |
| @keyword config_drive: config drive exists or not (bool)                                                     |
| @type config_drive: bool                                                                                     |
| @keyword user_data: content of a batch file (str)                                                            |
| @type user_data: str                                                                                         |
| @return: Created server                                                                                      |
| @rtype: yakumo.nova.v2.server.Resource                                                                       |
+--------------------------------------------------------------------------------------------------------------+

You can create a new resource:

>>> s = c.server.create(name='vm1', image=i, flavor=f, networks=[n], key_pair=k)
>>> s
<yakumo.nova.v2.server.Resource (id="b1477f6c-bbc4-4c37-ba05-14b935a5d08c" empty)>
>>>

‘s’ is an empty resource object for the new instance. “empty” means the object has only ID attribute. Other attributes will be loaded on-demand. For example, “print(s)” causes loading attributes.

>>> print(s)
<yakumo.nova.v2.server.Resource ({'status': u'BUILD', 'addresses': {u'private': [{u'OS-EXT-IPS-MAC:mac_addr': u'fa:16:3e:0a:73:d3', u'version': 4, u'addr': u'10.0.0.10', u'OS-EXT-IPS:type': u'fixed'}]}, 'access_ipv4': u'', 'created_at': datetime.datetime(2017, 2, 10, 3, 24, 22, tzinfo=tzutc()), 'updated_at': datetime.datetime(2017, 2, 10, 3, 24, 31, tzinfo=tzutc()), 'name': u'vm1', 'project': <yakumo.keystone.v2.project.Resource (id="68b7f45b07084546a089e75b29efae29" empty)>, 'host': <yakumo.nova.v2.host.Resource (name="packstack3" empty)>, 'key_pair': <yakumo.nova.v2.key_pair.Resource (name="key1" empty)>, 'user': <yakumo.keystone.v2.user.Resource (id="99605955005446c386a4c9bce4eaa7a1" empty)>, 'progress': 0, 'id': u'b1477f6c-bbc4-4c37-ba05-14b935a5d08c', 'access_ipv6': u''})>
>>>

Let’s confirm the keypair.

>>> s.key_pair
<yakumo.nova.v2.key_pair.Resource (name="key1" empty)>
>>>

You can update the information of ‘s’:

>>> s.reload()
>>>

Waiting server becomes active:

>>> s.wait_for_finished()
>>>

Let’s confirm status of the new instance.

>>> s.status
u'ACTIVE'
>>>

get_id() method returns its ID.

>>> s.get_id()
u'b1477f6c-bbc4-4c37-ba05-14b935a5d08c'
>>>

You can create a new resource object directly if you have its ID.

>>> s2 = c.server.get('b1477f6c-bbc4-4c37-ba05-14b935a5d08c')
>>> s2
<yakumo.nova.v2.server.Resource (id="b1477f6c-bbc4-4c37-ba05-14b935a5d08c", name="vm1")>
>>>

You can check the two objects are the same:

>>> s == s2
True
>>>

and delete one:

>>> s.delete()
>>>

How about this?

>>> for i in c.server.list(): i.delete()

CAUTION: YOUR INSTANCES WILL BE DELETED IF YOU RUN ABOVE.

Yes, that’s one of things I want to do.

Author

Akira Yoshiyama / akirayoshiyama at gmail.com

Project URL

https://github.com/yosshy/python-yakumo

License

Apache License Version 2.0

See LICENSE for more details.