首先需要定义extension manager类（我定义在/usr/lib/python2.7/site-packages/novaclient/v2/storage.py）：
1from novaclient import base
2
3class StorageExtensionManager(base.ManagerWithFind):
4 def list(self):
5 pass
6 def get_detail(self):
7 url = "/os-storage-pool/detail"
8 resp,body = self.api.client.get(url)
9 return body
StorageExtensionManager类的get_detail方法通过Nova Client对象向nova api发送GET /os-storage-pool/detail请求。这个请求最终会由之前博客中扩展的api处理
调用我们的客户端use_storage.py
1from novaclient.v2 import client as nova_client
2from novaclient.v2 import storage
3
4class ExtensionManagerMeta(object):
5 def __init__(self, name, manager_class):
6 self.name = name
7 self.manager_class = manager_class
8
9user = {
10 'username': 'nova',
11 'password': 'YOURPASS',
12 'tenant': 'service',
13 'authurl': 'http://YOURHOST:5000/v2.0',
14}
15
16def storage_client():
17 extensions = [ExtensionManagerMeta('storage', storage.StorageExtensionManager)]
18 client = nova_client.Client(user.get('username'), user.get('password'), project_id = user.get('tenant'), auth_url = user.get('authurl'), extensions = extensions)
19 return client.storage
20
21def get_storage_detail():
22 return storage_client.get_detail()
23
24if __name__ == '__main__':
25 print get_storage_detail()
26
这里的user定义了用户信息，ExtensionManagerMeta定义了extension manager的元数据类。
最后测试一下：
1python use_storage.py
2{"pool_name": "ssd"} 
