我是 OpenStack 客户端和 API 的新手
今天我试图连接到 Keystone，并创建一个这样的 Client 对象：
from keystoneauth1.identity import v3
from keystoneclient.exceptions import ClientException
from keystoneauth1.session import Session
from keystoneclient.v3.client import Client
def keystone_client(version=(3, ), auth_url=None, user_id=None, password=None, project_id=None):
auth = v3.Password(auth_url=auth_url,
user_id=user_id,
password=password,
project_id=project_id)
sess = Session(auth=auth)
try:
return Client(session=sess)
except ClientException as e:
print(e) # TODO: USE LOGGING
当我尝试使用具有管理员用户凭据的客户端并获取用户列表、项目列表、任何 keystone 功能时，例如：
client = keystone_client(...)
clinet.services.list()
client.users.list()
首先，try-except 块中客户端源代码中的这一行遇到异常并记录以下警告消息
LOG.warning('Failed to contact the endpoint at %s for discovery. Fallback '
'to using that endpoint as the base url.', url)
然后最后抛出一堆超时异常，回溯：
Failed to contact the endpoint at https://example:5000 for discovery. Fallback to using that endpoint as the base url.
Traceback (most recent call last):
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/urllib3/connection.py", line 159, in _new_conn
conn = connection.create_connection(
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/urllib3/util/connection.py", line 84, in create_connection
raise err
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/urllib3/util/connection.py", line 74, in create_connection
sock.connect(sa)
TimeoutError: [Errno 110] Connection timed out
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 670, in urlopen
httplib_response = self._make_request(
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 392, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.8/http/client.py", line 1255, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib/python3.8/http/client.py", line 1301, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib/python3.8/http/client.py", line 1250, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib/python3.8/http/client.py", line 1010, in _send_output
self.send(msg)
File "/usr/lib/python3.8/http/client.py", line 950, in send
self.connect()
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/urllib3/connection.py", line 187, in connect
conn = self._new_conn()
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/urllib3/connection.py", line 171, in _new_conn
raise NewConnectionError(
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7ffa929afb80>: Failed to establish a new connection: [Errno 110] Connection timed out
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/requests/adapters.py", line 439, in send
resp = conn.urlopen(
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 726, in urlopen
retries = retries.increment(
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/urllib3/util/retry.py", line 446, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='example', port=5000): Max retries exceeded with url: /users (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7ffa929afb80>: Failed to establish a new connection: [Errno 110] Connection timed out'))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/keystoneauth1/session.py", line 1012, in _send_request
resp = self.session.request(method, url, **kwargs)
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/requests/sessions.py", line 530, in request
resp = self.send(prep, **send_kwargs)
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/requests/sessions.py", line 643, in send
r = adapter.send(request, **kwargs)
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='example', port=5000): Max retries exceeded with url: /users (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7ffa929afb80>: Failed to establish a new connection: [Errno 110] Connection timed out'))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/debtcollector/renames.py", line 43, in decorator
return wrapped(*args, **kwargs)
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/keystoneclient/v3/users.py", line 132, in list
return super(UserManager, self).list(
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/keystoneclient/base.py", line 86, in func
return f(*args, **new_kwargs)
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/keystoneclient/base.py", line 448, in list
list_resp = self._list(url_query, self.collection_key)
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/keystoneclient/base.py", line 141, in _list
resp, body = self.client.get(url, **kwargs)
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/keystoneauth1/adapter.py", line 395, in get
return self.request(url, 'GET', **kwargs)
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/keystoneauth1/adapter.py", line 554, in request
resp = super(LegacyJsonAdapter, self).request(*args, **kwargs)
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/keystoneauth1/adapter.py", line 257, in request
return self.session.request(url, method, **kwargs)
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/keystoneauth1/session.py", line 921, in request
resp = send(**kwargs)
File "/home/arthur/codes/dir/test/venv/lib/python3.8/site-packages/keystoneauth1/session.py", line 1028, in _send_request
raise exceptions.ConnectFailure(msg)
keystoneauth1.exceptions.connection.ConnectFailure: Unable to establish connection to http://example:5000/users?: HTTPConnectionPool(host='example', port=5000): Max retries exceeded with url: /users (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7ffa929afb80>: Failed to establish a new connection: [Errno 110] Connection timed out'))
包括该用户列表在内的所有功能都可以在 Keystone Identity 原始 API 和 OpenStack 命令行客户端中正常工作。似乎 python-keystone-client 查看服务目录并确定它应该使用哪个端点，但最后，它决定使用的那个端点是一个内部端点，不应该直接使用。
还有其他人有这个问题吗？