Openstack 无法连接到使用休息 api

Question

我在虚拟机上本地安装了 openstack。我正在尝试使用 lib cloud api 连接并获取图像、口味等的列表。

下面是我要执行的代码

    from libcloud.compute.types import Provider
from libcloud.compute.providers import get_driver

# Authentication information so you can authenticate to DreamCompute
# copy the details from the OpenStack RC file
# https://dashboard.dreamcompute.com/project/access_and_security/api_access/openrc/

auth_username = 'admin'
auth_password = 'f882e2f4eaad434c'
TENANT_NAME = 'admin'
project_name = 'admin'
auth_url = 'http://192.168.56.101:5000/v3/tokens'
region_name = 'RegionOne'

provider = get_driver(Provider.OPENSTACK)
conn = provider(auth_username,
                auth_password,
                ex_force_auth_url=auth_url,
                ex_force_auth_version='2.0_password',
                ex_tenant_name=project_name,
                ex_force_service_type='compute',
                ex_force_service_name='compute',
                ex_force_base_url='http://192.168.56.101:8774/v2.1/29a8949bc3a04bfead0654be8e552017')


# Get the image that we want to use by its id
# NOTE: the image_id may change. See the documentation to find
# all the images available to your user
image_id = '4525d442-e9f4-4d19-889f-49ab03be93df'  
image = conn.get_image(image_id)

# Get the flavor that we want to use by its id
flavor_id = '100'
flavor = conn.ex_get_size(flavor_id)

# Create the node with the name “PracticeInstance”
# and the size and image we chose above
instance = conn.create_node(name='PracticeInstance', image=image, size=flavor)

当我运行上述代码时，出现以下错误：

C:\Python dev\website\music\openstack>python openstack.py
Traceback (most recent call last):
  File "openstack.py", line 30, in <module>
    image = conn.get_image(image_id)
  File "C:\Users\C5265680\AppData\Local\Programs\Python\Python36\lib\site-packages\libcloud\compute\drivers\openstack.py", line 2028, in get_image
    '/images/%s' % (image_id,)).object['image'])
  File "C:\Users\C5265680\AppData\Local\Programs\Python\Python36\lib\site-packages\libcloud\common\openstack.py", line 223, in request
    raw=raw)
  File "C:\Users\C5265680\AppData\Local\Programs\Python\Python36\lib\site-packages\libcloud\common\base.py", line 536, in request
    action = self.morph_action_hook(action)
  File "C:\Users\C5265680\AppData\Local\Programs\Python\Python36\lib\site-packages\libcloud\common\openstack.py", line 290, in morph_action_hook
    self._populate_hosts_and_request_paths()
  File "C:\Users\C5265680\AppData\Local\Programs\Python\Python36\lib\site-packages\libcloud\common\openstack.py", line 324, in _populate_hosts_and_request_paths
    osa = osa.authenticate(**kwargs)  # may throw InvalidCreds
  File "C:\Users\C5265680\AppData\Local\Programs\Python\Python36\lib\site-packages\libcloud\common\openstack_identity.py", line 855, in authenticate
    return self._authenticate_2_0_with_password()
  File "C:\Users\C5265680\AppData\Local\Programs\Python\Python36\lib\site-packages\libcloud\common\openstack_identity.py", line 880, in _authenticate_2_0_with_password
    return self._authenticate_2_0_with_body(reqbody)
  File "C:\Users\C5265680\AppData\Local\Programs\Python\Python36\lib\site-packages\libcloud\common\openstack_identity.py", line 885, in _authenticate_2_0_with_body
    method='POST')
  File "C:\Users\C5265680\AppData\Local\Programs\Python\Python36\lib\site-packages\libcloud\common\base.py", line 637, in request
    response = responseCls(**kwargs)
  File "C:\Users\C5265680\AppData\Local\Programs\Python\Python36\lib\site-packages\libcloud\common\base.py", line 157, in __init__
    message=self.parse_error())
libcloud.common.exceptions.BaseHTTPError: {"error": {"message": "The resource could not be found.", "code": 404, "title": "Not Found"}}

我检查了 /var/log/keystone 服务器中的日志，没有出现任何错误，所以我猜我可以登录了。

也有很多例子表明，在上述步骤之后我应该能够得到 images/flavors/servers.

的列表

不知道为什么我无法连接。有人可以帮我解决这个问题吗？

Answer 1

我认为您应该修改 auth_url 和提供者参数。由于以下参数集适用于我的环境。

auth_username = 'admin'
auth_password = 'f882e2f4eaad434c'
TENANT_NAME = 'admin'
project_name = 'admin'
auth_url = 'http://192.168.56.101:5000'
region_name = 'RegionOne'

provider = get_driver(Provider.OPENSTACK)
conn = provider(auth_username,
                auth_password,
                ex_force_auth_url=auth_url,
                ex_force_auth_version='2.0_password',
                ex_tenant_name=project_name)

2017.11.16 更新

@user8040338 你的错误信息是第一条线索， The resource could not be found. and status code 404, 其message和status code的大部分原因是错误的rest api url格式。

首先，您需要检查keystone v2.0 rest api format。同时，你再次检查Libcloud reference。例如，参数 ex_force_auth_version 已指定 api 版本 2.0_password (v2)，但 auth_url 变量形成 url 包括版本资源 /v3，您指定的 libcloud API 参数的 API 版本和用法错误。 auth_url 应该是来自 API 用法的基础 URL。

API每个参数的类似过程要反复进行，直到解决问题。

Openstack 无法连接到使用休息 api

Openstack Not able to connect to using rest api

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