尝试在 google 云中查找已部署的 python 函数的当前项目 ID 会出错

Question

我已经在 google 云中部署了一个 python 3.7 函数。我需要通过代码获取project-id，才能知道部署在什么地方。

我写了一个小的python 3.7脚本，通过google shell命令行测试

import urllib
import urllib.request
url="http://metadata.google.internal/computeMetadata/v1/project/project-id"
x=urllib.request.urlopen(url)
with x as response:
 x.read()

不幸的是，这只给我 b'' 作为回应。虽然我已经使用

设置了它，但我没有得到项目 ID

gcloud config set project my-project

谁能帮忙，因为我是 google 云和 python 的新手？谢谢。

下面是一个附加问题： 问题 2：

在我的本地系统中，我已经安装了 gcloud，如果我运行从那里 python3.7 脚本

x=urllib.request.urlopen(url) #this line

我从上面的行中得到这个异常：

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/urllib/request.py", line 1350, in do_open
    h.request(req.get_method(), req.selector, req.data, headers,
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 1240, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 1286, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 1235, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 1006, in _send_output
    self.send(msg)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 946, in send
    self.connect()
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 917, in connect
    self.sock = self._create_connection(
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/socket.py", line 787, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/socket.py", line 918, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 8] nodename nor servname provided, or not known

The below changes as suggested by the answer also gives me empty string

Answer 1

在 Python 3.7 运行时，you can get the project ID via an environment variable:

import os
project_id = os.environ['GCP_PROJECT']

在未来的运行时，this environment variable will be unavailable，您需要从元数据服务器获取项目 ID：

import urllib.request
url = "http://metadata.google.internal/computeMetadata/v1/project/project-id"
req = urllib.request.Request(url)
req.add_header("Metadata-Flavor", "Google")
project_id = urllib.request.urlopen(req).read().decode()

运行这在本地会产生错误，因为您的本地计算机无法解析 http://metadata.google.internal URL -- 这仅适用于已部署的函数。

Answer 2

在 Cloud Shell 中，DEVSHELL_PROJECT_ID 环境变量包含您的项目 ID。

所以您可以运行以下命令来获取您的项目 ID Python。

import os
USER = os.getenv('DEVSHELL_PROJECT_ID')
print(USER)

如果您想在 Cloud Functions 中获取您的项目 ID，您可以从包含 project_id:

的服务帐户 credentials.json 中获取它

# If this is running in a cloud function, then GCP_PROJECT should be defined
if 'GCP_PROJECT' in os.environ:
    project_id = os.environ['GCP_PROJECT']
    
# else if this is running locally then GOOGLE_APPLICATION_CREDENTIALS should be defined
elif 'GOOGLE_APPLICATION_CREDENTIALS' in os.environ:
    with open(os.environ['GOOGLE_APPLICATION_CREDENTIALS'], 'r') as fp:
        credentials = json.load(fp)
    project_id = credentials['project_id']
else:
    raise Exception('Failed to determine project_id')

尝试在 google 云中查找已部署的 python 函数的当前项目 ID 会出错

trying to find the current project id of the deployed python function in google cloud gives error

python

python-requests

google-api-python-client

google-cloud-python