Question

我在django虚拟环境（python）中运行virtualenv。 django网站由来自亚马逊ec2实例（ubuntu 16.04）的apache2提供。我使用boto3模块写入amazon s3。

我安装了awscli并运行了aws configure并正确设置了我的aws访问密钥。 （我知道我正确配置了它，因为$ aws s3 ls会返回我的s3存储桶的正确列表。）

但是，当我尝试从django应用程序向s3写入一些对象时，它无法产生标题中描述的错误。

我最近搬到了一个新实例并开始使用python虚拟环境。在那之前，它曾经工作得很好。我已经阅读了关于SO和来自aws的文档的问题。下面是堆栈跟踪。

Environment:


Request Method: POST
Request URL: http://*******/product/4

Django Version: 1.10.6
Python Version: 3.5.2
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'abc.apps.abcdirectConfig')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware')



Traceback:

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/django/core/handlers/exception.py" in inner
  42.             response = get_response(request)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/django/core/handlers/base.py" in _legacy_get_response
  249.             response = self._get_response(request)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
  23.                 return view_func(request, *args, **kwargs)

File "/home/ubuntu/abcdirect/abcdirect/views.py" in view_product
  385.             s3.Bucket('abccms').put_object(Key=s3_file_name, Body=s3_file_data)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/boto3/resources/factory.py" in do_action
  520.                 response = action(self, *args, **kwargs)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/boto3/resources/action.py" in __call__
  83.         response = getattr(parent.meta.client, operation_name)(**params)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/botocore/client.py" in _api_call
  253.             return self._make_api_call(operation_name, kwargs)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/botocore/client.py" in _make_api_call
  530.                 operation_model, request_dict)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/botocore/endpoint.py" in make_request
  141.         return self._send_request(request_dict, operation_model)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/botocore/endpoint.py" in _send_request
  166.         request = self.create_request(request_dict, operation_model)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/botocore/endpoint.py" in create_request
  150.                                      operation_name=operation_model.name)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/botocore/hooks.py" in emit
  227.         return self._emit(event_name, kwargs)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/botocore/hooks.py" in _emit
  210.             response = handler(**kwargs)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/botocore/signers.py" in handler
  90.         return self.sign(operation_name, request)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/botocore/signers.py" in sign
  147.             auth.add_auth(request)

File "/home/ubuntu/.virtualenv/lib/python3.5/site-packages/botocore/auth.py" in add_auth
  679.             raise NoCredentialsError

Exception Type: NoCredentialsError at /product/4
Exception Value: Unable to locate credentials

Answer 1

我想出了我收到错误的原因。我发布答案以防其他人遇到此问题。

tl; dr：aws配置文件不在apache的主目录中

django应用程序在用户www-data（apache2）下运行。当我使用aws configure配置凭据时，我的设置存储在.aws/config文件中。

现在这就是问题所在。

.aws/configure文件存储在 my 主目录中，而不是 www-data （apache2）的主目录中，{{1} } 默认情况下。因此，当django应用程序调用boto3模块时，模块正在/var/www中查找配置文件，但我的文件位于/var/www/.aws/config。

只需将相关文件复制到/home/ubuntu/.aws/config即可解决问题。

NoCredentialsError：无法找到凭据 - python模块boto3

1 个答案:

现在这就是问题所在。