Question

我在s3存储桶中保存了一个json文件，我正在使用在IAM用户cdeveloper下创建的lambda函数。

资源政策是：

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": {
                "AWS": "arn:aws:iam::355:user/cDeveloper"
            },
            "Action": "s3:*",
            "Resource": "arn:aws:s3:::ag-grid/*"
        }
    ]
}

当我进行测试时，我得到：

START RequestId: abb632556 Version: $LATEST
An error occurred (AccessDenied) when calling the PutObject operation: Access Denied: ClientError
Traceback (most recent call last):
  File "/var/task/lambda_function.py", line 24, in main
    run(event)
  File "/var/task/lambda_function.py", line 21, in run
    s3.Bucket('ag-grid').put_object(Key='assets/kpi.json', Body='kpi.json')
  File "/var/runtime/boto3/resources/factory.py", line 520, in do_action
    response = action(self, *args, **kwargs)
  File "/var/runtime/boto3/resources/action.py", line 83, in __call__
    response = getattr(parent.meta.client, operation_name)(**params)
  File "/var/runtime/botocore/client.py", line 314, in _api_call
    return self._make_api_call(operation_name, kwargs)
  File "/var/runtime/botocore/client.py", line 612, in _make_api_call
    raise error_class(parsed_response, operation_name)
botocore.exceptions.ClientError: An error occurred (AccessDenied) when calling the PutObject operation: Access Denied

这是我的功能：

r = requests.get('http://endpoint/', headers=headers).json() 

#save to temp folder
with open('kpi.json', 'w') as outfile:
    json.dump(r, outfile)
    s3 = boto3.resource('s3')
    s3.Bucket('ag-grid').put_object(Key='assets/kpi.json', Body='kpi.json')

我曾尝试过担任校长：*并且有效，但对所有人开放。

Answer 1

您需要创建IAM角色并将角色与Lambda函数相关联。

然后，要么：

为角色分配权限以访问S3存储桶，或
修改Bucket Policy以引用Role的ARN，而不是User ARN

最好将权限分配给角色，而不必为每个Lambda函数和Bucket修改存储桶策略。（即，删除存储桶策略，将等效权限放在角色中。）

s3桶不允许PutObject

1 个答案: