为什么我可以在pymongo上连接AWSdocumentDB而不使用“rdscombinedcabundle.pem”

Question

美国焊接学会如下图所示

##To encrypt data in transit, download the public key for Amazon DocumentDB named rds-combined-ca-bundle.pem

import pymongo

##Create a MongoDB client, open a connection to Amazon DocumentDB as a replica set and specify the read preference as secondary preferred
client = pymongo.MongoClient('mongodb://<sample-user>:<password>@sample-cluster.node.us-east-1.docdb.amazonaws.com:27017/?ssl=true&ssl_ca_certs=rds-combined-ca-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false') 

但我可以连接aws documentdb，而不必在pymongo上使用“rds组合ca bundle.pem”

import ssl
from pymongo import MongoClient

client = MongoClient(db_host, db_port, username=db_user, password=db_password, ssl=True, ssl_cert_reqs=ssl.CERT_NONE)

为什么不使用“rds组合ca bundle.pem”就可以连接

Answer 1

要获取最新的.pem文件，请使用以下链接：

https://docs.aws.amazon.com/documentdb/latest/developerguide/ca_cert_rotation.html

Answer 2

如果查看Mongo文档，当您指定ssl_cert_reqs=ssl.CERT_NONE时，您告诉PyMongo绕过证书验证，仍然允许连接到服务器。 https://api.mongodb.com/python/3.3.0/examples/tls.html

但是，当您指定证书时，它将使用推荐的方法提供的证书执行服务器验证