通过python3连接MongoDB报错如下：
File "/usr/local/lib64/python3.6/site-packages/pymongo-4.0.1-py3.6-linux-x86_64.egg/pymongo/network.py", line 160, in command
parse_write_concern_error=parse_write_concern_error)
File "/usr/local/lib64/python3.6/site-packages/pymongo-4.0.1-py3.6-linux-x86_64.egg/pymongo/helpers.py", line 170, in _check_command_response
raise OperationFailure(errmsg, code, response, max_wire_version)
pymongo.errors.OperationFailure: Authentication failed., full error: {'ok': 0.0, 'errmsg': 'Authentication failed.', 'code': 18, 'codeName':'AuthenticationFailed', '$clusterTime': {'clusterTime': Timestamp(1645694166, 1), 'signature': {'hash': b'\xe4\xe7L61\n\xba\xcf\xb3\xa4\xf9\xf9\x15\xcb\x93\xd0\x1f\xc7\xabV', 'keyId': 7054374532596891652}}, 'operationTime': Timestamp(1645694166, 1)}
python的连接URI：
uri = "mongodb://gaoyu:Password110@10.150.57.13:37071,10.150.57.13:37072,10.150.57.13:37073"
查看用户gaoyu，只有数据库gaoyu的权限
replicas:PRIMARY> show users
{
"_id" : "gaoyu.gaoyu",
"userId" : UUID("aa47e33f-ebac-48f3-96ee-23dea96373a1"),
"user" : "gaoyu",
"db" : "gaoyu",
"roles" : [
{
"role" : "readWrite",
"db" : "gaoyu"
}
],
"mechanisms" : [
"SCRAM-SHA-1",
"SCRAM-SHA-256"
]
}
指定数据库即可
uri = "mongodb://gaoyu:Gaoyu029@10.150.57.13:37071,10.150.57.13:37072,10.150.57.13:37073/gaoyu"