尝试启动pymongo中的副本集时出现身份验证错误

Question

Trying to initiate a mongodb replica set from a python script, and running into an error with authentication.

from pymongo import MongoClient

ip = 'zzz.zz.zzz.zz'
port = 27017
replica_set = 'yomama'

config = {
  '_id': replica_set,
  'members': [
    {'host': 'xxx.xx.xxx.xx',
     '_id': 0,
     'arbiterOnly': False},
    {'host': 'yyy.yy.yyy.yy',
     '_id': 1,
     'arbiterOnly': False},
    {'host': 'zzz.zz.zzz.zz',
     '_id': 2,
     'arbiterOnly': False},
  ],
}

connection = MongoClient(ip, port)
connection.admin.command('replSetInitiate', config)

Running this script results in:

pymongo.errors.OperationFailure: command SON([('replSetInitiate', {'_id': 'yomama', 'members': [{'host': 'xxx.xx.xxx.xx', '_id': 0, 'arbiterOnly': False}, {'host': 'yyy.yy.yyy.yy', '_id': 1, 'arbiterOnly': False}, {'host': 'zzz.zz.zzz.zz', '_id': 2, 'arbiterOnly': False}]})])
failed: unauthorized

There is no authentication set up on the database, and running the same thing from a mongo shell works fine:

db.runCommand({replSetInitiate:{'_id': 'yomama', 'members': [{'host': 'xxx.xx.xxx.xx', '_id': 0, 'arbiterOnly': false}, {'host': 'yyy.yy.yyy.yy', '_id': 1, 'arbiterOnly': false}, {'host': 'zzz.zz.zzz.zz', '_id': 2, 'arbiterOnly': false}]}})
{
    "info" : "Config now saved locally.  Should come online in about a minute.",
    "ok" : 1
}

Any thoughts on why this error when doing the same thing with pymongo?

Answer 1

Figured it out. This was happening because by specifying the ip and port while initializing MongoClient ( connection = MongoClient(ip, port) ), the client did not bypass authentication using the localhost exception . Initializing using localhost does the trick, eg connection = MongoClient() .