对于相对较小的小型数据库，我最终使用了以下解决方案。它并不真正适用于大型数据库或复杂数据库，但足以满足我的情况。它将所有文档作为json转储到备份目录。它笨拙，但是除了pymongo之外，它不依赖其他任何东西。
from os.path import join
import pymongo
from bson.json_utils import dumps
def backup_db(backup_db_dir):
client = pymongo.MongoClient(host=<host>, port=<port>)
database = client[<db_name>]
authenticated = database.authenticate(<uname>,<pwd>)
assert authenticated, "Could not authenticate to database!"
collections = database.collection_names()
for i, collection_name in enumerate(collections):
col = getattr(database,collections[i])
collection = col.find()
jsonpath = collection_name + ".json"
jsonpath = join(backup_db_dir, jsonpath)
with open(jsonpath, 'wb') as jsonfile:
jsonfile.write(dumps(collection))
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