MongoClient 在 fork 之前打开。仅创建 MongoClient Flask

Question

我是运行 Flask，采用 uwsgi 线程模式，进程 4，还使用 pymongo flask_mongoengine，uwsgi 说 "MongoClient opened before fork. Create MongoClient only " 我尝试使用 connect=False 进行连接，但结果相同

lazy-apps = true 问题已解决，但 uwsgi 似乎需要更多时间来加载怎样才能获得最佳性能？

Answer 1

app.config['MONGODB_SETTINGS'] = {'DB': 'somedb', "USERNAME": "dbadmin", "PASSWORD":"somepass",'connect': False}

和

client = MongoClient(connect=False, username='dbadmin', password='somepass', authSource='somedb')

Mongoengine 和 pymongo 的解决方案

Answer 2

如果您使用 appllication factory pattern then setting MongoClient connection=False should fix it. It worked for my flask app (v1.0.2), running behind uwsgi server (v2.0.18).

例子

# __init__.py

from flask_mongoengine import MongoEngine

mongo = MongoEngine()

def create_app(config=None):
    app = Flask(__name__)

    app.config['MONGODB_HOST'] = 'localhost'
    app.config['MONGODB_PORT'] = 27017
    app.config['MONGODB_DB'] = 'datazzilla'

    # NOTE: This fixes "UserWarning: MongoClient opened before fork."
    # I'm not aware of side effects yet. Default value is/was "True"
    app.config['MONGODB_CONNECT'] = False

    mongo.init_app(app)

    return app

MongoClient 在 fork 之前打开。仅创建 MongoClient Flask

MongoClient opened before fork. Create MongoClient only Flask

flask

pymongo

uwsgi

flask-mongoengine

例子