在Docker中无法用pymongo客户端连接MongoDB和Flask

Question

version: '3.4'

services:
  docker_flask_mongo:
    build: .
    ports:
      - '5000:5000'

  mongodb:
    image: mongo:3.4
    ports:
      - '27017:27017'

client = MongoClient(os.environ['DB_PORT_27017_TCP_ADDR'],
            27017)

完整代码：

import os
from flask import Flask, redirect, url_for, request, render_template
from pymongo import MongoClient

client = MongoClient(os.environ['DB_PORT_27017_TCP_ADDR'],
            27017)
db = client.tododb

app = Flask(__name__)

@app.route('/')
def test_code():
    item_doc = {
        'name': "a" ,
        'description': "b"
    }
    db.tododb.insert_one(item_doc)

    return "done"

if __name__ == "__main__":
    app.run(host='0.0.0.0', debug=True)

完整日志：

附加到dockerfolder_mongodb_1,dockerfolder_docker_flask_mongo_1 mongodb_1 2018-08-27t13:14:18.349+0000 I控件[initandlisten]MongoDB开始:pid=1 port=27017 dbpath=/data/db 64位主机=E086871a3aeb mongodb_1 2018-08-27t13:14:18.349+0000 I控件[initandlisten]db version v3.4.14 mongodb_1 2018-08-27t13:14:18.350+0000 I控件mongodb_1 2018-08-27T13:14:18.350+0000 I CONTROL[initandlisten]OpenSSL版本：OpenSSL 1.0.1t 2016年5月3日mongodb_1 2018-08-27t13:14:18.350+0000 I CONTROL[initandlisten]分配器：tcmalloc mongodb_1 2018-08-27T13:14:18.350+0000 I CONTROL[initandlisten]模块：none mongodb_1 2018-08-27T13:14:18.350+0000 I CONTROL[initandlisten]构建环境：mongodb_1 2018-08-27T13:14:18.350+0000 I CONTROL[initandlisten]distmod:debian81 mongodb_1 2018-08-27t13:14:18.350+0000 I CONTROL[initandlisten]distary:x86_64 mongodb_1 2018-08-27t13:14:18.350+0000 I控件[initandlisten]target_arch:x86_64 mongodb_1 2018-08-27t13:14:18.350+0000 I控件[initandlisten]选项：{}mongodb_1 2018-08-27t13:14:18.358+0000 I存储[initandlisten]mongodb_1 2018-08-27t13:14:18.358+0000 I存储[initandlisten]**警告：强烈建议使用XFS文件系统使用WiredTiger存储引擎mongodb_1
2018-08-27t13:14:18.358+0000 I存储[initandlisten]**
参见http://dochub.mongodb.org/core/prodnotes-filesystem mongodb_1
2018-08-27t13:14:18.359 data/db/journal boost：：filesystem：：create_directory：设备上没有剩余空间：“/data/db/journal”mongodb_1 2018-08-27t13:14:18.359+0000 I STORAGE[initandlisten]initandlisten std：：exception：boost：：filesystem：：create_directory：设备上没有剩余空间：“/data/db/journal”，终止mongodb_1
2018-08-27t13:14:18.359+0000 I NETWORKmongodb_1 2018-08-27t13:14:18.359+0000 I NETWORK[initandlisten]删除套接字文件：/tmp/mongodb-27017.sock mongodb_1 2018-08-27t13:14:18.359+0000 I NETWORK[initandlisten]关闭：要刷新diaglog...mongodb_1 2018-08-27t13:14:18.360+0000 I控件[initandlisten]现在退出mongodb_1 2018-08-27t13:14:18.360+0000 I控件[initandlisten]关闭，代码:100docker_flask_mongo_1*服务Flask应用程序“app”（惰性加载）docker_flask_mongo_1*环境：生产docker_flask_mongo_1警告：不要在生产环境中使用开发服务器。docker_flask_mongo_1使用生产WSGI服务器。docker_flask_mongo_1*调试模式：在docker_flask_mongo_1*在http://0.0.0.0:5000/上运行（按Ctrl+C退出）docker_flask_mongo_1*使用stat重新启动dockerfolder_mongo_1退出代码100 docker_flask_mongo_1*调试器处于活动状态！docker_flask_mongo_1*调试器引脚:470-553-089

当我转到localhost:5000时，我会得到以下错误

pymongo.errors.ServerSelectionTimeoutError
pymongo.errors.ServerSelectionTimeoutError: mongodb:27017: [Errno -2] Name or service not known

Answer 1

所以解决办法是这样的，

我的机器中的Docker卷从以前的东西中已经满了。所以我使用Docker卷剪枝删除了它

之后在烧瓶代码中，

client = MongoClient('mongodb://mongodb:27017/')