猫鼬连接到副本集 [英] Mongoose connection to replica set

问题描述

我试图通过猫鼬连接到MongoDB copySet.我使用了链接.
配置json:

I tried to connect to MongoDB replicaSet via mongoose. I used this link.
Configuration json:

"mongoose": {
   "uri": "mongodb://localhost:27022/chat,localhost:27021,localhost:27020",
   "options": {
       "replset": { "rs_name": "rs0" },
       "server": {
           "poolSize": 3,
           "socketOptions": {
               "keepAlive": 1
           }
       }
    }
}

猫鼬连接:

var mongoose = require('mongoose');
mongoose.connect(config.get('mongoose:uri'), config.get('mongoose:options'));

启动应用程序后出现异常:

And after launching application i got exception:

Error: host must be specified [undefined]
at new exports.ConnectionPool (c:\Users\lor1an\Downloads\prj_chat-master\prj_chat-master\node_modules\mongodb\lib\mongodb\connection\connection_pool.js:18:11)
at Server.connect (c:\Users\lor1an\Downloads\prj_chat-master\prj_chat-master\node_modules\mongodb\lib\mongodb\connection\server.js:335:25)
at Db.open (c:\Users\lor1an\Downloads\prj_chat-master\prj_chat-master\node_modules\mongodb\lib\mongodb\db.js:264:23)
at MongoStore._open_database (c:\Users\lor1an\Downloads\prj_chat-master\prj_chat-master\node_modules\connect-mongo\lib\connect-mongo.js:174:15)
at MongoStore._get_collection (c:\Users\lor1an\Downloads\prj_chat-master\prj_chat-master\node_modules\connect-mongo\lib\connect-mongo.js:169:14)
at MongoStore.get (c:\Users\lor1an\Downloads\prj_chat-master\prj_chat-master\node_modules\connect-mongo\lib\connect-mongo.js:213:10)
at Object.session [as handle] (c:\Users\lor1an\Downloads\prj_chat-master\prj_chat-master\node_modules\connect\node_modules\express-session\index.js:215:11)
at next (c:\Users\lor1an\Downloads\prj_chat-master\prj_chat-master\node_modules\connect\lib\proto.js:194:15)
at Object.module.exports [as handle] (c:\Users\lor1an\Downloads\prj_chat-master\prj_chat-master\middleware\resExtensions.js:21:2)
at next (c:\Users\lor1an\Downloads\prj_chat-master\prj_chat-master\node_modules\connect\lib\proto.js:194:15)

Db:聊天，主服务器:localhost:27022.

Db: chat, primary server: localhost:27022.

我也尝试删除其他两台服务器(仅在配置json中保留主服务器)，并且我看到它知道有关辅助服务器的信息(我使用了日志).我认为这与mongodb元数据有关.但是，当我关闭主服务器时，它就完成了工作(难怪)，我需要它，以便可以使用辅助服务器.
有什么想法吗?

Also I tried remove two other servers (keeping only the primary one in config json) and I saw that it knows about the secondary servers (I used log). I think it's about mongodb meta-data. But when I shutdown primary one, it finished its work (no wonder), I need it so it can use the secondary one instead.
Any ideas?

推荐答案

我们使用这个:

if(config.db.indexOf('replicaSet') > - 1) {
  dbOptions = {
    db: {native_parser: true},
    replset: {
      auto_reconnect:false,
      poolSize: 10,
      socketOptions: {
        keepAlive: 1000,
        connectTimeoutMS: 30000
      }
    },
    server: {
      poolSize: 5,
      socketOptions: {
        keepAlive: 1000,
        connectTimeoutMS: 30000
      }
    }
  };
}

var db = mongoose.connect(config.db, dbOptions);

其中

config.db =  'mongodb://USER:PW@host1:port1,host2:port2/DBNAME?replicaSet=RSNAME'

根据关闭自动重新连接https://team.goodeggs.com/reconnecting-to-mongodb-when-mongoose-connect-fails-at-startup-83ca8496ca02

这篇关于猫鼬连接到副本集的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！