MongoError：无法连接到服务器
当我键入node server.js它返回我这个错误
MongoError: failed to connect to server [localhost:27017] on first connect [MongoError: connect ECONNREFUSED 127.0.0.1:27017] at Pool.<anonymous> (/home/islam/workspace/project/node_modules/mongoose/node_modules/mongodb-core/lib/topologies/server.js:327:35) at emitOne (events.js:96:13) at Pool.emit (events.js:191:7) at Connection.<anonymous> (/home/islam/workspace/project/node_modules/mongoose/node_modules/mongodb-core/lib/connection/pool.js:274:12) at Object.onceWrapper (events.js:293:19) at emitTwo (events.js:106:13) at Connection.emit (events.js:194:7) at Socket.<anonymous> (/home/islam/workspace/project/node_modules/mongoose/node_modules/mongodb-core/lib/connection/connection.js:177:49) at Object.onceWrapper (events.js:293:19) at emitOne (events.js:96:13) at Socket.emit (events.js:191:7) at emitErrorNT (net.js:1283:8) at _combinedTickCallback (internal/process/next_tick.js:80:11) at process._tickCallback (internal/process/next_tick.js:104:9)
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当我input命令行mongod它返回我这个
2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] MongoDB starting : pid=24805 port=27017 dbpath=/data/db 64-bit host=user 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] db version v3.4.4 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] git version: 888390515874a9debd1b6c5d36559ca86b44babd 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.2g 1 Mar 2016 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] allocator: tcmalloc 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] modules: none 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] build environment: 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] distmod: ubuntu1604 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] distarch: x86_64 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] target_arch: x86_64 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] options: {} 2017-05-05T23:33:06.816+0600 I STORAGE [initandlisten] exception in initAndListen: 29 Data directory /data/db not found., terminating 2017-05-05T23:33:06.816+0600 I NETWORK [initandlisten] shutdown: going to close listening sockets... 2017-05-05T23:33:06.816+0600 I NETWORK [initandlisten] shutdown: going to flush diaglog... 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] now exiting 2017-05-05T23:33:06.816+0600 I CONTROL [initandlisten] shutting down with code:100
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然而， mongo命令给我这个错误
MongoDB shell version v3.4.4 connecting to: mongodb://127.0.0.1:27017 2017-05-05T23:34:21.724+0600 W NETWORK [thread1] Failed to connect to 127.0.0.1:27017, in(checking socket for error after poll), reason: Connection refused 2017-05-05T23:34:21.724+0600 E QUERY [thread1] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed : connect@src/mongo/shell/mongo.js:237:13 @(connect):1:6 exception: connect failed
我需要访问我的数据库集合，
任何帮助将不胜感激！
Mongo默认将数据写入/ data文件夹，运行mongo服务的用户无权创build/ data文件夹。
您可以从此日志片段中获取此信息
2017-05-05T23:33:06.816+0600 I STORAGE [initandlisten] exception in initAndListen: 29 Data directory /data/db not found., terminating 2017-05-05T23:33:06.816+0600 I NETWORK [initandlisten] shutdown: going to close listening sockets...
所以，你需要这样做
sudo mkdir /data/db sudo chown $USER -R /data/db # give permission to the user who is running mongo service
看起来你需要创build/ data / db文件夹
尝试在terminal上做这个
sudo mkdir /data/db
然后启动mongodb
首先运行mongod.exe如果它给出了关于不安全closures的任何警告，则度量，诊断将忽略它们并在另一个 CLI（命令行界面）中运行mongo.exe 。
即使如果它不起作用，只需备份../data/db目录并重做数据库。
在使用数据库驱动程序（例如：mongoose，mongojs）访问数据库之前，请确保数据库已启动并正在运行。
$ mongo
MongoDB shell版本v3.4.4
连接到：mongodb：//127.0.0.1：27017
MongoDB服务器版本：3.4.4
使用YourAwesomeDatabaseName
切换到数据库YourAwesomeDatabaseName
你已准备好出发！