javascript - 蒙哥错误: failed to connect to server [localhost:27017]

Question

当我输入 node server.js 时，它会返回这个错误

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)

**

当我在命令行中输入 mongod 时，它返回给我

    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

**

但是 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!

Answer 1

Mongo 默认将数据写入/data 文件夹，运行mongo 服务的用户没有创建/data 文件夹的权限。

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