无法在 ubuntu 上运行 Mongodb

Question

在尝试访问 mongodb 时，我收到连接失败的错误

1. 在运行mongod命令时我得到

   2019-02-25T11:05:05.870+0530 I CONTROL  [initandlisten] MongoDB 
   starting : pid=2580 port=27017 dbpath=/data/db 64-bit host=gten
   2019-02-25T11:05:05.870+0530 I CONTROL  [initandlisten] db version 
   v3.6.3
   2019-02-25T11:05:05.870+0530 I CONTROL  [initandlisten] git 
   version: 9586e557d54ef70f9ca4b43c26892cd55257e1a5
   2019-02-25T11:05:05.870+0530 I CONTROL  [initandlisten] OpenSSL 
   version: OpenSSL 1.1.0g  2 Nov 2017
   2019-02-25T11:05:05.870+0530 I CONTROL  [initandlisten] allocator: 
   tcmalloc
   2019-02-25T11:05:05.870+0530 I CONTROL  [initandlisten] modules: 
   none
   2019-02-25T11:05:05.870+0530 I CONTROL  [initandlisten] build 
   environment:
   2019-02-25T11:05:05.871+0530 I CONTROL  [initandlisten]     
   distarch: x86_64
   2019-02-25T11:05:05.871+0530 I CONTROL  [initandlisten]     
   target_arch: x86_64
   2019-02-25T11:05:05.871+0530 I CONTROL  [initandlisten] options: 
   {}
   2019-02-25T11:05:05.962+0530 I STORAGE  [initandlisten] exception 
   in initAndListen: IllegalOperation: Attempted to create a lock 
   file on a read-only directory: /data/db, terminating
   2019-02-25T11:05:05.962+0530 I CONTROL  [initandlisten] now 
   exiting
   2019-02-25T11:05:05.962+0530 I CONTROL  [initandlisten] shutting 
   down with code:100
   

当我运行mongo命令时，我得到

MongoDB shell version v4.0.6
connecting to: mongodb://127.0.0.1:27017/?gssapiServiceName=mongodb
2019-02-25T11:16:44.802+0530 E QUERY    [js] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed: SocketException: Error connecting to 127.0.0.1:27017 :: caused by :: Connection refused :
connect@src/mongo/shell/mongo.js:343:13
@(connect):1:6
exception: connect failed

我不知道我在 [ https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/]和 [ https://www.howtoforge.com/tutorial/install- mongodb-on-ubuntu-16.04/] 安装 mongo。

配置：我使用的是 UBUNTU 18.04。感谢您的帮助

在做了很多事情之后，我得到了

2019-02-25T18:52:27.197+0530 I CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten] MongoDB starting : pid=27390 port=27017 dbpath=/data/db 64-bit host=gten
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten] db version v4.0.6
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten] git version: caa42a1f75a56c7643d0b68d3880444375ec42e3
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.1.0g  2 Nov 2017
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten] allocator: tcmalloc
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten] modules: none
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten] build environment:
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten]     distmod: ubuntu1804
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten]     distarch: x86_64
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten]     target_arch: x86_64
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten] options: {}
2019-02-25T18:52:27.200+0530 E STORAGE  [initandlisten] Failed to set up listener: SocketException: Address already in use
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten] now exiting
2019-02-25T18:52:27.200+0530 I CONTROL  [initandlisten] shutting down with code:48

Answer 1

如果您遇到此问题这意味着您正在尝试连接 mongo，而不会在本地运行服务器，这会导致此问题

某些系统在机器启动时不会自动运行 mongo 服务。所以你需要手动启动它。

每次启动机器或想要使用 mongo 时，运行此命令以运行服务

sudo service mongod start
// or 
sudo systemctl start mongod

运行sudo service mongod status并查看它返回的内容。如果它已停止，请运行sudo service mongod start以启动 mongodb 并尝试连接到它。

如果sudo service mongod start给出错误，那么

创建/lib/systemd/system/mongod.service包含以下内容的文件：

[Unit]
Description=High-performance, schema-free document-oriented database
After=network.target

[Service]
User=mongodb
ExecStart=/usr/bin/mongod --quiet --config /etc/mongod.conf

[Install]
WantedBy=multi-user.target

如果您仍然存在错误，请分享控制台错误。一开始，我们可能会更好地帮助您。