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Mongodb error:MongoDB loads but breaks, returning code=exited, status=14

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Created: 2020年11月12日星期四 下午4:37:05 Latest updated:2020年11月12日星期四 下午5:06:58 views(1906)

OS version：Ubuntu 18.04 *64

mongodb version：Mongodb server 4.2

 

Earlier i was storing all the mongodb data files in /var/lib/mongodb directory..and the dbpath entry in /etc/mongodb.conf was /var/lib/mongodb..

Now i want to change the data directory to /vol/db..so I created the directory /vol/db and changed the permissions using sudo chown -R id -u /vol/db and changed the db path entry to /vol/db in /etc/mongodb.conf

now when i start the mongodb using sudo service mongodb start..

So im trying to setup Mongodb on Ubuntu 18.04 but im running into trouble.

when running :

sudo systemctl status mongodb

I get the following:

sudo service mongod start
root@iZuf6hn15mpmrtypv9ltogZ:~# sudo systemctl status mongod
● mongod.service - MongoDB Database Server
   Loaded: loaded (/lib/systemd/system/mongod.service; enabled; vendor preset: e
   Active: failed (Result: exit-code) since Fri 2020-11-13 00:04:58 CST; 4s ago
     Docs: https://docs.mongodb.org/manual
  Process: 13548 ExecStart=/usr/bin/mongod --config /etc/mongod.conf (code=exite
 Main PID: 13548 (code=exited, status=14)

 

Step 1：run

/usr/bin/mongod --config /etc/mongod.conf

run ok

这个明显是权限的问题，你直接执行 mongod --config /etc/mongod.conf 没问题，不代表 sudo service mongod start 也没问题，两种执行方式权限是不一样的。

mongodb/这个目录的所有者必须是 mongodb，可以使用这个命令修复：

sudo chown -R mongodb:mongodb *
drwxr-xr-x 4 mongodb mongodb 4.0K Mar 20 10:55 mongodb

Step 2：

sudo service mongod start

你要用 sudo service mongod start 的方式启动，然后看那个日志文件。

Step 3： check what is the error by reading mongo log

you can immediately find the problem(including permission ones)

 

阅读/etc/mongod.conf 找到日志文件，就可以找到错误原因。

 

 

tail -50 /var/log/mongodb/mongodb.log

 

 

read mongodb log

i am getting this error in /var/log/mongodb/mongodb.log

2020-11-13T00:04:57.809+0800 I  STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=1024M,cache_overflow=(file_max=0M),session_max=33000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),statistics_log=(wait=0),verbose=[recovery_progress,checkpoint_progress],
2020-11-13T00:04:58.449+0800 E  STORAGE  [initandlisten] WiredTiger error (13) [1605197098:449448][13548:0x7f680fd56b00], connection: __posix_open_file, 712: /var/lib/mongodb/journal/WiredTigerLog.0000000103: handle-open: open: Permission denied Raw: [1605197098:449448][13548:0x7f680fd56b00], connection: __posix_open_file, 712: /var/lib/mongodb/journal/WiredTigerLog.0000000103: handle-open: open: Permission denied
2020-11-13T00:04:58.465+0800 E  STORAGE  [initandlisten] WiredTiger error (13) [1605197098:465052][13548:0x7f680fd56b00], connection: __posix_open_file, 712: /var/lib/mongodb/journal/WiredTigerLog.0000000103: handle-open: open: Permission denied Raw: [1605197098:465052][13548:0x7f680fd56b00], connection: __posix_open_file, 712: /var/lib/mongodb/journal/WiredTigerLog.0000000103: handle-open: open: Permission denied
2020-11-13T00:04:58.480+0800 E  STORAGE  [initandlisten] WiredTiger error (13) [1605197098:480058][13548:0x7f680fd56b00], connection: __posix_open_file, 712: /var/lib/mongodb/journal/WiredTigerLog.0000000103: handle-open: open: Permission denied Raw: [1605197098:480058][13548:0x7f680fd56b00], connection: __posix_open_file, 712: /var/lib/mongodb/journal/WiredTigerLog.0000000103: handle-open: open: Permission denied
2020-11-13T00:04:58.484+0800 W  STORAGE  [initandlisten] Failed to start up WiredTiger under any compatibility version.
2020-11-13T00:04:58.484+0800 F  STORAGE  [initandlisten] Reason: 13: Permission denied

Step 4：And now, as root, you can change the owner to mongodb user.

You need to make sure that /var/db/ is owned by mongodb.

sudo chown -R mongodb:mongodb /var/lib/mongodb/journal/WiredTigerLog.0000000103

 

Step 4：Restart and check the status of the service:

sudo service mongod restart
# sudo systemctl status mongod
● mongod.service - MongoDB Database Server
   Loaded: loaded (/lib/systemd/system/mongod.service; enabled; vendor preset: e
   Active: active (running) since Fri 2020-11-13 00:07:44 CST; 2s ago
     Docs: https://docs.mongodb.org/manual
 Main PID: 14122 (mongod)
    Tasks: 17 (limit: 4681)