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mongod shell 没有启动，data/db 不存在

本文介绍了mongod shell 没有启动，data/db 不存在的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

当我启动 mongod 时出现错误.有什么问题?

When I start mongod trowed error. What is the problem?

root@cs12867:~# mongod
mongod --help for help and startup options
Sun Dec 22 15:37:44.081 [initandlisten] MongoDB starting : pid=18415 port=27017 dbpath=/data/db/ 64-bit host=cs12867
Sun Dec 22 15:37:44.081 [initandlisten] db version v2.4.6
Sun Dec 22 15:37:44.081 [initandlisten] git version: b9925db5eac369d77a3a5f5d98a145eaaacd9673
Sun Dec 22 15:37:44.081 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49
Sun Dec 22 15:37:44.081 [initandlisten] allocator: tcmalloc
Sun Dec 22 15:37:44.081 [initandlisten] options: {}
Sun Dec 22 15:37:44.081 [initandlisten] exception in initAndListen: 10296
*********************************************************************
 ERROR: dbpath (/data/db/) does not exist.
 Create this directory or give existing directory in --dbpath.
 See http://dochub.mongodb.org/core/startingandstoppingmongo
*********************************************************************
, terminating
Sun Dec 22 15:37:44.081 dbexit:
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: going to close listening sockets...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: going to flush diaglog...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: going to close sockets...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: waiting for fs preallocator...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: lock for final commit...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: final commit...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: closing all files...
Sun Dec 22 15:37:44.081 [initandlisten] closeAllFiles() finished
Sun Dec 22 15:37:44.081 dbexit: really exiting now

我设置了--dbpath:

root@cs12867:~# mongod --dbpath /var/lib/mongodb/data/db
Sun Dec 22 15:29:25.121 [initandlisten] MongoDB starting : pid=17739 port=27017 dbpath=/var/lib/mongodb/data/db 64-bit host=cs12867
Sun Dec 22 15:29:25.121 [initandlisten] db version v2.4.6
Sun Dec 22 15:29:25.121 [initandlisten] git version: b9925db5eac369d77a3a5f5d98a145eaaacd9673
Sun Dec 22 15:29:25.121 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49
Sun Dec 22 15:29:25.121 [initandlisten] allocator: tcmalloc
Sun Dec 22 15:29:25.121 [initandlisten] options: { dbpath: "/var/lib/mongodb/data/db" }
Sun Dec 22 15:29:25.121 [initandlisten]
Sun Dec 22 15:29:25.121 [initandlisten] ** WARNING: Readahead for /var/lib/mongodb/data/db is set to 2048KB
Sun Dec 22 15:29:25.121 [initandlisten] **          We suggest setting it to 256KB (512 sectors) or less
Sun Dec 22 15:29:25.121 [initandlisten] **          http://dochub.mongodb.org/core/readahead
Sun Dec 22 15:29:25.123 [initandlisten] journal dir=/var/lib/mongodb/data/db/journal
Sun Dec 22 15:29:25.123 [initandlisten] recover : no journal files present, no recovery needed
Sun Dec 22 15:29:25.134 [initandlisten] waiting for connections on port 27017
Sun Dec 22 15:29:25.134 [websvr] admin web console waiting for connections on port 28017
Sun Dec 22 15:29:26.179 [initandlisten] connection accepted from 127.0.0.1:37164 #1 (1 connection now open)
Sun Dec 22 15:29:26.179 [FileAllocator] allocating new datafile /var/lib/mongodb/data/db/Tester.ns, filling with zeroes...
Sun Dec 22 15:29:26.179 [FileAllocator] creating directory /var/lib/mongodb/data/db/_tmp
Sun Dec 22 15:29:26.181 [FileAllocator] done allocating datafile /var/lib/mongodb/data/db/Tester.ns, size: 16MB,  took 0 secs
Sun Dec 22 15:29:26.181 [FileAllocator] allocating new datafile /var/lib/mongodb/data/db/Tester.0, filling with zeroes...
Sun Dec 22 15:29:26.181 [FileAllocator] done allocating datafile /var/lib/mongodb/data/db/Tester.0, size: 64MB,  took 0 secs
Sun Dec 22 15:29:26.182 [FileAllocator] allocating new datafile /var/lib/mongodb/data/db/Tester.1, filling with zeroes...
Sun Dec 22 15:29:26.182 [FileAllocator] done allocating datafile /var/lib/mongodb/data/db/Tester.1, size: 128MB,  took 0 secs
Sun Dec 22 15:29:26.184 [conn1] build index Tester.user { _id: 1 }
Sun Dec 22 15:29:26.184 [conn1] build index done.  scanned 0 total records. 0 secs
Sun Dec 22 15:29:26.184 [conn1] end connection 127.0.0.1:37164 (0 connections now open)
Sun Dec 22 15:29:26.192 [initandlisten] connection accepted from 127.0.0.1:37165 #2 (1 connection now open)
Sun Dec 22 15:29:26.732 [initandlisten] connection accepted from 127.0.0.1:37166 #3 (2 connections now open)
Sun Dec 22 15:29:26.733 [conn3] end connection 127.0.0.1:37166 (1 connection now open)
Sun Dec 22 15:29:26.740 [initandlisten] connection accepted from 127.0.0.1:37167 #4 (2 connections now open)
Sun Dec 22 15:29:26.740 [conn4] end connection 127.0.0.1:37167 (1 connection now open)
Sun Dec 22 15:29:26.834 [initandlisten] connection accepted from 127.0.0.1:37168 #5 (2 connections now open)
Sun Dec 22 15:29:26.835 [conn5] end connection 127.0.0.1:37168 (1 connection now open)
Sun Dec 22 15:29:26.843 [initandlisten] connection accepted from 127.0.0.1:37169 #6 (2 connections now open)
Sun Dec 22 15:29:27.252 [initandlisten] connection accepted from 127.0.0.1:37170 #7 (3 connections now open)
Sun Dec 22 15:29:27.253 [conn7] end connection 127.0.0.1:37170 (2 connections now open)
Sun Dec 22 15:29:27.304 [initandlisten] connection accepted from 127.0.0.1:37171 #8 (3 connections now open)
Sun Dec 22 15:29:27.304 [conn8] end connection 127.0.0.1:37171 (2 connections now open)
Sun Dec 22 15:29:28.332 [initandlisten] connection accepted from 127.0.0.1:37173 #9 (3 connections now open)
Sun Dec 22 15:29:28.333 [conn9] end connection 127.0.0.1:37173 (2 connections now open)
Sun Dec 22 15:29:28.352 [initandlisten] connection accepted from 127.0.0.1:37174 #10 (3 connections now open)
Sun Dec 22 15:29:28.842 [conn10] end connection 127.0.0.1:37174 (2 connections now open)
Sun Dec 22 15:29:28.862 [initandlisten] connection accepted from 127.0.0.1:37176 #11 (3 connections now open)
Sun Dec 22 15:29:28.863 [conn11] end connection 127.0.0.1:37176 (2 connections now open)
Sun Dec 22 15:29:30.362 [initandlisten] connection accepted from 127.0.0.1:37178 #12 (3 connections now open)
Sun Dec 22 15:29:30.363 [initandlisten] connection accepted from 127.0.0.1:37179 #13 (4 connections now open)
Sun Dec 22 15:29:30.364 [conn13] end connection 127.0.0.1:37179 (3 connections now open)
Sun Dec 22 15:37:36.523 [signalProcessingThread] shutdown: closing all files...
Sun Dec 22 15:37:36.523 [signalProcessingThread] closeAllFiles() finished
Sun Dec 22 15:37:36.523 [signalProcessingThread] journalCleanup...
Sun Dec 22 15:37:36.523 [signalProcessingThread] removeJournalFiles
Sun Dec 22 15:37:36.525 [signalProcessingThread] shutdown: removing fs lock...
Sun Dec 22 15:37:36.525 dbexit: really exiting now

再说一遍:

root@cs12867:~# mongod
mongod --help for help and startup options
Sun Dec 22 15:37:44.081 [initandlisten] MongoDB starting : pid=18415 port=27017 dbpath=/data/db/ 64-bit host=cs12867
Sun Dec 22 15:37:44.081 [initandlisten] db version v2.4.6
Sun Dec 22 15:37:44.081 [initandlisten] git version: b9925db5eac369d77a3a5f5d98a145eaaacd9673
Sun Dec 22 15:37:44.081 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49
Sun Dec 22 15:37:44.081 [initandlisten] allocator: tcmalloc
Sun Dec 22 15:37:44.081 [initandlisten] options: {}
Sun Dec 22 15:37:44.081 [initandlisten] exception in initAndListen: 10296
*********************************************************************
 ERROR: dbpath (/data/db/) does not exist.
 Create this directory or give existing directory in --dbpath.
 See http://dochub.mongodb.org/core/startingandstoppingmongo
*********************************************************************
, terminating
Sun Dec 22 15:37:44.081 dbexit:
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: going to close listening sockets...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: going to flush diaglog...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: going to close sockets...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: waiting for fs preallocator...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: lock for final commit...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: final commit...
Sun Dec 22 15:37:44.081 [initandlisten] shutdown: closing all files...
Sun Dec 22 15:37:44.081 [initandlisten] closeAllFiles() finished
Sun Dec 22 15:37:44.081 dbexit: really exiting now

推荐答案

mongodb的默认db路径是/data/db/.

The default db path for mongodb is /data/db/.

所以当你运行时:

mongod

MongoDB 检查/data/db/是否存在以及用户是否可以访问它.在您的情况下，没有这样的目录，因此出现错误.

MongoDB checks if /data/db/ is present and if the user has access to it. In your case, there is no such directory and hence the error.

但是，您可以使用 mongod 的 --dbpath 参数覆盖默认的 db 路径(或使用配置文件).

However you can override the default db path using the --dbpath argument of mongod( or use a config file).

mongod --dbpath /var/lib/mongodb/data/db

在这种情况下，而不是检查/data/db/mongoDB 检查/var/lib/mongodb/data/db.在您的情况下，您拥有指定的目录并且您可以访问它，因此它会运行.

In this case instead of checking for /data/db/ mongoDB check for /var/lib/mongodb/data/db. In your case, you have the specified directory and you have access to it and hence it runs.

这样做并不会启动 mongo shell.要启动 shell，首先如上所述启动 mongod 并让它运行.然后在另一个终端执行

And doing this doesn't start the mongo shell. To start the shell, start mongod first as mentioned above and leave it running. Then in another terminal execute 

mongo

这将启动 mongo shell.

This will start the mongo shell.

这篇关于mongod shell 没有启动，data/db 不存在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！

08-03 17:41
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