mongodb - Mongodb取回所有数据库

Question

昨天我已经将Ubuntu 14.10升级到15.04。但这导致我停止工作。我当时正在研究芝加哥娃娃和mongodb。我看到mongodb崩溃的错误。
通过仅输入mongo得到以下错误:

$ mongo
MongoDB shell version: 2.4.10
connecting to: test
Mon May 11 11:26:32.985 Error: couldn't connect to server 127.0.0.1:27017 at src/mongo/shell/mongo.js:145
exception: connect failed

跟随stackoverflow query并删除了.lock文件。然后试图修复使用

$sudo mongod --repair 

然后得到一个错误:

*********************************************************************
 ERROR: dbpath (/data/db/) does not exist.
 Create this directory or give existing directory in --dbpath.
 See http://dochub.mongodb.org/core/startingandstoppingmongo
*********************************************************************

我观察到在mongodb.conf文件中，dbpath是/var/lib/mongodb。找到所有mongodb数据库的位置是正确的，因此我尝试将dbpath设置为相同的位置，但出现错误:

$ mongod --dbpath "/var/lib/mongodb"
Mon May 11 11:33:18.607 [initandlisten] MongoDB starting : pid=4450 port=27017 dbpath=/var/lib/mongodb 64-bit host=laxmikant-alphonso
Mon May 11 11:33:18.607 [initandlisten] db version v2.4.10
Mon May 11 11:33:18.607 [initandlisten] git version: e3d78955d181e475345ebd60053a4738a4c5268a
Mon May 11 11:33:18.607 [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
Mon May 11 11:33:18.607 [initandlisten] allocator: tcmalloc
Mon May 11 11:33:18.607 [initandlisten] options: { dbpath: "/var/lib/mongodb" }
Mon May 11 11:33:18.607 [initandlisten] exception in initAndListen: 10309 Unable to create/open lock file: /var/lib/mongodb/mongod.lock errno:13 Permission denied Is a mongod instance already running?, terminating
Mon May 11 11:33:18.607 dbexit: 
Mon May 11 11:33:18.607 [initandlisten] shutdown: going to close listening sockets...
Mon May 11 11:33:18.607 [initandlisten] shutdown: going to flush diaglog...
Mon May 11 11:33:18.607 [initandlisten] shutdown: going to close sockets...
Mon May 11 11:33:18.607 [initandlisten] shutdown: waiting for fs preallocator...
Mon May 11 11:33:18.607 [initandlisten] shutdown: lock for final commit...
Mon May 11 11:33:18.607 [initandlisten] shutdown: final commit...
Mon May 11 11:33:18.607 [initandlisten] shutdown: closing all files...
Mon May 11 11:33:18.608 [initandlisten] closeAllFiles() finished
Mon May 11 11:33:18.608 [initandlisten] shutdown: removing fs lock...
Mon May 11 11:33:18.608 [initandlisten] couldn't remove fs lock errno:9 Bad file descriptor
Mon May 11 11:33:18.608 dbexit: really exiting now

我该如何解决此问题。我想要我的所有数据库。

我还检查了service start的错误信息:

$ sudo service mongodb start
Failed to start mongodb.service: Unit mongodb.service failed to load: No such file or directory.

Answer 1

$ mongod --dbpath "/var/lib/mongodb"

在这种情况下，您可以自己启动mongodb。而且您可能没有数据目录的R / W权限。

$ sudo service mongodb start

现在，您将mongodb作为服务启动，它可能会将其身份从root更改为“mongo”或类似的名称。在类似debian的系统上，mongodb的配置在/etc/init/mongodb.conf中，最好在/etc/mongodb.conf中。参见http://packages.ubuntu.com/utopic/amd64/mongodb-server/filelist。在那里，您可以change the database path。

顺便说一句，检查您的数据目录的权限。用户“mongo”(或任何用户)应在此处具有写访问权:

$ ls -l /var/lib/mongodb