Mongodb取回所有数据库

Question

昨天我把Ubuntu14.10升级到15.04。但这让我停止了工作。我在研究chicagoboss和mongodb。我看到mongodb崩溃了。通过输入内容，mongo得到了以下错误：

$ 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.lock文件。然后试着用

$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
*********************************************************************

我注意到，在我的mongodb.conf文件中，dbpath是/var/lib/mongodb。这是正确的，在找到所有mongodb databases.So时，我尝试将dbpath设置到相同的位置，但得到了错误：

$ 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

我该如何解决这个问题。我想要回我所有的数据库。

此外，我还检查了service start的以下错误

$ 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，您可以将mongodb作为服务启动，它可能会将其标识从根更改为"mongo“或类似的东西。在类似debian的系统上，mongodb的配置是在/etc/init/mongodb.conf中，最好是在/etc/mongodb.conf中。见http://packages.ubuntu.com/utopic/amd64/mongodb-server/filelist。在那里你可以change the database path。

顺便检查一下数据目录的权限。用户“mongo”-或者任何东西-应该有写入访问权限：

$ ls -l /var/lib/mongodb