django - Mongodb 服务器未启动

Question

我正在使用 Django frameowrk。我的客户端在 js 中，后端使用 mongodb。两天前，我停止并重新启动了 Apache2 服务器，网站运行正常。今天网站突然显示 500 Internel serve error。当我检查 error.log 文件时，它显示:

[.....] ConnectionError: Cannot connect to the database:
[.....] could not connect to localhost:27017: [Errno 111] Connection refused

因此，我尝试通过 python 测试与 mongodb 的连接，如下所示:

>>> from pymongo import Connection
>>> connection = Connection('localhost',27017)
 Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "/usr/local/lib/python2.6/dist-packages/pymongo/connection.py", line 381, in __init__
self.__find_node()
File "/usr/local/lib/python2.6/dist-packages/pymongo/connection.py", line 659, in __find_node
raise AutoReconnect(', '.join(errors))
pymongo.errors.AutoReconnect: could not connect to localhost:27017: [Errno 111] Connection refused

我还使用 $mongo 测试了连接，它显示:

MongoDB shell version: 2.4.9
connecting to: test
Mon Jan 20 15:22:53.729 Error: couldn't connect to server 127.0.0.1:27017 at    src/mongo/shell/mongo.js:145
exception: connect failed

我试着寻找这个问题的答案，我看到有人告诉我要删除 mongod.lock 文件并像这里一样重新启动 mongodb Pymongo keeps refusing the connection at 27017和 MongoDB won't start after server crash但这里写着:http://docs.mongodb.org/manual/tutorial/recover-data-following-unexpected-shutdown/ 在正常操作中，永远不要删除 mongod.lock 文件并启动 mongod。而是考虑使用上述方法之一来恢复数据库并删除锁定文件。在可怕的情况下，您可以删除锁定文件，并使用可能损坏的文件启动数据库，并尝试从数据库中恢复数据；然而，在这些情况下预测数据库的状态是不可能的。 我真的很困惑该怎么办？我是否应该删除 mongod.lock 文件？另外，我是否需要先启动mongodb服务器，然后再启动apache2服务器？ Mongodb 日志文件显示:

   tail -n -30 mongodb.log 

    ***** SERVER RESTARTED *****


   Mon Jan 20 15:10:19.740 [initandlisten] MongoDB starting : pid=8061 port=27017    dbpath=/var/lib/mongodb 64-bit host=hand
   Mon Jan 20 15:10:19.740 [initandlisten] db version v2.4.9
   Mon Jan 20 15:10:19.740 [initandlisten] git version:   xxxxx //gives the number
   Mon Jan 20 15:10:19.740 [initandlisten] build info:  xxxx 
   Mon Jan 20 15:10:19.740 [initandlisten] allocator: tcmalloc
   Mon Jan 20 15:10:19.740 [initandlisten] options: { config: "/etc/mongodb.conf", dbpath: "/var/lib/mongodb", logappend: "true", logpath: "/var/log/mongodb/mongodb.log" }
   Mon Jan 20 15:10:19.742 [initandlisten] journal dir=/var/lib/mongodb/journal
   Mon Jan 20 15:10:19.742 [initandlisten] recover : no journal files present, no recovery needed
   Mon Jan 20 15:10:19.742 [initandlisten] 
   Mon Jan 20 15:10:19.742 [initandlisten] ERROR: Insufficient free space for journal files
   Mon Jan 20 15:10:19.742 [initandlisten] Please make at least 3379MB available in /var/lib/mongodb/journal or use --smallfiles
   Mon Jan 20 15:10:19.742 [initandlisten] 
   Mon Jan 20 15:10:19.743 [initandlisten] exception in initAndListen: 15926 Insufficient free space for journals, terminating
   Mon Jan 20 15:10:19.743 dbexit: 
   Mon Jan 20 15:10:19.743 [initandlisten] shutdown: going to close listening sockets...
   Mon Jan 20 15:10:19.743 [initandlisten] shutdown: going to flush diaglog...
   Mon Jan 20 15:10:19.743 [initandlisten] shutdown: going to close sockets...
   Mon Jan 20 15:10:19.743 [initandlisten] shutdown: waiting for fs preallocator...
   Mon Jan 20 15:10:19.743 [initandlisten] shutdown: lock for final commit...
   Mon Jan 20 15:10:19.743 [initandlisten] shutdown: final commit...
   Mon Jan 20 15:10:19.743 [initandlisten] shutdown: closing all files...
   Mon Jan 20 15:10:19.743 [initandlisten] closeAllFiles() finished
   Mon Jan 20 15:10:19.743 [initandlisten] journalCleanup...
   Mon Jan 20 15:10:19.743 [initandlisten] removeJournalFiles
   Mon Jan 20 15:10:19.743 [initandlisten] shutdown: removing fs lock...
   Mon Jan 20 15:10:19.743 dbexit: really exiting now

如果我运行以下命令，它会显示:

   $ sudo service mongodb start
     Starting database: mongodb failed!

Answer 1

好吧，错误消息很清楚:您没有足够的可用磁盘空间:

ERROR: Insufficient free space for journal files
   Please make at least 3379MB available in 
                                   /var/lib/mongodb/journal or use --smallfiles
   exception in initAndListen: 15926 Insufficient free space for journals, terminating

通常，MongoDB 对磁盘空间相当贪婪。特别是，恢复和压缩使用相当多的磁盘，因为它复制它处理的数据文件。确保您总是有一些空闲的演出。