Centos7安装mongodb出现的问题：服务无法启动

Myth丶恋晨 2022-07-13 00:57 322阅读 0赞

### 问题描述： ###

Centos7安装mongodb刚开始安装成功时执行sudo service mongod start 能启动，执行sudo service mongod status显示Active: active (running)，但如果我重新启动系统，service又不能启动了。如果我卸载和再次安装，刚安装成功能启动服务，但在重新启动后，还是出现原来的状况，上代码：

[brody@localhost Desktop]$ sudo systemctl status  mongod.service
    ● mongod.service - High-performance, schema-free document-oriented database
       Loaded: loaded (/usr/lib/systemd/system/mongod.service; enabled; vendor preset: disabled)
       Active: failed (Result: exit-code) since Sat 2016-12-17 21:35:08 CST; 3s ago
         Docs: https://docs.mongodb.org/manual
      Process: 1570 ExecStart=/usr/bin/mongod $OPTIONS run (code=exited, status=1/FAILURE) 
    Main PID: 1570 (code=exited, status=1/FAILURE)
    
    Dec 17 21:35:08 localhost.localdomain systemd[1]: Started High-performance, s...
    Dec 17 21:35:08 localhost.localdomain systemd[1]: Starting High-performance, ...
    Dec 17 21:35:08 localhost.localdomain mongod[1570]: about to fork child proce...
    Dec 17 21:35:08 localhost.localdomain mongod[1570]: forked process: 1591
    Dec 17 21:35:08 localhost.localdomain systemd[1]: mongod.service: main proces...
    Dec 17 21:35:08 localhost.localdomain systemd[1]: Unit mongod.service entered...
    Dec 17 21:35:08 localhost.localdomain systemd[1]: mongod.service failed.
    Hint: Some lines were ellipsized, use -l to show in full.

### 解决办法： ###

##### 1.编辑mongod.conf #####

sudo vim /etc/mongod.conf

把fork修改为 false ， pidFilePath修改为dbPath的路径，我这里在storage显示为dbPath: /var/lib/mongo，即设置为：  
fork: false \# fork and run in background  
pidFilePath: /var/lib/mongo/mongod.pid \# location of  
如下所是：

# Where and how to store data.
    storage:
      dbPath: /var/lib/mongo
      journal:
        enabled: true
    # engine:
    # mmapv1:
    # wiredTiger:
    # how the process runs
    processManagement:
      fork: false  # fork and run in background
      pidFilePath: /var/lib/mongo/mongod.pid  # location of pidfile

##### 2.设置firewall #####

sudo firewall-cmd --zone=public --permanent --add-port=27017/tcp; firewall-cmd --reload

##### 3.重启查看验证 #####

sudo tail -f /var/log/mongodb/mongod.log  & systemctl restart mongod; systemctl status mongod

##### 4.重启电脑 #####

参考文献：  
\[1\]Stack Overflow [http://stackoverflow.com/questions/40829306/mongodb-cant-start-centos-7][http_stackoverflow.com_questions_40829306_mongodb-cant-start-centos-7]  
\[2\]官方文档[https://docs.mongodb.com/manual/reference/configuration-options/\#storage.wiredTiger][https_docs.mongodb.com_manual_reference_configuration-options_storage.wiredTiger]

[http_stackoverflow.com_questions_40829306_mongodb-cant-start-centos-7]: http://stackoverflow.com/questions/40829306/mongodb-cant-start-centos-7
[https_docs.mongodb.com_manual_reference_configuration-options_storage.wiredTiger]: https://docs.mongodb.com/manual/reference/configuration-options/#storage.wiredTiger