升級mongo遇到的坑

1. 升級後遠程連接無效

   1. 修改/etc/mongd.conf配置文件，將bindIp註釋掉

   2. 重啓mongo服務，但遇到service mongod restart無效

      sudo /usr/bin/mongod --confif /etc/mongod.conf

       

    

2. 升級升級後Mongo出現Failed to restart mongod.service: Unit mongod.service failed to load: No such file or directory.

   failed to start lsb an object/document-oriented database

   mongodb.service: main process exited, code=exited, status=4/NOPERMISSION

   最終在google上找到答案：

   刪除以前的數據庫文件並重啓服務：

   removed journal and all DBs in /var/lib/mongodb/ then restart the service and it worked again.