Link MongoDB Error: mongodb network is unreachable How to solve?

Question

Yesterday the link was still working, but today the link reported an error. I tried various methods on Baidu but it didn't work. The MongoDB service did not try to restart because it was a service that has been in use. Please help me solve it or give me some ideas. Thank you. MongoDB restricts IP. , so there is no AUTH.

伊谢尔伦 · Answer

First of all, for security reasons, it is recommended to turn on auth regardless of whether the IP is restricted or not. It is recommended to turn it on when appropriate.
"It worked fine yesterday" and "The link reported an error today" are actually not necessarily related, right? Even if it was fine yesterday, it doesn't prove that there won't be any problems today or in the future. So just focus on the current issues. Sorry for being a bit verbose, I am a bit obsessive about logical rigor:)
First check whether the process exists and whether the monitoring is normal:

ps aux | grep mongod
netstat -pln | grep mongod

Usually the situation should be that mongod has been terminated. Please check your log for the specific reason. By default located at:

/var/log/mongod.log

If there are any modifications, please check them yourself. It is recommended to check the last situation of the log. You should see dbexit. Show the last 50 lines and let us continue the analysis.