I have three servers from 1and1.
All of them are setup the same running named, apache, mysql, postfix, dovecot and related services.
Two of the servers are running great. The third one - and the one with the least traffic - randomly locks up or reboots.
I've found nothing in my logs and I also asked 1and1 to check and they found no problem in their logs or mine.
Old journal logs are saved and I constantly have top and nethogs open. I never notice any spikes of usage for any resource and there's nothing in any logs as to what's happening.
Sometimes I randomly can't connect and no service responds at all. To remedy this I must log into 1and1 and reboot the server from there.
Other times, it simply reboots itself.
Is there a logging system that performs extensive logging and/or tracking of resources and processes to be able to try to pin this down?
Considering I have three servers configured exactly the same and only this one is having problems I've a few possibilities in mind including possible attacks but I can't be certain.
I feel like I need some EXTREME logging to pin this down.
Each server is running Arch linux. All configuration was done by myself so I know all three are 100% the same configuration-wise.