I just read through this thread, and I must say I'm a bit worried, to the point that I'm asking myself: is CentOS still as reliable as it was?
Yes.
This is not a rhetorical question, but a real one. On my Slackware servers, I'm hosting a few dozen websites, various platforms for schools and public libraries, some streaming stuff, webmail, etc. and these machines *never ever* give me any headache. Can I expect the same stability from CentOS 7?
I have a hundred or so CentOS desktops, ~10 webservers hosting many virtual sites, an LDAP infrastructure, a couple of VM servers, a number of large computational clusters, mail servers, mail relays, a Nextcloud host and so on all running on CentOS of various flavours (but mostly 7 now) and ALL of them rock solid. I don't see any of these random reboots because of systemd, it is just not something I recognise - the uptimes are usually in the months to years region.
Look, CentOS is a RHEL clone, RH make money out of this and they aren't going to produce an OS that is flaky. If they did, no one would use it.
P.