System unavailable

[Fabian Santiago]

Hello,

I'm new to gitlab ce. I'm still running in my Enterprise free trial period. On centos 7.3. installed via the automated repo based instructions.

Today I discovered my gitlab had become unavailable on a server wide level. No web, ssh, git, nothing. It's a vps server and I logged into my management portal and rebooted the server, after which the system was back up.

Where could I begin looking for the cause?

Besides a bare new os load, and your install instructions, I also added webmin, csf firewall, and changed the ssh port to a custom one.

I enabled LE ssl certs and the renewal cronjob.

I originally used your default local postfix integration but have since switched to using a custom defined external SMTP server. Using the local postfix caused me email receipt issues since it wasn't a true, properly configured email server. My SMTP server is my own private server but it is properly configured for sending / receiving public email.

Any advice would be appreciated. I should add I've never had a server become so totally unresponsive without some external issue, typically IP or dns related. Thru my vps portal I couldn't even access it via the local shell console.

Thanks again.

[Fabian Santiago]

i should also acknowledge that i'm not suggesting gitlab was the cause. it just happens to be the only anomaly i can see at the moment. and i was curious if anyone else has seen this before when running gitlab on centos 7.3. thanks. 

also, are there any OS distros that are better (or more preferred) over another? thanks.