Hello!
So I have this problem: I have a cloudserver running on RunAbove platform (Public cloud; KVM OpenStack). Everything is fine, load is very low, RAM usage is good, CPU usage few percents. But for some reason the instance freezes for ~30 minutes everyday at approximately same time.
I checked I don't have any cron task that could cause the lockup, contacted RunAbove support and they were unable to help me.
/var/log/messages
http://pastebin.com/CyY7z8KA
Munin graphs
http://monitor.fhrnet.eu/munin/localhost/localhost/index.html
Does anyone have a clue why could this be happening?
I think I'll give it 2 more days to find a solution and then I will restore a 2 month old snapshot or better, reinstall the whole system. I would like to keep this as a last resort, because I'm really curious why this happens. This is a production machine BTW. Those crashes happen really early in the morning so no big deal for local users but google cares about uptime as do I. Server is running nginx, php-fpm 5.6, mariadb, dovecot, postfix and some misc stuff. CentOS 7 x64
X-Posted here from /r/sysadmin
EDIT:
I think this may be caused by bad drive or some other instance consuming all available disk bandwidth.
EDIT 2: [SOLVED] I created a clone of the instance (on another hardware) which didn't crash, while the original one still crashed. So it's provider's problem. Thank you all for all your support!
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