Comment 1 for bug 1298957

Services should be at least SIGHUP-ed in order to ensure file descriptors updated once logs has been rotated.

This issue is also related to https://bugs.launchpad.net/oslo/+bug/1276694 - in Fuel<=4.x (with Havana MOS) OS services do not support SIGHUP yet.

According to the mentioned related #1276694 issue, after OS I-3 (Fuel 5.0 and cannot be backported) we should ensure all OS services (except murano*, glance* which do not support SIGHUP yet) must be SIGHUPPed in postrotate sections of 10-fuel.conf & 20-fuel.conf (please note: in Fuel we use these ones to ensure log rotation policy for deployed environments).