kamailio 5.x.x removed mi_commands / broken init script
I use alpine/linux 3.10.x with kamailio 5.2.x from apk. The /etc/init.d/kamailio used for "reload" an mi command to reload is now without function.
I would prefer an reload with "stop, start" kind of mechanism.
https://www.kamailio.org/wiki/install/upgrade/4.4.x-to-5.0.0 (see removed modules, mi_*)
you can check that with "kamcmd core.uptime" - reload has no inpackt to uptime at the moment.