I've come up to a problem that I haven't been able to figure out how to
solve. I have a well behaved daemon process that manages its own
children and has both the ability to gracefully reload it's config and
gracefully restart. A graceful restart would work best by starting a
new parent and then signalling the old parent which would exit once the
children complete any in-process requests.
Restart as stop && start is close enough for my use case but in order to
ensure the new parent process starts without waiting for the graceful
stop to complete I had to set "KillMode=none" and explicitly add the
"default" "ExecStop=/bin/kill -s QUIT $MAINPID" to the unit file.
This behaves as expected and restarts are fast enough for my needs.
HOWEVER, I would like stop to wait for all of the children to gracefully
exit should stop be called explicitly and/or as part of system
shutdown/reboot.
I see some long past discussion about adding supporting for ExecRestart
which could theoretically solve the problem but I figure I'm stuck
thinking about it the wrong way.
What's the systemd canonical way to set get the desired behavior?
--
kelsey.cummings@xxxxxxxxx sonic.net, inc.
System Architect 2260 Apollo Way
707.522.1000 Santa Rosa, CA
