Am 15.01.2018 um 14:39 schrieb Boyce, Kevin P [US] (AS):
you can't Require mysql because it's wrong when postgresql is used you can't 
Require postgresql because it's wrong when mysql is used

Why wouldn't the mysql/postgres/mariadb packager have a section as follows:
[Install]
Alias=database.service

Then you could have other services reference the dependency on 
database.service.  I think this would work much like the 
display-manager.service.  Not everyone uses gdm, some use lightdm, kdm, etc.  I 
expect it work work the same way.

because that is just a workaround caused by unexpected behavior?

because it would need to be implemented in all unit-files across distributions including user-overrides?

because restart of services with requires is not that funny anyways

because it should not be needed and is *only one* sample case while the problem is a greater one where your idea don't scale at all

come on and solve the call below that way while at boot and shutdown they all get started/stoppe din right order automatically!

systemctl condrestart acpid alsa-state apcupsd asterisk asteriskweb avahi-daemon clamav-milter clamd clamd-sa crond cups dbmail-imapd dbmail-lmtpd dbmail-pop3d dbmail-timsieved dhcpd dhcpd-guest dhcpd-vmware dm-event dnsmasq dovecot forward-flow-home forward-hosting haveged hostapd hostapd-guest httpd imapproxy irqbalance jabber lm_sensors lvm2-lvmetad mailgraph mdmonitor mediatomb monitor-dbmail-imapd monitor-dbmail-lmtpd monitor-dbmail-pop3d monitor-httpd mpdscribble named netatalk network-wan-bridge ntpd openvpn openvpn-as openvpn-flow openvpn-io openvpn-rh openvpn-server openvpn-south panel postfix postgrey preload pulsed pure-ftpd rbldnsd replication rngd rsyncd rsyslog serverstatus smartd smb smokeping spamassassin spamassassin-debug spamassassin-submission spamass-milter spamass-milter-submission sshd trafficserver udisks2 unbound upower vmtoolsd vnstat xinetd
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