dhcrelay is missing /var/run/dhcp in diskless mode
Although the dhcrelay package creates /var/run/dhcp during install it’s missing after rebooting alpine in diskless mode. Dhcrelay does start without it but openrc is unable to stop or restart it.
The dhcrelay init script needs to create the directory like it is already done for dhcpd.
(from redmine: issue id 10024, created on 2019-02-21, closed on 2019-06-19)