[Unit]
Description=ISC DHCP IPv6 server
Documentation=man:dhcpd(8)
RequiresMountsFor=/run
ConditionPathExists=/run/dhcp-server/dhcpdv6.conf
After=vyos-router.service

[Service]
WorkingDirectory=/run/dhcp-server
ExecStart=/bin/sh -ec '\
    [ -e /config/dhcpdv6.leases ] || touch /config/dhcpdv6.leases; \
    chown nobody:nogroup /config/dhcpdv6.leases*; \
    chmod 664 /config/dhcpdv6.leases*; \
    exec /usr/sbin/dhcpd -user nobody -group nogroup -f -6 -pf /run/dhcp-server/dhcpdv6.pid -cf /run/dhcp-server/dhcpdv6.conf -lf /config/dhcpdv6.leases'

[Install]
WantedBy=multi-user.target