/etc/init.d/cryptdisks-early is in cryptsetup 2:1.6.6-5.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | #! /bin/sh
### BEGIN INIT INFO
# Provides:          cryptdisks-early
# Required-Start:    checkroot
# Required-Stop:     umountroot
# Should-Start:      udev mdadm-raid
# Should-Stop:       udev mdadm-raid
# X-Start-Before:    lvm2
# X-Stop-After:      lvm2 umountfs
# X-Interactive:     true
# Default-Start:     S
# Default-Stop:      0 6
# Short-Description: Setup early encrypted block devices.
# Description:
### END INIT INFO
set -e
if [ -r /lib/cryptsetup/cryptdisks.functions ]; then
	. /lib/cryptsetup/cryptdisks.functions
else
	exit 0
fi
INITSTATE="early"
DEFAULT_LOUD=""
case "$CRYPTDISKS_ENABLE" in
[Nn]*)
	exit 0
	;;
esac
case "$1" in
start)
	do_start
	;;
stop)
	do_stop
	;;
restart|reload|force-reload)
	do_stop
	do_start
	;;
force-start)
	FORCE_START="yes"
	do_start
	;;
*)
	echo "Usage: cryptdisks-early {start|stop|restart|reload|force-reload|force-start}"
	exit 1
	;;
esac
 |