system/scripts/sh/init-s3-cryfs.sh

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#!/bin/sh
#Georg Pfuetzenreuter <georg@lysergic.dev>
#Not intended for general purpose use - designed to initialize a construct of bind -> CryFS -> S3 mounts
basemount="/s3"
cryptmount="$basemount/container"
sysmount="/mnt/s3cry"
datamount="/data"
ingestmount="$datamount/ingest/s3"
clearingestmount="${ingestmount}_clear"
mounts="/proc/mounts"
check () {
grep -qs "$1" "$mounts"
}
check_ingestmount () {
if check "$ingestmount"
then
echo "Already mounted."
exit 0
fi
}
stop_mounts () {
if check "$ingestmount "
then
echo "Unmounting $ingestmount ..."
umount "$ingestmount"
fi
if check "$clearingestmount "
then
echo "Unmounting $clearingestmount ..."
umount "$clearingestmount"
fi
if check "$sysmount"
then
echo "Unmounting $sysmount ..."
fusermount -u "$sysmount"
fi
if check "$basemount"
then
echo "Unmounting $basemount ..."
umount "$basemount"
fi
}
start_mounts () {
check_ingestmount
if ! check "$basemount"
then
echo "Mounting $basemount ..."
s3fs lysergic "$basemount" -o url=https://s3.eu-central-2.wasabisys.com -o allow_other
if [ ! "$?" = "0" ]
then
echo "FATAL - s3fs failed"
exit 1
fi
#we don't want this, it's an unencrypted s3 mount, but helpful for testing
if ! check "$clearingestmount "
then
echo "Mounting $clearingestmount ..."
mount -o bind "$basemount/clear" "$clearingestmount"
fi
if ! check "$sysmount"
then
echo "Mounting $sysmount ..."
cryfs "$cryptmount" "$sysmount" -- -o allow_other < /etc/.cry >/dev/null 2>&1
if [ ! "$?" = "0" ]
then
echo "FATAL - cryfs failed"
exit 1
fi
if ! check "$ingestmount "
then
echo "Mounting $ingestmount ..."
mount -o bind "$sysmount" "$ingestmount"
if [ ! "$?" = "0" ]
then
echo "FATAL - bind mount failed"
exit 1
fi
fi
fi
fi
}
case "$1" in
"start" ) start_mounts ;;
"stop" ) stop_mounts ;;
"status" ) check_ingestmount ;;
* ) echo "$0 [start|stop|status]" ;;
esac