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#!/bin/bash
NVMP=/tmp/.rwfs
SOMP=/var/sofs
clean_var_volatile_tmp() {
rm -rf $NVMP/.overlay/var/volatile/tmp/* || :
}
do_sync() {
rsync -a --delete --exclude='**/var/volatile/tmp/**' /tmp/.overlay/ $NVMP/.overlay
sync $NVMP/.overlay
}
stop_nv() {
history -a
do_sync
mount -o remount,ro $NVMP
mount -o remount,ro $SOMP
exit 0
}
# register cleanup function
trap stop_nv SIGINT
trap stop_nv SIGTERM
trap stop_nv EXIT
# make sure the mount points are RW
mount -o remount,rw $NVMP
mount -o remount,rw $SOMP
clean_var_volatile_tmp
# Run rsync periodically to sync the overlay to NV storage
while true; do
do_sync
sleep 10
done
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