A backup script for my IOTstack services. I call the system EDI hence the name of the file :)

backup-edi.sh

#!/bin/sh

# Note: If a password exists for the ssh connection this will be queried every
# time we connect via rsync which can be annoying. Consider a public/private
# key solution without a passphrase if you want to automate it.

set -e

if [ $# -lt 2 ]; then
        echo "Usage: backup-edi.sh <host> <destination>"
        exit 1
fi

HOST=$1
HA_DEST="$2/home-assistant"
IOTSTACK_DEST="$2/iotstack"

check_and_create_dir() {
        if [ ! -e $1 ]; then
                mkdir $1
        elif [ ! -d $1 ]; then
                echo "$1 already exists but is not a directory" 1>&2
                exit 1
        fi
}

check_and_create_dir $HA_DEST
check_and_create_dir $IOTSTACK_DEST

echo "starting backups..."

# Backup the sqlite database first via the sqlite backup command so that we
# don't get a corrupt database due to it being used by HA itself.
echo "creating HA sqlite backup..."
ssh $HOST << EOF
        sqlite3 ./volumes/home_assistant/home-assistant_v2.db ".backup '/home/pi/home-assistant-backup.sqlite'"
EOF
echo "HA sqlite backup created"

echo "downloading HA data..."
# Use sudo rsync so we can copy root only files.
# Exclude .db files so that we don't copy the database twice since we are
# already downloading the backup we created earlier.
rsync -a -e ssh --rsync-path="sudo rsync" --exclude="*.db*" "$HOST:/home/pi/volumes/home_assistant /home/pi/home-assistant-backup.sqlite" $HA_DEST
echo "HA data downloaded"

echo "downloading IOTStack data..."
rsync -a -e ssh "$HOST:/home/pi/IOTstack/compose-override.yml /home/pi/IOTstack/docker-compose.yml" $IOTSTACK_DEST
echo "IOTStack data downloaded"

echo "all backups done"