backup.sh

#!/usr/bin/env bash

# creates daily backups using hard links
# should be run on a storage server to backup remote 10.0.0.10 host:
#   ./backup.sh 10.0.0.10
# can be executed by crontab on a hourly basis

# stops execution on any error
set -e

storage=/root/backups
host=$1
date=`date +"%Y.%m.%d"`
pathHead="$storage/$host/head"
pathDate="$storage/$host/$date"
bwlimit=8192

# there should be parameters
if [ $# -eq 0 ]; then
    echo "no arguments supplied"
    exit 1
fi

# make sure main directory is present
mkdir -p "$pathHead"

# make sure exclude list is present
touch "$storage/$host/exclude.list"

# check if data for today is present
if [ ! -d "$pathDate" ]; then
    rsync --archive --acls --xattrs --bwlimit=$bwlimit --delete --exclude-from="$storage/$host/exclude.list" --log-file="$pathHead/rsync.log" root@$host:/etc root@$host:/home "$pathHead" &&
    cp --archive --link "$pathHead" "$pathDate" &&
    rm "$pathHead/rsync.log" &&
    /root/scripts/telegram.sh "$host: backup is successful"
fi