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#!/bin/bash

#Create a timestamp
date=`date "+%Y-%m-%dT%H_%M_%S"`

#Source location, you can change '/' to something like /var/www/html
source_dir="/"

#Backup location on your local system
destination_dir="/home/dd/Documents/"

#Name of Backup folder
backup_folder_name=backup-$date

#Full path of backup; concatenation of above two paths
final_destination_dir=$destination_dir$backup_folder_name

#Create backup directory
mkdir -p $final_destination_dir

#rsync options
rsync_option="-aAXvhP"

#SSH username
ssh_user="peter"

#SSH Port
SSHPort=2222

#IP address of remote host
ip_address="123.45.67.89"

#Symbolic name of latest backup
symbolic_name_recent_backup="latest"

#Exclude folders that you don't want to backup

exclude_folders=(
  "/dev"
  "/usr"
  "/var"
  "/sbin"
  "/home"
  "/etc"
  "/proc"
  "/sys"
  "/tmp"
  "/run"
  "/mnt"
  "media"
)

#Change to the destination directory where rsync will pull data from remote VPS

cd $destination_dir

#Get the most recent snapshot folder name that will be symbolically linked to the latest folder.

latest_backup_dir=$(ls -td -- backup* | head -n 1 | cut -d'/' -f1)

#Place all the exclude folders in a single variable

for item in "${exclude_folders[@]}"
do
  exclude_flags="${exclude_flags} --exclude ${item}"
done

#Remove the folder which was symbolically linked to the snapshots folder earlier

if [ -L $symbolic_name_recent_backup ];
then
     echo "Removing previous symbolic link to the snapshots"
     rm -rf $symbolic_name_recent_backup
fi

#Create a new symbolic link to the latest snapshots

echo "Creating new symbolic link to the latest snapshots"
$(ln -s $latest_backup_dir latest)

#Run rsync

rsync $rsync_option ${exclude_flags} -e  "ssh -p $SSHPort" $ssh_user@$ip_address:$source_dir $final_destination_dir || echo "rsync died with error code $?" >> /var/log/backup.log