Backup: Personal system backup using systemd.

backup.md

Backup

Personal system backup using systemd.

Installation

• Copy backup.sh in /usr/local/bin/backup (checkout /usr/local/bin is in $PATH)
• Copy backup.service in /etc/systemd/system/backup.service
• Copy backup.timer in /etc/systemd/system/backup.timer

Usage

Edit script settings (backup directory, directories to exclude, etc.) and timer (by default: every day at 03:00 o'clock).

Activate:

systemctl enable backup.timer
systemctl start backup.timer

backup.service

# http://patrakov.blogspot.com.es/2011/01/writing-systemd-service-files.html

[Unit]
Description=Personal System Backup

[Service]
Type=simple
PIDFile=/var/run/backup.pid
ExecStartPre=/bin/rm -f /var/run/backup.pid
ExecStart=/usr/local/bin/backup

[Install]
WantedBy=multi-user.target

backup.sh

#! /bin/bash

# Configuration
user="youruser"
backupdir="/home/$user/.backups"
target="/"
backup="$backupdir/$(uname -n)_$(date +%s)_$(date +"%d-%m-%Y")"

echo "Backup target: $target"
echo "Backup destination: $backup.tar.gz"

# Copy data
start=`date +%s`
echo "Copying files..."
rsync -aAX --info=progress2 --exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found","/home/*","/mydata/*"} $target $backup >/dev/null 2>&1
echo "Files copied!"

# Compress data
echo "Compressing files..."
tar -zcvf $backup.tar.gz -C $backup . >/dev/null 2>&1
chown $user $backup.tar.gz
echo "Files compressed!"

# Delete temporal data
echo "Removing temporal files..."
rm -rf $backup >/dev/null 2>&1
echo "Temporal files removed!"

# Delete oldest backup (FIFO: 7 backups)
if [ $(find $backupdir/ | wc -l) -gt 8 ]; then
  echo "Removing old backup: $(find $backupdir/ | grep tar.gz | sort | head -1)"
  rm $(find $backupdir/ | grep tar.gz | sort | head -1) >/dev/null 2>&1
  echo "Old backup removed!"
fi

# Time result
end=`date +%s`
runtime=$((end-start))
((sec=runtime%60, runtime/=60, min=runtime%60, hrs=runtime/60))
timestamp=$(printf "%d:%02d:%02d" $hrs $min $sec)
echo "System backup done in $timestamp"

# Poweroff (optional)
# [ -n "$(uptime -p | grep hour)" ] || poweroff

backup.timer

# https://www.certdepot.net/rhel7-use-systemd-timers/

[Unit]
Description=Execute backup every day at 03:00 o'clock

[Timer]
OnCalendar=*-*-* 03:00:00
Unit=backup.service

[Install]
WantedBy=multi-user.target