Rsync Time Backup

Originally published December 22, 2016 @ 11:06 pm

This is a simple wrapper for the awesome rsync-time-backup script by Laurent Cozic. Through clever use of hard links rsync-time-backup greatly speeds up incremental backups and saves disk space.

The wrapper script is for my internal NAS environment. The script selects either production or Dev/QA NAS based on the server name. The script will then mount the correct NFS share, run various checks, prep the target folder and launch the backup. You can download the script here.

#!/bin/bash
#		              |
#                         ___/"\___
#		  __________/ o \__________
#		    (I) (G) \___/ (O) (R)
#		         2016-12-22
# ----------------------------------------------------------------------------
# Salt wrapper for rsync-time-backup
# https://github.com/laurent22/rsync-time-backup
# ----------------------------------------------------------------------------
#
configure() {
    url="https://raw.githubusercontent.com/laurent22/rsync-time-backup/master/rsync_tmbackup.sh"
	this_host=`/bin/hostname | awk -F'.' '{print $1}'`
	if [ $(grep -c "^prod" <<<${this_host}) -eq 1 ] || [ "${this_host}" == "amidala" ]
	then
		nashost="prodnas01.krazyworks.com.local"
		nasshare="/nfspool_prod"
	else
		nashost="devqanas01.krazyworks.com.local"
		nasshare="/nfspool_devqa"
	fi
	mountdir="/nfspool"
	backupdir="rsync_time_backup"
    basedir="/var/adm/bin"
    if [ ! -d "${basedir}" ] ; then mkdir -p "${basedir}" ; fi
	this_time=$(date +'%Y-%m-%d %H:%M:%S')
	this_time_epoch=$(date -d "`echo ${this_time}`" "+%s")
    rsyncbackup="${basedir}/rsync_tmbackup.sh"
    if [ ! -x "${rsyncbackup}" ] || [ ! -s "${rsyncbackup}" ]
    then
        wget --no-check-certificate -O "${rsyncbackup}" "${url}" 2>/dev/null
        chmod 755 "${rsyncbackup}" 2>/dev/null
    fi
}

verify() {

	if [ ! -x "${rsyncbackup}" ]
	then
		echo "Rsync backup script ${rsyncbackup} not found. Exiting..."
		exit 1
	fi
    
	if [ ! -d "${mountdir}" ]
    then
        mkdir -p "${mountdir}"
    fi
	
    if [ `which mountpoint >/dev/null 2>&1 ; echo $?` -eq 0 ]
	then
		mountstatus=$(/bin/mountpoint "${mountdir}" >/dev/null 2>&1 ; echo $?)
		if [ ${mountstatus} -ne 0 ]
		then
			mount "${nashost}:${nasshare}" "${mountdir}"
			mountstatus=$(/bin/mountpoint "${mountdir}" >/dev/null 2>&1 ; echo $?)
			if [ ${mountstatus} -ne 0 ]
			then
				echo "Destination ${mountdir} is not mounted. Exiting..."
				exit 1
			fi
		fi
		else
		if [ `df "${mountdir}" | grep -c ${nashost}` -eq 0 ]
		then
			mount "${nashost}:${nasshare}" "${mountdir}"
			if [ `df "${mountdir}" | grep -c ${nashost}` -eq 0 ]
			then
				echo "Destination ${mountdir} is not mounted. Exiting..."
				exit 1
			fi
		fi
	fi
	
	if [ ! -d "${mountdir}/${backupdir}" ]
	then
		echo "Destination folder ${mountdir}/${backupdir} not found on ${nashost}. Exiting..."
		exit 1
	fi
    
	if [ ! -d "${mountdir}/${backupdir}/${this_host}" ]
    then
        mkdir -p "${mountdir}/${backupdir}/${this_host}"
    fi
	
	if [ ! -f "${mountdir}/${backupdir}/${this_host}/backup.marker" ]
    then
        touch "${mountdir}/${backupdir}/${this_host}/backup.marker"
    fi
}

do_backup() {
	nohup ${rsyncbackup} // "${mountdir}/${backupdir}/${this_host}" </dev/null >/dev/null 2>&1 &
}

do_check() {
	if [ -f "${mountdir}/${backupdir}/${this_host}/backup.inprogress" ]
    then
        echo "Another backup is already in progress. Exiting..."
		exit 1
    fi
}

# RUNTIME
configure
verify
do_check
do_backup

Igor

Experienced Unix/Linux System Administrator with 20-year background in Systems Analysis, Problem Resolution and Engineering Application Support in a large distributed Unix and Windows server environment. Strong problem determination skills. Good knowledge of networking, remote diagnostic techniques, firewalls and network security. Extensive experience with engineering application and database servers, high-availability systems, high-performance computing clusters, and process automation.