#! /usr/bin/env bash

# Shell script to backup MySql database
# To backup Nysql databases file to /backup dir and later pick up by your  
# script. You can skip few databases from backup too.
# For more info please see (Installation info):
# http://www.cyberciti.biz/nixcraft/vivek/blogger/2005/01/mysql-backup-script.html
# Last updated: Aug - 2005
# --------------------------------------------------------------------
# This is a free shell script under GNU GPL version 2.0 or above
# Copyright (C) 2004, 2005 nixCraft project
# Feedback/comment/suggestions : http://cyberciti.biz/fb/
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# -------------------------------------------------------------------------
 
VERSION=1.0.0

MyUSER="root"          # USERNAME
MyPASS="los,vce"       # PASSWORD
MyHOST="localhost"     # Hostname
KeepTime=15           # Number of days to keep a back
# Backup Dest directory, change this if you have someother location
DEST="/home/dbbackup"
 

# Linux bin paths, change this if it can't be autodetected via which command
MYSQL="$(which mysql)"
MYSQLDUMP="$(which mysqldump)"
CHOWN="$(which chown)"
CHMOD="$(which chmod)"
GZIP="$(which gzip)"
 
# Main directory where backup will be stored
MBD="$DEST/mysql"
 
# Get hostname
HOST="$(hostname)"
 
# Get data in dd-mm-yyyy format
NOW="$(date +"%Y-%m-%d")"
 
# File to store current backup file
FILE=""
# Store list of databases
DBS=""
 
# DO NOT BACKUP these databases
IGGY="cond_instances information_schema"
 
[ ! -d $MBD ] && mkdir -p $MBD || :
 
# Only root can access it!
$CHOWN 0.0 -R $MBD
$CHMOD 0600 $MBD  
 
# Get all database list first
if [ "$MyPASS" != "" ]
then
   DBS="$($MYSQL -u $MyUSER -h $MyHOST -p$MyPASS -Bse 'show databases')"
else
   DBS="$($MYSQL -u $MyUSER -h $MyHOST -Bse 'show databases')"          
fi
 
for db in $DBS
do
    skipdb=-1
    if [ "$IGGY" != "" ];
    then
        for i in $IGGY
        do
            [ "$db" == "$i" ] && skipdb=1 || :
        done
    fi
 
    if [ "$skipdb" == "-1" ] ; then
        FILE="$MBD/$NOW.$db.$HOST.gz"
        # do all inone job in pipe,  
        # connect to mysql using mysqldump for select mysql database
        # and pipe it out to gz file in backup dir :)
        if [ "$MyPASS" != "" ]
        then
           $MYSQLDUMP -u $MyUSER -h $MyHOST -p$MyPASS $db | $GZIP -9 > $FILE
        else
           $MYSQLDUMP -u $MyUSER -h $MyHOST  $db | $GZIP -9 > $FILE         
        fi
    fi
done  

find "$MBD" -type f -mtime +$KeepTime -exec rm \{\} \;