mysql_backup.sh

#!/bin/bash
# Script will output dumps for all databases using seperate files

USER="root"
HOST="localhost"
MYSQL="$(which mysql)"
MYSQLDUMP="$(which mysqldump)"
OUTPUT_DIR="/backup/MySQL_Backup"

# Parse options
while getopts ":u:h:o:" opt; do
    case $opt in
        u)
            USER=$OPTARG
            ;;
        h)
            HOST=$OPTARG
            ;;
        o)
            OUTPUT_DIR=$OPTARG
            ;;
        \?)
            echo "Invalid option: -$OPTARG" >&2
            exit 1
            ;;
        :)
            echo "Option -$OPTARG requires an argument." >&2
            exit 1
            ;;
    esac
done

VALIDATION_ERROR=false

if [ -z "$USER" ]; then
    echo "User has not been specified" >&2
    VALIDATION_ERROR=true
fi

if [ -z "$OUTPUT_DIR" ]; then
    echo "Output dir has not been specified" >&2
    VALIDATION_ERROR=true
fi

if $VALIDATION_ERROR ; then
    exit 1
fi

dd=`date +%Y%m%d`

DBS="$($MYSQL -u $USER -h $HOST -Bse 'show databases')"
for db in $DBS
do
    if [ $db != "information_schema" ]; then
        FILE=$OUTPUT_DIR/$db$dd.sql
        $MYSQLDUMP -u $USER -h $HOST --single-transaction --routines --triggers  $db > $FILE
	/bin/gzip $FILE &
    fi
done

# Delete all backups older than 7 days
find $OUTPUT_DIR -mtime +7 -exec rm -f {} \;