mysql_backup.sh

#! /bin/bash

if [ $# -eq 0 ] || [ $# -eq 1 ] || [ $# -eq 2 ]
  then
    echo "usage : mysql_backup.sh user passw backup destination"
    exit 1
fi

umask 007

renice 10 $$ >/dev/null

MYSQL_USER=$1
MYSQL_PASSWORD=$2

BASE_PATH=$3
TIMESTAMP=$(date +"%F")
BACKUP_DIR="/$BASE_PATH/mysql/$TIMESTAMP"
MYSQL=/usr/bin/mysql
MYSQLDUMP=/usr/bin/mysqldump

mkdir -p "$BACKUP_DIR"

databases=`$MYSQL --user=$MYSQL_USER -p$MYSQL_PASSWORD -e "SHOW DATABASES;" | grep -Ev "(Database|information_schema|performance_schema)"`

for db in $databases; do
  $MYSQLDUMP --force --opt --user=$MYSQL_USER -p$MYSQL_PASSWORD --databases $db | gzip > "$BACKUP_DIR/$db.gz"
done