mysql backup 脚本

网上备份脚本很多，但考虑都不周全。这里增加了

umask 0077

保证创建备份文件只能是创建者跟root可以访问，其他用户没有权限，保证了数据库备份的安全。

find $BACKUP_DIR -type f -mtime +$COPIES -delete

上面脚本是负责备份的份数管理，

#!/bin/bash
###################################
# $Id: backup 380 2012-04-02 10:38:59Z netkiller $
# Author: [email protected]
# Home:	http://netkiller.github.com
###################################
BACKUP_HOST="localhost"
BACKUP_USER="root"
BACKUP_PASS=""
BACKUP_DIR=/opt/backup
BACKUP_DBNAME="test neo"
#Number of copies
COPIES=7
####################################
MYSQLDUMP="mysqldump"
#TIMEPOINT=$(date -u +%Y-%m-%d)
TIMEPOINT=$(date -u +%Y-%m-%d.%H:%M:%S)
MYSQLDUMP_OPTS="-h $BACKUP_HOST -u$BACKUP_USER -p$BACKUP_PASS"
####################################
umask 0077
test ! -d "$BACKUP_DIR" && mkdir -p "$BACKUP_DIR"
test ! -w $BACKUP_DIR && echo "Error: $BACKUP_DIR is un-writeable." && exit 0

for dbname in $BACKUP_DBNAME
do
	test ! -d "$BACKUP_DIR/$dbname" && mkdir -p "$BACKUP_DIR/$dbname"

	$MYSQLDUMP $MYSQLDUMP_OPTS $dbname | gzip > $BACKUP_DIR/$dbname/$dbname.$TIMEPOINT.sql.gz
done
find $BACKUP_DIR -type f -mtime +$COPIES -delete