一 前提
系统环境：centos6.1
脚本作用：备份指定服务器上的指定数据库，并通过scp传送到另一台备份主机，然后发送备份是否成功邮件到指定邮箱
思路：首先在备份脚本中把备份报告导出为一个db_backup.log文件，然后邮件脚本会把这个log内容作为邮件内容发送给指定用户，也就实现了邮件通知
说明：如果需要备份到远程主机，需要首先做好ssh密钥认证，scp要使用到
二 备份脚本
备份脚本用法:如果需要备份某个数据库，在脚本后面添加一条备份命令，像下面这样
backup_db 10.90.5.50 dbname mysql 123456 innodb
函数名 mysql所在IP 所要备份的数据库名 连接数据库用户名 密码 数据库引擎类型
#name：backup_db.sh
#Purpose: backup mysql database
#Author: xxx
#Date: 2014-08-26
#useage：backup_db IP databasename user password dbtype
#example：backup_db 10.90.5.50 dbname mysql 123456 innodb
#备份时间
DATE=`date -d"today" +%Y%m%d_%H%M%S`
#前一个时间
DATE2=`date -d"1 month ago" +%Y%m%d_%H%M%S`
#备份目录
HOMEDIR=/data/dbdata_backup
MYSQLDUMP='/usr/local/mysql/bin/mysqldump'
#删除上一次备份报告
rm -f $HOMEDIR/db_backup.log
#################################################################function############################################################################
#backup function
backup_db ()
{
if [ $# -ne 5 ];then
echo "Usage: backupdb IP dbname user password dbtype"
echo "Please try again"
exit 1
fi
IP=$1
DBNAME=$2
USER=$3
PASSWORD=$4
DBTYPE=$5
echo "--------------------------start backup $IP $DBNAME db-------------------------------------" >> $HOMEDIR/db_backup.log
echo "start date: `date +%Y%m%d_%H%M%S`" >> $HOMEDIR/db_backup.log
if [ $DBTYPE="innodb" ];then
$MYSQLDUMP -u$USER -p$PASSWORD -h$IP --single-transaction --flush-logs --routines --events --master-data=2 "$DBNAME" > $HOMEDIR/$DBNAME/${DBNAME}_$DATE.sql
if [ $? -ne 0 ];then
echo "$IP $DBNAME $DBTYPE db backup is not success ,please check it out!" >> $HOMEDIR/db_backup.log
else
echo "$IP $DBNAME $DBTYPE db backup is success!" >> $HOMEDIR/db_backup.log
fi
else
$MYSQLDUMP -u $USER -p$PASSWORD -h$IP -l --flush-logs --routines --events --master-data=2 "$DBNAME" > $HOMEDIR/$DBNAME/${DBNAME}_$DATE.sql
if [ $? -ne 0 ];then
echo "$IP $DBNAME $DBTYPE db backup is not success ,please check it out!" >> $HOMEDIR/db_backup.log
else
echo "$IP $DBNAME $DBTYPE db backup is success!" >> $HOMEDIR/db_backup.log
fi
fi
echo "End date: `date +%Y%m%d_%H%M%S`" >> $HOMEDIR/db_backup.log
gzip $HOMEDIR/$DBNAME/${DBNAME}_$DATE.sql
SIZE=`du -sh $HOMEDIR/$DBNAME/${DBNAME}_$DATE.sql.gz | awk '{print $1}'`
echo "the file size is: $SIZE" >> $HOMEDIR/db_backup.log
echo "--------------------------end backup $IP $DBNAME db-------------------------------------" >> $HOMEDIR/db_backup.log
#delete the backup files which were create two month ago
rm -f $HOMEDIR/$DBNAME/${DBNAME}_$DATE2.sql.gz
}
#scp function : scp the backup file to another server as different place backup
scp_function ()
{
if [ $# -ne 1 ];then
echo "Usage: scp_function dbname"
echo "Please try again"
exit 1
fi
DBNAME=$1
scp -P52814 -i /home/lj/.ssh/id_rsa $HOMEDIR/$DBNAME/${DBNAME}_$DATE.sql.gz [email protected]:/data/dbbackup/
if [ $? -ne 0 ];then
echo "$DBNAME db backup data transfer is not success ,please check it out!" >> $HOMEDIR/db_backup.log
else
echo "$DBNAME db backup data transfer is success!" >> $HOMEDIR/db_backup.log
fi
}
##########################################################################function##################################################################
#使用perl命令执行邮件脚本，，以发送备份报告，其中的sendmail.pl为下面发邮件脚本
perl /home/scripts/sendmail.pl
三 发送邮件脚本
