mysql备份脚本 mysqldump使用方法详解

#!/bin/bash#全备方式，一般在从机上执行，适用于小中型mysql数据库#删除15天以前备份#作者：fafu_li#时间：2015.08.10source /etc/profile    #加载系统环境变量source ~/.bash_profile  #加载用户环境变量set -o nounset       #引用未初始化变量时退出#set -o errexit      #执行shell命令遇到错误时退出user="root"password="123456"host="localhost"port="3306"#需备份的数据库，数组db=("test")#备份时加锁方式，#MyISAM为锁表--lock-all-tables，#InnoDB为锁行--single-transactionlock="--single-transaction"mysql_path="/usr/local/mysql"backup_path="${mysql_path}/backup"date=$(date +%Y-%m-%d_%H-%M-%S)day=15backup_log="${mysql_path}/backup.log"#建立备份目录if [ ! -e $backup_path ];then  mkdir -p $backup_pathfi#删除以前备份find $backup_path -type f -mtime +$day -exec rm -rf {} /; > /dev/null 2>&1echo "开始备份数据库：${db[*]}"#备份并压缩backup_sql(){  dbname=$1  backup_name="${dbname}_${date}.sql"  #-R备份存储过程，函数，触发器  mysqldump -h $host -P $port -u $user -p$password $lock --default-character-set=utf8 --flush-logs -R $dbname > $backup_path/$backup_name    if [[ $? == 0 ]];then    cd $backup_path    tar zcpvf $backup_name.tar.gz $backup_name    size=$(du $backup_name.tar.gz -sh | awk '{print $1}')    rm -rf $backup_name    echo "$date 备份 $dbname($size) 成功 "  else    cd $backup_path    rm -rf $backup_name    echo "$date 备份 $dbname 失败 "  fi}#循环备份length=${#db[@]}for (( i = 0; i < $length; i++ )); do    backup_sql ${db[$i]} >> $backup_log 2>&1doneecho "备份结束,结果查看 $backup_log"du $backup_path/*$date* -sh | awk '{print "文件:" $2 ",大小:" $1}'