#!/bin/bash
#全備方式，一般在從機(jī)上執(zhí)行，適用于小中型mysql數(shù)據(jù)庫(kù)
#刪除15天以前備份
#作者：fafu_li
#時(shí)間：2015.08.10

source /etc/profile    #加載系統(tǒng)環(huán)境變量
source ~/.bash_profile  #加載用戶環(huán)境變量
set -o nounset       #引用未初始化變量時(shí)退出
#set -o errexit      #執(zhí)行shell命令遇到錯(cuò)誤時(shí)退出

user="root"
password="123456"
host="localhost"
port="3306"
#需備份的數(shù)據(jù)庫(kù)，數(shù)組
db=("test")
#備份時(shí)加鎖方式，
#MyISAM為鎖表--lock-all-tables，
#InnoDB為鎖行--single-transaction
lock="--single-transaction"
mysql_path="/usr/local/mysql"
backup_path="${mysql_path}/backup"
date=$(date +%Y-%m-%d_%H-%M-%S)
day=15
backup_log="${mysql_path}/backup.log"

#建立備份目錄
if [ ! -e $backup_path ];then
  mkdir -p $backup_path
fi

#刪除以前備份
find $backup_path -type f -mtime +$day -exec rm -rf {} \; > /dev/null 2>1

echo "開始備份數(shù)據(jù)庫(kù)：${db[*]}"

#備份并壓縮
backup_sql(){
  dbname=$1
  backup_name="${dbname}_${date}.sql"
  #-R備份存儲(chǔ)過(guò)程，函數(shù)，觸發(fā)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 備份 $dbname($size) 成功 "
  else
    cd $backup_path
    rm -rf $backup_name
    echo "$date 備份 $dbname 失敗 "
  fi
}

#循環(huán)備份
length=${#db[@]}
for (( i = 0; i  $length; i++ )); do
    backup_sql ${db[$i]} >> $backup_log 2>1
done

echo "備份結(jié)束,結(jié)果查看 $backup_log"
du $backup_path/*$date* -sh | awk '{print "文件:" $2 ",大小:" $1}'