backup.sh

#!/bin/bash
#----mysql备份脚本----#
#----Version-1.0----#
#----By Ye----#

INNOBACKUPEX_ORDER=innobackupex
INNOBACKUPEX_PATH=/usr/bin/$INNOBACKUPEX_ORDER

MYSQL_PARAMETER="--user=root --password=root --host=localhost"
TMPLOG=/root/backup/bak.$$.log

BACKUP_PATH=/root/backup  # 备份的主目录  
FULLBACKUP_PATH=$BACKUP_PATH/full  # 完全备份的目录  
INCREBACKUP_PATH=$BACKUP_PATH/incre  # 增量备份的目录  

FULLBACKUP_INTERVAL=86400  #备份全库的间隔 1天
KEEP_FULLBACKUP=1 # 至少保留几个全库备份
logfiledate=backup.`date +%Y%m%d%H%M`.txt

STARTED_TIME=`date +%s` #开始时间

#############################################################################  

# 检查错误并退出  

#############################################################################  

error()
{
    echo "$1" 1>&2
    exit 1
}

# 检查执行文件,如果file存在且是可执行。
if [ ! -x $INNOBACKUPEX_PATH ]; then
  error "$INNOBACKUPEX_PATH未安装或未链接到/usr/bin."
fi

# 如果存在并且是目录
if [ ! -d $BACKUP_PATH ]; then
  error "备份目标文件夹:$BACKUP_PATH不存在."
fi

#检查mysql运行状态，先给mysql_status赋值

mysql_status=`netstat -nl | awk 'NR>2{if ($4 ~ /.*:3306/) {print "Yes";exit 0}}'`
if [ "$mysql_status" != "Yes" ];then
    error "MySQL 没有启动运行."
fi

#检查用户名密码是否正确
if ! `echo 'exit' | mysql -s $MYSQL_PARAMETER` ; then
 error "提供的数据库用户名或密码不正确!"
fi

# 备份的头部信息  

echo "----------------------------"  
echo  
echo "$0: MySQL备份脚本"  
echo "开始于: `date +%F' '%T' '%w`"  
echo  


#新建全备和差异备份的目录  

mkdir -p $FULLBACKUP_PATH
mkdir -p $INCREBACKUP_PATH

#查找最新的完全备份  
LATEST_FULL_BACKUP=`find $FULLBACKUP_PATH -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -nr | head -1`

# 查找最近修改的最新备份时间  
LATEST_FULL_BACKUP_CREATED_TIME=`stat -c %Y $FULLBACKUP_PATH/$LATEST_FULL_BACKUP`

#如果全备有效进行增量备份否则执行完全备份  
if [ "$LATEST_FULL_BACKUP" -a `expr $LATEST_FULL_BACKUP_CREATED_TIME + $FULLBACKUP_INTERVAL + 5` -ge $STARTED_TIME ] ; then
    # 如果最新的全备未过期则以最新的全备文件名命名在增量备份目录下新建目录  
    echo -e "完全备份$LATEST_FULL_BACKUP未过期,将根据$LATEST_FULL_BACKUP名字作为增量备份基础目录名"  
    echo "                     "  
    NEW_INCRDIR=$INCREBACKUP_PATH/$LATEST_FULL_BACKUP
    mkdir -p $NEW_INCRDIR

    # 查找最新的增量备份是否存在.指定一个备份的路径作为增量备份的基础  
    LATEST_INCR_BACKUP=`find $NEW_INCRDIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n"  | sort -nr | head -1`
        if [ ! $LATEST_INCR_BACKUP ] ; then
            INCRBASEDIR=$FULLBACKUP_PATH/$LATEST_FULL_BACKUP
            echo -e "增量备份将以$INCRBASEDIR作为备份基础目录"  
            echo "                     "  
        else
            INCRBASEDIR=$INCREBACKUP_PATH/${LATEST_FULL_BACKUP}/${LATEST_INCR_BACKUP}
            echo -e "增量备份将以$INCRBASEDIR作为备份基础目录"  
            echo "                     "  
        fi

    echo "使用$INCRBASEDIR作为基础本次增量备份的基础目录."  
    $INNOBACKUPEX_ORDER $MYSQL_PARAMETER --incremental $NEW_INCRDIR --incremental-basedir=$INCRBASEDIR 2>$TMPLOG
#保留一份备份的详细日志  

    cat $TMPLOG>/root/backup/$logfiledate

    if [ -z "`tail -1 $TMPLOG | grep 'completed OK!'`" ] ; then
     echo "$INNOBACKUPEX_ORDER命令执行失败:"; echo  
     echo -e "---------- $INNOBACKUPEX_PATH错误 ----------"  
     cat $TMPLOG
     rm -f $TMPLOG
     exit 1
    fi

    THISBACKUP=`awk -- "/Backup created in directory/ { split( \\\$0, p, \"'\" ) ; print p[2] }" $TMPLOG`
    rm -f $TMPLOG


    echo -n "数据库成功备份到:$THISBACKUP"  
    echo  
 # 提示应该保留的备份文件起点  

    LATEST_FULL_BACKUP=`find $FULLBACKUP_PATH -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -nr | head -1`

    NEW_INCRDIR=$INCREBACKUP_PATH/$LATEST_FULL_BACKUP

    LATEST_INCR_BACKUP=`find $NEW_INCRDIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n"  | sort -nr | head -1`

    RES_FULL_BACKUP=${FULLBACKUP_PATH}/${LATEST_FULL_BACKUP}

    RES_INCRE_BACKUP=`dirname ${INCREBACKUP_PATH}/${LATEST_FULL_BACKUP}/${LATEST_INCR_BACKUP}`

    echo  
    echo -e '\e[31m NOTE:---------------------------------------------------------------------------------.\e[m' #红色  
    echo -e "必须保留$KEEP_FULLBACKUP份全备即全备${RES_FULL_BACKUP}和${RES_INCRE_BACKUP}目录中所有增量备份."  
    echo -e '\e[31m NOTE:---------------------------------------------------------------------------------.\e[m' #红色  
    echo  

else
    echo  "*********************************"  
    echo -e "正在执行全新的完全备份...请稍等..."  
    echo  "*********************************"  
    $INNOBACKUPEX_ORDER $MYSQL_PARAMETER $FULLBACKUP_PATH > $TMPLOG 2>&1
    #保留一份备份的详细日志  

    cat $TMPLOG>/root/backup/$logfiledate


    if [ -z "`tail -1 $TMPLOG | grep 'completed OK!'`" ] ; then
     echo "$INNOBACKUPEX_ORDER命令执行失败:"; echo  
     echo -e "---------- $INNOBACKUPEX_PATH错误 ----------"  
      cat $TMPLOG
      rm -f $TMPLOG
      exit 1
    fi


    THISBACKUP=`awk -- "/Backup created in directory/ { split( \\\$0, p, \"'\" ) ; print p[2] }" $TMPLOG`
    rm -f $TMPLOG

    echo -n "数据库成功备份到:$THISBACKUP"  
    echo  
   # 提示应该保留的备份文件起点  

    LATEST_FULL_BACKUP=`find $FULLBACKUP_PATH -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -nr | head -1`

    RES_FULL_BACKUP=${FULLBACKUP_PATH}/${LATEST_FULL_BACKUP}

    echo  
    echo -e '\e[31m NOTE:---------------------------------------------------------------------------------.\e[m' #红色  
    echo -e "无增量备份,必须保留$KEEP_FULLBACKUP份全备即全备${RES_FULL_BACKUP}."  
    echo -e '\e[31m NOTE:---------------------------------------------------------------------------------.\e[m' #红色  
    echo  

fi
#删除过期的全备  

echo -e "find expire backup file...........waiting........."  
echo -e "寻找过期的全备文件并删除">>/root/backup/$logfiledate
for efile in $(/usr/bin/find $FULLBACKUP_PATH/ -mtime +6)
do
    if [ -d ${efile} ]; then
    rm -rf "${efile}"
    echo -e "删除过期全备文件:${efile}" >>/root/backup/$logfiledate
    elif [ -f ${efile} ]; then
    rm -rf "${efile}"
    echo -e "删除过期全备文件:${efile}" >>/root/backup/$logfiledate
    fi;

done

if [ $? -eq "0" ];then
   echo  
   echo -e "未找到可以删除的过期全备文件"  
fi



echo  
echo "完成于: `date +%F' '%T' '%w`"  
exit 0