MySQL 全量及增量备份，基于xtrabackup 2.3.5

#!/bin/sh  


####################################################
#  AUTHOR          :             JusonSummer       #
#  VERSION         :               V1.0.0          #
#  DATE            :              2016-08-13       #
#  CORPORATION     :              FiberHome        #
####################################################

#基于xtrabackup 2.3.5  
#星期四,星期日全备,其他工作日每天一次增量备份,手动执行可通过设置WEEK_NUM来确定是增量还是全量
 
      
INNOBACKUPEX=innobackupex                    #INNOBACKUPEX的命令  
  
#mysql目标服务器以及备份用户及密码  
MYSQL_USER=root
MYSQL_PASSWORD=root
MYSQL_HOST=localhost
MYSQL_PORT=3306  
MY_CNF=/etc/my.cnf 
MYSQL_CMD=" --user=$MYSQL_USER --password=$MYSQL_PASSWORD --host=$MYSQL_HOST --port=$MYSQL_PORT"  
  
TMP_LOG="/var/log/backup.$$.log"               # $$当前shell进程号
BACKUP_DIR=/mysql_backup                       # 备份的主目录   
FULLBACKUP_DIR=$BACKUP_DIR/full                # 全库备份的目录   
INCRBACKUP_DIR=$BACKUP_DIR/incre               # 增量备份的目录  
BACKUP_LOG_DIR=$BACKUP_DIR/log                 # 备份日志的目录
LOGFILE_NAME=backup_`date +%Y%m%d%H%M%S`.log   # 备份日志文件名

#星期
WEEK_NUM=`date +%w` 
#WEEK_NUM=0

#新建全备和差异备份的目录  
  
mkdir -p $FULLBACKUP_DIR  
mkdir -p $INCRBACKUP_DIR 
mkdir -p $BACKUP_LOG_DIR 

#colour level
SETCOLOR_SUCCESS="echo -en \\033[1;32m"
SETCOLOR_FAILURE="echo -en \\033[1;31m"
SETCOLOR_WARNING="echo -en \\033[1;33m"
SETCOLOR_NORMAL="echo -en \\033[0;39m"

#日志输出函数
LogMsg()
{
        time=`date "+%D %T"`
        echo "[$time] : INFO    : $*"
		echo "[$time] : INFO    : $*" >>$BACKUP_LOG_DIR/$LOGFILE_NAME
        $SETCOLOR_NORMAL
}

LogWarnMsg()
{
        time=`date "+%D %T"`
        $SETCOLOR_WARNING
        echo "[$time] : WARN    : $*"
        $SETCOLOR_NORMAL
}

LogSucMsg()
{
        time=`date "+%D %T"`
        $SETCOLOR_SUCCESS
        echo "[$time] : SUCCESS : $*"
		echo "[$time] : SUCCESS : $*" >>$BACKUP_LOG_DIR/$LOGFILE_NAME
        $SETCOLOR_NORMAL
}

LogErrorMsg()
{
        time=`date "+%D %T"`
        $SETCOLOR_FAILURE
        echo "[$time] : ERROR   : $*"
        $SETCOLOR_NORMAL
}
   
# 检查innobackupex错误输出
check_innobackupex_fail()
{
    #保留一份备份的详细日志
    cat $TMP_LOG>>$BACKUP_LOG_DIR/$LOGFILE_NAME 
	if [ -z "`tail -2 $TMP_LOG | grep ‘completed OK!‘`" ] ; then
    LogErrorMsg "$INNOBACKUPEX命令执行失败" 
    rm -f $TMP_LOG
	LogErrorMsg "错误日志请查看 $BACKUP_LOG_DIR/$LOGFILE_NAME"
    exit 1
  fi
}

   
# 选项检测
$INNOBACKUPEX -v  
if [ `echo $?` -ne 0 ]; then  
    LogErrorMsg "$INNOBACKUPEX命令不存在,请确认是否安装xtrabackup或环境变量是否配置" 
    exit 1  
fi       
  
PORTNUM00=`netstat -lnt|grep ${MYSQL_PORT}|wc -l`
if [ $PORTNUM00 = 0  ];
then
    LogErrorMsg "MySQL处于关闭状态,请打开MySQL."
    exit 1
fi	  
  
if ! `echo ‘exit‘ | mysql -s $MYSQL_CMD --show-warnings=false` ; then  
    LogErrorMsg "数据库的用户名、密码、主机名或端口中存在错误配置!"
    exit 1 
fi  
  

  
# 备份的头部信息   
LogMsg "----------------------------------------------"   
LogMsg "$0: MySQL备份脚本"  
LogMsg "----------------------------------------------"  
LogMsg "开始于: `date +%F‘ ‘%T`"   
     
    
#查找最新的完全备份文件夹(不包括父级目录)  
LATEST_FULL_BACKUP=`find $FULLBACKUP_DIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -nr | head -1`  

  
# 查找最最新全库备份时间,日期格式：2016-07-20
LATEST_FULL_BACKUP_CREATED_DATE=`stat -c %y $FULLBACKUP_DIR/$LATEST_FULL_BACKUP | cut -c 1-10`  
  
  
#星期一,星期二,星期三,星期五,星期六执行增量备份  
if [ $WEEK_NUM -eq 1 -o $WEEK_NUM -eq 2 -o $WEEK_NUM -eq 3 -o $WEEK_NUM -eq 5 -o $WEEK_NUM -eq 6 ] ; then 
    LogMsg  "************************************"  
    LogMsg  "正在执行增量备份...请稍等..."  
    LogMsg  "************************************"
    
	#无全备时,需先做全备
	if [ -z $LATEST_FULL_BACKUP ] ; then
        LogErrorMsg "服务器还没有做过全备份,请根据安装文档先做一次全备！"
	    exit 1
    fi 
    	
    # 以最新的全备目录名在增量备份目录下新建目录  
    LogMsg "增量备份放在$INCRBACKUP_DIR/$LATEST_FULL_BACKUP目录下"    
    NEW_INCRDIR=$INCRBACKUP_DIR/$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_DIR/$LATEST_FULL_BACKUP  
            LogMsg "增量备份将以$INCRBASEDIR备份集作为备份基础"   
        else  
            INCRBASEDIR=$INCRBACKUP_DIR/$LATEST_FULL_BACKUP/$LATEST_INCR_BACKUP
            LogMsg "增量备份将以$INCRBASEDIR备份集作为备份基础"  
        fi  
   
    $INNOBACKUPEX --defaults-file=$MY_CNF $MYSQL_CMD --incremental $NEW_INCRDIR --incremental-basedir $INCRBASEDIR > $TMP_LOG 2>&1  
	check_innobackupex_fail
  
    LogMsg "数据库成功增量备份到:$NEW_INCRDIR"  
	
#星期四,星期日执行全量备份 
elif [ $WEEK_NUM -eq 0 -o $WEEK_NUM -eq 4 ] ; then 
    LogMsg  "************************************"  
    LogMsg  "正在执行全新的完全备份...请稍等..."  
    LogMsg  "************************************"  
	
    $INNOBACKUPEX --defaults-file=$MY_CNF $MYSQL_CMD $FULLBACKUP_DIR> $TMP_LOG 2>&1   
    check_innobackupex_fail
  
    LogMsg "数据库成功全量备份到:$FULLBACKUP_DIR"    
fi  
  
 
#删除过期的全量备份以及增量备份,过期时间为7天 
  
LogMsg "寻找过期的备份文件...请稍等..."   

EXPIRE_FILE=`find $FULLBACKUP_DIR/ -mindepth 1 -maxdepth 1 -type d -mtime +7 -printf "%P\t" ` 

if [ -z "$EXPIRE_FILE" ];then   
    LogMsg "未找到可以删除的过期备份文件" 
else
    for efile in `find $FULLBACKUP_DIR/ -mindepth 1 -maxdepth 1 -type d -mtime +7 -printf "%P\n"` 
    do  
        LogMsg "删除过期全备文件:$efile"
	    rm -rf $FULLBACKUP_DIR/$efile
		LogMsg "删除过期增量备份文件:$efile"
        rm -rf $INCRBACKUP_DIR/$efile 	
    done 
fi
	 
LogSucMsg "备份完成于: `date +%F‘ ‘%T‘ ‘`"  
exit 0