innobackupex备份数据库脚本

#!/bin/sh
# 第一次执行它的时候它会检查是否有完全备份,否则先创建一个全库备份
# 当你再次运行它的时候，它会根据脚本中的设定来基于之前的全备或增量备份进行增量备份
INNOBACKUPEX_PATH=innobackupex #INNOBACKUPEX的命令
INNOBACKUPEXFULL=/root/xtrabackup/bin/$INNOBACKUPEX_PATH #INNOBACKUPEX的命令路径
#mysql目标服务器以及用户名和密码qaz2ws3ed
MYSQL_CMD="--host=127.0.0.1 --user=root --password=qaz2ws3ed --port=3306"
MY_CNF=/etc/my.cnf #mysql的配置文件
MYSQL=/bin/mysql
BACKUP_DIR=/data/bakmysql # 备份的主目录
FULLBACKUP_DIR=$BACKUP_DIR/full # 全库备份的目录
INCRBACKUP_DIR=$BACKUP_DIR/incre # 增量备份的目录
FULLBACKUP_INTERVAL=864000 # 全库备份的间隔周期，时间：秒
KEEP_FULLBACKUP=1 # 至少保留几个全库备份
logfiledate=backup.`date +%Y%m%d%H%M`.log
TMPLOG=$BACKUP_DIR/logs/$logfiledate
#开始时间
STARTED_TIME=`date +%s`
#############################################################################

# 显示错误并退出

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

# 检查执行环境
if [ ! -x $INNOBACKUPEXFULL ]; then
    error "$INNOBACKUPEXFULL未安装或未链接找到"
fi
if [ ! -d $BACKUP_DIR ]; then
    echo "备份目标文件夹:$BACKUP_DIR不存在,创建文件夹."
    mkdir -p $BACKUP_DIR
fi
if [ ! -d $BACKUP_DIR/logs ]; then
    mkdir -p $BACKUP_DIR/logs
    echo "日志文件夹:$BACKUP_DIR/logs不存在,创建日志目录"
fi
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
if ! `echo 'exit'|$MYSQL -s $MYSQL_CMD` ; 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
#新建全备和增量备份的目录
mkdir -p $FULLBACKUP_DIR
mkdir -p $INCRBACKUP_DIR
#查找最新的完全备份
LATEST_FULL_BACKUP=`find $FULLBACKUP_DIR -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 $FULLBACKUP_DIR/$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$LATEST_FULL_BACKUP名字作为增量备份基础目录名"
    NEW_INCRDIR=$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/$LATEST_FULL_BACKUP
            echo -e "增量备份将以$INCRBASEDIR作为备份基础目录"
        else
            INCRBASEDIR=$INCRBACKUP_DIR/${LATEST_FULL_BACKUP}/${LATEST_INCR_BACKUP}
            echo -e "增量备份将以$INCRBASEDIR作为备份基础目录"
        fi
    
    echo "使用$INCRBASEDIR作为基础本次增量备份的基础目录."
    $INNOBACKUPEXFULL --defaults-file=$MY_CNF --parallel=8 --use-memory=32G $MYSQL_CMD --incremental $NEW_INCRDIR --incremental-basedir $INCRBASEDIR > $TMPLOG 2>&1
    #保留一份备份的详细日志
    if [ -z "`tail -1 $TMPLOG|grep 'completed OK'`" ] ; then
        echo -e "$INNOBACKUPEX命令执行失败"
        exit 1
    fi
    THISBACKUP=`awk -- "/Backup created in directory/ { split( \\\$0, p, \"'\" ) ; print p[2] }" $TMPLOG`
    echo -n "数据库成功备份到:$THISBACKUP"
    echo
    # 提示应该保留的备份文件起点
    LATEST_FULL_BACKUP=`find $FULLBACKUP_DIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n"|sort -nr|head -1`
    NEW_INCRDIR=$INCRBACKUP_DIR/$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_DIR}/${LATEST_FULL_BACKUP}
    RES_INCRE_BACKUP=`dirname ${INCRBACKUP_DIR}/${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${RES_FULL_BACKUP}和${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 "*********************************"
    $INNOBACKUPEXFULL --defaults-file=$MY_CNF --use-memory=32G $MYSQL_CMD $FULLBACKUP_DIR > $TMPLOG 2>&1 
    #保留一份备份的详细日志
    if [ -z "`tail -1 $TMPLOG|grep 'completed OK!'`" ] ; then
        echo -e "$INNOBACKUPEX命令执行失败:"
        exit 1
    fi
    THISBACKUP=`awk -- "/Backup created in directory/ { split( \\\$0, p, \"'\" ) ; print p[2] }" $TMPLOG`
    echo -n "数据库成功备份到:$THISBACKUP"
    echo
    # 提示应该保留的备份文件起点
    #上面全量备份完成后，删除上期的全量备份及增量备份
    if [ "$LATEST_FULL_BACKUP" != "" ]; then
        if [ -d $FULLBACKUP_DIR/$LATEST_FULL_BACKUP ]; then
            rm -rf $FULLBACKUP_DIR/$LATEST_FULL_BACKUP
            rm -rf $INCRBACKUP_DIR/$LATEST_FULL_BACKUP
        fi
    fi
    LATEST_FULL_BACKUP=`find $FULLBACKUP_DIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n"|sort -nr|head -1`
    RES_FULL_BACKUP=${FULLBACKUP_DIR}/${LATEST_FULL_BACKUP}
    echo
    echo -e '\e[31m NOTE:---------------------------------------------------------------------------------.\e[m' #红色
    echo -e "无增量备份,必须保留$KEEP_FULLBACKUP份全备${RES_FULL_BACKUP}."
    echo -e '\e[31m NOTE:---------------------------------------------------------------------------------.\e[m' #红色
    echo
fi
for efile in $(/usr/bin/find $BACKUP_DIR/logs/ -mtime +10)
do
    if [ -f ${efile} ]; then
        rm -rf "${efile}"
        echo -e "删除过期日志文件:${efile}" >>/$BACKUP_DIR/$logfiledate
    fi;
done
echo "完成于: `date +%F' '%T' '%w`"
exit 0