实战：INNOBACKUPEX for mysql 5.6自己主动还原脚本-v2

脚本再次更新,共享一下！

#!/bin/sh
#
# 用法：
# ./restore.sh /你备份文件的全路径
#ocpyang@126.com

INNOBACKUPEX=innobackupex
INNOBACKUPEX_PATH=/usr/bin/$INNOBACKUPEX
TMP_LOG="/var/log/restore.$$.log"
MY_CNF=/usr/local/mysql/my.cnf
BACKUP_DIR=/backup # 你的备份主文件夹
FULLBACKUP_DIR=$BACKUP_DIR/full # 全库备份的文件夹
INCRBACKUP_DIR=$BACKUP_DIR/incre # 增量备份的文件夹
MEMORY=4096M # 还原的时候使用的内存限制数
ERRORLOG=`grep -i "^log-error" $MY_CNF |cut -d = -f 2`
MYSQLD_SAFE=/usr/local/mysql/bin/mysqld_safe
MYSQL_PORT=3306

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

#显示错误

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

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

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

# 检查innobackupex错误输出

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

check_innobackupex_fail()
{
    if [ -z "`tail -2 $TMP_LOG | grep ‘completed OK!‘`" ] ; then
    echo "$INNOBACKUPEX命令运行失败:"; echo
    echo "---------- $INNOBACKUPEX的错误输出 ----------"
    cat $TMP_LOG
    #保留一份备份的具体日志
    logfiledate=restore.`date +%Y%m%d%H%M`.txt
    cat $TMP_LOG>/backup/$logfiledate 
    rm -f $TMP_LOG
    exit 1
  fi
}

# 选项检測
if [ ! -x $INNOBACKUPEX_PATH ]; then
  error "$INNOBACKUPEX_PATH在指定路径不存在,请确认是否安装或核实链接是否正确."
fi

if [ ! -d $BACKUP_DIR ]; then
  error "备份文件夹$BACKUP_DIR不存在."
fi

if [ $# != 1 ] ; then
  error "用法: $0 使用还原文件夹的绝对路径"
fi

if [ ! -d $1 ]; then
  error "还原到:$1不存在."
fi

# Some info output
echo "----------------------------"
echo
echo "$0: MySQL还原脚本"
START_RESTORE_TIME=`date +%F‘ ‘%T‘ ‘%w`
echo "数据库还原開始于: $START_RESTORE_TIME"
echo

PARENT_DIR=`dirname $1`

 
if [ $PARENT_DIR = $FULLBACKUP_DIR ]; then
 FULLBACKUP=$1
 echo "还原`basename $FULLBACKUP`"
 echo

else
 if [ `dirname $PARENT_DIR` = $INCRBACKUP_DIR ]; then
 INCR=`basename $1`
 FULL=`basename $PARENT_DIR`
 FULLBACKUP=$FULLBACKUP_DIR/$FULL
  if [ ! -d $FULLBACKUP ]; then
  error "全备:$FULLBACKUP不存在."
  fi
 echo "还原$FULL到增量$INCR"
 echo
 echo "Prepare完整备份集..........."
 echo "*****************************"
 $INNOBACKUPEX_PATH --defaults-file=$MY_CNF --apply-log --redo-only --use-memory=$MEMORY $FULLBACKUP > $TMP_LOG 2>&1
 check_innobackupex_fail

 #推断lsn
 check_incre_file=`find $PARENT_DIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n " | sort -nr  |grep -v ‘^$‘ | head -n 1`

 check_incre_lastlsn=${PARENT_DIR}/${check_incre_file}/xtrabackup_checkpoints

 fetch_incre_lastlsn=`grep -i "^last_lsn" ${check_incre_lastlsn} |cut -d = -f 2`

 check_full_file=`find $FULLBACKUP/ -mindepth 1 -maxdepth 1 -type d -printf "%P\n " | sort -nr  |grep -v ‘^$‘ | head -n 1`

 check_full_lastlsn=$FULLBACKUP/${check_full_file}/xtrabackup_checkpoints

 fetch_full_lastlsn=`grep -i "^last_lsn" ${check_incre_lastlsn} |cut -d = -f 2`

 # Prepare增量备份集,即将增量备份应用到全备文件夹中
 for i in `find $PARENT_DIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -n`;
 do
 ######推断LSN
  if [ "${fetch_incre_lastlsn}"="${fetch_full_lastlsn}" ];then
  echo "*****************************************"
  echo "LSN不须要prepare!"
  echo "*****************************************"
  echo
  break
  else

 ######推断LSN
  echo "Prepare增量备份集$i........"
  echo "*****************************"
  $INNOBACKUPEX_PATH --defaults-file=$MY_CNF --apply-log --redo-only --use-memory=$MEMORY $FULLBACKUP --incremental-dir=$PARENT_DIR/$i > $TMP_LOG 2>&1
  check_innobackupex_fail

  if [ $INCR = $i ]; then
  break
  fi

  fi
 ######推断LSN
 done
 
 else
 error "未知的备份类型"
 fi
fi

echo "prepare全备集，回滚那些未提交的事务..........."
$INNOBACKUPEX_PATH --defaults-file=$MY_CNF --apply-log --use-memory=$MEMORY $FULLBACKUP > $TMP_LOG 2>&1
check_innobackupex_fail
echo "*****************************"
echo "1.数据库还原中 ...请稍等"
echo "*****************************"

$INNOBACKUPEX_PATH --defaults-file=$MY_CNF --copy-back $FULLBACKUP > $TMP_LOG 2>&1
check_innobackupex_fail

 
rm -f $TMP_LOG
echo "2.恭喜,还原成功!."
echo "*****************************"

#改动文件夹权限
echo "改动mysql文件夹的权限."
mysqlcnf="/usr/local/mysql/my.cnf"
mysqldatadir=`grep -i "^basedir" $mysqlcnf |cut -d = -f 2`
`echo ‘chown -R mysql:mysql‘ ${mysqldatadir}`
echo "3.权限改动成功!"
echo "*****************************"

#自己主动启动mysql

INIT_NUM=1
if [ ! -x $MYSQLD_SAFE ]; then
  echo "mysql安装时启动文件未安装到$MYSQLD_SAFE或无运行权限"
  exit 1  #0是运行成功,1是运行不成功
else
 echo "启动本机mysqlport为:$MYSQL_PORT的服务"
 $MYSQLD_SAFE --defaults-file=$MY_CNF  > /dev/null &
 while  [ $INIT_NUM  -le 6 ]
 do
 PORTNUM=`netstat -lnt|grep ${MYSQL_PORT}|wc -l`
 echo "mysql启动中....请稍等..."
 sleep 5
  if [ $PORTNUM = 1  ];
  then
   echo "mysql                                      ****启动成功****"
  exit 0
  fi 
 INIT_NUM=$(($INIT_NUM +1))
 done
   echo -e "mysql启动失败或启动时间过长,请检查错误日志`echo ‘cat ‘ ${ERRORLOG}`"
 echo "*****************************************"
 exit 0
fi

END_RESTORE_TIME=`date +%F‘ ‘%T‘ ‘%w`
echo "数据库还原完毕于: $END_RESTORE_TIME"
exit 0