mysql自动备份与恢复SHELL脚本(1)

此文备份脚本是备一个数据库，恢复时列出之前备份的脚本文件名称列表，用户选择恢复哪个备份文件，然后此文件被恢复到数据库。


完成这个脚本后的第二天跟领导说只备份一个数据库的事，领导说所有库都要备份。于是立马修改脚本。修改后是这样子：

备份脚本mysql_backup.sh运行时带参数指明要备份的数据库，备份完成后文件名是dbname_20110924.tgz这种。

然后恢复时，如果没带参数，将根据备份目录下文件名，可以得到所有的dbname，显示db name列表，让用户选择是恢复哪个数据库；最后，根据所选数据库名，显示出以该dbname打头的备份文件列表，用户再选择将哪个备份文件恢复到所选数据库。
如果带了2个参数，第一个参数是数据库名第二个是sql脚本文件名，直接恢复就OK了。
具体脚本，请看mysql自动备份与恢复SHELL脚本(2)

备份文件存放路径：
/opt/alu/data/backup/mysql

备份与恢复产生的日志文件：
/opt/alu/logs/3rd_party/mysql/backup.log



备份SHELL脚本：mysql_backup.sh

#!/bin/sh

# set -x

## this script is for auto mysql backup
## the backup files will be keeped for 10 days
## backup dir: /opt/alu/data/backup/mysql/
## log file: /opt/alu/logs/3rd_party/mysql/backup.log

DB_NAME=test
MYSQL_USER=nbiopsuser
MYSQL_PWD=nbiopsuser
BACKUP_PATH=/opt/alu/data/backup/mysql
LOG_FILE=/opt/alu/logs/3rd_party/mysql/backup.log
DUMP_FILE=`date +"%Y%m%d"`.sql
TGZ_FILE=`date +"%Y%m%d"`.tgz
SHELL_DIR=/opt/alu/shell/sysmgt
BAK_DAY=7

echo >> ${LOG_FILE}
echo "-------------Backup-------------" >> ${LOG_FILE}
echo `date +"%Y-%m-%d %H:%M:%S"` >> ${LOG_FILE}
echo "-------------Backup-------------" >> ${LOG_FILE}
echo >> ${LOG_FILE}

## check mysql pid, and kill it
checkProcess(){
  PIDS=`ps -ef|grep mysqld|grep -v grep|grep 3306|awk '{print $2}'`
  if [ -n ${PIDS} ]; then
    for pid in ${PIDS}
    do
      kill -9 ${pid}
    done
  fi
}

## check mysql service, make sure it's alive
`mysqladmin -u${MYSQL_USER} -p${MYSQL_PWD} ping >>/dev/null 2>&1`
if [ $? != 0 ]; then
  checkProcess
  echo "mysql is not alive,will be start now!" >> ${LOG_FILE}
  ${SHELL_DIR}/mysql_supervise.sh start >> /dev/null 2>&1
fi

# mysql not running ok, exit
if [ $? != 0 ]; then
  echo "Mysql error"
  exit 1
fi

## delete old files
find ${BACKUP_PATH} -mtime +${BAK_DAY} | xargs rm -rf >> /dev/null 2>&1

## tgz file today exists,delete it
if [ -f ${BACKUP_PATH}/${TGZ_FILE} ]; then
  echo "[${BACKUP_PATH}/${TGZ_FILE}] Backup file is exists,will be backup as .bak" >> ${LOG_FILE}
  cp ${BACKUP_PATH}/${TGZ_FILE} ${BACKUP_PATH}/${TGZ_FILE}".bak" >> ${LOG_FILE}
  rm -f ${BACKUP_PATH}/${TGZ_FILE} >> /dev/null 2>&1
fi

cd ${BACKUP_PATH}
mysqldump -u${MYSQL_USER} -p${MYSQL_PWD} --opt ${DB_NAME} > ${DUMP_FILE}
tar -czvf ${TGZ_FILE} ${DUMP_FILE} >> ${LOG_FILE} 2>&1
echo "[${TGZ_FILE}] Backup success!" >> ${LOG_FILE}
rm -rf ${DUMP_FILE} >> /dev/null 2>&1
echo "Done"

恢复脚本 mysql_restore.sh

#!/bin/sh

#set -x

## it's for mysql restore
## if no file specify,it will use the backup script


BACKUP_PATH=/opt/alu/data/backup/mysql
LOG_FILE=/opt/alu/logs/3rd_party/mysql/backup.log
SHELL_DIR=/opt/alu/shell/sysmgt
DB_NAME=test
MYSQL_USER=nbiopsuser
MYSQL_PWD=nbiopsuser


## make sure if mysql's status is OK 
check_status(){
  `mysqladmin -u${MYSQL_USER} -p${MYSQL_PWD} ping >>/dev/null 2>&1`
  if [ $? != 0 ]; then
    PIDS=`ps -ef|grep mysqld|grep -v grep|grep 3306|awk '{print $2}'`  
    if [ -n ${PIDS} ]; then
      for pid in ${PIDS}
      do
        kill -9 ${pid}
      done
    fi
    echo "Mysql is not alive,will be start now!" >> ${LOG_FILE}  
    ${SHELL_DIR}/mysql_supervise.sh start >> /dev/null 2>&1
  fi
}

# mysql not running ok, exit  
if [ $? != 0 ]; then  
  echo "Mysql error"  
  exit 1  
fi  

p_echo(){
  echo >> ${LOG_FILE}
  echo "------------Restore------------" >> ${LOG_FILE}
  echo `date +"%Y-%m-%d %H:%M:%S"` >> ${LOG_FILE}
  echo "------------Restore------------" >> ${LOG_FILE}
  echo >> ${LOG_FILE}
}


## when no parameter specify,list all backuped scripts
res_noparam(){
  let I=0
  FILES=`ls -t ${BACKUP_PATH}/*.tgz`
  for FILE in ${FILES}
  do
    VARFILE[$I]=$(basename $FILE)
    let I++
  done  
  arr_len=${#VARFILE[*]}
  if [ ${arr_len} != 0 ];then
    echo
    echo "Backuped scripts list below:"
    let index1=0
    while [ ${index1} -lt ${arr_len} ]
    do
      echo
      echo "[$(expr ${index1} + 1)] "${VARFILE[${index1}]}
      let index1++
    done
    echo
    read -p "Please input the number before file name. Otherwise,exit.Input:"
    select=$REPLY
    if [ -z ${select} ];then
      echo
      echo "Exit now"
      exit 1
    fi
    let index2=1
    let flag=1
    while [ ${index2} -le ${arr_len} ]
    do
      if [ "${select}" = "${index2}" ];then
        let flag=0
        break
      else 
        let index2++
        continue
      fi      
    done
    # User's input error,exit
    if [ ${flag} = 1 ];then
      echo
      echo "Exit now"
      exit 1      
    fi
    # User's input correct,backup use the select script
    p_echo
    cd ${BACKUP_PATH} >> /dev/null
    tar -zxvf ${VARFILE[$(expr ${select} - 1)]} >> /dev/null
    FILE_PRE=`ls ${VARFILE[$(expr ${select} - 1)]}|cut -d "." -f1`       
    FILE_RESTORE=${FILE_PRE}".sql"
    mysql -u${MYSQL_USER} -p${MYSQL_PWD} -e "CREATE DATABASE IF NOT EXISTS ${DB_NAME};" >> ${LOG_FILE} 2>&1
    mysql -u${MYSQL_USER} -p${MYSQL_PWD} ${DB_NAME} < ${FILE_RESTORE} >> ${LOG_FILE} 2>&1
    if [ $? = 0 ];then
      echo "[${FILE_RESTORE}] Restore success!"
      echo "[${FILE_RESTORE}] Restore success!" >> ${LOG_FILE}
    else
      echo "[${FILE_RESTORE}] Restore fail!"
      echo "[${FILE_RESTORE}] Restore fail!" >> ${LOG_FILE}
    fi
    rm -f ${FILE_RESTORE} >> /dev/null
    return $?
  else
    echo "No backuped scripts under ${BACKUP_PATH},exit now."
    exit 1    
  fi
}


res_param(){
  if [ -f $1 ]; then
    read -p "Use $1 to restore now?[yes or no]:"
    if [[ "$REPLY" = "y" || "$REPLY" = "Y" || "$REPLY" = "yes" || "$REPLY" = "YES" ]];then
      p_echo
      mysql -u${MYSQL_USER} -p${MYSQL_PWD} -e "CREATE DATABASE IF NOT EXISTS ${DB_NAME};" >> ${LOG_FILE} 2>&1
      mysql -u${MYSQL_USER} -p${MYSQL_PWD} ${DB_NAME} < $1 >> ${LOG_FILE} 2>&1
      if [ $? = 0 ];then
        echo "[$1] Restore success!"
        echo "[$1] Restore success!" >> ${LOG_FILE}
      else
        echo "[$1] Restore fail!"
        echo "[$1] Restore fail!" >> ${LOG_FILE}
      fi
      return $?
    else
      echo "Not restore,exit now"
      exit 1      
    fi
  else
    echo
    echo "File error!" 
    echo
    echo 'List files under '"'${BACKUP_PATH}'"' now'
    res_noparam
  fi  
}


##### main
check_status
if [ $# != 0 ];then
  res_param $1
else
 res_noparam 
fi
echo "Done"

评论

2 楼 hardwin 2011-09-24  

另外，脚本里面的mysql_supervise.sh start 只是个启动和停止Mysql服务的脚本，它的目的是监控mysql是否异常退出的。因为我们是用它启动服务，启动时会在一个目录下生成一个以当前Pid命名的文件；用它停止服务时，会删除该pid命名文件。而如果服务不是通过此脚本停止的，文件就不会删，因此判断服务是异常终止，于是去启动服务。

1 楼 hardwin 2011-09-24  

由于本人基础有限，写脚本有点仓促，于是脚本里面冗余很多，有的验证完全可以用正则来做，但因为不会，就采用很傻瓜的方式，挨个判断用户所输的列表编号是否正确。