centos7 xtrabackup mysql（8）增量备份 脚本（2）

Shell 基本运算符
https://www.runoob.com/linux/linux-shell-basic-operators.html

https://blog.csdn.net/weixin_30823001/article/details/96417008

https://blog.csdn.net/weixin_35985795/article/details/113379060

测试用脚本

cat script_xtrabackup.sh

#!/bin/sh . /etc/profile user=root password=1234aA~1 backup_dir=/data/ gzip_dir=$backup_dir log_dir=$backup_dir/log  # 全备是在一周的第几天 full_backup_week_day=1 error_log=  # 备份日期  backup_date=`date +%Y%m%d`   # 备份时间  backup_time=`date +%H-%M-%S`  # 备份时的周几  backup_week_day=`date +%u`  mkdir -p $backup_dir  mkdir -p $log_dir   log_file=${backup_dir}/log/backup.log log_x_file=${backup_dir}/log/backup_xtra.log   x_file_size=`ls -l $log_x_file | awk '{print $5}'`  num_x_file_size=$((x_file_size)) echo $num_x_file_size  if [ $num_x_file_size -gt 9000000 ];then     echo "" > $log_x_file fi   echo $backup_date echo $backup_time echo $backup_week_day  let delta=backup_week_day-full_backup_week_day  echo $delta echo "" echo "" echo '------------------  start  ---------------------'${backup_date} ${backup_time} >> $log_file  if [ "$delta" -eq 0 ] then     # 全量备份     echo '全量备份 delta=$delta' >> ${log_file}      mkdir -p $backup_dir/backup$backup_date      if [ -e "$backup_dir/backup$backup_date/full_backup" ];then         echo "full_backup exist " >> ${log_file}          exit 0     fi      xtrabackup --backup --target-dir=$backup_dir/backup$backup_date/full_backup --user=$user --password=$password --socket=/opt/datadir/mysql/mysql.sock >> ${log_x_file} 2>&1  elif [ "$delta" -eq 1 ] then     echo ""   >> ${log_file}     echo ""   >> ${log_file}     echo "第一次增量备份 delta=$delta" >> ${log_file}     date_last=$(date -d "-1 day" '+%Y%m%d')     echo $date_last >> ${log_file}      if [ -e "$backup_dir/backup${date_last}/inc_1_backup" ];then         echo "inc_1_backup exist " >> ${log_file}          exit 0     fi      if [ ! -e "$backup_dir/backup${date_last}/full_backup" ];then         echo "full_backup not exist " >> ${log_file}          exit 0     fi        xtrabackup --backup --target-dir=$backup_dir/backup${date_last}/inc_1_backup --incremental-basedir=$backup_dir/backup${date_last}/full_backup --user=root --password=1234aA~1 --socket=/opt/datadir/mysql/mysql.sock  >> ${log_x_file} 2>&1  elif [ "$delta" -gt 0 ] then     echo ""   >> ${log_file}     echo ""   >> ${log_file}     echo "delta大于0 增量备份 delta=$delta" >> ${log_file}     date_last=$(date -d "-${delta} day" '+%Y%m%d')     echo $date_last  >> ${log_file}      if [ -e "$backup_dir/backup${date_last}/inc_${delta}_backup" ];then         echo "inc_${delta}_backup exist " >> ${log_file}          exit 0     fi       if [ ! -e "$backup_dir/backup${date_last}/inc_$((delta-1))_backup" ];then         echo "$backup_dir/backup${date_last}/inc_$((delta-1))_backup"         echo "inc_$((delta-1))_backup not exist " >> ${log_file}          exit 0     fi        xtrabackup --backup --target-dir=$backup_dir/backup${date_last}/inc_${delta}_backup --incremental-basedir=$backup_dir/backup${date_last}/inc_$((delta-1))_backup --user=root --password=1234aA~1 --socket=/opt/datadir/mysql/mysql.sock  >> ${log_x_file} 2>&1 else     echo ""   >> ${log_file}     echo ""   >> ${log_file}     echo "delta小于0 增量备份 delta=$delta" >> ${log_file}     let num=7+$delta     echo 'num ='${num} >> ${log_file}     date_last=$(date -d "-${num} day" '+%Y%m%d')     echo $date_last >> ${log_file}     echo $((num-1)) >> ${log_file}      if [ -e "$backup_dir/backup${date_last}/inc_${num}_backup" ];then         echo "inc_${num}_backup exist " >> ${log_file}          exit 0     fi       if [ ! -e "$backup_dir/backup${date_last}/inc_$((num-1))_backup" ];then         echo "inc_$((num-1))_backup not exist " >> ${log_file}          exit 0     fi       xtrabackup --backup --target-dir=$backup_dir/backup${date_last}/inc_${num}_backup --incremental-basedir=$backup_dir/backup${date_last}/inc_$((num-1))_backup --user=root --password=1234aA~1 --socket=/opt/datadir/mysql/mysql.sock  >> ${log_x_file} 2>&1 fi      #sudo xtrabackup --backup --target-dir=/data//backup20240729/inc_3_backup --incremental-basedir=/data//backup20240729/inc_1_backup --user=root --password=1234aA~1 --socket=/opt/datadir/mysql/mysql.sock   

恢复提示语句 脚本

cat create_restore_file.sh

#!/bin/sh  mysql_dir=/opt/datadir/ backup_dir=/data/  date2="20080203" date_store=`date -d "$date2" +%s` echo $date_store file_store='' for file in $backup_dir/* do     echo $file     if [ -d "$file" ];then         echo "$file is a dir"         dir_name=${file##*/}         echo "file name = $dir_name"         if [[ $dir_name == backup* ]];then             echo "dir_name= $dir_name"             substring=${dir_name:6:8}             echo "substring=$substring"             date1=`date -d "$substring" +%s`             echo "$date1"             if [ $date_store -lt $date1 ];then                date_store=$date1                echo "hello $date_store"                file_store=$file                echo "$file_store"             fi         fi     fi done  num='0' for file in $file_store/* do     echo $file     if [ -d "$file" ];then         dir_name=${file##*/}         echo "file name = $dir_name"         if [[ $dir_name == inc* ]];then             echo "dir_name= $dir_name"             substring=${dir_name:4:1}             echo "substring=$substring"             if [ $num -lt $substring ];then                num=$substring             fi         fi     fi done  echo "num= $num" echo "sudo systemctl stop mysqld" > ~/restore_sql.txt echo "sudo cp -r ${mysql_dir}/mysql ${mysql_dir}/bak_mysql" >> ~/restore_sql.txt echo "sudo rm -rf ${mysql_dir}/mysql/*" >> ~/restore_sql.txt  echo "sudo xtrabackup --prepare --apply-log-only --target-dir=$file_store/full_backup" >> ~/restore_sql.txt   cnt=$((num)) echo "cnt = $cnt" if [ $num -gt '0' ];then     for((i=1;i<$cnt;i++));     do         echo "xtrabackup --prepare --apply-log-only --target-dir=$file_store/full_backup --incremental-dir=$file_store/inc_${i}_backup" >> ~/restore_sql.txt     done     echo "xtrabackup --prepare  --target-dir=$file_store/full_backup --incremental-dir=$file_store/inc_${cnt}_backup" >> ~/restore_sql.txt  fi  echo "sudo xtrabackup --copy-back  --target-dir=$file_store/full_backup" >> ~/restore_sql.txt  echo "sudo chown -R mysql.mysql ${mysql_dir}/mysql/*" >> ~/restore_sql.txt  echo "sudo systemctl restart mysqld" >> ~/restore_sql.txt