MySQL备份脚本

说明

· MySQL v5.7.24
· OS Ubuntu 16.04
· Tools Xtrabackup

配置文件

# mysql 用户名
user=op
# mysql 密码
password=PASSWD
# 备份路劲
full_backup_dir=/home/op/db_bak/full
incr_backup_dir=/home/op/db_bak/incr
# percona-xtrabackup 备份软件路径
xtrabackup_dir=/usr/bin/innobackupex
# mysql配置文件
mysql_conf_file=/etc/my.cnf
# 错误日志文件(根据此文件知道备份是否成功)
# format:
# {dir:full/2019-02-14_00-00-00,date:2019-02-14}
error_log=/var/db_script/log/mysql_increment_hot_backup.err
##log文件
log_dir=/var/db_script/log

全量备份

#!/usr/bin/env bash

# 读取配置文件中的所有变量值, 设置为全局变量
# 配置文件
conf_file="/var/db_script/conf/mysql_increment_hot_backup.conf"
# mysql 用户
user=`sed '/^user=/!d;s/.*=//' $conf_file`
# mysql 密码
password=`sed '/^password=/!d;s/.*=//' $conf_file`
# mysql 备份目录
full_backup_dir=`sed '/^full_backup_dir=/!d;s/.*=//' $conf_file`
incr_backup_dir=`sed '/^incr_backup_dir=/!d;s/.*=//' $conf_file`
# percona-xtrabackup 备份软件路径
xtrabackup_dir=`sed '/^xtrabackup_dir=/!d;s/.*=//' $conf_file`
#文件目录下创建的文件
deleted_full_dir=`find $full_backup_dir -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -n | head -1`
deleted_incr_dir=`find $incr_backup_dir -mindepth 1 -maxdepth 1 -type d -mtime +6`
# 创建相关目录
log_dir=`sed '/^log_dir=/!d;s/.*=//' $conf_file`
# mysql 配置文件
mysql_conf_file=`sed '/^mysql_conf_file=/!d;s/.*=//' $conf_file`
# 错误日志文件
error_log=`sed '/^error_log=/!d;s/.*=//' $conf_file`
# 备份日期
backup_date=`date +%F_%H-%M-%S`

if [ ! -d $full_backup_dir ] > $log_dir/${backup_date}.log 2>&1;
    then
        mkdir -p $full_backup_dir
fi

if [ ! -d $incr_backup_dir ] > $log_dir/${backup_date}.log 2>&1;
    then
        mkdir -p $incr_backup_dir
fi

if [ ! -d $log_dir ] > $log_dir/${backup_date}.log 2>&1;
    then
        mkdir -p $log_dir
fi

# 全量备份
function full_backup() {
  mkdir -p $full_backup_dir/$backup_date
  sudo $xtrabackup_dir \
    --defaults-file=$mysql_conf_file \
    --user=$user \
    --password=$password \
    --no-timestamp \
    $full_backup_dir/$backup_date >> $log_dir/${backup_date}.log 2>&1
  return $?
}
# 生成可用备份
function completed_backup () {
    sudo chown -R op:op $full_backup_dir
    latest_dir=`find $full_backup_dir -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -nr | head -1`
    $xtrabackup_dir --apply-log --redo-only $full_backup_dir/$latest_dir >> $log_dir/${backup_date}.log 2>&1
    return $?
    if [ $? != 0 ];
    then
        echo "$?"
    fi
}

# 删除过期的备份(一般在全备完成后使用)
function delete_before_backup() {
  cd $full_backup_dir
  sudo rm -rf $deleted_full_dir
  incr_count=`ls $incr_backup_dir | wc -w`
  if [ "$incr_count" != "0" ];
  then
    sudo rm -r $incr_backup_dir/$deleted_incr_dir
  fi
}
# 记录 错误消息到文件
function logging_backup_err() {
  echo " dir:${1}_${backup_date}, \
         date:${backup_date}}" >> $error_log
}

# 测试配置文件正确性
function test_conf_file() {
  # 判断每个变量是否在配置文件中有配置，没有则退出程序
  if [ ! -n "$user" ]; then echo 'fail: configure file user not set'; exit 2; fi
  if [ ! -n "$password" ]; then echo 'fail: configure file password not set'; exit 2; fi
  if [ ! -n "$full_backup_dir" ]; then echo 'fail: configure file full_backup_dir not set'; exit 2; fi
  if [ ! -n "$mysql_conf_file" ]; then echo 'fail: configure file mysql_conf_file not set'; exit 2; fi
  if [ ! -n "$error_log" ]; then echo 'fail: configure file error_log not set'; exit 2; fi
}

# 执行
function run() {
  # 检测配置文件值
  test_conf_file
  #全量备份
  full_backup
  #生成可用备份
  completed_backup
  # 清除过期的备份
  delete_before_backup
}

run

增量备份

#!/usr/bin/env bash
# 读取配置文件中的所有变量值, 设置为全局变量
# 配置文件
conf_file="/var/db_script/conf/mysql_increment_hot_backup.conf"
# mysql 用户
user=`sed '/^user=/!d;s/.*=//' $conf_file`
# mysql 密码
password=`sed '/^password=/!d;s/.*=//' $conf_file`
# mysql 备份目录
full_backup_dir=`sed '/^full_backup_dir=/!d;s/.*=//' $conf_file`
incr_backup_dir=`sed '/^incr_backup_dir=/!d;s/.*=//' $conf_file`
# percona-xtrabackup 备份软件路径
xtrabackup_dir=`sed '/^xtrabackup_dir=/!d;s/.*=//' $conf_file`
#文件目录下最新创建的文件
latest_full_dir=`sudo find $full_backup_dir -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -nr | head -1`
# 创建相关目录
log_dir=`sed '/^log_dir=/!d;s/.*=//' $conf_file`
# mysql 配置文件
mysql_conf_file=`sed '/^mysql_conf_file=/!d;s/.*=//' $conf_file`
# 备份错误日志文件
error_log=`sed '/^error_log=/!d;s/.*=//' $conf_file`
# 备份日期
backup_date=`date +%F_%H-%M-%S`

if [ ! -d $incr_backup_dir ] ;
    then
        mkdir -p $incr_backup_dir
fi

# 增量备份
function increment_backup() {
  count=`ls $incr_backup_dir | wc -w`
  if [ "$count" == "0" ];
  then
    sudo $xtrabackup_dir \
        --defaults-file=$mysql_conf_file \
        --user=$user \
        --password=$password \
        --no-timestamp \
        --incremental \
        $incr_backup_dir/$backup_date \
        --incremental-basedir=$full_backup_dir/$latest_full_dir > $log_dir/${backup_date}.log 2>&1
  return $?
  else
    latest_incr_dir=`sudo find $incr_backup_dir -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -nr | head -1`
    sudo $xtrabackup_dir \
        --defaults-file=$mysql_conf_file \
        --user=$user \
        --password=$password \
        --no-timestamp \
        --incremental \
        $incr_backup_dir/$backup_date \
        --incremental-basedir=$incr_backup_dir/$latest_incr_dir > $log_dir/${backup_date}.log 2>&1
  return $?
  fi
}

#生成可用备份
function completed_backup () {
    sudo chown -R op:op $incr_backup_dir
    latest_incr_dir=`sudo find $incr_backup_dir -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -nr | head -1`
    sudo $xtrabackup_dir --apply-log --redo-only $full_backup_dir/$latest_full_dir --incremental-dir=$incr_backup_di
r/$latest_incr_dir >> $log_dir/${backup_date}.log 2>&1
    return $?
}

# 记录 错误消息到文件
function logging_backup_err() {
  echo "{dir:${1}_${backup_date} \
         date:${backup_date}}" >> $error_log
}

# 测试配置文件正确性
function test_conf_file() {
  # 判断每个变量是否在配置文件中有配置，没有则退出程序
  if [ ! -n "$user" ]; then echo 'fail: configure file user not set'; exit 2; fi
  if [ ! -n "$password" ]; then echo 'fail: configure file password not set'; exit 2; fi
  if [ ! -n "$mysql_conf_file" ]; then echo 'fail: configure file mysql_conf_file not set'; exit 2; fi
  if [ ! -n "$incr_backup_dir" ]; then echo 'fail: configure file incr_backup_dir not set'; exit 2; fi
  if [ ! -n "$error_log" ]; then echo 'fail: configure file error_log not set'; exit 2; fi
}

# 执行
function run() {
  # 检测配置文件值
  test_conf_file
  increment_backup
  completed_backup
  logging_backup_err
}

run