程序流程图
程序结构
此程序包含了4个目录(bin、conf、log、var):
1、bin:存放运行备份的主脚本程序(*.sh)。
2、conf:存放着程序运行的配置文件变量(*.conf)。
3、log:存放的是备份时xtrabackup的输出内容(*.log)。
4、var:存放了索引文件(*.index)和错误记录文件(*.err)。
*.index:每当备份成功后都会记录一条信息到此文件中,此文件也是增量备份的一个基础文件,程序会用过此文件判断是增量备份还是全量备份。
*.err:每当备份出错了会记录一条数据到此文件。如果需要对备份成功与否进行监控,可以通过此文件的变化来判断是否备份成(文件无变化就是备份成功了)。
先决条件
确保你的xtrabackup 程序在机器上已经可以正确使用。
注意事项
为了安全请使用root以外的用户来使用本程序,本人专门使用了一个mysql用户来执行mysql相关的操作。
启动脚本方式(可以放在crontab定时任务)
#你的程序路径 /bin/bash /tmp/xtrabackup_cron/bin/mysql_increment_hot_backup.sh
程序内容展示
配置文件 mysql_increment_hot_backup.conf
# mysql 用户名 user=root # mysql 密码 password=root # 备份路劲 backup_dir=/tmp/backup # percona-xtrabackup 备份软件路径 xtrabackup_dir=/usr/local/percona-xtrabackup # 全备是在一周的第几天 full_backup_week_day=2 # 全量备信息名称 前缀 full_backup_prefix=full # 增量备信息名称 前缀 increment_prefix=incr # mysql配置文件 mysql_conf_file=/etc/my.cnf # 错误日志文件(更具此文件知道备份是否成功) # format: # {week_day:1,dir:full/incr_2015-12-29_00-00-00_7,type:full/incr,date:2015-12-30} error_log=mysql_increment_hot_backup.err # 索引文件 # format: # {week_day:1,dir:full/incr_2015-12-29_00-00-00_7,type:full/incr,date:2015-12-30} index_file=mysql_increment_hot_backup.index
主程序说明xtrabackup_cron/bin/mysql_increment_hot_backup.sh
#!/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="../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 backup_dir=`sed '/^backup_dir=/!d;s/.*=//' $conf_file` # percona-xtrabackup 备份软件路径 xtrabackup_dir=`sed '/^xtrabackup_dir=/!d;s/.*=//' $conf_file` # 全备是在一周的第几天 full_backup_week_day=`sed '/^full_backup_week_day=/!d;s/.*=//' $conf_file` # mysql 全备前缀标识 full_backup_prefix=`sed '/^full_backup_prefix=/!d;s/.*=//' $conf_file` # mysql 增量备前缀标识 increment_prefix=`sed '/^increment_prefix=/!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` # 备份索引文件 index_file=`sed '/^index_file=/!d;s/.*=//' $conf_file` # 备份日期 backup_date=`date +%F` # 备份日期 backup_time=`date +%H-%M-%S` # 备份日期 backup_week_day=`date +%u` # 创建相关目录 log_dir=../log var_dir=../var mkdir -p $backup_dir mkdir -p $log_dir mkdir -p $var_dir # 全量备份 function full_backup() { backup_folder=${full_backup_prefix}_${backup_date}_${backup_time}_${backup_week_day} mkdir -p $backup_dir/$backup_folder $xtrabackup_dir/bin/innobackupex \ --defaults-file=$mysql_conf_file \ --user=$user \ --password=$password \ --no-timestamp \ $backup_dir/$backup_folder > $log_dir/${backup_folder}.log 2>&1 return $? } # 增量备份 function increment_backup() { backup_folder=${increment_prefix}_${backup_date}_${backup_time}_${backup_week_day} incr_base_folder=`sed -n '$p' $index_file | \ awk -F '[, {}]*' '{print $3}' | \ awk -F ':' '{print $2}'` mkdir -p $backup_dir/$backup_folder $xtrabackup_dir/bin/innobackupex \ --defaults-file=$mysql_conf_file \ --user=$user \ --password=$password \ --no-timestamp \ --incremental \ $backup_dir/$backup_folder \ --incremental-basedir=$backup_dir/$incr_base_folder > $log_dir/${backup_folder}.log 2>&1 return $? } # 删除之前的备份(一般在全备完成后使用) function delete_before_backup() { cat $index_file | awk -F '[, {}]*' '{print $3}' | \ awk -v backup_dir=$backup_dir -F ':' '{if($2!=""){printf("rm -rf %s/%s\n", backup_dir, $2)}}' | \ /bin/bash cat $index_file | awk -F '[, {}]*' '{print $3}' | \ awk -v log_dir=$log_dir -F ':' '{if($2!=""){printf("rm -rf %s/%s.log\n", log_dir, $2)}}' | \ /bin/bash } # 备份索引文件 function backup_index_file() { cp $index_file ${index_file}_$(date -d "1 day ago" +%F) } # 备份索引文件 function send_index_file_to_remote() { echo 'send index file ok' } # 添加索引, 索引记录了当前最新的备份 function append_index_to_file() { echo "{week_day:$backup_week_day, \ dir:${1}_${backup_date}_${backup_time}_${backup_week_day}, \ type:${1}, \ date:${backup_date}}" >> $index_file } # 记录 错误消息到文件 function logging_backup_err() { echo "{week_day:$backup_week_day, \ dir:${1}_${backup_date}_${backup_time}_${backup_week_day}, \ type:${1}, \ date:${backup_date}}" >> $error_log } # 清空索引 function purge_index_from_file() { > $index_file } # 清空错误日志信息 function purge_err_log() { > $error_log } # 打包备份 function tar_backup_file() { echo "tar $1 ok" } # 发送备份到远程 function send_backup_to_remote() { echo "send $1 remote ok" } # 判断是应该全备还是增量备份 # 0:full, 1:incr function get_backup_type() { full_backup_week_day=`sed '/^full_backup_week_day=/!d;s/.*=//' $conf_file` backup_type=0 if [ "$full_backup_week_day" -eq `date +%u` ]; then backup_type=0 else backup_type=1 fi if [ ! -n "`cat $index_file`" ]; then backup_type=0 fi return $backup_type } # 测试配置文件正确性 function test_conf_file() { # 判断每个变量是否在配置文件中有配置,没有则退出程序 if [ ! -n "$user" ]; then echo 'fail: configure file user not set'; exit 2; fi if [ ! -n "$password" ]; then echo 'fail: configure file password not set'; exit 2; fi if [ ! -n "$backup_dir" ]; then echo 'fail: configure file backup_dir not set'; exit 2; fi if [ ! -n "$full_backup_week_day" ]; then echo 'fail: configure file full_backup_week_day not set'; exit 2; fi if [ ! -n "$full_backup_prefix" ]; then echo 'fail: configure file full_backup_prefix not set'; exit 2; fi if [ ! -n "$increment_prefix" ]; then echo 'fail: configure file increment_prefix not set'; exit 2; fi if [ ! -n "$mysql_conf_file" ]; then echo 'fail: configure file mysql_conf_file not set'; exit 2; fi if [ ! -n "$error_log" ]; then echo 'fail: configure file error_log not set'; exit 2; fi if [ ! -n "$index_file" ]; then echo 'fail: configure file index_file not set'; exit 2; fi } # 执行 function run() { # 检测配置文件值 test_conf_file # 判断是执行全备还是曾量备份 get_backup_type backup_type=$? case $backup_type in 0 ) # 全量备份 full_backup backup_ok=$? if [ 0 -eq "$backup_ok" ]; then # 全备成功 # # 打包最新备份 # tar_backup_file $full_backup_prefix # # 将tar备份发送到远程 # send_backup_to_remote $full_backup_prefix # 备份索引文件 backup_index_file # # 发送索引文件到远程 # send_index_file_to_remote # 清除之前的备份 delete_before_backup # 清除索引文件 purge_index_from_file # 添加索引, 索引记录了当前最新的备份 append_index_to_file $full_backup_prefix else # 全备失败 # 删除备份目录 rm -rf ${backup_dir}/${full_backup_prefix}_${backup_date}_${backup_time}_${backup_week_day} # 记录错误日志 logging_backup_err $full_backup_prefix fi ;; 1 ) # 增量备份 increment_backup backup_ok=$? if [ 0 -eq "$backup_ok" ]; then # 增量备份成功 # # 打包最新备份 # tar_backup_file $increment_prefix # # 将tar备份发送到远程 # send_backup_to_remote $increment_prefix # 添加索引, 索引记录了当前最新的备份 append_index_to_file $increment_prefix else # 增量备份失败 # 删除备份目录 rm -rf ${backup_dir}/${full_backup_prefix}_${backup_date}_${backup_time}_${backup_week_day} # 记录错误日志 logging_backup_err $increment_prefix fi ;; esac } run