centos8平台mysql日志的按天切分

一,mysqladmin使用flush-logs的文档:

mysql8官网上面针对mysqladmin的文档地址

https://dev.mysql.com/doc/refman/8.0/en/mysqladmin.html

内容:

flush-logs [log_type ...]

Flush all logs.

The mysqladmin flush-logs command permits optional log types to be given, to specify which logs to flush. Following the flush-logs command,
you can provide a space-separated list of one or more of the following log types: binary, engine, error, general, relay, slow.
These correspond to the log types that can be specified for the FLUSH LOGS SQL statement.

说明: flush-logs 加 error binary slow 等参数,这个功能点是在mysql5.7版本后才增加的,

         更低版本的mysql应该不支持这个参数,一定要注意

说明:刘宏缔的架构森林是一个专注架构的博客,地址:https://www.cnblogs.com/architectforest

         对应的源码可以访问这里获取: https://github.com/liuhongdi/

 说明:作者:刘宏缔 邮箱: 371125307@qq.com

二,创建日志分割后目录

[root@yjweb logs]$ mkdir mysqllogsbackup

三,编写脚本

[root@yjweb crontab]# vi split_mysql_logs.sh

内容:

#!/bin/bash
# 备份mysql的日志

# 昨天的日期
file_date=$(date -d"1 day ago" +"%Y%m%d")
echo ${file_date}

#mysql log的路径
log_path_mysql=/data/mysql/log

#日志分割后的路径
back_base=/data/logs/mysqllogsbackup
user="root"
passwd="demopass"

# ===================backup dir name========================

date_year=$(date -d"1 day ago" +"%Y")
date_month=$(date -d"1 day ago" +"%m")
date_day=$(date -d"1 day ago" +"%d")
back_path=${back_base}/${date_year}/${date_month}/${date_day}
echo ${back_path}

# ===================mkdir back_path========================

if [ -d ${back_path} ];then
        echo 目录已经存在,不能重复创建
else
        mkdir -p ${back_path}
fi

# =================== 备份mysql log ========================

cd ${log_path_mysql}
for file in $(ls *log);
do
    mv ${file} ${back_path}/${file_date}_${file}
done

/usr/local/soft/mysql/bin/mysqladmin -u$user -p$passwd  --socket=/data/mysql/var/mysql.sock flush-logs slow error

说明:我们针对两个日志做切分,一个是慢查询日志,一个是错误日志

不建议针对二进制日志即binlog做切分

四,编写完成后添加可执行属性,并加入到crond

[root@yjweb crontab]# chmod +x split_mysql_logs.sh
[root@yjweb log]# crontab -e

增加一行

15 0 * * * sh /data/web/crontab/split_mysql_logs.sh >> /data/logs/cronlogs/splitmysqllogs.log 2>&1 

查看效果:

[root@yjweb log]# crontab -l | grep mysql
15 0 * * * sh /data/web/crontab/split_mysql_logs.sh >> /data/logs/cronlogs/splitmysqllogs.log 2>&1

五,查看日志分割的效果:

[root@yjweb log]# ll /data/logs/mysqllogsbackup/2020/03/10/
total 48
-rw-r--r-- 1 mysql mysql 42444 Mar 11 16:52 20200310_mysqld.log
-rw-r----- 1 mysql mysql  1184 Mar 11 17:22 20200310_mysql-slow.log

六,查看当前centos服务器版本

[root@yjweb ~]# cat /etc/redhat-release
CentOS Linux release 8.0.1905 (Core) 
原文地址:https://www.cnblogs.com/architectforest/p/12467745.html