/etc/my.cnf
read_only=on
启动项加入 –relay-log-purge=off
/etc/systemd/system/mysql.service
|
# Simple MySQL systemd service file # # systemd supports lots of fancy features, look here (and linked docs) for a full list: # http://www.freedesktop.org/software/systemd/man/systemd.exec.html # # Note: this file ( /usr/lib/systemd/system/mysql.service ) # will be overwritten on package upgrade, please copy the file to # # /etc/systemd/system/mysql.service # # to make needed changes. # # systemd-delta can be used to check differences between the two mysql.service files. # [Unit] Description=MySQL Community Server After=network.target After=syslog.target [Install] WantedBy=multi-user.target Alias=mysql.service [Service] User=mysql Group=mysql # Execute pre and post scripts as root PermissionsStartOnly=true # Needed to create system tables etc. #ExecStartPre=/usr/bin/mysql-systemd-start pre # Start main service ExecStart=/usr/local/mysql/bin/mysqld_safe –relay-log-purge=0 # Don’t signal startup success before a ping works #ExecStartPost=/usr/bin/mysql-systemd-start post # Give up if ping don’t get an answer TimeoutSec=600 Restart=always PrivateTmp=false |
不自动清理relay log 用作业的方式清理
清理时调用 mha_node 工具 purge_relay_logs
cat purge_relay_log.sh
#!/bin/bash
user=root
passwd=123456
port=3306
log_dir=’/data/masterha/log’
work_dir=’/data’
purge=’/usr/local/bin/purge_relay_logs’
if [ ! -d $log_dir ]
then
mkdir $log_dir -p
fi
$purge –user=$user –password=$passwd –disable_relay_log_purge –port=$port –workdir=$work_dir >> $log_dir/purge_relay_logs.log 2>&1
