采用MySQL-MMM做DB高可用时，遇到的一个小坑

一、服务器分布二、MySQL-MMM配置(1)、公共配置【所有DB节点：Master1、Master2、Slave1、Slave2Monitor节点】#vim/etc/mysql-mmm/mmm_common.confactive_master

一、服务器分布

二、MySQL-MMM 配置

(1)、公共配置【所有DB节点：Master1、Master2、Slave1、Slave2 Monitor节点】

# vim /etc/mysql-mmm/mmm_common.conf

active_master_role writer cluster_interface eth1 pid_path /var/run/mmm_agentd.pid bin_path /usr/lib/mysql-mmm/ replication_user repl replication_password repl123456 agent_user mmm_agent agent_password 123456 ip 10.222.5.10 mode master peer db2 ip 10.222.5.225 mode master peer db1 ip 172.23.155.22 mode slave ip 172.24.18.68 mode slave hosts db1,db2 ips 10.222.5.224 mode exclusive

# vim/etc/mysql-mmm/mmm_agent.conf

include mmm_common.conf this db1

# vim/etc/mysql-mmm/mmm_agent.conf

include mmm_common.conf this db2

# vim/etc/mysql-mmm/mmm_agent.conf

include mmm_common.conf this db3

# vim/etc/mysql-mmm/mmm_agent.conf

include mmm_common.conf this db4

(3)、Monitor节点

# vim /etc/mysql-mmm/mmm_mon.conf

include mmm_common.conf ip 10.137.23.103 pid_path /var/run/mmm_mond.pid bin_path /usr/lib/mysql-mmm/ status_path /var/lib/misc/mmm_mond.status ping_ips 10.222.5.10, 10.222.5.225,172.23.155.22,172.24.18.68 auto_set_online 10 monitor_user mmm_monitor monitor_password 123456 debug 0

# vim /data/scripts/refresh_vip.sh

#!/bin/sh PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin MMM_COMM_CONF="/etc/mysql-mmm/mmm_common.conf" ETH_NAME=`awk '/cluster_interface/{print $2}' ${MMM_COMM_CONF}` VIP_ADDR=`grep -A 2 '' ${MMM_COMM_CONF} | awk '/ips/{print $2}'` GETWAY_ADDR=`/sbin/route | awk '/default/ {print $2}'` if [[ -n `/sbin/ip addr show ${ETH_NAME} | grep ${VIP_ADDR}` ]]; then /sbin/arping -I ${ETH_NAME} -c 3 -s ${VIP_ADDR} ${GETWAY_ADDR} >/dev/null 2>&1 fi

* * * * * sleep 10; /data/scripts/refresh_vip.sh >/dev/null 2>&1

* * * * * sleep 20; /data/scripts/refresh_vip.sh >/dev/null 2>&1

* * * * * sleep 30; /data/scripts/refresh_vip.sh >/dev/null 2>&1

* * * * * sleep 40; /data/scripts/refresh_vip.sh >/dev/null 2>&1

* * * * * sleep 50; /data/scripts/refresh_vip.sh >/dev/null 2>&1

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