LVS+Keepalived+MysqlCluster搭建高可用的Mysql系统(实测可行)

LVS+Keepalived+mysqlCluster搭建高可用的Mysql系统(实测可行) 环境 CentOS7.0
-mysql-cluster-gpl-7.1.9a-linux-i686-glibc23.tar.gz keepalived-1.4.2.tar.gz 方案 类型 ip Management node 192.168.1.2 Data node 192.168.1.2 Data node 192.168.1.3 MASTER 192.168.1.11 BACKUP 192.168.1.13 BACKUP 192.168.1.14 SQL node(LVS节点) 192.168.1.3 SQL node(LVS节点) 192.168.1.4 安装MysqlCluster

在此不再赘述，安装详情见我的上一篇文章 MysqlCluster安装实测可行

安装keepalived 安装必要的插件(官网上要求的和一些必备的) - yum install curl gcc openssl-devel libnl3-devel net-snmp-devel - yum install -y libnfnetlink-devel（解决错误:configure: error: libnfnetlink headers missing） - yum install kernel-devel ipvsadm -y 安装 上传文件到/etc/local/,解压 tar -zxvf keepalived-1.4.2.tar.gz cd keepalived-1.4.2 ./configure prefix=/usr/local/keepalived(prefix：指定安装目录） make make install
-完成以上步骤 ，安装就完成了，目录结构如下：
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配置MASTER和BACKUP 在 /etc/keepalived创建keepalived.conf，文件内容如下： global_defs { router_id LVS_DEVEL } vrrp_instance VI_MYSQL_1 { state MASTER //(备机：BACKUP) interface ens33 virtual_router_id 55 priority 150 //(备机:100） advert_int 5 authentication { auth_type PASS auth_pass 010203 } virtual_ipaddress { 192.168.1.200 } } virtual_server 192.168.1.200 3306 { delay_loop 6 lb_algo rr lb_kind DR persistence_timeout 6 protocol TCP real_server 192.168.1.2 3306 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 3306 } } real_server 192.168.1.3 3306 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 3306 } } real_server 192.168.1.4 3306 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 3306 } }CKUP } 备机使用scp命令从主机拷贝 /etc/keepalived/keepalived.conf 192.168.1.14:/etc/keepalived/` 移动启动相关的文件 cp /usr/local/keepalived-1.4.2/keepalived/etc/init.d/keepalived /etc/init.d/ cp /usr/local/keepalived/sbin/keepalived /usr/sbin/ cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ 配置LVS节点

（这一步至关重要，不然VIP无法跟LVS节点建立连接，keealived运行正常，但是client就是连不上VIP）

vi /etc/rc.d/init.d/realserver.sh 文件内容如下：

SNS_VIP=192.168.1.200设定VIP，如果你的VIP不是该ip，请修改

#!/bin/bash # description: Config realserver lo and apply noarp SNS_VIP=192.168.1.200 /etc/rc.d/init.d/functions case "$1" in start) ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP /sbin/route add -host $SNS_VIP dev lo:0 echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce sysctl -p >/dev/null 2>&1 echo "RealServer Start OK" ;; stop) ifconfig lo:0 down route del $SNS_VIP >/dev/null 2>&1 echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce echo "RealServer Stoped" ;; *) echo "Usage: $0 {start|stop}" exit 1 esac exit 0 赋予该执行权限 1.chmod +x /etc/rc.d/init.d/functions 2.chmod +x /etc/rc.d/init.d/realserver.sh 启动 /etc/rc.d/init.d/realserver.sh start

ifconfig查看新增的虚拟ip

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启动keepalived 启动项在 cd /etc/init.d ./keealived start 查看日志文件
tail -f /var/log/message
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ipvsadm

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连接VIP

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ipvsadm -lc
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测试 当主机挂了，备机就会变成主机提供服务 当主机恢复后，备机将从主机回到备机状态 keepalived主机会监听LVS节点，当有SQL(LVS)挂点或上线，主机会第一时间与其建立联系或者断开连接 总结 配置LVS节点至关重要，务必配置。

LVS+keepalived+MysqlCluster实现了mysql的高可用性，高扩展。单MysqlCluster是无法完成这个任务的，keepalived实现了负载均衡，从而将高可用体现了出来。