haproxy Mycat集2---KeepAlived

KA 配两台 MASTER,BACKUP节点  

 

安装Keepalived

一、下载安装依赖包

yum install -y wget make gcc openssl-devel popt-devel

二、下载、安装Keepalived

wget https://www.keepalived.org/software/keepalived-2.0.18.tar.gz tar zxvf keepalived-2.0.18

cd keepalived-2.0.18

 ./configure --prefix=/usr/local/keepalived 
 make 
 make install

三、安装成功后作成服务模式。

cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ cp /keepalived-2.0.18/keepalived/etc/init.d/keepalived  /etc/init.d

四、配置文件

mkdir -p /etc/keepalived/
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf chmod +x /etc/init.d/keepalived vi /etc/keepalived/keepalived.conf

global_defs {
    router_id LVS_DEVEL
}

vrrp_script chk_haproxy {
    script "/etc/keepalived/chk.sh" //检查haproxy的脚本 interval 2 //每两秒检查一次 } vrrp_instance VI_1 { state MASTER //定义为MASTER节点 nopreempt //开启不抢占 interface eth0 virtual_router_id 51 priority 100 //开启了不抢占，因此此处优先级必须高于另外一台 advert_int 1 authentication { auth_type PASS auth_pass abcd } virtual_ipaddress { 172.17.0.21 //配置VIP 当前DOCKER IP：172.17.0.20 }
    track_script {
        chk_haproxy //调用检查脚本
    }
 notify_backup "/etc/init.d/haproxy restart" //KA 启动Haproxy notify_fault "/etc/init.d/haproxy stop" }



5.chk.sh文件：

vi /etc/keepalived/chk.sh


#!/bin/bash
#
if [ $(ps -C haproxy --no-header | wc -l) -eq 0 ]; then
       /etc/init.d/keepalived stop
fi


chmod +x /etc/keepalived/chk.sh

service keepalived start

参考：https://www.cnblogs.com/tae44/p/4717334.html https://www.cnblogs.com/kgdxpr/p/3325788.html