快速搭建lvs + keepalived + nginx

 

环境：

 

VIP         192.168.2.224

LVS        192.168.2.217     centos7

nginx1    192.168.2.231     centos6

nginx2    192.168.2.194     centos6

 

LVS原理：

国内的看得懂，哈哈  http://www.linuxvirtualserver.org/zh/lvs1.html

 

一、LVS节点需做的

 

1、安装ipvsadm，keepalived

yum -y install keepalived ipvsadm
yum install net-tools

 

2、修改配置keepalived的配置文件

global_defs {
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state MASTER
    interface eno16777736
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.2.224
    }
}

virtual_server 192.168.2.231 80 {
    delay_loop 6
    lb_algo rr
    lb_kind NAT
    protocol TCP

    real_server 192.168.2.194 80 {
        weight 1
        SSL_GET {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
    
    real_server 192.168.2.231 80 {
        weight 1
        SSL_GET {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

 

3、启动keepalived

 

systemctl start keepalived

 

4、执行下面这个脚本

#!/bin/bash
VIP=192.168.2.224
RIP1=192.168.2.231
RIP2=192.168.2.194
case "$1" in
start)
        ipvsadm --save > /etc/sysconfig/ipvsadm
        systemctl start ipvsadm
        ifconfig eno16777736:0 $VIP broadcast $VIP netmask 255.255.255.255 broadcast $VIP up
        route add -host $VIP dev eno16777736:0
        ipvsadm -A -t $VIP:80 -s rr
        ipvsadm -a -t $VIP:80 -r $RIP1:80 -g
        ipvsadm -a -t $VIP:80 -r $RIP2:80 -g
        echo "ipvsadm starting --------------------[ok]"
        ;;
stop)
        ipvsadm -C
        systemctl stop ipvsadm
        ifconfig eno16777736:0 down
        route del $VIP
        echo "ipvsamd stoped----------------------[ok]"
         ;;
status)
        if [ ! -e /var/lock/subsys/ipvsadm ];then
        echo "ipvsadm stoped---------------"
        exit 1
                else
                echo "ipvsamd Runing ---------[ok]"
        fi
        ;;
*)

echo "Usage: $0 {start|stop|status}"
exit 1
esac
exit 0

 

二、web节点需做的

 

1、先在两台nginx上把nginx装好，通过本机IP访问能区别两台机器，方便后面的测试，我这的nginx直接用的yum安装

 

 

 

 

2、分别在两台机器上执行如下脚本

 

#!/bin/bash
VIP=192.168.2.224

case "$1" in
    start)
        ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP 
        /sbin/route add -host $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 $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 Stopd"
        ;;
    *)
        echo "Usage: $0 {start|stop}"
        exit 1
esac

exit 0

 

三、测试

 

这里的测试要在非lvs，nginx机器上测试，也就是与这些无关的机器上测试

 

 

原文地址：https://www.cnblogs.com/lemon-le/p/9264581.html