LVS DR模型实战
本节我们将搭建一个 LVS-DR 的负载均衡集群。
1. 网络拓扑结构
拓扑结构说明:
- VS， RS1， RS2 在虚拟机内均采用桥接方式，桥接到物理机的网卡上
- VIP 配置在 DIP 所在网卡的别名上
2. lvs-dr 配置示例
2.1 RS 配置脚本
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#!/bin/bash
vip="192.168.1.99"
case $1 in
start)
echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
iptables -F
ifconfig lo:0 $vip netmask 255.255.255.255 broadcast $vip up
route add -host $vip dev lo:0
;;
stop)
ifconfig lo:0 down
echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce
;;
*)
echo "Usage $(basename $0) start|stop"
exit 1
;;
esac
echo "/proc/sys/net/ipv4/conf/all/arp_ignore:" `cat /proc/sys/net/ipv4/conf/all/arp_ignore`
echo "/proc/sys/net/ipv4/conf/lo/arp_ignore:" `cat /proc/sys/net/ipv4/conf/lo/arp_ignore`
echo "/proc/sys/net/ipv4/conf/all/arp_announce:" `cat /proc/sys/net/ipv4/conf/all/arp_announce`
echo "/proc/sys/net/ipv4/conf/lo/arp_announce:" `cat /proc/sys/net/ipv4/conf/all/arp_announce`
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2.2 VS 配置脚本
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#!/bin/bash
vip="192.168.1.99"
ifc="enp0s3:0"
port=80
rs1="192.168.1.107"
rs2="192.168.1.109"
case $1 in
start)
ifconfig $ifc $vip netmask 255.255.255.255 broadcast $vip up
iptables -F
ipvsadm -A -t $vip:$port -s wrr
ipvsadm -a -t $vip:$port -r $rs1 -g -w 1
ipvsadm -a -t $vip:$port -r $rs2 -g -w 1
;;
stop)
ipvsadm -C
ifconfig $ifc down
;;
*)
echo "Usage $(basename $0) start|stop"
exit 1
;;
esac
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