LVS+keepalived快速搭建测试环境
#LVS+keepalived快速搭建测试环境#centos6 X64# LVS 负载均衡模式：DR（直接路由）192.168.18.31 master(LVS)192.168.18.32 slave(LVS)192.168.18.18 VIP192.168.18.11 web1192.168.18.12 web2###################################手动配置测试###LVS 安装配置yum install ipvsadm -yrpm -ql ipvsadm# ipvsadm# lsmod|grep ip_vs#添加VIP/sbin/ifconfig eth1:1 192.168.18.18/24 up#ifconfig eth1:1 down #测试完后停止VIPipvsadm -C #清空#添加虚拟服务ipvsadm -A -t 192.168.18.18:80 -s wrr -p 20#添加后端服务ipvsadm -a -t 192.168.18.18:80 -r 192.168.18.11:80 -g -w 1ipvsadm -a -t 192.168.18.18:80 -r 192.168.18.12:80 -g -w 1#删除ipvsadm -d -t 192.168.18.18:80 -r 192.168.18.11:80ipvsadm -L -n #查看列表#############################################后端WEB配置# #安装Apache或nginx，启动服务# yum install httpd -y# echo “this is rs1” > /var/www/html/index.html# service httpd restartvim lvs-rs.sh#!/bin/bash# 配置VIP、配置ARP抑制VIP=192.168.18.18. /etc/rc.d/init.d/functionscase "$1" instart) echo " start LVS of REALServer" /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up /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 ;;stop) /sbin/ifconfig lo:0 down echo "close LVS Directorserver" 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 "Usage: $0 {start|stop}" exit 1esac exit 0#给脚本加权限，并执行chmod +x lvs-rs.shchmod 755 /etc/rc.d/init.d/functions ./lvs-rs.sh start###################################LVS+keepalived 配置yum install keepalived -y#rpm -ql keepalived#分别安装配置keepalivedcp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bakvim /etc/keepalived/keepalived.conf/etc/init.d/keepalived restart/etc/init.d/keepalived stop #关闭、开启LVS_MASTER测试ip add #查看VIP#配置如下：#####keepalived配置! Configuration File forkeepalivedglobal_defs { # notification_email { # test@sina.com #故障接受联系人 # } # notification_email_from admin@test.com #故障发送人 # smtp_server 127.0.0.1 #本机发送邮件 # smtp_connect_timeout 30 router_id LVS_MASTER #router_id LVS_BACKUP #LVS_BACKUP}vrrp_instance VI_1 { state MASTER #state BACKUP interface eth1 virtual_router_id 18 #虚拟路由标识，主从相同 priority 100 #priority 90 #BACKUP advert_int 1 authentication { auth_type PASS auth_pass 1111 #主从认证密码必须一致 } virtual_ipaddress { #Web虚拟IP（VTP） 192.168.18.18/24 }} ###real_server###virtual_server 192.168.18.18 80 { #定义虚拟IP和端口 delay_loop 6 #检查真实服务器时间，单位秒 lb_algo rr #设置负载调度算法，rr为轮训 lb_kind DR #设置LVS负载均衡DR模式 persistence_timeout 30 #同一IP的连接30秒内被分配到同一台真实服务器 protocol TCP #使用TCP协议检查realserver状态 real_server 192.168.18.11 80 { #第一个web服务器 weight 3 #节点权重值 TCP_CHECK { #健康检查方式 connect_timeout 3 #连接超时 nb_get_retry 3 #重试次数 delay_before_retry 3 #重试间隔/S } } real_server 192.168.18.12 80 { #第二个web服务器 weight 3 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } }#####keepalived配置##curl http://192.168.18.18 >/tmp/null #http访问测试tail -10 /var/log/nginx/access.log #查看nginx日志tail -10 /etc/httpd/logs/access_log #查看Apache日志
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