LVS+keepalived快速搭建测试环境

#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 VIP

192.168.18.11 web1

192.168.18.12 web2

##################################

#手动配置测试

###LVS 安装配置

yum  install ipvsadm -y

rpm -ql ipvsadm

# ipvsadm

# lsmod|grep ip_vs

#添加VIP

/sbin/ifconfig eth1: 192.168.18.18/ up

#ifconfig eth1: down #测试完后停止VIP

ipvsadm -C #清空

#添加虚拟服务

ipvsadm -A -t 192.168.18.18: -s wrr -p

#添加后端服务

ipvsadm -a -t 192.168.18.18: -r 192.168.18.11: -g -w

ipvsadm -a -t 192.168.18.18: -r 192.168.18.12: -g -w

#删除ipvsadm -d -t 192.168.18.18: -r 192.168.18.11:

ipvsadm -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 restart

vim lvs-rs.sh

#!/bin/bash

# 配置VIP、配置ARP抑制

VIP=192.168.18.18

. /etc/rc.d/init.d/functions

case "$1" in

start)

    echo " start LVS of REALServer"

    /sbin/ifconfig lo: $VIP broadcast $VIP netmask 255.255.255.255 up

    /sbin/route add -host $VIP dev lo:

    echo "" >/proc/sys/net/ipv4/conf/lo/arp_ignore

    echo "" >/proc/sys/net/ipv4/conf/lo/arp_announce

    echo "" >/proc/sys/net/ipv4/conf/all/arp_ignore

    echo "" >/proc/sys/net/ipv4/conf/all/arp_announce

    sysctl -p >/dev/null >&

    ;;

stop)

    /sbin/ifconfig lo: down

    echo "close LVS Directorserver"

    echo "" >/proc/sys/net/ipv4/conf/lo/arp_ignore

    echo "" >/proc/sys/net/ipv4/conf/lo/arp_announce

    echo "" >/proc/sys/net/ipv4/conf/all/arp_ignore

    echo "" >/proc/sys/net/ipv4/conf/all/arp_announce

    ;;

*)

    echo "Usage: $0 {start|stop}"

    exit

esac

exit

#给脚本加权限，并执行

chmod +x lvs-rs.sh

chmod  /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keepalived

cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak

vim /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 forkeepalived

global_defs {

    # notification_email {

        # [email protected]    #故障接受联系人

    # }

    # notification_email_from [email protected]  #故障发送人

    # smtp_server 127.0.0.1   #本机发送邮件

    # smtp_connect_timeout

    router_id LVS_MASTER

    #router_id LVS_BACKUP #LVS_BACKUP

}

vrrp_instance VI_1 {

    state MASTER

    #state BACKUP

    interface eth1

    virtual_router_id   #虚拟路由标识，主从相同

    priority

    #priority   #BACKUP

    advert_int

    authentication {

        auth_type PASS

        auth_pass   #主从认证密码必须一致

    }

    virtual_ipaddress {    #Web虚拟IP（VTP）

        192.168.18.18/

    }

}

###real_server###

virtual_server 192.168.18.18  { #定义虚拟IP和端口

    delay_loop     #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  #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  {  #第一个web服务器

        weight           #节点权重值

        TCP_CHECK {      #健康检查方式

            connect_timeout  #连接超时

            nb_get_retry     #重试次数

            delay_before_retry   #重试间隔/S

        }

    }

    real_server 192.168.18.12  {  #第二个web服务器

        weight

        TCP_CHECK {

            connect_timeout

            nb_get_retry

            delay_before_retry

        }

    }

}

#####keepalived配置

##

curl http://192.168.18.18 >/tmp/null #http访问测试

tail - /var/log/nginx/access.log #查看nginx日志

tail - /etc/httpd/logs/access_log #查看Apache日志