LVS+KeepaLived+Nginx SSL（一）

 

LVS+KeepaLived+Nginx SSL验证

keepalived安装

yum  -y  install kernel-devel  openssl-*  ipvsadm
wget http://www.keepalived.org/software/keepalived-1.2.2.tar.gz
tar zxf keepalived-1.2.2.tar.gz
cd  keepalived-1.2.2
vim keepalived/libipvs-2.6/ip_vs.h

#将#include <linux/types.h>        /* For __beXX types in userland */移动到#include <sys/types.h>下面，以解决make时的报错问题

./configure ./configure --with-kernel-dir=/usr/src/kernels/2.6.18-274.18.1.el5-x86_64/
make && make install
#--with-kernel-dir编译选项 是为了增加IPVS支持

mkdir /etc/keepalived/
vim /etc/keepalived/keepalived.conf
#加入下面的内容
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 200
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.5.230
    }
}

virtual_server 192.168.5.230 443  {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    persistence_timeout 50
    protocol TCP

    real_server 192.168.5.202 443  {
        weight 3
        inhibit_on_failure
    TCP_CHECK {
            connect_timeout 10
            nb_get_retry 3
            delay_before_retry 3
            connect_port 443
        }
    }
    real_server 192.168.5.204 443  {
        weight 3
        inhibit_on_failure
    TCP_CHECK {
            connect_timeout 10
            nb_get_retry 3
            delay_before_retry 3
            connect_port 443
        }
    }
}
virtual_server 192.168.5.230 80  {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    inhibit_on_failure
    persistence_timeout 50
    protocol TCP

    real_server 192.168.5.202 80  {
        weight 3
        inhibit_on_failure
    TCP_CHECK {
            connect_timeout 10
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }
    real_server 192.168.5.204 80  {
        weight 3
        inhibit_on_failure
    TCP_CHECK {
            connect_timeout 10
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }
}

#然后用 keepalived 命令启动keepalived程序

 

state                     #keepalived的状态 有MASTER和SLAVE 两种
interface                 #实例绑定的网卡
virtual_router_id         #VRID
priority                  #优先级，即使state指定为MASTER但如果，priority低也有可能变成SLAVE（受到nopreempt影响）
advert_int                #设定检测间隔
authentication            #设定验证方式：auth_type，以及验证密码：auth_pass
virtual_ipaddress         #VIP，可以写多个，每个占一行

virtual_server            #指定virtual server 以及端口号
delay_loop                #对realserver的检测间隔时间
lb_algo                   #LVS的轮询算法
lb_kind                   #LVS的工作模式为DR
inhibit_on_failure        #当检测失效后将权重标记为0
persistence_timeout       #将50s内来自同一ip的请求转发到同一后端
protocol TCP              #使用的协议
real_server               #后端web配置字段
weight                    #权重，权重越高接收到的请求越多
TCP_CHECK                 #检测方式
connect_timeout           #连接超时时间
connect_port              #健康检测端口
nb_get_retry              #重连次数
delay_before_retry        #重连间隔时间

#启动成功后可以通过ipvsadm命令来查看

realserver 启动脚本：

 

#这个IP添加到网卡配置文件中也可以，我犯懒就直接拷贝了LT论坛中的脚本， 作者名字下面有写

#!/bin/bash
# description: Config realserver lo and apply noarp
#Written by :NetSeek http://www.linuxtone.org

SNS_VIP="192.168.5.230"

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

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

        exit 0