7月5日任務

時間 2019-11-24

標籤 7月 5日任務简体版

原文原文鏈接

DR模式搭建

1、html

• dir上編寫腳本 vim /usr/local/sbin/lvs_dr.sh //內容以下linux

#! /bin/bashnginx

echo 1 > /proc/sys/net/ipv4/ip_forwardgit

ipv=/usr/sbin/ipvsadm算法

vip=192.168.133.200vim

rs1=192.168.133.132瀏覽器

rs2=192.168.133.133bash

#注意這裏的網卡名字服務器

ifconfig ens33:2 $vip broadcast $vip netmask 255.255.255.255 upcurl

route add -host $vip dev ens33:2

$ipv -C

$ipv -A -t $vip:80 -s wrr

$ipv -a -t $vip:80 -r $rs1:80 -g -w 1

$ipv -a -t $vip:80 -r $rs2:80 -g -w 1

2、

• 兩臺rs上也編寫腳本 vim /usr/local/sbin/lvs_rs.sh//內容以下

#/bin/bash

vip=192.168.133.200

#把vip綁定在lo上，是爲了實現rs直接把結果返回給客戶端

ifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 up

route add -host $vip lo:0

#如下操做爲更改arp內核參數，目的是爲了讓rs順利發送mac地址給客戶端

#參考文檔www.cnblogs.com/lgfeng/archive/2012/10/16/2726308.html

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

• 分別在dir上和兩個rs上執行這些腳本

• 測試

實例：

[root@localhosts 01]# vim /usr/local/sbin/lvs_dr.sh 
#! /bin/bash

echo 1 > /proc/sys/net/ipv4/ip_forward

ipv=/usr/sbin/ipvsadm

vip=192.168.133.200

rs1=192.168.133.132

rs2=192.168.133.133

#注意這裏的網卡名字
ifdown ens33
ifup ens33
ifconfig ens33:2 $vip broadcast $vip netmask 255.255.255.255 up

route add -host $vip dev ens33:2

$ipv -C

$ipv -A -t $vip:80 -s rr

$ipv -a -t $vip:80 -r $rs1:80 -g -w 1

$ipv -a -t $vip:80 -r $rs2:80 -g -w 1


[root@localhosts 01]#  sh /usr/local/sbin/lvs_dr.sh 


在兩臺rs上面操做
[root@localhosts 02]# vim /usr/local/sbin/lvs_rs.sh
#/bin/bash

vip=192.168.133.200

#把vip綁定在lo上，是爲了實現rs直接把結果返回給客戶端

ifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 up

route add -host $vip lo:0

#如下操做爲更改arp內核參數，目的是爲了讓rs順利發送mac地址給客戶端

#參考文檔www.cnblogs.com/lgfeng/archive/2012/10/16/2726308.html

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


[root@localhosts 02]# vim /usr/local/sbin/lvs_rs.sh
#/bin/bash

vip=192.168.133.200

#把vip綁定在lo上，是爲了實現rs直接把結果返回給客戶端
ifdown lo
ifup lo
ifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 up

route add -host $vip lo:0

#如下操做爲更改arp內核參數，目的是爲了讓rs順利發送mac地址給客戶端

#參考文檔www.cnblogs.com/lgfeng/archive/2012/10/16/2726308.html

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


[root@localhosts 02]# sh /usr/local/sbin/lvs_rs.sh


[root@localhosts 03]# vim /usr/local/sbin/lvs_dr.sh
#/bin/bash

vip=192.168.133.200

#把vip綁定在lo上，是爲了實現rs直接把結果返回給客戶端

ifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 up

route add -host $vip lo:0

#如下操做爲更改arp內核參數，目的是爲了讓rs順利發送mac地址給客戶端

#參考文檔www.cnblogs.com/lgfeng/archive/2012/10/16/2726308.html

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


[root@localhosts 03]# sh /usr/local/sbin/lvs_dr.sh


在全部的機器上面操做，查看是否有192.168.133.200，IP地址
[root@localhosts ]# route -n

[root@localhosts ]# ip add


[root@localhosts ]# iptables -t nat -F
[root@localhosts ]# curl http：//192.168.133.200/
[root@localhosts ]#

[root@localhosts 01]# ipvsadm -ln

測試

在瀏覽器裏面輸入：192.168.133.200

Keepalived+LVS DR

• 編輯keepalived配置文件 vim /etc/keepalived/keepalived.conf//內容請到https://coding.net/u/aminglinux/p/aminglinux-book/git/blob/master/D21Z/lvs_keepalived.conf 獲取

• 須要更改裏面的ip信息

• 執行ipvsadm -C 把以前的ipvsadm規則清空掉

• systemctl restart network 能夠把以前的vip清空掉

• 兩臺rs上，依然要執行/usr/local/sbin/lvs_rs.sh腳本

• keepalived有一個比較好的功能，能夠在一臺rs宕機時，再也不把請求轉發過去

• 測試

實例：

[root@localhosts 03]# systemctl stop nginx                   #關閉nginx 
而後在瀏覽器刷新頁面，發現頁面刷新不了
[root@localhosts 03]# ps aux | grep nginx 


[root@localhosts 01]# ipvsadm  -ln



[root@localhosts 01]# vi /etc/keepalived/keepalived.conf        #把裏面的東西清空以後複製，下面的內容
vrrp_instance VI_1 {
    #備用服務器上爲 BACKUP
    state MASTER
    #綁定vip的網卡爲ens33，你的網卡和阿銘的可能不同，這裏須要你改一下
    interface ens33
    virtual_router_id 51
    #備用服務器上爲90
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass aminglinux
    }
    virtual_ipaddress {
        192.168.133.200
    }
}
virtual_server 192.168.133.200 80 {
    #(每隔10秒查詢realserver狀態)
    delay_loop 10
    #(lvs 算法)
    lb_algo wlc
    #(DR模式)
    lb_kind DR
    #(同一IP的鏈接60秒內被分配到同一臺realserver)
    persistence_timeout 60
    #(用TCP協議檢查realserver狀態)
    protocol TCP

    real_server 192.168.133.132 80 {
        #(權重)
        weight 100
        TCP_CHECK {
        #(10秒無響應超時)
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
    real_server 192.168.133.133 80 {
        weight 100
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
     }
}


[root@localhosts 01]# systemctl start keepalived             #開啓 keepalived 

[root@localhosts 01]# ps aux | grep keep
[root@localhosts 01]# ip add
[root@localhosts 01]# ipvsadm -ln
[root@localhosts 01]# ip add

[root@localhosts 01]# systemctl stop keepalived                   #關閉 keepalived 

[root@localhosts 03]# systemctl start nginx

[root@localhosts 01]# ipvsadm -ln
[root@localhosts 01]# systemctl start keepalived                   #開啓 keepalived 
[root@localhosts 01]# ipvsadm -ln

擴展 haproxy+keepalived http://blog.csdn.net/xrt95050/article/details/40926255 nginx、lvs、haproxy比較 http://www.csdn.net/article/2014-07-24/2820837