LVS搭建

LVS集群搭建

NAT架构图

1、在RS188，RS189操作

#安装httpd服务
[root@t1 ~]# yum install -y httpd
[root@t1 ~]# echo "I am RealServer1 192.168.47.188^C> /var/www/html/index.html
[root@t1 ~]# systemctl restart httpd
[root@t1 ~]# curl 192.168.47.188
”I am RealServer1 192.168.47.188”
#设置GW
[root@t1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR=192.168.47.188
GATEWAY=192.168.47.191  #设置为DIP
DNS1=114.114.114.114
DEFROUTE=yes
NAME=ens33
DEVICE=ens33
ONBOOT=yes

2、LVS服务器操作

#增加一块网卡，设置为仅主机模式（设置VIP）
[root@lvs network-scripts]#  cat /etc/sysconfig/network-scripts/ifcfg-ens37
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR=172.168.100.100
GATEWAY=192.168.47.2
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
DNS1=8.8.8.8
NAME=ens37
DEVICE=ens37
ONBOOT=yes
[root@lvs network-scripts]# hostname -I
192.168.47.191 172.168.100.100 
# director服务器上开启路由转发功能:
echo 1 > /proc/sys/net/ipv4/ip_forward
# 关闭 icmp 的重定向
echo 0 > /proc/sys/net/ipv4/conf/all/send_redirects
echo 0 > /proc/sys/net/ipv4/conf/default/send_redirects
echo 0 > /proc/sys/net/ipv4/conf/eth0/send_redirects
echo 0 > /proc/sys/net/ipv4/conf/eth1/send_redirects
#添加配置集群服务
ipvsadm -A -t 172.168.100.100:80 -s rr  #定义一个集群服务
ipvsadm -a -t 172.168.100.100:80 -r 192.168.47.188 -m #添加RealServer并指派调度算法为NAT
ipvsadm -a -t 172.168.100.100:80 -r 192.168.47.189 -m #添加RealServer并指派调度算法为NAT
[root@lvs ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  172.168.100.100:80 rr
  -> 192.168.47.188:80            Masq    1      0          0         
  -> 192.168.47.189:80            Masq    1      0          0  

3、验证

#在client添加一块新网卡设置仅主机模式、与VIP同一个网段
[root@lvs network-scripts]#  cat /etc/sysconfig/network-scripts/ifcfg-ens37
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR=172.168.100.99
GATEWAY=192.168.47.2
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
DNS1=8.8.8.8
NAME=ens37
DEVICE=ens37
ONBOOT=yes
#访问VIP
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.188” 
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.189”
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.188”
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.189”
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.188”
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.189”
##可以看到轮询效果

DR模式架构图

1、在RS上

#安装httpd服务
[root@t1 ~]# yum install -y httpd
[root@t1 ~]# echo "I am RealServer1 192.168.47.188^C> /var/www/html/index.html
[root@t1 ~]# systemctl restart httpd
[root@t1 ~]# curl 192.168.47.188
”I am RealServer1 192.168.47.188”
​
#设置GW
[root@t1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR=192.168.47.188
GATEWAY=192.168.47.192 #指向router 
DNS1=114.114.114.114
DEFROUTE=yes
NAME=ens33
DEVICE=ens33
ONBOOT=yes
​
#增加环回地址
ifconfig lo:0 172.168.100.100 netmask 255.255.255.255
​
#抑制ARP
[root@t1 ~]# echo "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore    
[root@t1 ~]# echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce
[root@t1 ~]# echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
[root@t1 ~]# echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce
t2的配置和t1相同

2、router上

#新增一块仅主机模式的网卡、网段跟VIP在同一个网段
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR=192.168.47.192
GATEWAY=172.168.100.100
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
DNS1=8.8.8.8
NAME=ens33
DEVICE=ens33
ONBOOT=yes
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens37
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR=172.168.100.101
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
DNS1=8.8.8.8
NAME=ens37
DEVICE=ens37
ONBOOT=yes

3、lvs服务器上

[root@lvs ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR=192.168.47.191
GATEWAY=192.168.47.2
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
DNS1=8.8.8.8
NAME=ens33
UUID=ffbcde5d-0940-492d-b58f-73fb6b6ee6a1
DEVICE=ens33
ONBOOT=yes
​
#增加一块lo网卡
ifconfig lo:1 172.168.100.100/32
​
#增加集群服务器
ipvsadm -A -t 172.168.100.100:80 -s wrr 
ipvsadm -a -t 172.168.100.100:80 -r 192.168.47.188 -g
ipvsadm -a -t 172.168.100.100:80 -r 192.168.47.189 -g
#查看
[root@lvs ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  172.168.100.100:80 wrr
  -> 192.168.47.188:80            Route   1      0          0         
  -> 192.168.47.189:80            Route   1      0          0  

4、验证

#在client上
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.189”
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.188”
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.189”
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.188”
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.189”
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.188”
[root@t3 ~]# curl 172.168.100.100
”I am RealServer1 192.168.47.189”
##搭建完成