天天看点

Centos7-LVS集群-NAT配置

1.准备环境。

1)克隆 四台虚拟机 pc10, lvs20, web30,web40.

 分别设置好IP 192.168.4.10,192.168.4.20(192.168.2.20),192.168.2.30,192.168.2.40.

  10位客户机,20为转发和调度机,需设置两张网卡eth0和eth1,30和40为web服务器。

2)每台机器上的firewalld和selinux都关掉。

3)web30和40上都安装httpd 并开启服务:

 #yum -y install httpd

#systemctl start httpd

4)lvs20上打开IP转发:

# vim /etc/sysctl.conf

将以下内容添加进去

#net.ipv4.ip_forward = 1

安装ipvsadm:

#yum -y install ipvsadm

然后启动ipvsadm

#systemctl start ipvsadm

如果启动不成功可以执行以下命令:

#ipvsadm --save > /etc/sysconfig/ipvsadm

5)web30和web40上指定网关为192.168.2.20

route add default gw  192.168.2.20

Centos7-LVS集群-NAT配置

pc10上指定网关为192.168.4.20

Centos7-LVS集群-NAT配置

2. 配置ipvsadm

在lvs20上操作;

1)添加虚拟服务

[[email protected] ~]# ipvsadm -A -t 192.168.4.20:80 -s rr

[[email protected] ~]# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  192.168.4.20:80 rr

2)添加 realserver  web30&40

[[email protected] ~]# ipvsadm -a -t 192.168.4.20:80 -r 192.168.2.30:80 -m

[[email protected] ~]# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  192.168.4.20:80 rr

  -> 192.168.2.30:80              Masq    1      0          0     

[[email protected] ~]# ipvsadm -a -t 192.168.4.20:80 -r 192.168.2.40:80 -m

[[email protected] ~]# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  192.168.4.20:80 rr

  -> 192.168.2.30:80              Masq    1      0          0         

  -> 192.168.2.40:80              Masq    1      0          0  

3)保存策略

[[email protected] ~]# ipvsadm-save

-A -t 192.168.4.20:http -s rr

-a -t 192.168.4.20:http -r 192.168.2.30:http -m -w 1

-a -t 192.168.4.20:http -r 192.168.2.40:http -m -w 1

3.测试 ,pc10上进行测试

安装elinks

[[email protected] ~]# yum -y install elinks

使用elinks测试 lvs20分发效果

[[email protected] ~]# elinks --dump http://192.168.4.20/test.html

   web40

[[email protected] ~]# elinks --dump http://192.168.4.20/test.html

   web30

可以在分发机器上查看连接信息汇总

[[email protected] ~]# ipvsadm -Ln --stats

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port               Conns   InPkts  OutPkts  InBytes OutBytes

  -> RemoteAddress:Port

TCP  192.168.4.20:80                     8       48       33     3800     4332

  -> 192.168.2.30:80                     4       24       17     1900     2192

  -> 192.168.2.40:80                     4       24       16     1900     2140

改权重值: -e -w

[[email protected] ~]# ipvsadm -e -t 192.168.4.20:80 -r 192.168.2.40:80 -w 3

[[email protected] ~]# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  192.168.4.20:80 rr

  -> 192.168.2.30:80              Masq    1      0          0         

  -> 192.168.2.40:80              Route   3      0          0   

改调度算法: -E   -m NAT模式  -g DR模式   -i TUN模式

[[email protected] ~]# ipvsadm -E -t 192.168.4.20:80 -s wrr

删除realserver: -d

[[email protected] ~]# ipvsadm -d -t 192.168.4.20:80 -r 192.168.2.30:80

[[email protected] ~]# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  192.168.4.20:80 wrr

  -> 192.168.2.40:80              Route   3      0          0  

清空虚拟服务:  -C

[[email protected] ~]# ipvsadm -C

[[email protected] ~]# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

继续阅读