后端云

Load Balance(LVS实现方式)

网络拓扑图

网络拓扑图

配置vm网络

1 生成上图所示的虚拟机
2 设定各个VM的 网卡的配置文件
3 建两个网桥,如上图所示,并在网桥上绑定对应的网卡

网卡①

[root@localhost network-scripts]# cat ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.124.180
NETMASK=255.255.255.0

网卡②

[root@localhost network-scripts]# cat ifcfg-ens0
HWADDR="52:54:00:64:59:6D"
TYPE="Ethernet"
BOOTPROTO="static"
NAME="ens0"
UUID="bace60bc-e8d3-4269-9136-7fc507e8bbfb"
ONBOOT="yes"
IPADDR="192.168.124.185"
NETMASK="255.255.255.0"

网卡③

[root@localhost network-scripts]# cat ifcfg-ens1
HWADDR="52:54:00:4B:D1:62"
TYPE="Ethernet"
BOOTPROTO="static"
NAME="ens1"
UUID="ce9ffcff-aa00-42b4-a4b7-194d158afa5f"
ONBOOT="yes"
IPADDR="192.168.125.2"
NETMASK="255.255.255.0"

网卡④

[root@localhost network-scripts]# cat ifcfg-ens0
TYPE="Ethernet"
BOOTPROTO="static"
ONBOOT="yes"
IPADDR="192.168.125.3"
NETMASK="255.255.255.0"
GATEWAY="192.168.125.2"

网卡⑤

[root@localhost network-scripts]# cat ifcfg-ens0
TYPE="Ethernet"
BOOTPROTO="static"
ONBOOT="yes"
IPADDR="192.168.125.4"
NETMASK="255.255.255.0"
GATEWAY="192.168.125.2"

网卡⑥

[root@localhost network-scripts]# cat ifcfg-ens0
TYPE="Ethernet"
BOOTPROTO="static"
ONBOOT="yes"
IPADDR="192.168.125.5"
NETMASK="255.255.255.0"
GATEWAY="192.168.125.2"

安装LVS

[root@localhost ~]# yum install ipvsadm
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package ipvsadm.x86_64 0:1.27-4.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package          Arch            Version               Repository         Size
================================================================================
Installing:
 ipvsadm          x86_64          1.27-4.el7            c6-media           44 k

Transaction Summary
================================================================================
Install  1 Package

Total download size: 44 k
Installed size: 75 k
Is this ok [y/d/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : ipvsadm-1.27-4.el7.x86_64                                    1/1 
  Verifying  : ipvsadm-1.27-4.el7.x86_64                                    1/1 

Installed:
  ipvsadm.x86_64 0:1.27-4.el7                                                   

Complete!

设定

SSH VM:director

[root@localhost network-scripts]# ipvsadm -A -t 192.168.124.185:80 -s rr
[root@localhost network-scripts]# ipvsadm -a -t 192.168.124.185:80 -r 192.168.125.3:80 -m
[root@localhost network-scripts]# ipvsadm -a -t 192.168.124.185:80 -r 192.168.125.4:80 -m
[root@localhost network-scripts]# echo 1 > /proc/sys/net/ipv4/ip_forward
[root@localhost network-scripts]# systemctl stop firewalld.service
[root@localhost network-scripts]# setenforce 0

SSH VM:node3(4,5,…)

[root@localhost ~]# systemctl stop firewalld.service
[root@localhost ~]# setenforce 0
[root@localhost ~]# systemctl start httpd.service
[root@localhost ~]# echo node3(3,5,…)_html > /var/www/html/index.html
[root@localhost ~]# curl localhost
node3(4,5,…)_html

负载均衡结果确认

最后SSH VM:client发现负载被均匀的分发到各个node上

[root@localhost ~]# curl 192.168.124.185
node3_html
[root@localhost ~]# curl 192.168.124.185
node4_html
[root@localhost ~]# curl 192.168.124.185
node3_html
[root@localhost ~]# curl 192.168.124.185
node4_html

抓包截图

抓包截图

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