# 网站架构优化

**Repository Path**: lingding0521/keepalived

## Basic Information

- **Project Name**: 网站架构优化
- **Description**: 利用lvs+keepalived分发流量，保持次集群的可用性
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2025-02-11
- **Last Updated**: 2025-02-11

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 网站架构优化

#### 介绍
利用lvs+keepalived保障集群的负载均衡和高可用性

#### 软件架构
lvs+keepalived+lamp或lnmp


#### 安装教程

1.环境
192.168.221.134 master
192.168.221.163 backup
192.168.221.166 web1
192.168.221.167 web2
2.在master和backup上安装配置Keepalived:

```
yum -y install keepalived ipvsadm
```

3.在master上修改配置文件

```
! Configuration File for keepalived
global_defs {						
	router_id Director1
	}
	
vrrp_instance VI_1 {				
	state MASTER	
	interface ens33
	virtual_router_id 51
	priority 150
	advert_int 1	
	authentication {
		auth_type PASS
		auth_pass 1111
		}
	virtual_ipaddress {
		192.168.221.20/24 dev ens33
		}
	}
	
virtual_server 192.168.221.20 80 {
	delay_loop 3
	lb_algo rr
	lb_kind DR
	protocol TCP
	real_server 192.168.221.166 80 {
		weight 1
		TCP_CHECK {
			connect_timeout 3
			}
		}
	real_server 192.168.221.167 80 {
		weight 1
		TCP_CHECK {
			connect_timeout 3
			}
		}
}

```
4.在backup上修改配置文件，修改router_id Director2，state BACKUP，priority 100

```
! Configuration File for keepalived
global_defs {						
	router_id Director2
	}
	
vrrp_instance VI_1 {				
	state BACKUP
	interface ens33
	virtual_router_id 51
	priority 100
	advert_int 1	
	authentication {
		auth_type PASS
		auth_pass 1111
		}
	virtual_ipaddress {
		192.168.221.20/24 dev ens33
		}
	}
	
virtual_server 192.168.221.20 80 {
	delay_loop 3
	lb_algo rr
	lb_kind DR
	protocol TCP
	real_server 192.168.221.166 80 {
		weight 1
		TCP_CHECK {
			connect_timeout 3
			}
		}
	real_server 192.168.221.167 80 {
		weight 1
		TCP_CHECK {
			connect_timeout 3
			}
		}
}
```
5.在master和backup上启动keepalived

```
systemctl start keepalived
systemctl enable keepalived
reboot
```
6.web服务器配置,在web1和web2上安装http

```
yum install -y httpd && systemctl start httpd && systemctl enable httpd
```
7.自定义web主页，以便观察负载均衡结果
web1
```
echo "1111111111" > /var/www/html/index.html
```
web2
```
echo "2222222222" > /var/www/html/index.html
```
8.配置虚拟地址

复制虚拟网卡配置文件
```
cp /etc/sysconfig/network-scripts/{ifcfg-lo,ifcfg-lo:0}
vim /etc/sysconfig/network-scripts/ifcfg-lo:0
```
修改配置文件
```
DEVICE=lo:0
IPADDR=192.168.221.20
NETMASK=255.255.255.255
ONBOOT=yes
```
9.配置路由

```
vim /etc/rc.local
```
```
/sbin/route add -host 192.168.221.20 dev lo:0
```
10.配置ARP

```
vim /etc/sysctl.conf
```
忽略arp请求可以回复
```
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.default.arp_ignore = 1
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2
```
重启
```
reboot
```
11.测试负载均衡
![输入图片说明](%E5%B1%8F%E5%B9%95%E6%88%AA%E5%9B%BE%202025-02-11%20094642.png)

12.关闭master的keepalived服务，测试高可用,发现虚拟ip：192.168.221.20从master转移到backup上

```
systemctl stop keepalived
```
![输入图片说明](%E5%B1%8F%E5%B9%95%E6%88%AA%E5%9B%BE%202025-02-11%20095400.png)
![输入图片说明](%E5%B1%8F%E5%B9%95%E6%88%AA%E5%9B%BE%202025-02-11%20095450.png)

再次测试负载均衡
![输入图片说明](%E5%B1%8F%E5%B9%95%E6%88%AA%E5%9B%BE%202025-02-11%20095853.png)
-------------到此keepalived+lvs负载均衡部署结束，后续可以在两个web服务器上部署web项目-------------