负载均衡-2

根据URL中的目录地址实现代理转发

需求说明

当用户请求 www.will.com/upload/x 地址时，实现由上传服务器池（upload_pools）处理请求；

当用户请求 www.will.com/static/x 地址时，实现由静态服务器池（static_pools）处理请求；

除此以外，对于其它访问请求全部由默认动态服务器池（default_pools）处理请求。

需求图示

动静分离网站集群架构

所需服务器列表

服务器ip	主机名	用途
192.168.1.15	lb01	nginx 负载均衡 （此实验中需要进行配置）
192.168.1.17	web01	nginx web static （假设已提前配置好）
192.168.1.18	web02	nginx web upload （假设已提前配置好）
192.168.1.19	web03	nginx web default dynamic （假设已提前配置好）
192.168.1.61	m01	管理机，局域网本地yum源（假设已提前配置好）

以下操作均在 lb01 上完成

nginx.conf 配置文件内容 （cat /etc/nginx/nginx.conf）

worker_processes  1;
events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    
    upstream static_pools {
        server 192.168.1.17:80 weight=1;
    }
    
    upstream upload_pools {
        server 192.168.1.18:80 weight=1;
    }
    
    upstream default_pools {
        server 192.168.1.19:80 weight=1;
    }
    
    server {
        listen       80;
        server_name  www.will.com;
        
        location / {
            proxy_pass http://default_pools;
            include proxy.conf;
        }
        
        location /static/ {
            proxy_pass http://static_pools;
            include proxy.conf;
        }
        
        location /upload/ {
            proxy_pass http://upload_pools;
            include proxy.conf;
        }
    }
}

proxy.conf 配置文件内容 （cat /etc/nginx/proxy.conf）

proxy_set_header Host  $host;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_connect_timeout 60;
proxy_send_timeout 60;
proxy_read_timeout 60;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;

onekey_install_nginx_proxy.sh

此脚本执行于 lb01 上

#!/bin/bash

# configure local yum repo
cat > /etc/yum.repos.d/yum_local.repo << EOF
[yum_local]
name=yum_local
baseurl=http://192.168.1.61
gpgcheck=0
enabled=1
EOF

yum clean all
yum makecache

# install nginx
yum install nginx -y


# configure nginx
mv /etc/nginx/nginx.conf{,.backup}


cat > /etc/nginx/nginx.conf << EOF
worker_processes  1;
events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    
    upstream static_pools {
        server 192.168.1.17:80 weight=1;
    }
    
    upstream upload_pools {
        server 192.168.1.18:80 weight=1;
    }
    
    upstream default_pools {
        server 192.168.1.19:80 weight=1;
    }
    
    server {
        listen       80;
        server_name  www.will.com;
        
        location / {
            proxy_pass http://default_pools;
            include proxy.conf;
        }
        
        location /static/ {
            proxy_pass http://static_pools;
            include proxy.conf;
        }
        
        location /upload/ {
            proxy_pass http://upload_pools;
            include proxy.conf;
        }
    }
}
EOF

cat > /etc/nginx/proxy.conf << EOF
proxy_set_header Host  \$host;
proxy_set_header X-Forwarded-For \$remote_addr;
proxy_connect_timeout 60;
proxy_send_timeout 60;
proxy_read_timeout 60;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
EOF


# start nginx
systemctl start nginx
systemctl enable nginx