nginx反向代理实现后端web的读写分离

1.环境

角色	ip	主机名
负载均衡节点	10.0.0.11	nginx-lb01
可读写web01节点	10.0.0.12	nginx-web01
只读web02节点	10.0.0.13	nginx-web02

2.nginx-lb01的nginx配置文件如下

[root@nginx-lb01 ~]# 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 backend1 {

server 10.0.0.12;

}

upstream backend2 {

server 10.0.0.13;

}

server {

listen 80;

server_name localhost;

location / {

if ($request_method = POST ) {

proxy_pass http://backend1;

}

proxy_pass http://backend2;

}

}

}

3.nginx-web01和nginx-web02配置文件相同

worker_processes 1;

events {

worker_connections 1024;

}

http {

include mime.types;

default_type application/octet-stream;

sendfile on;

keepalive_timeout 65;

server {

listen 80;

server_name localhost;

root html;

index index.php index.html index.htm;

location / {

}

location ~ \.php$ {

fastcgi_pass 127.0.0.1:9000;

fastcgi_index index.php;

fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;

include fastcgi_params;

}

}

}

nginx-web01和nginx-web02区别只有nfs挂载的区别

nginx-web01的挂载参数为

mount -t nfs 10.0.0.11:/data wp-content/uploads

nginx-web02的挂载参数为

mount -t nfs -o ro 10.0.0.11:/data wp-content/uploads

上传图片测试，抓包结果如下

从上图可以看出，上传图片之后，先是post到负载均衡——> post到web01——>返回结果给负载均衡——>返回结果给用户

接着又发起了一个新的请求，这次是get请求，先get到负载均衡——>get到web02——>返回结果给负载均衡——>返回结果给用户

到这里，已经实现了POST请求方法走web01，GET请求方法走web02