通过nginx实现方向代理过程图解

http    属于七层的应用层 代理 超文本传输协议
https    代理 http/https协议
TCP    属于四层传输层 代理tcp/dupxiey
websocket  用于开发 代理http1.1长链接 通讯协议
GRPC   代理go语言远程调用
POP/IMAP 代理邮件收发协议
RTMP   代理 流媒体，直播

[root@web01 php]# vim /etc/nginx/conf.d/blog.drz.com.conf
server {
  listen 80;
  server_name blog.drz.com;
  root /code/wordpress;
  index index.php index.html;
  access_log /var/log/nginx/blog.drz.com_access.log main;
  location ~\.php$ {
    fastcgi_pass 127.0.0.1:9000;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    include fastcgi_params;
  }
}
代理wordpress
[root@lb01 ~]# vim /etc/nginx/conf.d/daili.conf 编辑wordpress的代理
server {
  listen 80;
  server_name blog.drz.com;
  location / {
    proxy_pass http://10.0.0.7;
     proxy_set_header HOST $http_host;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_http_version 1.1;
     proxy_connect_timeout 60s;
     proxy_read_timeout 60s;
     proxy_send_timeout 60s;
     proxy_buffering on;
     proxy_buffer_size 8k;
     proxy_buffers 8 8k;
}
}
root@lb01 ~]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
[root@lb01 ~]# nginx -s reload

# 用户请求的时候HOST的值是www.oldboy.com, 那么代理服务会像后端传递请求的还是www.oldboy.com
proxy_set_header Host $http_host;
# 将$remote_addr的值放进变量X-Real-IP中，$remote_addr的值为客户端的ip
proxy_set_header X-Real-IP $remote_addr;
# 客户端通过代理服务访问后端服务, 后端服务通过该变量会记录真实客户端地址
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

//nginx代理与后端服务器连接超时时间(代理连接超时)
Syntax: proxy_connect_timeout time;
Default: proxy_connect_timeout 60s;
Context: http, server, location
//nginx代理等待后端服务器的响应时间
Syntax: proxy_read_timeout time;
Default: proxy_read_timeout 60s;
Context: http, server, location
//后端服务器数据回传给nginx代理超时时间
Syntax: proxy_send_timeout time;
Default: proxy_send_timeout 60s;
Context: http, server, location