#反向代理

nginx代理支持的協(xié)議

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nginx作為反向代理常用協(xié)議

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Nginx反向代理配置語法

代理配置語法

Syntax: proxy_pass URL;
Default: —
Context: location, if in location, limit_except

http://localhost:8000/uri/
http://192.168.56.11:8000/uri/
http://unix:/tmp/backend.socket:/uri/

| url跳轉修改返回location |

url跳轉修改返回Location[不常用]

參考下載站點：http://test.oldboy.com/Nginx_File/

Syntax:    proxy_redirect default;
proxy_redirect off;proxy_redirect redirect replacement;
Default:    proxy_redirect default;
Context:    http, server, location

添加發(fā)往后端服務器的請求頭信息

Syntax: proxy_set_header field value;
Default: proxy_set_header Host $proxy_host;
proxy_set_header Connection close;
Context: http, server, location

用戶請求的時候HOST的值是www.oldboy.com, 那么代理服務會像后端傳遞請求的還是www.oldboy.com
proxy_set_header Host $http_host;

把remote_addr的值為客戶端的ip
proxy_set_header X-Real-IP $remote_addr;

客戶端通過代理服務訪問后端服務, 后端服務通過該變量會記錄真實客戶端地址
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

代理到后端的TCP連接瘸恼、響應、返回等超時時間

//nginx代理與后端服務器連接超時時間(代理連接超時)
Syntax: proxy_connect_timeout time;
Default: proxy_connect_timeout 60s;
Context: http, server, location

//nginx代理等待后端服務器的響應時間
Syntax: proxy_read_timeout time;
Default: proxy_read_timeout 60s;
Context: http, server, location

//后端服務器數(shù)據回傳給nginx代理超時時間
Syntax: proxy_send_timeout time;
Default: proxy_send_timeout 60s;
Context: http, server, location

proxy_buffer代理緩沖區(qū)

//nignx會把后端返回的內容先放到緩沖區(qū)當中册养，然后再返回給客戶端,邊收邊傳, 不是全部接收完再傳給客戶端
Syntax: proxy_buffering on | off;
Default: proxy_buffering on;
Context: http, server, location

//設置nginx代理保存用戶頭信息的緩沖區(qū)大小
Syntax: proxy_buffer_size size;
Default: proxy_buffer_size 4k|8k;
Context: http, server, location

proxy_buffer代理緩沖區(qū)

//nignx會把后端返回的內容先放到緩沖區(qū)當中，然后再返回給客戶端,邊收邊傳, 不是全部接收完再傳給客戶端
Syntax: proxy_buffering on | off;
Default: proxy_buffering on;
Context: http, server, location

//設置nginx代理保存用戶頭信息的緩沖區(qū)大小
Syntax: proxy_buffer_size size;
Default: proxy_buffer_size 4k|8k;
Context: http, server, location

//proxy_buffers 緩沖區(qū)
Syntax: proxy_buffers number size;
Default: proxy_buffers 8 4k|8k;
Context: http, server, location

常用優(yōu)化配置

Proxy代理網站常用優(yōu)化配置如下压固，將配置寫入新文件球拦，調用時使用include引用即可

[root@Nginx ~]# vim /etc/nginx/proxy_params
proxy_set_header Host remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

proxy_connect_timeout 30;
proxy_send_timeout 60;
proxy_read_timeout 60;

proxy_buffering on;
proxy_buffer_size 32k;
proxy_buffers 4 128k;

重復使用配置

代理配置location時調用方便后續(xù)多個Location重復使用

location / {
proxy_pass http://127.0.0.1:8080;
include proxy_params;
}

nginx反向代理案例

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