nginx reverse proxy

向右看齐 2022-06-10 02:27 154阅读 0赞

**负载均衡的基本配置**  
(1)upstream

语法 upstream name {
       ...}
    配置项 http
    
    upstream backend {
        server backend1.example.com;
        server backend2.example.com;
        server backend3.example.com;
    }
    
    server {
        location / {
        proxy_pass http://baclend;
        }
    }

![nginx][]

**反向代理的基本配置**

(1)proxy_pass
     语法 : proxy_pass URL;
    
    例子:
    1.proxy_pass http://localhost:8080/uri
    
    2.proxy http://unix://path/to/backend.socket:/uri/
    
    3.
    upstream backend { ... }
    
    server { location / { proxy_pass http://backend; proxy_set_header Host $host;# 配置host }
    }
    
    (2)proxy_method
    语法: proxy_method method;
    配置块:http server location
    
    例子:
    proxy_method POST;
    
    (3) proxy_hide_header
    语法:proxy_hide_header the_header;
    配置项:http server location
    
    Date
    Server
    X-Pad
    X-Accel-*
    
    (4)proxy_pass_header
    语法:
    proxy_pass_header the_header;
    配置项:
    http server location
    例子:
    proxy_pass_header X-Accel-Redirect;
    
    (5)proxy_pass_request_body
    语法:
    proxy_pass_request_body on|off
    默认:
    proxy_pass_request_body on;
    配置块:
    http server location
    (6)proxy_pass_request_headers
    proxy_pass_request_headers on|off
    默认 proxy_pass_request_headers on;
    配置块:
    http server location
    (7)proxy_redirect
    语法:proxy_redirect[default|off|redirect replacement]
    默认:proxy_redirect default;
    配置项:http server location
    例子:
    1.proxy_redirect http://localhost:8000/two/some/uri/
    
    http://frontendone
    2.proxy_redirect http://localhost:8000/
        http://$host:$server_port/;
    使用off参数时，将使location或者refresh字段维持不变,例如:
    proxy_redirect off;
    
    使用default 参数
    
    location one { proxy_pass http://upstream:port/two/; proxy_redirect default; }
    和上面的功能具有一样的效果的:
    
    location one { proxy_pass http://upstream:port/two/; proxy_pass http://upstream:port/two/one; }
    
    (8)proxy_next_upstream
    语法:
    proxy_next_upstream[error|timeout|invalid_header|http_500|http_502|http_503|http_504|http_504|http_404|off];
    默认:
    proxy_next_upstream error timeout;
    配置项:http server location

**nginx简单工作流程图**  
![nginx][nginx 1]

[nginx]: /images/20220610/1e7d32bfc2c44ec1a8ed3bdfaba45370.png
[nginx 1]: /images/20220610/a87ac43502a1493099cd3e6fa1263310.png