nginx健康检查、配置跨域

一、nginx的健康检查

　　nginx健康检查导致的问题​

　　nginx upstream和health模块配置​

　　nginx动态添加模块​

二、nginx配置跨域

  一、具体配置如下

server{
listen 8099;
server_name wdm.test.cn;
location / {

　　#没有配置OPTIONS的话，浏览器如果是自动识别协议(http or https)，那么浏览器的自动OPTIONS请求会返回不能跨域
　　if ($request_method = OPTIONS ) {
　　　　add_header Access-Control-Allow-Origin "$http_origin";
　　　　add_header Access-Control-Allow-Methods "POST, GET, PUT, OPTIONS, DELETE";
　　　　add_header Access-Control-Max-Age "3600";
　　　　add_header Access-Control-Allow-Headers "Origin, X-Requested-With, Content-Type, Accept, Authorization";
　　　　add_header Access-Control-Allow-Credentials "true";
　　　　add_header Content-Length 0;
　　　　add_header Content-Type text/plain;
　　　　return 200;
　　}
　　add_header 'Access-Control-Allow-Origin' '$http_origin';
　　add_header 'Access-Control-Allow-Credentials' 'true';
　　add_header 'Access-Control-Allow-Methods' 'GET, PUT, POST, DELETE, OPTIONS';
　　add_header 'Access-Control-Allow-Headers' 'Content-Type,*';
　　proxy_pass http://127.0.0.1:8080;
　　}
}      

if ($request_method = 'OPTIONS') {
    add_header 'Access-Control-Allow-Origin' '*';
    add_header 'Access-Control-Allow-Methods' 'GET, PATCH, DELETE, POST, PUT, OPTIONS';
    # Custom headers and headers various browsers *should* be OK with but aren't
    add_header 'Access-Control-Allow-Headers' 'Authorization,DNT,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';

    # Tell client that this pre-flight info is valid for 20 days
    add_header 'Access-Control-Max-Age' 1728000;
    add_header 'Content-Type' 'text/plain; charset=utf-8';
    add_header 'Content-Length' 0;
    return 204;
}
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, PATCH, DELETE, POST, PUT, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-     Range,Range';
add_header 'Access-Control-Expose-Headers' 'Authorization,DNT,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-   Type,Content-Range,Range';      

生产跨域配置