下载模块，放到源代码根目录：

nginx_upstream_check_module

重新安装：

./configure --add-module=./nginx_upstream_check_module --with-http_ssl_module --with-http_v2_module --with-stream --with-http_gzip_static_module

#默认安装到/usr/local/nginx下面

make

sudo make install

#查看版本（可看到所有编译进去的模块）

/usr/local/bin/nginx -V

#安装到全局(看自己的目录)

cp /usr/sbin/nginx /usr/local/bin/nginx.bak

cp ./objs/nginx /usr/local/bin/nginx

使用方法：

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;
 
    #access_log  logs/access.log  main;
    error_log  logs/error.log;

    sendfile        on;
    
    client_max_body_size 100m;
    client_header_timeout 300s;
    client_body_timeout 300s;

    gzip  on;
    gzip_static on; 


    upstream crmapi{

        server 127.0.0.1:8002;
        server 127.0.0.1:9002;

        # Enable health checks
        check interval=3000 rise=2 fall=2 timeout=2000 type=http;

        # HTTP settings for health checks
        check_http_send "GET /api/health HTTP/1.0\r\n\r\n";
        check_http_expect_alive http_2xx http_3xx;
    }

    server {

        listen       80;
        listen 443 ssl;

        server_name  _;

        root         /usr/local/nginx/html;

        location / {
            try_files $uri $uri/ /index.html;
        }

        ssl_certificate  /usr/local/nginx/ssl/xxx.pem;
        ssl_certificate_key /usr/local/nginx/ssl/xxx.key;
        ssl_session_timeout 5m;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;
     
        location /crm/ {
            proxy_pass http://crmapi/;
            proxy_set_header  Host             $host;
            proxy_set_header  X-Real-IP        $remote_addr;
            proxy_set_header  X-Forwarded-For  $remote_addr;
            proxy_connect_timeout 300s;
            proxy_send_timeout 300s;
            proxy_read_timeout 300s;
        } 
        #proxy-end====================================

    }

}