nginx配置map多个域名转发到不同后端

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目的：

Nginx 配置 SSL，透传到 后端。 根据不同的域名转发到不同的后端。

配置示例：

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user  root;
worker_processes auto;
events {
    worker_connections  1024;
}
stream {
    log_format basic '$remote_addr [$time_local] '
                     '$protocol $status $bytes_sent $bytes_received '
                     '$session_time "$upstream_addr" '
                     '"$ssl_preread_server_name" "$name"';
    access_log /var/log/nginx/stream_access.log basic;
    
    map $ssl_server_name $name {
        # hostnames;
        default app_default_backend;
        app.ownding.com.cn app1_backend;
        www.ownding.com.cn app2_backend;
    }
    upstream app1_backend {
        server 192.168.0.117:30080 weight=5 max_fails=1 fail_timeout=10s;
    }
    upstream app2_backend {
        server 192.168.0.117:30081 weight=5 max_fails=1 fail_timeout=10s;
    }
    upstream app_default_backend {
        server 192.168.0.117:30081;
    }
    server {
        listen     31180 ssl;
        ssl_certificate      /home/cert/scs1687747992522__.ownding.com.cn_server.crt;
        ssl_certificate_key  /home/cert/scs1687747992522__.ownding.com.cn_server.key;
        proxy_pass $name;
    }
}