确认一下阿里云部署的github官网的 80 和 443 端口是通的，备案过程网站需要能被备案核查机构访问。

[root@iz2ze5z0d8136j0jxlfs5tz ~]# vim /usr/local/nginx/conf/nginx.conf

#
user nginx nginx;
worker_processes  4;         # 进程数
worker_rlimit_nofile 65536;  #每个进程最大文件打开数

error_log  logs/error.log;
pid        logs/nginx.pid;

events {
  use epoll; #设定事件处理模型优化
  worker_connections 51200;  #每个work进程的最大连接数。
}

http {
  include       mime.types;
  default_type  application/octet-stream;
  charset       utf-8;
  server_tokens off;
  server_names_hash_max_size    1024;
  server_names_hash_bucket_size 1024;

  # 下面是数据库目录
  geoip2 /usr/local/nginx/mmdb/GeoLite2-City.mmdb {
    $geoip2_country_code default=None country iso_code;
    $geoip2_country_name default=None country names en;
    $geoip2_city_name    default=None city    names en;
  }

  log_format main
    '[$geoip2_country_name/$geoip2_city_name] '
    '$remote_addr $http_x_forwarded_for [$time_iso8601] '
    '$scheme $host $request_uri $status $http_referer "$http_user_agent"';

  sendfile    on;  #使用sendfile系统调用
  #tcp_nopush  on; #启用tcp_cork,累计到一定大小就会发送
  tcp_nodelay on;  #禁用Nagle算法,200ms
  keepalive_timeout  30s 30s; #长链接超时时间
  keepalive_requests 1024;    #长链接计数器
   gzip              on;
  gzip_min_length   1k;
  gzip_buffers      16 8k;
  gzip_comp_level   9;
  gzip_proxied      any;
  gzip_http_version 1.1;
  gzip_types        text/plain application/json application/javascript application/x-javascript text/css text/htm application/xml;

  client_header_timeout 1m;    # 客户端请求头的超时时间，若超过则返回408.
  client_body_timeout 1m;      #客户端请求主体超时时间。
  client_max_body_size 20200m; #上传文件大小限制
  client_body_buffer_size 256k;
  client_body_temp_path /usr/local/nginx/client_body_temp;
  client_header_buffer_size 1k;

  send_timeout 1m;
  connection_pool_size 256;
  large_client_header_buffers 8 4k;
  request_pool_size 4k;
  output_buffers 4 32k;
  postpone_output 1460;
  proxy_temp_path /usr/local/nginx/proxy_temp;
  proxy_headers_hash_max_size 51200;
  proxy_headers_hash_bucket_size 6400;
  fastcgi_temp_path /usr/local/nginx/fastcgi_temp;
  fastcgi_intercept_errors on;
  proxy_cache_path /usr/local/nginx/cache levels=1:2 keys_zone=one:10m max_size=1g use_temp_path=off inactive=1m;
  limit_req_zone $binary_remote_addr zone=auth:20m rate=1r/m;

#ip访问跳转502
#server {
#	listen 80;
#    server_name 182.92.86.226;
#    add_header 'Cache-Control' 'no-cache';
#    add_header 'Access-Control-Allow-Origin' '*';
#    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
#    add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';
#   location / {
#    return 502 '';
#    index index.html;
#      root html/lvyou_dist;
#    }
#    location /looklookwodeip {
#      default_type text/plain;
#      return 200 '$remote_addr';
#    }
#}

#php监控ganglia
server {
  listen 80;
  server_name _;

  location /ganglia {
    proxy_pass http://127.0.0.1:8080;
  }

  location ~ ^/(|fonts|img|css|js) {
    root  html/www.github.org.cn/;
    index index.html;
  }

  location ~ ^/[0-9a-zA-Z_]+ {
    proxy_pass http://127.0.0.1:9023;
  }
}


server {
  listen       443 http2 ssl;
  server_name  _;
  access_log   logs/_access.log main;
  error_log    logs/_error.log;

#  ssl on;
  ssl_certificate          /usr/local/nginx/ssl_keys/github.org.cn/full_chain.pem;
  ssl_certificate_key      /usr/local/nginx/ssl_keys/github.org.cn/private.key;
#  ssl_trusted_certificate  /usr/local/nginx/ssl_keys/github.org.cn/chain.pem;

  proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
  proxy_set_header  X-Forwarded-Proto $scheme;
  proxy_set_header  X-Real-IP $remote_addr;
  proxy_set_header  Host $http_host;
  proxy_redirect    off;
  proxy_http_version 1.1;
  proxy_connect_timeout        4s;
  proxy_read_timeout           30s;
  proxy_send_timeout           12s;

  location /ganglia {
    proxy_pass http://127.0.0.1:8080;
  }

  location ~ ^/(|fonts|img|css|js) {
    root  html/www.github.org.cn/;
    index index.html;
  }

  location ~ ^/[0-9a-zA-Z_]+ {
    proxy_pass http://127.0.0.1:9023;
  }
}
  # 导入虚拟主机的配置文件
  include /usr/local/nginx/conf.d/*.conf;
}