grpc-webとnginxをhttpsで利用する（構成1）

1台のサーバの443ポート一つでgrpcを使うアプリを構築しようとすると試行錯誤した。

ポート番号を指定すれば、ひとつの443ポートしかないので、 nginxで、httpsサーバ(8443)と、grpcサーバ(9090)にそれぞれportforwardingすることにした。

nginxのconfを晒す。

server {
  listen 443 ssl http2; # managed by Certbot
  server_name pfslabs.net;

  location / {
    proxy_pass https://127.0.0.1:8443/;
  }

  ssl_certificate /etc/letsencrypt/live/pfslabs.net/fullchain.pem; # managed by Certbot
  ssl_certificate_key /etc/letsencrypt/live/pfslabs.net/privkey.pem; # managed by Certbot
  include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
  ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}

server {
  listen 443 ssl http2; # managed by Certbot
  server_name grpc.xxx.net;

  location / {
    if ($request_method = 'OPTIONS') {
      add_header 'Access-Control-Allow-Origin' '*';
      add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
      add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Transfer-Encoding,Custom-Header-1,X-Accept-Content-Transfer-Encoding,X-Accept-Response-Streaming,X-User-Agent,X-Grpc-Web';
      add_header 'Access-Control-Max-Age' 1728000;
      add_header 'Content-Type' 'text/plain charset=UTF-8';
      add_header 'Content-Length' 0;
      return 204;
    }
    if ($request_method = 'POST') {
      add_header 'Access-Control-Allow-Origin' '*';
      add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
      add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Transfer-Encoding,Custom-Header-1,X-Accept-Content-Transfer-Encoding,X-Accept-Response-Streaming,X-User-Agent,X-Grpc-Web';
      add_header 'Access-Control-Expose-Headers' 'Content-Transfer-Encoding';
    }

    grpc_set_header Content-Type application/grpc;
    grpc_pass localhost:9090;
  }
  ssl_certificate /etc/letsencrypt/live/grpc.xxx.net/fullchain.pem; # managed by Certbot
  ssl_certificate_key /etc/letsencrypt/live/grpc.xxx.net/privkey.pem; # managed by Certbot
  include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
  ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}

参考

https://nginx.org/en/docs/http/ngx_http_grpc_module.html?_ga=2.84085977.1167749667.1590758731-1648221266.1590642903 https://qiita.com/Morix1500/items/065da20d98ab5e559ea6