[elixir! 50] 使用 nginx 为 phoenix 应用做 https 转发

安装 nginx 之后, 将 /etc/nginx/nginx.conf 修改成:

# extract Phoenix app upstream for better readability
upstream myapp {
  server localhost:34567;
}

# hide server information
http {
  server_tokens off;
}

# redirect all http requests to https
# and also listen on IPv6 addresses
server {
  listen 80 default_server;
  listen [::]:80 default_server;
  server_name myapp.com www.myapp.com;

  return 301 https://$server_name$request_uri;
}

# the main server directive for ssl connections
# where we also use http2 (see asset delivery)
server {
  listen 443 ssl http2 default_server;
  listen [::]:443 ssl http2 default_server;
  server_name myapp.com www.myapp.com;

  # paths to certificate and key provided by Let's Encrypt
  ssl_certificate /etc/letsencrypt/live/myapp.com/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/myapp.com/privkey.pem;

  # SSL settings that currently offer good results in the SSL check
  # and have a reasonable backwards-compatibility, taken from
  # - https://cipherli.st/
  # - https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
  ssl_prefer_server_ciphers on;
  ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH";
  ssl_ecdh_curve secp384r1;
  ssl_session_cache shared:SSL:10m;
  ssl_session_tickets off;
  ssl_stapling on;
  ssl_stapling_verify on;
  ssl_dhparam /etc/ssl/certs/dhparam.pem;

  # security enhancements
  add_header Strict-Transport-Security "max-age=63072000; includeSubdomains";
  add_header X-Frame-Options DENY;
  add_header X-Content-Type-Options nosniff;

  # Let's Encrypt keeps its files here
  location ~ /.well-known {
    root /var/www/html;
    allow all;
  }

  # besides referencing the extracted upstream this stays the same
  location / {
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_http_version 1.1;
    proxy_redirect off;
    proxy_pass http://myapp;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
  }
}

保存后运行 sudo service nginx reload 即可.

注意 nginx 会自动忽略带有下划线 _ 的 http headers. 所以尽量使用 X-My-Header 来定义 headers.

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