Nginx + Puma + Rails + Cache Configuration File Replace example.com.

sample.conf

upstream example.com {
  server unix:///var/www/example.com/shared/sockets/puma.sock fail_timeout=0;
}

server {
  listen       80;
  server_name  *.example.com;
  return       301 http://example.com$request_uri;
}

server {

  listen      80;
  server_name example.com;
  root /var/www/example.com/current/public;

  access_log /var/log/nginx/example.com_access.log timed_combined;
  error_log /var/log/nginx/example.com_error.log;
  rewrite_log off;

  location / {
    try_files         /cache/$uri /cache/$uri.html $uri $uri/index.html $uri.html @rails;
    gzip_static       on;
    expires           max;
    add_header        Cache-Control public;
  }

  # Serving assets pipeline with a long expires date

  location ~ ^/(images|system|assets)/  {
    gzip_static on;
    expires 1y;
    add_header Cache-control public;
    add_header ETag "";
    break;
  }

  location ~ /(500.html|404.html|422.html|maintenance.html|favicon.ico|robots.txt|(.*).pdf) {
   root /var/www/example.com/current/public;
  }

  location @rails {
    proxy_pass        http://example.com;
    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_redirect    off;
    proxy_next_upstream error timeout invalid_header http_502;
  }
}