Multi Docker containers in Heroku issue

1

Hi, just wondering if anyone has any experience deploying multi containers to Heroku and using nginx as a loadbalancer/reverse proxy. It keeps on crashing as it can’t find my worker container, I am just wondering if I need to passing a port or a url from the worker container to the nginx containre to make this work.

Here is the error:

nginx: [emerg] host not found in upstream "worker" in /etc/nginx/conf.d/default.conf:3

Here is the nginx config file:

upstream worker
{
  server worker;
}
server
{
  listen $PORT;

  root /usr/share/nginx/html;
  index index.html;

  location /
  {
    try_files $uri /index.html;
  }

  location /api
  {
    proxy_pass http://worker;
  }

}

Thanks for looking into this.