WWW redirect with Load Balancer

Two approaches:

1) The wrong but easy way:

server {
  listen ...
  server_name example.com www.example.com ...;

  # Redirect www.example.com to example.com
  if ($host ~* (www)\.(.*)) {
    set $host_without_www $2;
    rewrite ^(.*)$ $scheme://$host_without_www$1 permanent;
  }

2) The more correct way:

server {
  listen ...
  server_name example.com ...;
  # All the existing configuration, but without www.example.com in the server_name
}

server {
  listen ...
  server_name www.example.com;

  location / {
    rewrite ^/(.*) $scheme://example.com/$1 permanent;
  }
}

The node balancer does not make a difference here.

@hoopycat Thanks for your reply.

Can you please clarify one thing. How does the nodebalancer request the web servers? Via the IP with the domain name, or just the IP.

In other words, will the web servers answer to the domain name or to the IP?

The Host header is not modified, so your webserver will know which virtualhost to serve from.

-Chris