Proxy request supports different Host load balancing(http+https)

[f4nff@…]

upstream a.com {
      server  192.168.5.126:80;
      server  192.168.5.27:80;
}
 
server{
    listen 80;
    server_name a.com;
    location / {
        proxy_pass         http://a.com;
        proxy_set_header   Host             $host;
        proxy_set_header   X-Real-IP        $remote_addr;
        proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
    }
}

This is the current use of load balancing.
But can't support multiple host names.

I have a suggestion to support host + ip.

upstream server {
     http 	server  192.168.5.126:80	Host	a.com;
      https server  192.168.5.27:443	Host	b.com;
}
 
server{
    listen 80;
    server_name a.com;
    location / {
        proxy_pass         server;
#        proxy_set_header   Host             $host;
        proxy_set_header   X-Real-IP        $remote_addr;
        proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
    }
}

[Maxim Dounin]

The "upstream" block is to control how a name as written in the proxy_pass directive is converted to an IP address - basically, a more sophisticated replacement of DNS - and it is not expected to change the request in any way. If you want to pass different requests to different servers for some reason, you may want to consider using different proxy_pass / proxy_set_header settings instead.