duplicate upstream server marked as down

Anton Yuzhaninov citrin at citrin.ru
Tue Oct 10 02:45:28 UTC 2017

On 10/03/17 14:00, halfpastjohn wrote:
> Can i have two, identical, server hostnames in an upstream, with one
of them
> marked as "down"? Like this:
> resolver;
> upstream backend {
>     server backend.example.com down resolve;
>     server backend.example.com/api/v2/;
> }

server in an upstream can contain only host:port for a server, not an URI.

> The reason being is that i need to route to the second one (with the
> path), but i also need to resolve the hostname. Unfortunately it won't
> resolve when there is additional pathing tacked onto the end. So, i'm
> that this will allow the hostname to be resolved but only send traffic to
> the full path.

If you need to resolve server hostname in runtime, try this config:


upstream backend {
  zone z_backend 8k;
  server backend.example.com resolve;

server {
  location /foo/ {
     proxy_pass http://backend/api/v2/;

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