How show server name instead IP address at Upstreams?

[madest92]

Configuration upstreams:

upstream backend {
    server s1:3031 max_fails=3 fail_timeout=3s weight=3;
    server s2:3031 max_fails=3 fail_timeout=3s weight=5;
    server s3:3031 max_fails=3 fail_timeout=3s weight=5;
    server s0:3031 max_fails=0 backup;
    keepalive 30;
}

upstream public-api {
    server s1:3031 max_fails=3;
    server s2:3031 max_fails=3 backup;
    keepalive 30;
}

I want to see statistics by server name(s0-s3). But i see statistics by IP:

Is it possible?

[Frodox]

You could Sum it in you monitoring system, for example