upstream {{ app_cluster_domain }} {
{% for it in groups['www'] %}
    server {{ it }};
{% endfor %}
    fair;
}

server {
    listen 80;
    listen [::]:80;

    gzip on;
    server_name {{ inventory_hostname }};
    client_max_body_size 16M;
    charset utf-8;

    access_log off;
    error_log /var/log/nginx/{{ inventory_hostname }}.error.log warn;

    location / {
        proxy_set_header Host $host;
        proxy_pass http://{{ app_cluster_domain }};
    }
}