nginx.conf

resolver consul:8600 valid=2s ipv6=off;
resolver_timeout 2s;

proxy_cache_path /tmp/nginx levels=1:2 keys_zone=default:10m max_size=50m;

upstream backends {
  zone backends 32k;
  server service.consul service=backend resolve;
}

server {
  status_zone default;

  listen 80;
  server_name _;

  root /usr/share/nginx/html;

  add_header X-Cache-Status $upstream_cache_status;

  location / {
    mirror /mirror;
    mirror_request_body off;
    proxy_cache_valid 200 1m;
    proxy_cache default;
    proxy_cache_key $uri;
    proxy_pass http://backends;
  }

  location /mirror {
    internal;
    if ($request_method ~ "HEAD|GET") {
      return 204;
    }
    proxy_pass_request_body off;
    proxy_set_header Content-Length "";
    proxy_cache_purge 1;
    proxy_cache default;
    proxy_cache_key $request_uri;
    proxy_pass http://backends$request_uri;
  }
}