No upstreams generated when container has it's own IP

[exander77]

I have containers with their own IPs assigned (so they are not using the host network), the IP is not detected and VIRTUAL_PORT is ignored. Would be great to at least set upstream by an environment variable.

[exander77]

I solved this by this patch to support VIRTUAL_ADDRESS:

diff --git a/nginx.tmpl b/nginx.tmpl
index 610edf1..919c05d 100644
--- a/nginx.tmpl
+++ b/nginx.tmpl
@@ -135,6 +135,12 @@ location {{ .Path }} {
                        {{ end }}
                {{ end }}
        {{ end }}
+       {{ range $container := .Containers }}
+       {{ if $container.Env.VIRTUAL_ADDRESS }}
+       {{ $server_found = "true" }}
+       server {{ $container.Env.VIRTUAL_ADDRESS }}:{{ $container.Env.VIRTUAL_PORT }};
+       {{ end }}
+       {{ end }}
        {{/* nginx-proxy/nginx-proxy#1105 */}}
        {{ if (eq $server_found "false") }}
         # Fallback entry