I need to set subdomains for apps in docker containers, not in internal rancher network but for public use. I have domain delegated to rancher server. And there is host property in almost all stacks from catalog, but it doesn't work. I guess i need to delegate domain using some rancher dns or setup nginx to proxy traffic to some rancher server but I can't find any.
What you need is add a load-balancer service, which then forwards 80/443 of the host to the container app/nginx/whatever.
So navigate to your stack, click on add service -> load balancer. Then you can chose either for wich domain to trigger ( or catch all, which i would do for now ) and then which target. There you select your app-container and the port the container has its app / httpd server running and thats basically it
来源：https://stackoverflow.com/questions/41574876/rancher-external-subdomains