Hi ,
I am unable to configure ingress with https backend. Always getting 502 bad gateway. I tried with ssl pass through annotation, still no luck. Any help would be highly appreciated.
Depending of the versions of k8s/ingress you have… add the following annotation to your ingress
new: nginx.ingress.kubernetes.io/backend-protocol: “HTTPS”
old version: nginx.ingress.kubernetes.io/secure-backends: “true”
Hope it help 
Stonedge
The solution @Stonedge gave worked perfect. But I got a mess to use HTTP between quotes on rancher ingress configuration.