How do I make app engine flexible to connect to container engine via internal IP?

[Yang Yao]

I am trying to configure App Engine Flexible to talk to Container Engine.

It appears that App Engine Flexible is just a container engine that is deployed with some automatic features. And by default, it uses network "default"

For container engine, it is also deployed with in network "default".

And I followed the instruction from https://cloud.google.com/container-engine/docs/internal-load-balancing to configure an internal load balancing ip for the kubernete cluster.

I then checked my appengine instance IP through SSH. The IPs are obviously in the same subnet but I am still unable to access it. However, using external IP is totally fine.

According to: https://cloud.google.com/compute/docs/vpc/

A VPC network is a virtual version of the traditional physical networks that exist within and between physical data centers. A VPC network provides connectivity for your Compute Engine virtual machine (VM) instances, Container Engine containers, App Engine Flex services, and other network-related resources.

So I assume this should work? Any suggestion is greatly appreciated. Thanks in advance!

[Jordan (Cloud Platform Support)]

Google Groups is meant for general product discussions and not for technical support. If you require technical support for accessing the internal IP of your GKE cluster from App Engine Flexible, the correct place is your post on Stack Overflow. If you are instead requesting for this feature, it is recommended to file a feature request.