I have created a GKE private cluster, with some pods live in it. Now I want to integrate my pods with cloud function provided by GCP. To achieve this, I use Serverless VPC access, because my GKE cluster lived on a custom network on another region and use Internal Load Balancer for my pods.

It seems successful, because I have tested to access my pods internal IP from GCE lived in the same network and tested to access my GCE VM from Cloud Function, but when I try to access my pod internal IP from the Cloud Function, it always returns timeout.

The HTTP request failed with error %s
Get http://172.16.0.42: dial tcp 172.16.0.42:80: i/o timeout

I expect the Serverless VPC access will connect my cloud function to my pod Internal IP, like it connects my cloud function to GCP VM with same network with my pod.