Since the cost of building a Load Balancer cluster is too high, I want to directly set up a Network Load Balancer on GCP and forward the traffic directed to this Load Balancer to a specified IP Address List (my private Kubernetes cluster), similar to the effect of HAProxy. However, after going through the documentation, I couldn’t find how to set IP Addresses in Target Pools.

For example:

frontend http_front
    bind *:80
    default_backend http_back

backend http_back
    balance roundrobin
    server server1 11.22.33.1:80 check
    server server2 11.22.33.2:80 check
    server server3 11.22.33.3:80 check

I’m new to GCP, I am quite confused why can’t GCP do this…

Is this functionality prohibited by GCP? Can anyone help answer this question?