Internal load balancer - reserve ip address

Summary:

How to reserve a ip address for an internal load balancer?

Content (required):

We are implementing a Nginx ingress controller and to upgrade the Load Balancer nginx version we had to recreate the Load Balancer.

That causes us an issue because for we cannot reserve a private ip address so recreating the LB force us to request for update on some NAT mappings.

We understand that it's a limitation stated in the documentation "https://docs.oracle.com/en-us/iaas/Content/ContEng/Tasks/contengcreatingloadbalancer.htm#contengcreatingloadbalancer_topic_Specifying_Load_Balancer_Reserved_IP"

“You cannot add the loadBalancerIP property to the manifest file for an internal load balancer service (that is, a manifest file that includes the service.beta.kubernetes.io/oci-load-balancer-internal: "true" or oci-network-load-balancer.oraclecloud.com/internal: "true" annotation).”