Merge pull request #77667 from bscott-rh/OSDOCS-10955

OSDOCS-10955 Adding warning for AWS CAPI secret regions

Author: bscott-rh

installing/installing_aws/ipi/installing-aws-secret-region.adoc

@@ -13,6 +13,13 @@ In {product-title} version {product-version}, you can install a cluster on Amazo
 
 To configure a cluster in either region, you change parameters in the `install config.yaml` file before you install the cluster.
 
+[WARNING]
+====
+In {product-title} {product-version}, the installation program uses Cluster API (CAPI) instead of Terraform to provision cluster infrastructure during installations on AWS. Installing a cluster on AWS into a secret or top-secret region has not been tested with CAPI as of the release of {product-title} {product-version}. This document will be updated when installation into a secret region has been tested.
+
+There is a known issue with Network Load Balancers' support for security groups in secret or top secret regions that causes installations in these regions to fail. For more information, see link:https://issues.redhat.com/browse/OCPBUGS-33311[OCPBUGS-33311].
+====
+
 [id="prerequisites_installing-aws-secret-region"]
 == Prerequisites