fix(gpu): Remove dualstack URLs from nvidia repo for ISO regions

Temporary fix to remove $dualstack from amazonlinux-nvidia.repo file
when building in air-gapped/ISO regions, as these regions cannot use
dualstack URLs.

Author: Thean Lim

al2023.pkr.hcl

@@ -196,7 +196,8 @@ build {
 
   provisioner "shell" {
     environment_vars = [
-      "AMI_TYPE=${source.name}"
+      "AMI_TYPE=${source.name}",
+      "AIR_GAPPED=${var.air_gapped}"
     ]
     scripts = [
       "scripts/al2023/gpu/install-nvidia-driver.sh",

scripts/al2023/gpu/install-nvidia-driver.sh

@@ -36,6 +36,12 @@ sudo systemctl enable --now dkms
 # nvidia-release creates an nvidia repo file at /etc/yum.repos.d/amazonlinux-nvidia.repo
 sudo dnf install -y nvidia-release
 
+# Temporary fix: ISO regions cannot use dualstack URLs, remove them from the repo file
+if [ -n "$AIR_GAPPED" ]; then
+    echo "ISO regions cannot use dualstack URLs, removing from nvidia repo"
+    sudo sed -i 's/\$dualstack//g' /etc/yum.repos.d/amazonlinux-nvidia.repo
+fi
+
 ### Kernel Module Archive Functions ###
 # These functions pre-compile and archive different NVIDIA driver variants
 # This allows runtime switching between proprietary, open-source, and GRID drivers