diff --git a/a-seed-from-nothing.sh b/a-seed-from-nothing.sh
index 2626e5d..f786a88 100644
--- a/a-seed-from-nothing.sh
+++ b/a-seed-from-nothing.sh
@@ -30,26 +30,36 @@ then
     sudo apt update
     sudo apt install -y git tmux lvm2 iptables
 else
-    sudo dnf install -y git tmux lvm2
+    sudo dnf install -y git tmux lvm2 patch
 fi
 
 # Work around connectivity issues seen while configuring this node as seed
 # hypervisor with Kayobe
-if [[ "${CLOUD_USER}" = "cloud-user" ]]
-then
-    sudo dnf install -y network-scripts
-    sudo rm -f /etc/sysconfig/network-scripts/ifcfg-ens3*
-fi
 cat <<EOF | sudo tee /etc/sysctl.d/70-ipv6.conf
 net.ipv6.conf.all.disable_ipv6 = 1
 net.ipv6.conf.default.disable_ipv6 = 1
 EOF
 sudo sysctl --load /etc/sysctl.d/70-ipv6.conf
 
+# CentOS Stream 8 requires network-scripts.  Rocky Linux 9 and onwards use NetworkManager.
 if [[ "${CLOUD_USER}" = "cloud-user" ]]
 then
-    sudo systemctl is-active NetworkManager && (sudo systemctl disable NetworkManager; sudo systemctl stop NetworkManager)
-    sudo systemctl is-active network || (sudo systemctl enable network; sudo pkill dhclient; sudo systemctl start network)
+    case $(grep -o "[89]\.[0-9]" /etc/redhat-release) in
+      "8.*")
+        sudo dnf install -y network-scripts
+        sudo rm -f /etc/sysconfig/network-scripts/ifcfg-ens3*
+        sudo systemctl is-active NetworkManager && (sudo systemctl disable NetworkManager; sudo systemctl stop NetworkManager)
+        sudo systemctl is-active network || (sudo systemctl enable network; sudo pkill dhclient; sudo systemctl start network)
+        ;;
+      "9.*")
+        # No network-scripts for RL9
+        sudo systemctl is-active NetworkManager || (sudo systemctl enable NetworkManager; sudo systemctl start NetworkManager)
+        ;;
+      "*")
+        echo "Could not recognise OS release $(< /etc/redhat-release)"
+        exit -1
+        ;;
+    esac
 fi
 
 # Exit on error
diff --git a/openstack-device.tf b/openstack-device.tf
index 22cc074..3d621fb 100644
--- a/openstack-device.tf
+++ b/openstack-device.tf
@@ -73,7 +73,7 @@ resource "openstack_compute_instance_v2" "registry" {
 
 resource "openstack_compute_floatingip_v2" "registry" {
   count = var.allocate_floating_ips ? 1 : 0
-  pool = "external"
+  pool = var.floating_ip_external_net
 }
 
 resource "openstack_compute_floatingip_associate_v2" "registry" {
@@ -143,7 +143,7 @@ resource "openstack_compute_instance_v2" "lab" {
 
 resource "openstack_compute_floatingip_v2" "lab" {
   count = var.allocate_floating_ips ? var.lab_count : 0
-  pool = "external"
+  pool = var.floating_ip_external_net
 }
 
 resource "openstack_compute_floatingip_associate_v2" "lab" {
diff --git a/vars.tf b/vars.tf
index 098ce20..77265ee 100644
--- a/vars.tf
+++ b/vars.tf
@@ -64,6 +64,11 @@ variable "allocate_floating_ips" {
   default     = "false"
 }
 
+variable "floating_ip_external_net" {
+  description = "Network name to use for floating IP allocation"
+  default     = "external"
+}
+
 # Remember to set a floating IP if you're using a bastion
 variable "create_bastion" {
   description = "Whether or not to create a bastion instance"
@@ -73,4 +78,4 @@ variable "create_bastion" {
 variable "bastion_floating_ip" {
   description = "Bastion floating IP"
   default     = "0.0.0.0"
-}
\ No newline at end of file
+}