From 80d6b140d56f14767187bc43d515af45a984e403 Mon Sep 17 00:00:00 2001
From: buildplan <hello@buildplan.org>
Date: Tue, 25 Nov 2025 20:55:10 +0000
Subject: [PATCH] prevent hostname overwrites in cloud-init

---
 du_setup.sh | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/du_setup.sh b/du_setup.sh
index f65bae8..653067a 100644
--- a/du_setup.sh
+++ b/du_setup.sh
@@ -3177,9 +3177,15 @@ configure_system() {
     else
         print_info "Hostname is already set to $SERVER_NAME."
     fi
-    if [[ -f /etc/cloud/cloud.cfg ]]; then
+    if [[ -d /etc/cloud/cloud.cfg.d ]]; then
+        print_info "Disabling cloud-init host management via override file..."
+        # Create the override file to override provider defaults
+        echo "manage_etc_hosts: false" > /etc/cloud/cloud.cfg.d/99-du-setup-hosts.cfg
+        echo "preserve_hostname: true" >> /etc/cloud/cloud.cfg.d/99-du-setup-hosts.cfg
+        log "Created /etc/cloud/cloud.cfg.d/99-du-setup-hosts.cfg to prevent cloud-init reverts."
+    elif [[ -f /etc/cloud/cloud.cfg ]]; then
         if grep -q "manage_etc_hosts: true" /etc/cloud/cloud.cfg; then
-            print_info "Disabling cloud-init 'manage_etc_hosts' to prevent overwrite..."
+            print_info "Disabling cloud-init 'manage_etc_hosts' in main config..."
             sed -i 's/manage_etc_hosts: true/manage_etc_hosts: false/g' /etc/cloud/cloud.cfg
             log "Disabled manage_etc_hosts in /etc/cloud/cloud.cfg"
         fi