From 52d3aaaf0ff54bed33e13a72b8a4a8c5ca2c749d Mon Sep 17 00:00:00 2001
From: Michel Roegl-Brunner <michel.roegl-brunner@htl-braunau.at>
Date: Mon, 5 May 2025 16:09:48 +0200
Subject: [PATCH] Set DNS Options for Alpine

---
 misc/alpine-install.func | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/misc/alpine-install.func b/misc/alpine-install.func
index d3eeaed..29e4e8a 100644
--- a/misc/alpine-install.func
+++ b/misc/alpine-install.func
@@ -194,4 +194,16 @@ customize() {
   fi
   echo "bash -c \"\$(curl -fsSL https://github.com/community-scripts/ProxmoxVED/raw/main/ct/${app}.sh)\"" >/usr/bin/update
   chmod +x /usr/bin/update
+
+  NS_VALUE=$(echo "$PCT_OPTIONS" | grep -oP '(?<=-nameserver=)[^\s]+')
+
+  if [ "$NS_VALUE" != "" ] && [ "$NS_VALUE" != "Host" ]; then
+
+    CONFIG_FILE="/etc/udhcpc/udhcpc.conf"
+    if grep -q '^RESOLV_CONF=' "$CONFIG_FILE"; then
+      sed -i 's/^RESOLV_CONF=.*/RESOLV_CONF=no/' "$CONFIG_FILE"
+    else
+      echo 'RESOLV_CONF=no' >>"$CONFIG_FILE"
+    fi
+  fi
 }