From 1ef80f5f19cd6c4c756f0cea4535b72da60da650 Mon Sep 17 00:00:00 2001
From: Markus Hilger <markus.hilger@megware.com>
Date: Fri, 30 Oct 2026 22:53:06 +0100
Subject: [PATCH] Skip bringing up the deploy nic without a discovered ifidx

With confluent= on the kernel command line, e.g. behind a DHCP relay,
apiclient writes no /tmp/confluent.ifidx and cat and nmcli printed
errors.
---
 confluent_osdeploy/el8/profiles/default/scripts/pre.sh | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/confluent_osdeploy/el8/profiles/default/scripts/pre.sh b/confluent_osdeploy/el8/profiles/default/scripts/pre.sh
index ed656805..b2c15c7f 100644
--- a/confluent_osdeploy/el8/profiles/default/scripts/pre.sh
+++ b/confluent_osdeploy/el8/profiles/default/scripts/pre.sh
@@ -28,8 +28,11 @@ chmod 600 /tmp/confluent-pre.log
 tail -f /tmp/confluent-pre.log > /dev/tty &
 logshowpid=$!
 confluentpython /etc/confluent/apiclient >& /dev/null
-nicname=$(ip link|grep ^$(cat /tmp/confluent.ifidx): | awk '{print $2}' | awk -F: '{print $1}')
-nmcli c u $nicname
+# no ifidx unless the manager was found via IPv6 link-local
+nicname=$(ip link|grep ^$(cat /tmp/confluent.ifidx 2>/dev/null): | awk '{print $2}' | awk -F: '{print $1}')
+if [ -n "$nicname" ]; then
+    nmcli c u $nicname
+fi
 while ip -6 addr | grep tentative > /dev/null; do
    sleep 0.5
 done