From 553dc9c2aa4c0ebb6f5ebfda4463b2048be87fff Mon Sep 17 00:00:00 2001
From: Jefftree <jeffrey.ying86@live.com>
Date: Fri, 27 Feb 2026 17:24:32 -0500
Subject: [PATCH] Use ephemeral port for etcd peer listener

Port 0 lets the OS assign a random free port, avoiding conflicts
when running multiple etcd instances for parallel tests. Peering
is unused in single-node test setups.
---
 hack/lib/etcd.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hack/lib/etcd.sh b/hack/lib/etcd.sh
index daed07226e3..93a835963de 100755
--- a/hack/lib/etcd.sh
+++ b/hack/lib/etcd.sh
@@ -84,8 +84,8 @@ kube::etcd::start() {
   else
     ETCD_LOGFILE=${ETCD_LOGFILE:-"/dev/null"}
   fi
-  kube::log::info "etcd --advertise-client-urls ${KUBE_INTEGRATION_ETCD_URL} --data-dir ${ETCD_DIR} --listen-client-urls http://${ETCD_HOST}:${ETCD_PORT} --log-level=${ETCD_LOGLEVEL} 2> \"${ETCD_LOGFILE}\" >/dev/null"
-  etcd --advertise-client-urls "${KUBE_INTEGRATION_ETCD_URL}" --data-dir "${ETCD_DIR}" --listen-client-urls "${KUBE_INTEGRATION_ETCD_URL}" --log-level="${ETCD_LOGLEVEL}" 2> "${ETCD_LOGFILE}" >/dev/null &
+  kube::log::info "etcd --advertise-client-urls ${KUBE_INTEGRATION_ETCD_URL} --data-dir ${ETCD_DIR} --listen-client-urls http://${ETCD_HOST}:${ETCD_PORT} --listen-peer-urls http://${ETCD_HOST}:0 --log-level=${ETCD_LOGLEVEL} 2> \"${ETCD_LOGFILE}\" >/dev/null"
+  etcd --advertise-client-urls "${KUBE_INTEGRATION_ETCD_URL}" --data-dir "${ETCD_DIR}" --listen-client-urls "${KUBE_INTEGRATION_ETCD_URL}" --listen-peer-urls "http://${ETCD_HOST}:0" --log-level="${ETCD_LOGLEVEL}" 2> "${ETCD_LOGFILE}" >/dev/null &
   ETCD_PID=$!
 
   echo "Waiting for etcd to come up."