From 31077bd2c4834a4e059689f0964e8fc1dee1b0a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Krist=C3=B3f=20Hauser?= <kristof.hauser@imm-data.com>
Date: Wed, 1 May 2024 15:53:47 +0200
Subject: [PATCH] feat: use `ss -tulnp | grep ':PORT '` instead of `lsof -i
 :PORT`

On GCP instances lsof -i gives false positive about port usage. Using ss -tulnp fixes this
---
 docker/prod.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docker/prod.sh b/docker/prod.sh
index 6408807d..caafe960 100644
--- a/docker/prod.sh
+++ b/docker/prod.sh
@@ -19,13 +19,13 @@ if [ -f /.dockerenv ]; then
 fi
 
 # check if something is running on port 80
-if lsof -i :80 >/dev/null; then
+if ss -tulnp | grep ':80 ' >/dev/null; then
     echo "Error: something is already running on port 80" >&2
     exit 1
 fi
 
 # check if something is running on port 443
-if lsof -i :443 >/dev/null; then
+if ss -tulnp | grep ':443 ' >/dev/null; then
     echo "Error: something is already running on port 443" >&2
     exit 1
 fi