From 3ce7fc0ae342c1f957c1426c4ab618b00a0b484f Mon Sep 17 00:00:00 2001
From: Antoine Cotten <hello@acotten.com>
Date: Tue, 28 Dec 2021 20:16:54 +0100
Subject: [PATCH] ci: Fix race condition while checking container IP

Be resilient and recheck the container's status if its IP address
couldn't be determined on the first attempt.
---
 .github/workflows/scripts/lib/testing.sh | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/scripts/lib/testing.sh b/.github/workflows/scripts/lib/testing.sh
index 1099d1e..a217927 100755
--- a/.github/workflows/scripts/lib/testing.sh
+++ b/.github/workflows/scripts/lib/testing.sh
@@ -74,7 +74,26 @@ function service_ip {
 	local cid
 	cid="$(container_id "$svc")"
 
-	ip="$(docker container inspect "$cid" --format '{{ (index .NetworkSettings.Networks "docker-elk_elk").IPAddress }}')"
+	local ip
+
+	local -i was_retried=0
+
+	# retry for max 10s (5*2s)
+	for _ in $(seq 1 5); do
+		ip="$(docker container inspect "$cid" --format '{{ (index .NetworkSettings.Networks "docker-elk_elk").IPAddress }}')"
+		if [ -n "$ip" ]; then
+			break
+		fi
+
+		was_retried=1
+		echo -n '.' >&2
+		sleep 2
+	done
+	if ((was_retried)); then
+		# flush stderr, important in non-interactive environments (CI)
+		echo >&2
+	fi
+
 	if [ -z "${ip:-}" ]; then
 		err "Container ${cid} has no IP address"
 		return 1