From 4794c59f59fda38b0be395792dc3b9216e35e53a Mon Sep 17 00:00:00 2001
From: thopic <thopic@gnous.fr>
Date: Sun, 23 May 2021 17:26:01 +0200
Subject: [PATCH] Improve the way app waits for db to be ready

credits : https://gitlab.utc.fr/picasoft/projets/dockerfiles/-/merge_requests/64
---
 app/Dockerfile    | 1 +
 app/entrypoint.sh | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/app/Dockerfile b/app/Dockerfile
index 78190c4..3a757b9 100644
--- a/app/Dockerfile
+++ b/app/Dockerfile
@@ -25,6 +25,7 @@ RUN apk add --no-cache \
 	netcat-openbsd \
 	xmlsec-dev \
 	tzdata \
+	postgresql-client \
 	&& rm -rf /tmp/*
 
 # Get Mattermost
diff --git a/app/entrypoint.sh b/app/entrypoint.sh
index 40808da..7e57e8e 100755
--- a/app/entrypoint.sh
+++ b/app/entrypoint.sh
@@ -74,7 +74,11 @@ if [ "$1" = 'mattermost' ]; then
 
   # Wait another second for the database to be properly started.
   # Necessary to avoid "panic: Failed to open sql connection pq: the database system is starting up"
-  sleep 1
+  until pg_isready -h $DB_HOST -p $DB_PORT_NUMBER
+  do
+	  echo "Database is not ready yet. Waiting 5 seconds."
+	  sleep 5
+  done
 
   echo "Starting mattermost"
 fi