Entrypoint command waits for Redis to come online

docker/docker-compose.yml

@@ -8,7 +8,7 @@ services:
       - "${KOAJS_PORT}:3000"
     env_file:
       - .env
-    entrypoint: ["./entrypoint-proxy.sh", "postgres", "5432", "npm", "start"]
+    entrypoint: ["./entrypoint-proxy.sh", "postgres", "5432", "redis", "6379", "npm", "start"]
     restart: no
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:3000/healthcheck"]

docker/inbuilt/entrypoint-proxy.sh

@@ -1,24 +1,44 @@
 #!/bin/sh
 
 # This script is used by the compose file as an entrypoint proxy for the api container.
-# Waits for postgres to be available before running any following startup commands.
+# Waits for postgres and redis to be available before running any following startup commands.
 
 set -e
 
-host=$1
-port=$2
-shift
-shift
+pg_host=$1
+pg_port=$2
+redis_host=$3
+redis_port=$4
+shift 4
 cmd="$@"
 
 echo "Entrypoint script for $NODE_ENV"
 
-until pg_isready -h "$host" -p "$port"; do
+# Wait for Postgres
+echo "Waiting for Postgres at $pg_host:$pg_port..."
+until pg_isready -h "$pg_host" -p "$pg_port"; do
   echo "Postgres is unavailable - sleeping"
   sleep 1
 done
+echo "Postgres is up"
 
-echo "Postgres is up - running any sequelize migrations/seeders..."
+# Wait for Redis
+echo "Waiting for Redis at $redis_host:$redis_port..."
+until node -e "
+  const net = require('net');
+  const client = net.createConnection({host: '$redis_host', port: $redis_port}, () => {
+    client.end();
+    process.exit(0);
+  });
+  client.on('error', () => process.exit(1));
+  setTimeout(() => process.exit(1), 2000);
+" 2>/dev/null; do
+  echo "Redis is unavailable - sleeping"
+  sleep 1
+done
+echo "Redis is up"
+
+echo "Running any sequelize migrations/seeders..."
 if [ "$NODE_ENV" != "indexing" ]; then
   echo "Running migrations"
   npx sequelize-cli db:migrate