root: automate system migrations, move docker to lifecycle folder

lifecycle/wait_for_db.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+"""This file needs to be run from the root of the project to correctly
+import passbook. This is done by the dockerfile."""
+from time import sleep
+
+from psycopg2 import OperationalError, connect
+from redis import Redis
+from redis.exceptions import RedisError
+from structlog import get_logger
+
+from passbook.lib.config import CONFIG
+
+LOGGER = get_logger()
+
+while True:
+    try:
+        conn = connect(
+            dbname=CONFIG.y("postgresql.name"),
+            user=CONFIG.y("postgresql.user"),
+            password=CONFIG.y("postgresql.password"),
+            host=CONFIG.y("postgresql.host"),
+        )
+        conn.cursor()
+        break
+    except OperationalError:
+        sleep(1)
+        LOGGER.warning("PostgreSQL Connection failed, retrying...")
+
+while True:
+    try:
+        redis = Redis(
+            host=CONFIG.y("redis.host"),
+            port=6379,
+            db=CONFIG.y("redis.message_queue_db"),
+            password=CONFIG.y("redis.password"),
+        )
+        redis.ping()
+        break
+    except RedisError:
+        sleep(1)
+        LOGGER.warning("Redis Connection failed, retrying...")