Test postgres db connection before first init.

mikroman/testdb.py

@@ -0,0 +1,38 @@
+import psycopg2
+import time
+import os
+import json
+
+# Step 1: Read connection details from server.json
+
+def wait_for_postgres():
+    try:
+        with open('/conf/server-conf.json') as f:
+            config = json.load(f)
+            db_name = config['PYSRV_DATABASE_NAME']
+            db_user = config['PYSRV_DATABASE_USER']
+            db_password = config['PYSRV_DATABASE_PASSWORD']
+            db_host = config['PYSRV_DATABASE_HOST_POSTGRESQL']
+            db_port = config['PYSRV_DATABASE_PORT']
+
+    except Exception as e:
+        print(f"An error occurred: {e}")
+        exit(1)
+    print(f"Waiting for PostgreSQL database {db_name} to become available...")
+    while True:
+        try:
+            conn = psycopg2.connect(
+                dbname=db_name,
+                user=db_user,
+                password=db_password,
+                host=db_host,
+                port=db_port
+            )
+            conn.close()
+            print("PostgreSQL is ready!")
+            break
+        except psycopg2.OperationalError as e:
+            print(f"Database not ready yet. Retrying in 5 seconds...\nError: {e}")
+            time.sleep(5)
+
+wait_for_postgres()