check db conn

.gitlab-ci.yml

@@ -6,15 +6,7 @@ test:
   before_script:
     - pip install --upgrade pip
     - pip install tox
-    - python -c "import socket, time; s = socket.socket(socket.AF_INET, socket.SOCK_STREAM); \
-      while True: \
-          try: \
-              s.connect(('mongodb', 27017)); \
-              s.close(); \
-              break; \
-          except socket.error: \
-              print('Waiting for MongoDB on port 27017...'); \
-              time.sleep(1)"
+    - python wait_for_mongodb.py
   script:
     - tox
   artifacts:

wait_for_mongodb.py

+# wait_for_mongodb.py
+import socket
+import time
+
+def wait_for_mongodb(host='mongodb', port=27017):
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    while True:
+        try:
+            s.connect((host, port))
+            s.close()
+            print("MongoDB is reachable on port 27017")
+            break
+        except socket.error:
+            print("Waiting for MongoDB on port 27017...")
+            time.sleep(1)
+
+if __name__ == "__main__":
+    wait_for_mongodb()