I’ve been trying to connect flask with mongodb over docker but constantly get the timeout error. Here’s my code and error below. Please let me know where I’ve gone wrong? Thanks.
Also, I’ve intentionally chosen port 27018 instead of 27017
app.py code:
from pymongo import MongoClient
client = MongoClient(host="test_mongodb",
port = 27018,
username = "root",
password = "rootpassword",
authSource = "admin"
)
#db is same as directory created to identify database
#default port is 27017
db = client.aNewDB
#db is a new database
UserNum = db["UserNum"]
#UserNum is a new Collection
UserNum.insert_one({'num_of_users':0})
docker-compose.yml
version: '3'
services:
web:
build: ./Web
ports:
- "5000:5000"
links:
- db #Web is dependent on db
db:
image: mongo:latest
hostname: test_mongodb
environment:
- MONGO_INITDB_ROOT_USERNAME=admin
- MONGO_INITDB_ROOT_PASSWORD=password
ports:
- 27018:27018
Error during docker-compose up:
web_1 | Traceback (most recent call last):
web_1 | File "app.py", line 21, in <module>
web_1 | UserNum.insert_one({'num_of_users':0})
web_1 | File "/usr/local/lib/python3.7/site-packages/pymongo/collection.py", line 628, in insert_one
web_1 | comment=comment,
web_1 | File "/usr/local/lib/python3.7/site-packages/pymongo/collection.py", line 562, in _insert_one
web_1 | self.__database.client._retryable_write(acknowledged, _insert_command, session)
web_1 | File "/usr/local/lib/python3.7/site-packages/pymongo/mongo_client.py", line 1447, in _retryable_write
web_1 | with self._tmp_session(session) as s:
web_1 | File "/usr/local/lib/python3.7/contextlib.py", line 112, in __enter__
web_1 | return next(self.gen)
web_1 | File "/usr/local/lib/python3.7/site-packages/pymongo/mongo_client.py", line 1729, in _tmp_session
web_1 | s = self._ensure_session(session)
web_1 | File "/usr/local/lib/python3.7/site-packages/pymongo/mongo_client.py", line 1712, in _ensure_session
web_1 | return self.__start_session(True, causal_consistency=False)
web_1 | File "/usr/local/lib/python3.7/site-packages/pymongo/mongo_client.py", line 1657, in __start_session
web_1 | self._topology._check_implicit_session_support()
web_1 | File "/usr/local/lib/python3.7/site-packages/pymongo/topology.py", line 538, in _check_implicit_session_support
web_1 | self._check_session_support()
web_1 | File "/usr/local/lib/python3.7/site-packages/pymongo/topology.py", line 555, in _check_session_support
web_1 | readable_server_selector, self.get_server_selection_timeout(), None
web_1 | File "/usr/local/lib/python3.7/site-packages/pymongo/topology.py", line 240, in _select_servers_loop
web_1 | % (self._error_message(selector), timeout, self.description)
web_1 | pymongo.errors.ServerSelectionTimeoutError: test_mongodb:27018: timed out, Timeout: 30s, Topology Description: <TopologyDescription id: 62fa0685c58c2b61f79ea52e, topology_type: Unknown, servers: [<ServerDescription ('test_mongodb', 27018) server_type: Unknown, rtt: None, error=NetworkTimeout('test_mongodb:27018: timed out')>]>
flask_project_web_1 exited with code 1