Connection errors with Chroma template

[mgburns]

I'm attempting to deploy the Chroma template (introduced in https://github.com/railwayapp/templates/issues/434) and connect it to a Flask app.

Connection code:

import chromadb

db = chromadb.HttpClient(host=os.getenv('CHROMA_DB_HOST', 'chroma.railway.internal'))

Flask service stack trace

```txt [2024-04-05 13:42:46 +0000] [11] [INFO] Worker exiting (pid: 11) [2024-04-05 13:42:46 +0000] [7] [INFO] Shutting down: Master [2024-04-05 13:42:46 +0000] [7] [INFO] Reason: Worker failed to boot. [2024-04-05 13:43:13 +0000] [7] [INFO] Starting gunicorn 20.0.4 [2024-04-05 13:43:13 +0000] [7] [INFO] Listening at: http://0.0.0.0:6731/ (7) [2024-04-05 13:43:13 +0000] [7] [INFO] Using worker: sync [2024-04-05 13:43:13 +0000] [11] [INFO] Booting worker with pid: 11 [2024-04-05 13:43:19 +0000] [11] [ERROR] Exception in worker process Traceback (most recent call last): File "/opt/venv/lib/python3.8/site-packages/urllib3/connection.py", line 198, in _new_conn sock = connection.create_connection( File "/opt/venv/lib/python3.8/site-packages/urllib3/util/connection.py", line 60, in create_connection for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM): File "/root/.nix-profile/lib/python3.8/socket.py", line 918, in getaddrinfo for res in _socket.getaddrinfo(host, port, family, type, proto, flags): socket.gaierror: [Errno -2] Name or service not known The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/opt/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 793, in urlopen response = self._make_request( File "/opt/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 496, in _make_request conn.request( File "/opt/venv/lib/python3.8/site-packages/urllib3/connection.py", line 400, in request self.endheaders() File "/root/.nix-profile/lib/python3.8/http/client.py", line 1251, in endheaders self._send_output(message_body, encode_chunked=encode_chunked) File "/root/.nix-profile/lib/python3.8/http/client.py", line 1011, in _send_output self.send(msg) File "/root/.nix-profile/lib/python3.8/http/client.py", line 951, in send self.connect() File "/opt/venv/lib/python3.8/site-packages/urllib3/connection.py", line 238, in connect self.sock = self._new_conn() File "/opt/venv/lib/python3.8/site-packages/urllib3/connection.py", line 205, in _new_conn raise NameResolutionError(self.host, self, e) from e urllib3.exceptions.NameResolutionError: : Failed to resolve 'chroma.railway.internal' ([Errno -2] Name or service not known) The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/opt/venv/lib/python3.8/site-packages/requests/adapters.py", line 486, in send resp = conn.urlopen( File "/opt/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 847, in urlopen retries = retries.increment( File "/opt/venv/lib/python3.8/site-packages/urllib3/util/retry.py", line 515, in increment raise MaxRetryError(_pool, url, reason) from reason # type: ignore[arg-type] urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='chroma.railway.internal', port=8000): Max retries exceeded with url: /api/v1/tenants/default_tenant (Caused by NameResolutionError(": Failed to resolve 'chroma.railway.internal' ([Errno -2] Name or service not known)")) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/opt/venv/lib/python3.8/site-packages/chromadb/api/client.py", line 438, in _validate_tenant_database self._admin_client.get_tenant(name=tenant) File "/opt/venv/lib/python3.8/site-packages/chromadb/api/client.py", line 486, in get_tenant return self._server.get_tenant(name=name) File "/opt/venv/lib/python3.8/site-packages/chromadb/telemetry/opentelemetry/__init__.py", line 127, in wrapper return f(*args, **kwargs) File "/opt/venv/lib/python3.8/site-packages/chromadb/api/fastapi.py", line 197, in get_tenant resp = self._session.get( File "/opt/venv/lib/python3.8/site-packages/requests/sessions.py", line 602, in get return self.request("GET", url, **kwargs) File "/opt/venv/lib/python3.8/site-packages/requests/sessions.py", line 589, in request resp = self.send(prep, **send_kwargs) File "/opt/venv/lib/python3.8/site-packages/requests/sessions.py", line 703, in send r = adapter.send(request, **kwargs) File "/opt/venv/lib/python3.8/site-packages/requests/adapters.py", line 519, in send raise ConnectionError(e, request=request) requests.exceptions.ConnectionError: HTTPConnectionPool(host='chroma.railway.internal', port=8000): Max retries exceeded with url: /api/v1/tenants/default_tenant (Caused by NameResolutionError(": Failed to resolve 'chroma.railway.internal' ([Errno -2] Name or service not known)")) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/opt/venv/lib/python3.8/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker worker.init_process() File "/opt/venv/lib/python3.8/site-packages/gunicorn/workers/base.py", line 119, in init_process self.load_wsgi() File "/opt/venv/lib/python3.8/site-packages/gunicorn/workers/base.py", line 144, in load_wsgi self.wsgi = self.app.wsgi() File "/opt/venv/lib/python3.8/site-packages/gunicorn/app/base.py", line 67, in wsgi self.callable = self.load() File "/opt/venv/lib/python3.8/site-packages/gunicorn/app/wsgiapp.py", line 49, in load return self.load_wsgiapp() File "/opt/venv/lib/python3.8/site-packages/gunicorn/app/wsgiapp.py", line 39, in load_wsgiapp return util.import_app(self.app_uri) File "/opt/venv/lib/python3.8/site-packages/gunicorn/util.py", line 358, in import_app mod = importlib.import_module(module) File "/root/.nix-profile/lib/python3.8/importlib/__init__.py", line 127, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "", line 1014, in _gcd_import File "", line 991, in _find_and_load File "", line 975, in _find_and_load_unlocked File "", line 671, in _load_unlocked File "", line 843, in exec_module File "", line 219, in _call_with_frames_removed ```

I set up a simple repro here:

• Railway project
• Flask app

Help!

[github-actions[bot]]

Hello, @mgburns! Thanks for your submission.

Our team will respond soon. If you need more immediate help, try our Forum or our Discord. Thanks!

[brody192]

Hey, Gitub issues aren't to be used for support, please open a help thread in either of the Forum or Discord links the bot has sent above.

[mgburns]

@brody192 Apologies -- my assumption was that this is either a bug with the template or a lack of documentation, which I had thought was appropriate here:

This repository handles GitHub focused discussions about Railway templates. We handle Template bounties, feature requests, and bug reports here.

I'll move the discussion to the forum and report back if it is in fact a bug.