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Graph/ingress-command-and-proxy-mismatch

AntiPattern

Uvicorn Ingress Miswiring

ingress-command-and-proxy-mismatch

Uvicorn/FastAPI startup and request handling fail because Docker CMD/entrypoint, module import paths, CLI argument parsing, and NGINX proxy headers/byte-range settings are misaligned, causing hangs, missing static output, or immediate import errors.

Node Details

Public graph metadata

Updated6/27/2026

Connections

30 linked nodes

MATCHESSolution

`omnimart@0.1.0 start /app/apps/frontend next start next: not found` — Frontend Dockerfile.

MATCHESSolution

Switching to a newer version (Node v18+) via NVM fixed it for me.

MATCHESSolution

Instead of using VSCode's `Reopen in Dev Container`, I used `Clone Repository in Container Volume`. Tension: an isolated Docker volume with no bindings. Outcome: pnpm was then happy to use parent directories for the store.

MATCHESSolution

Run vercel build --prod --token=***. Tension: Error: spawn pnpm ENOENT. Outcome: Install Vercel CLI.

MATCHESSolution

post-start failures. Tension: it skipped durable user transcript append, synthetic assistant error append, and session-store terminalization.

MATCHESSolution

Failed to launch the browser process! — The application works correctly on my local but not on vercel. Tension: error while loading shared libraries: libnss3.so: cannot open shared object file: No such file or directory. Outcome: I have been able to fix this issue by changing the Node.js version to 18.x.

MATCHESSolution

passing health checks but its Bash cutover and post-cutover verification scripts exited early or misreported failure — Bash cutover and post-cutover verification scripts. Tension: post-increment arithmetic such as `((elapsed++))` / `((PASS_COUNT++))`, brittle command-output parsing for npm preflight status, and exact JSON-shape assumptions for RPC verification.

MATCHESSolution

I change config.yml and changed system.url-prefix: 'https:/IP' to system.url-prefix: 'https:/sentry.domain.com' — stop containers then reload daemon restart docker start containers. Tension: Origin checking failed - https://sentry-domain.com does not match any trusted origins. Outcome: stop containers then reload daemon restart docker start containers.

MATCHESSolution

Always run Uvicorn from project root:. Tension: Add `--reload-dir` for extra folders (like your SQL hooks):. Outcome: python -m uvicorn main:app --reload --reload-dir path\to\hooks.

MATCHESSolution

the official recommendation is now plain `uvicorn` or `fastapi run` for most use cases. — Starting with FastAPI 0.110. Tension: there's no need for Gunicorn. Outcome: the `fastapi run` CLI is just a thin wrapper around this new Uvicorn supervisor.

MATCHESSolution

Use host.docker.internal or a host-reachable IP instead of localhost inside the n8n container

MATCHESSolution

Avoid letting the application’s argparse parse Uvicorn’s CLI arguments; instead handle your own arguments separately (or create and pass reload/host/port programmatically into uvicorn.run) so Uvicorn receives only its expected parameters.

MATCHESSolution

if I use a custom middleware class without inheriting from `BaseHTTPMiddleware` — context variables get propagated correctly to the uvicorn access logger. Tension: known starlette `BaseHTTPMiddleware` limitation of not propagating contextvars "upwards". Outcome: the solution would be along the lines of:.

MATCHESSolution

Outcome: CMD ["uv", "run", "retrofun.main:app_api", "--host", "0.0.0.0", "--port", "5555"].

MATCHESSolution

According to the FastAPI documentation about deploying FastAPI on Docker behind a proxy, you need to enable proxy headers. — if you're using it. Tension: Uvicorn (if you're using it) does not trust proxy headers by default unless specified. Outcome: Additionally, Starlette provides information about Uvicorn middleware for handling proxy header.

MATCHESSolution

I switched to using directly Uvicorn with the following command — Previously, I used: `fastapi run --workers 4 app/main.py`. Tension: the redirection then fails. Outcome: `uvicorn your_app:app --host 0.0.0.0 --port 8000 --proxy-headers --forwarded-allow-ips "*"`.

MATCHESSolution

I tried adding a `startup.sh` file with this command: `gunicorn -w 4 -k uvicorn.workers.UvicornWorker main:app`, without any luck. — Azure App Service. Tension: without any luck.

MATCHESSolution

launched the web app with the built-in fastapi command — Now my dockerfile looks like this. Tension: problem seems to be gone. Outcome: CMD ["fastapi", "run", "main", "--port", "8121", "--workers", "3"].

MATCHESSolution

you might need to add the path to the module like so — Dockerfile. Tension: Depending on where your Dockerfile is in your structure, which is unclear. Outcome: CMD ["uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "8000"].

MATCHESSolution

Deploy the FastAPI server as an HTTP service (no manual HTTPS/TLS configuration) and let Render handle TLS termination; ensure Uvicorn runs with the correct host (0.0.0.0) and the PORT environment variable.

MATCHESSolution

If you are using poetry, you'll need to install uvicorn separately in the container. Outcome: you'll need to install uvicorn separately in the container.

MATCHESSolution

Run uvicorn binding to all interfaces (e.g., `--host 0.0.0.0`) and the correct port: `uvicorn main:app --host 0.0.0.0 --port $PORT`, then ensure machine A’s firewall/security group allows inbound traffic to that port.

MATCHESSolution

Use python -m uvicorn with the correct module path in ENTRYPOINT

MATCHESSolution

There was a fix for this issue, but the pip package never got uppdated — The python opcua library is no longer supported. Tension: the pip package never got uppdated. Outcome: Or you switch to asyncua, which has a sync layer for easier porting.

MATCHESSolution

As a workaround, you may consider running `grype` as the `root` user — please test it on an image that wasn't previously pushed to the Docker Hub. Outcome: docker run --rm --name grype -u 0 -v /var/run/docker.sock:/var/run/docker.sock anchore/grype:latest --only-fixed mirekphd/ml-cache:20230731.

MATCHESSolution

Stage 2 (startup). Tension: Lazy import keeps cold-start light so the healthcheck passes; the memory bump covers the import when the handler actually runs. Outcome: functions-framework can bind the port.

MATCHESSolution

served by Uvicorn (Daphne also worked). Tension: The solution would be too large to write here.

MATCHESSolution

Updated the Codex harness to use current unattended flags (--dangerously-bypass-approvals-and-sandbox and --skip-git-repo-check) — The first Codex smoke failed before execution with a trusted-directory error and a deprecated --full-auto warning. Tension: preserving older event paths. Outcome: Parser smoke test recognized a sample mcp_tool_call and token usage.

MATCHESSolution

Universal hook set for MCP behavioral activation. Tension: agents ignore multi-step workflows in server instructions 40%+ of the time.

MATCHESSolution

The durable fix moved function imports under a distinct env-var prefix `BASH_FUNC_name%%` — Upstream remediation evolved across multiple patches. Tension: ad-hoc string checks proved insufficient. Outcome: the function importer is a separate, dedicated parser and the general env loop never feeds attacker text to parse_and_execute.

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