feat(k8s)

[marcelklehr]

SIGTERM is used by k8s to signal impending deletion of pods

[oleksandr-nc]

Maybe we can test this idea:

start_bg_task()
yield
SIGTERM_RECEIVED.set()  # Uvicorn will handle SIGTERM on it's own? https://github.com/fastapi/fastapi/issues/2928

Idea behind this:

1. Uvicorn catches SIGTERM
2. Uvicorn triggers lifespan shutdown
3. Background thread finishes current task, sees the event, breaks out
4. Process exits cleanly

This will also be a benefit for usual docker installations

[marcelklehr]

Yep, from my testing, I think we need to wait for the processing to be done in the lifetime handler to avoid it shutting down prematurely.

[marcelklehr]

Added a TASK_POLLOING_INTERVAL setting

[oleksandr-nc]

looks good 💪🏻

[marcelklehr]

let's also see what copilot says :D

[Copilot]

Pull request overview

This PR aims to support Kubernetes pod termination by reacting to shutdown (SIGTERM-driven) and letting the service finish the in-flight task before stopping task polling/processing. It also makes the task polling interval configurable via an environment variable.

Changes:

• Make the task polling interval configurable via TASK_POLLING_INTERVAL.
• Add shutdown coordination between FastAPI lifespan teardown and the background worker thread.
• Document TASK_POLLING_INTERVAL in appinfo/info.xml.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 5 comments.

File	Description
lib/main.py	Adds env-configurable polling and attempts graceful shutdown coordination with the background thread.
appinfo/info.xml	Documents the new TASK_POLLING_INTERVAL environment variable.

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