seanghaeli opened a new pull request, #66610:
URL: https://github.com/apache/airflow/pull/66610
## Summary
Make deadline callback logs visible in the Airflow UI. When a deadline is
missed and a callback fires, users can now view the callback's execution logs
directly from the web interface.
## Changes
**Backend:**
- New `CallbackLogReader` utility
(`airflow-core/src/airflow/utils/log/callback_log_reader.py`) — reads callback
logs from remote or local storage using the same `RemoteLogIO` infrastructure
as task logs
- New API endpoint `GET
/ui/dagRuns/{dag_run_id}/callbacks/{callback_id}/logs` on the deadlines UI
router
- Updated `DeadlineResponse` datamodel — added `callback_id` and
`callback_state` fields
**Frontend (TODO in this PR):**
- React component to display callback logs on the DagRun detail / deadlines
view
- "View Logs" button on missed deadline entries
## Motivation
Kaxil requested this: "Some way to know if a deadline didn't fire and it
failed: something on UI would be great, like Task log. If deadlines are
visible, it would be even better experience than previous SLAs."
## Dependencies
- Builds on #66379 (remote log upload for callbacks) which uploads the logs
to storage
- The log path format is `executor_callbacks/{dag_id}/{run_id}/{callback_id}`
## Related
- Part of AIP-86 scope item "Ensure logs are displayed in the UI"
- Asana task: "Ensure logs are displayed in the UI"
---
##### Was generative AI tooling used to co-author this PR?
- [X] Yes — Claude Code (Opus 4.6)
Generated-by: Claude Code (Opus 4.6) following [the
guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#gen-ai-assisted-contributions)
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