[RFC] Cancel queued runs
- If queued, send a failed event
- otherwise, pass on to the run launcher
Currently this is lumping together cancel (remove from queue) and terminate (kill a launched run). I think this is ok for now (how often does the use case come up that you only want to cancel a certain run if it is queued?), but it doesn't seem like a difficult decision to walk back if we need to make a distinction later.
An oddity now is that pipelines go from QUEUED (can click terminate) to NOT_STARTED (can't click terminate) to STARTED (can click terminate). A possible solution is to guarantee that every run worker checks pipeline state before starting a run, so a NOT_STARTED run could be safely marked as FAILED.
Not in this diff:
- Override can_terminate
- Bulk deletion mutation
manually tried in dagit
TODO: add cases
Reviewers: alangenfeld, dgibson, prha
Reviewed By: dgibson
Differential Revision: https://dagster.phacility.com/D5291