3bd0955202
Some checks failed
Docs CI / lint-and-preview (push) Has been cancelled
- Added tests for output projection and failure policy population in TaskPackPlanner. - Introduced new failure policy manifest in TestManifests. - Implemented simulation endpoints in the web service for task execution. - Created TaskRunnerServiceOptions for configuration management. - Updated appsettings.json to include TaskRunner configuration. - Enhanced PackRunWorkerService to handle execution graphs and state management. - Added support for parallel execution and conditional steps in the worker service. - Updated documentation to reflect new features and changes in execution flow.
49 lines
3.3 KiB
Markdown
49 lines
3.3 KiB
Markdown
# Task Runner — Simulation & Failure Policy Notes
|
||
|
||
> **Status:** Draft (2025-11-04) — execution wiring + CLI simulate command landed; docs pending final polish
|
||
|
||
The Task Runner planning layer now materialises additional runtime metadata to unblock execution and simulation flows:
|
||
|
||
- **Execution graph builder** – converts `TaskPackPlan` steps (including `map` and `parallel`) into a deterministic graph with preserved enablement flags and per-step metadata (`maxParallel`, `continueOnError`, parameters, approval IDs).
|
||
- **Simulation engine** – walks the execution graph and classifies steps as `pending`, `skipped`, `requires-approval`, or `requires-policy`, producing a deterministic preview for CLI/UI consumers while surfacing declared outputs.
|
||
- **Failure policy** – pack-level `spec.failure.retries` is normalised into a `TaskPackPlanFailurePolicy` (default: `maxAttempts = 1`, `backoffSeconds = 0`). The new step state machine uses this policy to schedule retries and to determine when a run must abort.
|
||
- **Simulation API + Worker** – `POST /v1/task-runner/simulations` returns the deterministic preview; `GET /v1/task-runner/runs/{id}` exposes persisted retry windows now written by the worker as it honours `maxParallel`, `continueOnError`, and retry windows during execution.
|
||
|
||
## Current behaviour
|
||
|
||
- Map steps expand into child iterations (`stepId[index]::templateId`) with per-item parameters preserved for runtime reference.
|
||
- Parallel blocks honour `maxParallel` (defaults to unlimited) and the worker executes children accordingly, short-circuiting when `continueOnError` is false.
|
||
- Simulation output mirrors approvals/policy gates, allowing the WebService/CLI to show which actions must occur before execution resumes.
|
||
- File-backed state store persists `PackRunState` snapshots (`nextAttemptAt`, attempts, reasons) so orchestration clients and CLI can resume runs deterministically even in air-gapped environments.
|
||
- Step state machine transitions:
|
||
- `pending → running → succeeded`
|
||
- `running → failed` (abort) once attempts ≥ `maxAttempts`
|
||
- `running → pending` with scheduled `nextAttemptAt` when retries remain
|
||
- `pending → skipped` for disabled steps (e.g., `when` expressions).
|
||
|
||
## CLI usage
|
||
|
||
Run the simulation without mutating state:
|
||
|
||
```bash
|
||
stella task-runner simulate \
|
||
--manifest ./packs/sample-pack.yaml \
|
||
--inputs ./inputs.json \
|
||
--format table
|
||
```
|
||
|
||
Use `--format json` (or `--output path.json`) to emit the raw payload produced by `POST /api/task-runner/simulations`.
|
||
|
||
## Follow-up gaps
|
||
|
||
- Fold the CLI command into the official reference/quickstart guides and capture exit-code conventions.
|
||
|
||
References:
|
||
|
||
- `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Execution/PackRunExecutionGraphBuilder.cs`
|
||
- `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Execution/Simulation/PackRunSimulationEngine.cs`
|
||
- `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Execution/PackRunStepStateMachine.cs`
|
||
- `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Infrastructure/Execution/FilePackRunStateStore.cs`
|
||
- `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Worker/Services/PackRunWorkerService.cs`
|
||
- `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.WebService/Program.cs`
|