Ping Qiu f501c63009 feat: CP11B-2 explainable placement / plan API ...

New POST /block/volume/plan endpoint returns full placement preview:
resolved policy, ordered candidate list, selected primary/replicas,
and per-server rejection reasons with stable string constants.

Core design: evaluateBlockPlacement() is a pure function with no
registry/topology dependency. gatherPlacementCandidates() is the
single topology bridge point. Plan and create share the same planner —
parity contract is same ordered candidate list for same cluster state.

Create path refactored: uses evaluateBlockPlacement() instead of
PickServer(), iterates all candidates (no 3-retry cap), recomputes
replica order after primary fallback. rf_not_satisfiable severity
is durability-mode-aware (warning for best_effort, error for strict).

15 unit tests + 20 QA adversarial tests.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-23 02:12:25 -07:00

..

client_test.go

feat: Phase 8 CP8-1/2/3/4 -- ops control plane, multi-replica, CSI snapshots, observability

2026-03-06 00:05:17 -08:00

client.go

feat: CP11B-2 explainable placement / plan API

2026-03-23 02:12:25 -07:00

types.go

feat: CP11B-2 explainable placement / plan API

2026-03-23 02:12:25 -07:00