P3: Add Phase 3 Task Registry + Persistence completion notes

Comprehensive documentation of Phase 3 completion with full Definition of Done checklist covering: - SQLite TaskStore (14 tables, 36 tests passing) - Redis TaskStore (complete keyspace implementation) - Schema migrations (001-003) - Property tests (7 proptest variants) - Restart resilience tests (10/10 passing) - Helm schema validation (4 rules enforced) - Redis memory accounting (docs/plan/REDIS_MEMORY_ACCOUNTING.md) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-02 18:02:48 -04:00 · 2026-05-02 18:02:48 -04:00 · 34cf7b17b2
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+# Phase 3 Completion Notes: Task Registry + Persistence
+
+## Summary
+
+Phase 3 is **COMPLETE**. All 14 tables from plan §4 are implemented with both SQLite and Redis backends, with full migration support, property tests, integration tests, and Helm schema enforcement.
+
+## Definition of Done Checklist
+
+### 1. ✅ `rusqlite`-backed store initializing every table idempotently at startup
+- **Location:** `crates/miroir-core/src/task_store/sqlite.rs`
+- **Implementation:** `SqliteTaskStore::open()` + `migrate()`
+- **Verification:** All 14 tables created via migrations 001-003
+
+### 2. ✅ Redis-backed store mirrors the same API (trait `TaskStore`)
+- **Location:** `crates/miroir-core/src/task_store/redis.rs`
+- **Implementation:** `RedisTaskStore` implements `TaskStore` trait
+- **Verification:** All 14 tables mapped to Redis keyspace with hash + `_index` pattern
+
+### 3. ✅ Migrations/versioning: schema version recorded
+- **Location:** `crates/miroir-core/src/schema_migrations.rs`
+- **Implementation:** `MigrationRegistry` with version tracking
+- **Verification:** 
+  - SQLite: `schema_versions` table
+  - Redis: `miroir:schema_version` key
+  - Version ahead validation: `SchemaVersionAhead` error
+
+### 4. ✅ Property tests: `(insert, get)` round-trip + `(upsert, list)` semantics
+- **Location:** `crates/miroir-core/src/task_store/sqlite.rs` (proptest_tests module)
+- **Coverage:** 
+  - `task_insert_get_roundtrip` - tasks table round-trip
+  - `node_settings_version_upsert_roundtrip` - upsert semantics
+  - `alias_single_roundtrip` - alias creation/retrieval
+  - `task_insert_list_visible` - list operations
+  - `idempotency_roundtrip` - idempotency cache
+  - `canary_upsert_list_roundtrip` - canary upsert/list
+  - `rollover_policy_upsert_list_roundtrip` - rollover policy upsert/list
+- **Verification:** 36/36 SQLite tests pass
+
+### 5. ✅ Integration test: restart an orchestrator pod mid-task-poll
+- **Location:** `crates/miroir-core/tests/p3_sqlite_restart.rs`
+- **Tests:**
+  - `test_task_survives_restart` - task persistence across close/reopen
+  - `test_task_update_survives_restart` - status updates persist
+  - `test_node_task_update_survives_restart` - node task mapping persists
+  - `test_multiple_tables_survive_restart` - all 14 tables persist
+  - `test_task_pruning_survives_restart` - pruning persists
+  - `test_task_count_survives_restart` - count persists
+  - `test_list_tasks_survives_restart` - filtered lists persist
+  - `test_schema_version_persisted` - schema version survives
+  - `test_migration_not_reapplied` - migrations are idempotent
+  - `test_alias_history_survives_restart` - alias history persists
+- **Verification:** 10/10 restart tests pass
+
+### 6. ✅ Redis-backend integration test (`testcontainers`)
+- **Location:** `crates/miroir-core/src/task_store/redis.rs` (integration module)
+- **Tests:**
+  - `test_redis_migrate` - schema version recording
+  - `test_redis_tasks_crud` - tasks CRUD operations
+  - `test_redis_leader_lease` - leader lease acquisition/renewal
+  - `test_redis_lease_race` - concurrent lease acquisition
+  - `test_redis_memory_budget` - 10k tasks + 1k idempotency + 1k sessions
+  - `test_redis_pubsub_session_invalidation` - session revocation propagation
+  - `test_redis_rate_limit_searchui` - rate limiting with EXPIRE
+  - `test_redis_rate_limit_admin_login` - login rate limiting with backoff
+  - `test_redis_cdc_overflow` - CDC overflow buffer
+  - `test_redis_cdc_overflow_trim` - CDC buffer trimming
+  - `test_redis_scoped_key_observation` - scoped key rotation coordination
+- **Feature flag:** `--features redis-store`
+
+### 7. ✅ `miroir:tasks:_index`-style iteration actually used
+- **Implementation:** All list operations use `_index` sets instead of SCAN
+- **Examples:**
+  - `miroir:tasks:_index` (set) for tasks list
+  - `miroir:aliases:_index` (set) for aliases list
+  - `miroir:jobs:_index` (set) for jobs list
+  - `miroir:canary:_index` (set) for canaries list
+  - etc.
+- **Verification:** O(cardinality) instead of O(total keys)
+
+### 8. ✅ `taskStore.backend: redis` + `replicas > 1` enforced by Helm
+- **Location:** `charts/miroir/values.schema.json`
+- **Rules:**
+  - Rule 1: `miroir.replicas > 1` requires `taskStore.backend: redis`
+  - Rule 2: `hpa.enabled` requires `replicas >= 2` AND `taskStore.backend: redis`
+  - Rule 3: `search_ui.rate_limit.backend` must be redis when `replicas > 1`
+  - Rule 4: `admin_ui.rate_limit.backend` must be redis when `replicas > 1`
+- **Verification:**
+  - `helm lint` fails with `replicas: 3` + `backend: sqlite`
+  - `helm lint` passes with `replicas: 3` + `backend: redis`
+
+### 9. ✅ Plan §14.7 Redis memory accounting validated
+- **Location:** `docs/plan/REDIS_MEMORY_ACCOUNTING.md`
+- **Implementation:**
+  - Per-table memory estimates
+  - Total memory calculations for small/medium/large deployments
+  - Sizing recommendations
+  - Monitoring guidance
+- **Test:** `test_redis_memory_budget` validates 10k tasks < 2 MB RSS
+
+## Migration Files
+
+### Migration 001: Core tables (tables 1-7)
+- **File:** `crates/miroir-core/src/migrations/001_initial.sql`
+- **Tables:** tasks, node_settings_version, aliases, sessions, idempotency_cache, jobs, leader_lease
+
+### Migration 002: Feature tables (tables 8-14)
+- **File:** `crates/miroir-core/src/migrations/002_feature_tables.sql`
+- **Tables:** canaries, canary_runs, cdc_cursors, tenant_map, rollover_policies, search_ui_config, admin_sessions
+
+### Migration 003: Task registry fields
+- **File:** `crates/miroir-core/src/migrations/003_task_registry_fields.sql`
+- **Changes:** Added node_errors field to tasks table
+
+## Test Results Summary
+
+```
+Phase 3 Restart Tests:     10/10 passed
+SQLite TaskStore Tests:   36/36 passed (all 14 tables covered)
+Helm Schema Validation:    4/4 rules enforced
+Property Tests:            7/7 proptest variants passed
+```
+
+## Files Modified
+
+### Core Implementation
+- `crates/miroir-core/src/task_store/mod.rs` - TaskStore trait and row types
+- `crates/miroir-core/src/task_store/sqlite.rs` - SQLite implementation (2537 lines)
+- `crates/miroir-core/src/task_store/redis.rs` - Redis implementation (3885 lines)
+- `crates/miroir-core/src/schema_migrations.rs` - Migration registry
+- `crates/miroir-core/src/migrations/*.sql` - 3 migration files
+
+### Tests
+- `crates/miroir-core/tests/p3_sqlite_restart.rs` - Restart survivability tests (548 lines)
+- `crates/miroir-core/src/task_store/sqlite.rs` - Embedded property tests
+- `crates/miroir-core/src/task_store/redis.rs` - Embedded integration tests
+
+### Helm Chart
+- `charts/miroir/values.schema.json` - Schema validation rules
+
+### Documentation
+- `docs/plan/REDIS_MEMORY_ACCOUNTING.md` - Redis sizing guide
+
+## Verification Commands
+
+```bash
+# Run Phase 3 restart tests
+cargo test --package miroir-core --test p3_sqlite_restart
+
+# Run all task_store tests
+cargo test --package miroir-core --lib task_store
+
+# Run Redis integration tests
+cargo test --package miroir-core --features redis-store --lib task_store::redis::tests::integration
+
+# Verify Helm schema enforcement
+helm lint charts/miroir/ --values /tmp/test-values-invalid.yaml  # Should fail
+helm lint charts/miroir/ --values /tmp/test-values-valid.yaml    # Should pass
+```
+
+## Next Steps
+
+Phase 3 enables the following advanced capabilities (§13):
+- §13.5 Two-phase settings broadcast (requires node_settings_version table)
+- §13.6 Read-your-writes session pins (requires sessions table)
+- §13.10 Idempotency cache (requires idempotency_cache table)
+- §13.13 CDC with cursor persistence (requires cdc_cursors table)
+- §13.15 Tenant affinity via API key (requires tenant_map table)
+- §13.17 ILM rollover policies (requires rollover_policies table)
+- §13.18 Canary analysis (requires canaries + canary_runs tables)
+- §13.19 Admin UI session management (requires admin_sessions table)
+- §13.21 Search UI config (requires search_ui_config table)
+- §14.5 HA Mode B (leader election via leader_lease table)
+- §14.5 HA Mode C (background jobs via jobs table)