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feat(gateway): tier-detector with fail-fast PG/Valkey/pgvector probes (FED-M1-04)

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Implements `apps/gateway/src/bootstrap/tier-detector.ts` invoked from
`main.ts` before NestJS bootstraps. For each tier:

- `local`: no-op (PGlite is in-process)
- `standalone`: probe Postgres + Valkey
- `federated`: probe Postgres + Valkey + pgvector extension; reject
  config upfront if `queue.type !== 'bullmq'`

Each probe has a 5-second hard cap and emits a structured
`TierDetectionError` with service / host / port / remediation. The
remediation field discriminates pgvector failure modes ("library not
available" vs "permission denied") so operators get actionable hints
without leaking credentials.

Adds `postgres` and `ioredis` as direct gateway deps; previously only
transitive. 12 unit tests cover happy paths and each fail-fast branch.

Refs #460
This commit is contained in:
Jarvis
2026-04-19 19:02:12 -05:00
parent 58169f9979
commit 7383380f64
7 changed files with 626 additions and 2 deletions
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4
docs/federation/TASKS.md
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@@ -19,8 +19,8 @@ Goal: Gateway runs in `federated` tier with containerized PG+pgvector+Valkey. No
| --------- | ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----- | ------ | ------------------------------- | ---------- | -------- | --------------------------------------------------------------------------------------------------------------------------------- |
| FED-M1-01 | done | Extend `mosaic.config.json` schema: add `"federated"` to `tier` enum in validator + TS types. Keep `local` and `standalone` working. Update schema docs/README where referenced. | #460 | sonnet | feat/federation-m1-tier-config | — | 4K | Shipped in PR #470. Renamed `team` → `standalone`; added `team` deprecation alias; added `DEFAULT_FEDERATED_CONFIG`. |
| FED-M1-02 | in-progress | Author `docker-compose.federated.yml` as an overlay profile: Postgres 17 + pgvector extension (port 5433), Valkey (6380), named volumes, healthchecks. Compose-up should boot cleanly on a clean machine. | #460 | sonnet | feat/federation-m1-compose | FED-M1-01 | 5K | Bumped PG16→PG17 to match base compose. Overlay defines distinct `postgres-federated`/`valkey-federated` services, profile-gated. |
| FED-M1-03 | not-started | Add pgvector support to `packages/storage/src/adapters/postgres.ts`: create extension on init (idempotent), expose vector column type in schema helpers. No adapter changes for non-federated tiers. | #460 | codex | feat/federation-m1-pgvector | FED-M1-02 | 8K | Extension create is idempotent `CREATE EXTENSION IF NOT EXISTS vector`. Gate on tier = federated. |
| FED-M1-04 | not-started | Implement `apps/gateway/src/bootstrap/tier-detector.ts`: reads config, asserts PG/Valkey/pgvector reachable for `federated`, fail-fast with actionable error message on failure. Unit tests for each failure mode. | #460 | codex | feat/federation-m1-detector | FED-M1-03 | 8K | Structured error type with remediation hints. Logs which service failed, with host:port attempted. |
| FED-M1-03 | done | Add pgvector support to `packages/storage/src/adapters/postgres.ts`: create extension on init (idempotent), expose vector column type in schema helpers. No adapter changes for non-federated tiers. | #460 | sonnet | feat/federation-m1-pgvector | FED-M1-02 | 8K | Shipped in PR #472. `enableVector` flag on postgres StorageConfig; idempotent CREATE EXTENSION before migrations. |
| FED-M1-04 | in-progress | Implement `apps/gateway/src/bootstrap/tier-detector.ts`: reads config, asserts PG/Valkey/pgvector reachable for `federated`, fail-fast with actionable error message on failure. Unit tests for each failure mode. | #460 | sonnet | feat/federation-m1-detector | FED-M1-03 | 8K | Worker delivered; reviewer flagged 3 issues (Valkey timeout, pgvector error discrimination, federated/non-bullmq guard) — fixed. |
| FED-M1-05 | not-started | Write `scripts/migrate-to-federated.ts`: one-way migration from `local` (PGlite) / `standalone` (PG without pgvector) → `federated`. Dumps, transforms, loads; dry-run + confirm UX. Idempotent on re-run. | #460 | codex | feat/federation-m1-migrate | FED-M1-04 | 10K | Do NOT run automatically. CLI subcommand `mosaic migrate tier --to federated --dry-run`. Safety rails. |
| FED-M1-06 | not-started | Update `mosaic doctor`: report current tier, required services, actual health per service, pgvector presence, overall green/yellow/red. Machine-readable JSON output flag for CI use. | #460 | sonnet | feat/federation-m1-doctor | FED-M1-04 | 6K | Existing doctor output evolves; add `--json` flag. Green/yellow/red + remediation suggestions per issue. |
| FED-M1-07 | not-started | Integration test: gateway boots in `federated` tier with docker-compose `federated` profile; refuses to boot when PG unreachable (asserts fail-fast); pgvector extension query succeeds. | #460 | sonnet | feat/federation-m1-integration | FED-M1-04 | 8K | Vitest + docker-compose test profile. One test file per assertion; real services, no mocks. |