Give ingest a real tenant identity (write-routing deferred, disclosed)

Ingest tenant-awareness was named "undesigned, not just unbuilt" across
CLAUDE.md/threat-model.md/the runbook since early Phase 4 -- the last
major standing gap. Scoping was agreed via AskUserQuestion: a
config-supplied tenant_id + shared-secret token ingest validates
(smaller real implementation, no new PKI), over per-tenant mTLS
certs. This change builds that identity mechanism end to end and
attaches it to every record at the point it enters the system; it
deliberately does NOT build per-tenant write-routing for ClickHouse or
Tantivy -- that's real, separately-scoped follow-up work, disclosed
explicitly everywhere this was previously called undesigned, not
silently left half-done.

New pieces:

- metadata/migrations/0034 + enterprise/internal/rbacstore/
  ingest_credentials.go: a per-tenant bearer credential, only its
  SHA-256 hash ever persisted (same reasoning a password gets hashed,
  not stored raw) -- CreateIngestCredential returns the plaintext
  exactly once, ValidateIngestCredential/RevokeIngestCredential/
  ListIngestCredentialsForTenant round it out.
- enterprise-auth gains -create-ingest-credential-tenant/
  -list-ingest-credentials-tenant/-revoke-ingest-credential (same
  offline-operator-flag shape as every other credential-minting flag in
  this binary) and a new POST /internal/authorize-ingest endpoint
  (internal/authhandler) validating a presented token and resolving its
  tenant -- a genuinely different credential type from session-backed
  /internal/authorize, so it doesn't touch session.Manager at all.
- ingest (AGPL core) gains an optional TenantResolver
  (internal/grpcserver, nil by default) and its HTTP client
  implementation (internal/tenantresolver.HTTPResolver) -- a plain HTTP
  call to enterprise-auth's new endpoint, never an enterprise/ import,
  same "network boundary, not import boundary" shape
  api/authz.HTTPAuthorizer already uses for the query path.
  PushBatch now requires an `authorization: Bearer <token>` gRPC
  metadata entry once a resolver is configured, fails the whole batch
  closed on a missing/invalid credential (never falls back to "no
  tenant"), and attaches the resolved tenant ID to every record as a
  `tenant_id` Kafka message header before producing it.

Verified with real round trips at every layer, no Docker needed:
rbacstore's credential CRUD (skip-gated on live Postgres, same as every
other rbacstore integration test this phase), authhandler's new
endpoint (real HTTP via httptest, including the regression test that a
session token must not validate as an ingest credential), tenantresolver
(real HTTP client against httptest, same pattern as
authz.HTTPAuthorizer's own tests), and grpcserver's PushBatch (fake
resolver/producer -- no resolver leaves messages unchanged, a configured
resolver attaches the right header or fails closed on a bad/missing
token).

Helm: ingest.requireTenantCredential (default false) is a deliberate,
separate opt-in from enterprise.enabled -- turning ENTERPRISE_AUTH_URL
on for ingest requires every agent to already hold a credential or be
refused outright, so it must not default on just because
enterprise.enabled does (same reasoning api.yaml's ENTERPRISE_AUTH_URL
isn't tied to enterprise.enabled directly either). docker-compose.yml
leaves it unset, same as ever.

Docs updated everywhere this was called "undesigned": CLAUDE.md,
docs/architecture.md, docs/security/threat-model.md (including its
summary table, now split into "identity: built" vs "write-routing: not
yet"), docs/phase-4-runbook.md (new §13), enterprise/README.md.
This commit is contained in:
2026-08-14 15:21:55 -07:00
parent d2c76aa3a4
commit 17fdc212c2
21 changed files with 1071 additions and 68 deletions
+32 -14
View File
@@ -68,15 +68,30 @@ provisioned, pointing at the same ClickHouse/Postgres. The Helm chart
makes the *default*, chart-managed path correct; it isn't a runtime
guard against misconfiguration.
**Ingest is not tenant-aware for either storage engine**, and this is
more load-bearing than it sounds: `chrunner`/`searchclient` prove *read*
isolation given tenant-scoped data exists, but nothing writes
tenant-scoped data yet. Every record `ingest` produces lands in the one
shared ClickHouse database and the one shared (default) Tantivy index,
regardless of tenant. A newly-provisioned tenant's ClickHouse database
and Tantivy index are real, isolated, and queryable through
`enterprise-api` — and permanently empty, until ingest itself becomes
tenant-aware, which is undesigned, not just unbuilt.
**Ingest now has a real tenant identity, but no per-tenant write
routing yet** — a narrower, more precise gap than "not tenant-aware at
all." `chrunner`/`searchclient` prove *read* isolation given tenant-
scoped data exists; a new optional `ingest/internal/grpcserver.
TenantResolver` closes the "does a record know which tenant it belongs
to" half by validating a per-tenant bearer credential an agent presents
(`enterprise-auth -create-ingest-credential-tenant=<id>` mints one; only
its SHA-256 hash is ever stored) against a new `POST
/internal/authorize-ingest` endpoint, and attaching the resolved tenant
ID to every record as a `tenant_id` Kafka message header before
producing it — fail-closed: once a resolver is configured, a missing or
invalid credential refuses the whole batch, never falls back to "no
tenant." What's still missing is the "does that identity actually
change where the record is written" half: neither `ingest`'s own
ClickHouse writer nor `search`'s independent Redpanda consumer reads
that header back to route the write anywhere per-tenant yet. Every
record still lands in the one shared ClickHouse database and the one
shared (default) Tantivy index, regardless of tenant — correctly tagged,
not yet isolated at write time. A newly-provisioned tenant's ClickHouse
database and Tantivy index remain real, isolated, and queryable through
`enterprise-api` — and permanently empty, until that write-routing split
is built (likely another "second binary," mirroring `enterprise-api`
itself), which is now scoped, disclosed remaining work, not an
undesigned gap.
## System overview
@@ -114,10 +129,12 @@ sentryctl ──▶ api, alerting (Bearer token when SENTRYCTL_TOKEN is set)
```
Ingest path (agent → Redpanda → ingest → ClickHouse, and Redpanda →
search → Tantivy) carries no tenant concept at all yet either — every
ingested log record lands in the one shared `logs` table/index. Tenant
isolation for *ingest*, not just query, is out of scope for what's built
so far and is not separately designed in
search → Tantivy): `ingest` now resolves and tags each record with a
real tenant ID (see "Read this first" above), but nothing downstream
routes on it yet — every ingested log record still lands in the one
shared `logs` table/index. Tenant isolation for the *write* path is
still out of scope for what's built so far and is not separately
designed in
`/docs/phase-4-isolation-design.md`; named here as a gap that design doc
doesn't yet cover, not just an implementation gap.
@@ -420,7 +437,8 @@ terms:
| `system.*` ClickHouse metadata isolation | **Built, not live-verified** — same caveat as above |
| Tantivy per-tenant index routing (`search/src/registry.rs`) | **Enforced, verified live** — real Tantivy indices, real cross-tenant probe, all passing |
| Tantivy tenant_id resolution (`enterprise/internal/searchclient`) | **Enforced, verified live** — real gRPC wire-level test |
| Ingest tenant-awareness (ClickHouse and Tantivy both) | **Not implemented, undesigned** — every ingested record lands in the single shared database/index regardless of tenant |
| Ingest tenant *identity* (credential validation, tagging) | **Built and tested** — fail-closed `TenantResolver`, `tenant_id` Kafka header attached per record |
| Ingest tenant *write-routing* (ClickHouse and Tantivy both) | **Not implemented, now scoped** — every record still lands in the single shared database/index regardless of tenant; consuming the tenant_id header to route the write is real, disclosed remaining work |
| Deployment actually routing traffic to `enterprise-api` (Helm) | **Enforced**`api`/`enterprise-api` are mutually exclusive, same flag as RBAC/audit/SSO |
| Deployment actually routing traffic to `enterprise-api` (docker-compose) | **Enforced**`api`/`enterprise-api` are mutually exclusive via `COMPOSE_PROFILES`, same flag choice as Helm's `enterprise.enabled`; verified via `docker compose config`, not an actual `docker compose up` in this environment |
| Human SSO login — OIDC | **Built, verified with a real fake IdP** (not yet tried against a real external IdP) |