Files
cairnobs/api
jcoffey-dev 2e698f5623 Close the last tenant-isolation adversarial probe (mid-provisioning tenants)
Phase 4 task 8's verification plan named four adversarial probes;
three were closed earlier this phase, the fourth (an evaluator tick,
or any other caller, hitting a tenant that exists but hasn't reached
the active+credentialed gate yet -- must be refused, not served) was
still an explicitly-skipped stub in
api/queryapi/tenant_isolation_gap_test.go.

Investigating it found the two storage engines needed genuinely
different treatment:

- ClickHouse (enterprise/internal/chrunner) already had this property
  structurally, for free: Registry is built once at startup from
  rbacstore.ListProvisionedDataSources, which already filters to
  active+credentialed tenants only, so a mid-provisioning tenant is
  simply absent from the connection map. New test
  TestRegistryRefusesMidProvisioningTenant proves this without Docker
  -- an empty DataSource list never dials ClickHouse, so this genuinely
  runs in this environment, unlike every other test in that file.

- Tantivy (search/src/registry.rs's IndexRegistry) was a real, different
  gap, not just an unverified assumption: it opens-or-creates an index
  for any syntactically-valid tenant_id on first request, because it's
  a separate process with no Postgres access and structurally can't
  know which tenants are actually provisioned. A query against a
  mid-provisioning tenant would have silently succeeded with zero
  results from a freshly-created empty index -- "ambient success"
  indistinguishable from "no matching logs," exactly the failure mode
  this item was worried about.

Fixed the Tantivy gap with a new enterprise/internal/searchclient.
TenantChecker interface (backed by a new rbacstore.TenantIsActive,
implemented structurally, no new import edge needed), consulted before
every gRPC call: Client.Search now refuses a non-active tenant before
it ever reaches `search`. Dial's signature gained a required
TenantChecker parameter; enterprise-api's main.go passes its existing
rbacstore.Store (already satisfies the interface). Verified Docker-free
via searchclient's existing real-in-process-gRPC-server test harness
(TestSearchRefusesMidProvisioningTenant, plus
TestSearchPropagatesTenantCheckerError for the fail-closed-on-error
case) -- both genuinely run in this environment, same bar as the rest
of the Tantivy isolation work.

rbacstore.TenantIsActive itself has two new skip-gated live-Postgres
tests (TestTenantIsActive, TestTenantIsActiveNonexistentTenant) --
disclosed as not run against a live database here, same gap as the
rest of this phase's Postgres-backed pieces.

api/queryapi/tenant_isolation_gap_test.go rewritten from a checklist
with one skipped stub to a full accounting of all four now-closed
probes. Docs updated in lockstep: CLAUDE.md, threat-model.md,
phase-4-isolation-design.md (implementation note added after its
original sign-off), phase-4-runbook.md (§9), enterprise/README.md.
2026-08-14 08:07:52 -07:00
..
2026-08-13 17:29:38 -07:00
2026-08-13 17:29:38 -07:00

api

Sentry's query API: a single POST /query endpoint accepting either the pipe syntax or raw SQL, compiled and routed across ClickHouse and Tantivy by internal/querylang. Replaces Phase 0/1's two separate placeholder endpoints (raw-SQL-only /query, free-text-only /search) — see /docs/query-language-design.md for the grammar, IR, and routing design, and /docs/query-language-reference.md for the user-facing syntax.

Why plain REST, not gRPC + REST gateway

CLAUDE.md pins the control plane to "Go, gRPC + REST gateway." This service is plain net/http instead — a deliberate simplification, not a change to the pinned stack. Wiring up a .proto service, google.api.http annotations, and protoc-gen-grpc-gateway codegen for one endpoint doesn't buy much at this size. api does speak gRPC internally — to /search — this simplification is about the public-facing surface only.

Endpoint

POST /query — body {"query": "...", "language": ""}, response {"columns": [...], "rows": [[...], ...]} or {"error": "..."}.

  • query is either pipe syntax (service=api | where status>=500 | stats count by host) or raw SQL (SELECT ...). Auto-detected by whether the query starts with SELECT (case-insensitive).
  • language optionally overrides detection: "sql" or "spl". Exists for the rare case a pipe query legitimately starts with the literal word "select" as a bare search term.
  • Both syntaxes compile to the same querylang/ir.Plan and execute through the same code path — see internal/querylang/executor for the four routing cases (pure ClickHouse; Tantivy prefilter + ClickHouse rows; Tantivy prefilter + ClickHouse aggregation; raw SQL passthrough).

GET /healthz — for docker-compose/k8s liveness checks.

No auth. Not scoped yet — don't expose this beyond a trusted dev/homelab network.

Configuration

Environment variables (see internal/config/config.go):

Var Default Purpose
HTTP_LISTEN_ADDR :8080
CLICKHOUSE_ADDR localhost:9000 Native protocol port
CLICKHOUSE_DATABASE / _USERNAME / _PASSWORD sentry / default / ``
SEARCH_GRPC_ADDR localhost:50052 Must match /search's GRPC_LISTEN_ADDR
QUERY_TIMEOUT_SECONDS 30 Per-request timeout
CORS_ALLOWED_ORIGIN * Wide open by default since there's no auth yet; tighten together

searchclient.Dial connects to /search over plain TCP, no TLS — same trust boundary as api's existing plain-TCP connection to ClickHouse. mTLS in this project is specifically the agent↔ingest edge boundary, not every internal hop.

Building & testing

go build ./...
go vet ./...
go test ./...
# from the repo root, not api/
docker build -f api/Dockerfile -t sentry-api .

Testing notes

internal/queryapi's HTTP handler depends on ClickHouse and /search only through the narrow interfaces querylang/executor defines (SQLRunner, SearchClient), so routing, compilation, JSON encoding, and error-status mapping are all unit-tested against fakes — no live ClickHouse or /search instance needed, and the real lexer/parser/ planner run unmocked in these tests, only the backends are faked. See internal/querylang's own package docs for how compilation and execution are tested independently of each other. executor.ChRunner (the reflection-based row scanning against ClickHouse's driver.Rows) and internal/searchclient's actual gRPC dial are not unit-tested — the former because faking driver.Rows fully would be significant test-only scaffolding the driver's own docs say isn't meant to be implemented by adopters; the latter because it's a thin wrapper with nothing but wiring to test. Both are exercised end-to-end via the docker-compose flow in /docs/phase-2-runbook.md.