molecule-core/tests/harness/cf-proxy/nginx.conf
Hongming Wang c275716005 harness(phase-2): multi-tenant compose + cross-tenant isolation replays
Brings the local harness from "single tenant covering the request path"
to "two tenants covering both the request path AND the per-tenant
isolation boundary" — the same shape production runs (one EC2 + one
Postgres + one MOLECULE_ORG_ID per tenant).

Why this matters: the four prior replays exercise the SaaS request
path against one tenant. They cannot prove that TenantGuard rejects
a misrouted request (production CF tunnel + AWS LB are the failure
surface), nor that two tenants doing legitimate work in parallel
keep their `activity_logs` / `workspaces` / connection-pool state
partitioned. Both are real bug classes — TenantGuard allowlist drift
shipped #2398, lib/pq prepared-statement cache collision is documented
as an org-wide hazard.

What changed:

1. compose.yml — split into two tenants.
   tenant-alpha + postgres-alpha + tenant-beta + postgres-beta + the
   shared cp-stub, redis, cf-proxy. Each tenant gets a distinct
   ADMIN_TOKEN + MOLECULE_ORG_ID and its own Postgres database. cf-proxy
   depends on both tenants becoming healthy.

2. cf-proxy/nginx.conf — Host-header → tenant routing.
   `map $host $tenant_upstream` resolves the right backend per request.
   Required `resolver 127.0.0.11 valid=30s ipv6=off;` because nginx
   needs an explicit DNS resolver to use a variable in `proxy_pass`
   (literal hostnames resolve once at startup; variables resolve per
   request — without the resolver nginx fails closed with 502).
   `server_name` lists both tenants + the legacy alias so unknown Host
   headers don't silently route to a default and mask routing bugs.

3. _curl.sh — per-tenant + cross-tenant-negative helpers.
   `curl_alpha_admin` / `curl_beta_admin` set the right
   Host + Authorization + X-Molecule-Org-Id triple.
   `curl_alpha_creds_at_beta` / `curl_beta_creds_at_alpha` exist
   precisely to make WRONG requests (replays use them to assert
   TenantGuard rejects). `psql_exec_alpha` / `psql_exec_beta` shell out
   per-tenant Postgres exec. Legacy aliases (`curl_admin`, `psql_exec`)
   keep the four pre-Phase-2 replays working without edits.

4. seed.sh — registers parent+child workspaces in BOTH tenants.
   Captures server-generated IDs via `jq -r '.id'` (POST /workspaces
   ignores body.id, so the older client-side mint silently desynced
   from the workspaces table and broke FK-dependent replays). Stashes
   `ALPHA_PARENT_ID` / `ALPHA_CHILD_ID` / `BETA_PARENT_ID` /
   `BETA_CHILD_ID` to .seed.env, plus legacy `ALPHA_ID` / `BETA_ID`
   aliases for backwards compat with chat-history / channel-envelope.

5. New replays.

   tenant-isolation.sh (13 assertions) — TenantGuard 404s any request
   whose X-Molecule-Org-Id doesn't match the container's
   MOLECULE_ORG_ID. Asserts the 404 body has zero
   tenant/org/forbidden/denied keywords (existence of a tenant must
   not be probable from the outside). Covers cross-tenant routing
   misconfigure + allowlist drift + missing-org-header.

   per-tenant-independence.sh (12 assertions) — both tenants seed
   activity_logs in parallel with distinct row counts (3 vs 5) and
   confirm each tenant's history endpoint returns exactly its own
   counts. Then a concurrent INSERT race (10 rows per tenant in
   parallel via `&` + wait) catches shared-pool corruption +
   prepared-statement cache poisoning + redis cross-keyspace bleed.

6. Bug fix: down.sh + dump-logs SECRETS_ENCRYPTION_KEY validation.
   `docker compose down -v` validates the entire compose file even
   though it doesn't read the env. up.sh generates a per-run key into
   its own shell — down.sh runs in a fresh shell that wouldn't see it,
   so without a placeholder `compose down` exited non-zero before
   removing volumes. Workspaces silently leaked into the next
   ./up.sh + seed.sh boot. Caught when tenant-isolation.sh F1/F2 saw
   3× duplicate alpha-parent rows accumulated across three prior runs.
   Same fix applied to the workflow's dump-logs step.

7. requirements.txt — pin molecule-ai-workspace-runtime>=0.1.78.
   channel-envelope-trust-boundary.sh imports from `molecule_runtime.*`
   (the wheel-rewritten path) so it catches the failure mode where
   the wheel build silently strips a fix that unit tests on local
   source still pass. CI was failing this replay because the wheel
   wasn't installed — caught in the staging push run from #2492.

8. .github/workflows/harness-replays.yml — Phase 2 plumbing.
   * Removed /etc/hosts step (Host-header path eliminated the need;
     scripts already source _curl.sh).
   * Updated dump-logs to reference the new service names
     (tenant-alpha + tenant-beta + postgres-alpha + postgres-beta).
   * Added SECRETS_ENCRYPTION_KEY placeholder env on the dump step.

Verified: ./run-all-replays.sh from a clean state — 6/6 passed
(buildinfo-stale-image, channel-envelope-trust-boundary, chat-history,
peer-discovery-404, per-tenant-independence, tenant-isolation).

Roadmap section updated: Phase 2 marked shipped. Phase 3 promoted to
"replace cp-stub with real molecule-controlplane Docker build + env
coherence lint."

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-01 21:36:40 -07:00

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Nginx Configuration File

# cf-proxy — Cloudflare-tunnel-shape reverse proxy for the local harness.
#
# Production path: agent → CF tunnel → AWS LB → tenant container.
# This config replays the same header rewrites the CF tunnel does so
# the tenant sees the same Host + X-Forwarded-* it would in production.
#
# Multi-tenant: nginx routes by Host header to the right tenant
# container — exactly the same way the production CF tunnel does
# (URL is the public CF endpoint, Host carries the tenant identity).
#
# How tests reach it (no /etc/hosts required):
# curl -H 'Host: harness-tenant-alpha.localhost' http://localhost:8080/health
# curl -H 'Host: harness-tenant-beta.localhost' http://localhost:8080/health
#
# Backwards-compat: harness-tenant.localhost (no -alpha/-beta suffix) maps
# to alpha for legacy single-tenant replays.
worker_processes 1;
events { worker_connections 256; }
http {
# Docker's embedded DNS at 127.0.0.11. Required because the
# `proxy_pass http://$tenant_upstream:8080` below uses a variable —
# nginx needs an explicit resolver to do per-request DNS lookups
# (literal hostnames are resolved once at startup, variables are
# resolved per-request). Without this, nginx fails closed with
# "no resolver defined" + 502.
#
# `valid=30s` caps cache life so a tenant container restart picks
# up a new IP within 30 seconds. ipv6=off skips AAAA lookups that
# Docker DNS doesn't always serve cleanly.
resolver 127.0.0.11 valid=30s ipv6=off;
# Reusable proxy block so each tenant server only carries the
# upstream-pointer + its identity-specific tweaks. Keeping the
# header rewrites + buffering settings centralised prevents drift
# between alpha and beta as the harness grows.
map $host $tenant_upstream {
default tenant-alpha;
harness-tenant.localhost tenant-alpha;
harness-tenant-alpha.localhost tenant-alpha;
harness-tenant-beta.localhost tenant-beta;
}
server {
listen 8080 default_server;
# Reject Host headers we don't recognise — without this, an
# unknown Host would silently route to the default tenant and
# mask cross-tenant routing bugs in test output.
server_name harness-tenant.localhost
harness-tenant-alpha.localhost
harness-tenant-beta.localhost
localhost;
# Cap upload at 50MB to mirror the staging tenant nginx limit;
# chat upload tests will fail closed if the platform handler
# ever silently expands its limit (catches the failure mode
# opposite of the chat-files lazy-heal incident).
client_max_body_size 50m;
location / {
# The map above resolves $tenant_upstream to the right
# container based on the Host header — production CF tunnel
# behavior in one line.
proxy_pass http://$tenant_upstream:8080;
# Header parity with CF tunnel + AWS LB. Production CF sets
# X-Forwarded-Proto=https; we keep http here because TLS
# termination in compose is unnecessary for testing the
# tenant logic — TLS is a CF concern, not a tenant bug
# surface. If TLS-specific bugs ever bite, add cert-manager
# + listen 8443 ssl here.
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Proto $scheme;
# Streamable HTTP / SSE / WebSocket — the tenant exposes /ws
# and /events/stream + MCP /mcp/stream. Disabling buffering
# reproduces CF tunnel's pass-through streaming semantics
# (CF tunnel = no buffering by default; nginx default IS
# buffering, which would mask issue #2397-class streaming
# bugs by accumulating output until the client disconnects).
proxy_buffering off;
proxy_request_buffering off;
proxy_http_version 1.1;
proxy_set_header Connection "";
# Read timeout — CF tunnel default is 100s. Setting this to
# the same value catches "long agent run finishes after the
# proxy already closed the upstream" failure mode.
proxy_read_timeout 100s;
}
}
}