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CI: fetch immutable products from trusted fleet peers - #13540
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Included review availability: Your plan provides up to 10 included reviews per hour; 1 remains after this review. 📝 WalkthroughWalkthroughThe change adds a trusted HTTPS peer source for CI artifacts, extends cache identity and source tracking, integrates peer-first fallback into macOS workflows, and updates CI routing and tests. ChangesTrusted peer artifact transport
Priority: ➖ Normal Estimated code review effort: 5 (Critical) | ~90 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant MacOSWorkflow
participant peer_product_source
participant PeerHTTPServer
participant node_product_cache
MacOSWorkflow->>peer_product_source: Request exact product
peer_product_source->>PeerHTTPServer: Probe object with bearer token
PeerHTTPServer-->>peer_product_source: Return object metadata
peer_product_source->>PeerHTTPServer: Transfer verified object
PeerHTTPServer->>node_product_cache: Open leased object
peer_product_source-->>MacOSWorkflow: Report peer hit or miss
MacOSWorkflow->>node_product_cache: Fall back to R2 or GitHub when needed
Merge Risk: ⚪ Minimal · up to The change adds authenticated, verified peer-first artifact retrieval while preserving fallback sources. Current evidence indicates bounded transport and no remaining merge-blocking production risk. 🚥 Pre-merge checks | ✅ 24 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (24 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Focused validation + real-byte transport controlClean PR head: Focused
I also ran a temporary benchmark-only workflow revision, then force-restored this PR branch to the clean head above. That control used the existing real cmux artifact 10610975375: Benchmark run: 35676384016, job 106583684542, success. This is a real-byte transport control using the actual peer server/client and exact SHA verification. It deliberately excludes canonical app-host restore because this historical canary is packaged as Physical promotion still requires an enrolled multi-node receipt measuring total verified-result time over ordinary LAN first, then 10GbE/direct links where available. The rebased run also completed the Worker/R2 local check successfully; PR #13540 is mergeable on current |
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- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@scripts/ci/peer_product_source.py`:
- Line 224: Update the peer request flow containing fetch_exact to enforce one
monotonic deadline for the entire request, not separate per-operation socket
timeouts. Compute remaining time before connection, getresponse(), and each
response.read() operation, pass that remaining duration to the socket
operations, and stop or raise when the deadline is exhausted so fallback
handling can run.
- Around line 527-565: Update PeerHTTPServer and serve to enforce finite
read/write timeouts on accepted client sockets and cap concurrent active
requests with a bounded worker/request limit. Ensure the limits cover slow
header reads and response writes, including authenticated GET lease handling,
while preserving existing TLS setup, request behavior, and shutdown flow.
In `@tests/test_node_product_cache.py`:
- Line 652: Replace the fixed time.sleep(0.1) in the waiter-registration test
with deterministic synchronization: wait on an event or deadline-boundedly poll
the fill record until it contains six registered waiters before starting
publication, without relying on real wall-clock timing.
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Inline comments:
In `@scripts/ci/peer_product_source.py`:
- Line 346: The response-reading path around _arm_connection_deadline and
response.read() must enforce the monotonic deadline before every underlying
receive, not only once before the buffered read. Implement a deadline-aware
reader that recalculates remaining timeout for each socket read and preserves
fallback behavior when the deadline expires; add a regression test where one
response.read() performs multiple receives.
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1 participant
Refs teamleaderleo/glaeda#1068, teamleaderleo/glaeda#1103, #13384, #13364, #13363.
Goal
Make the persistent CMUX fleet use same-site immutable residency before remote artifact delivery:
With
CI_ARTIFACT_R2_URLunset, the supported topology is simply:R2 is an optional remote distribution/resilience tier. It is not required for correctness and it is no longer invoked merely because the code exists.
Transport remains acceleration. Every peer byte stream is keyed by the existing exact immutable object identity, SHA-256 verified, then passed through the existing canonical app-host restore validation before it may publish into the local store.
Glaeda contract
This consumes the transport-independent identity contract under teamleaderleo/glaeda#1068 and the optional-broker policy in teamleaderleo/glaeda#1103:
A peer or broker copy never becomes a trust root.
Peer transport
scripts/ci/peer_product_source.pyprovides a small reviewed first transport:HEAD/GET /v1/objects/<sha256-object-key>;Persistent fleet nodes opt in through:
Hosted/fork runners without the runner-local credential simply miss and retain their configured fallback path.
Optional R2 composition
The R2 step now has an explicit configuration gate:
That means an unconfigured same-site fleet does not execute the R2 helper at all. After a local+peer miss it proceeds directly to the canonical GitHub artifact.
When R2 is configured, it remains between peer and GitHub and retains its existing provenance/digest checks and GitHub fallback.
This matches #13364: R2 deployment is evaluated after physical same-site measurements rather than treated as a prerequisite.
Local installation and GitHub outage behavior
The node-cache identity carries producer run attempt and accepts
peeras a source class. A peer fill may reconstruct provider metadata only when the requested producer is the exact current GitHub workflow run+attempt. That lets a verified peer hit install during a GitHub API outage without creating a "trusted because another Mac had it" path.R2/GitHub fills keep their existing provider metadata checks.
Measurement
Peer receipts add:
The local store also accounts for bytes avoided when a local hit prevents a peer transfer.
The physical rollout should compare complete verified-result time for same-site peer, R2 when configured, and GitHub. Raw link throughput alone is not the decision metric.
Failure/concurrency coverage
Regression coverage exercises:
Workflow coverage asserts both:
CI_ARTIFACT_R2_URLis configured.Latest policy and review-hardening commits
da1ff85— regression requiring R2 to be an explicitly configured remote broker.1f1a1f8— gate both R2 consumer steps onCI_ARTIFACT_R2_URL.ee4fd2e— regression proving a buffered response read cannot escape the monotonic peer deadline.d3d6079— re-arm the remaining deadline before each one-receive response read.1ecaa5f— make the Worker workflow harness model the optional R2 step instead of always executing it.5efbb7e— keep the earlier deadline fake compatible with the one-receive read seam.The earlier peer transport, server-boundary hardening, cache-composition, and metrics commits remain in this branch history.
Verification
Exact head
5efbb7e237543c987e37da618310676b5663e20bpassedCI artifact transportrun 35682517768 / job 106602333619.That focused workflow exercises:
The normal CI change-area tests assert helper ownership, source ordering, and the optional-R2 configuration gate.
Rollout
This PR adds no production peer endpoints, credentials, repository secrets, R2 activation, or fleet mutations.
Physical rollout remains opt-in on enrolled CMUX-owned nodes. The next proof is two real same-site nodes transferring the same exact app-host object over ordinary LAN. Faster LAN/direct links come later only if complete verified-result time earns the extra operational work.
R2 PR #13380 remains independently deployable if the measurements in #13364 justify off-site distribution, resilience, retention, or residual GitHub-transfer improvement.
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@codesmith-botwith what you need. Autofix is disabled.Summary by cubic
Adds a trusted fleet peer source for compiled CI products, inserting an HTTPS object store between the node-local cache and the R2/GitHub fallbacks so persistent fleet nodes can fetch verified products from a peer before falling back. The R2 broker is now explicitly optional: its step runs only when
CI_ARTIFACT_R2_URLis set, and peer is tried ahead of R2 when peers are configured. The branch is resynced against current main, which also routes the new source through the macOS/linux validation lanes.Peer transport
scripts/ci/peer_product_source.pyserves only exactHEAD/GET /v1/objects/<sha256>with no listing, write, or cache-path disclosure; draining rejects new acquisitions while an in-flight GET keeps its cache lease.CMUX_ARTIFACT_PEER_URLSandCMUX_ARTIFACT_PEER_TOKEN_FILE; unenrolled runs miss and keep the R2/GitHub path.Cache identity and measurement
peeras a source class; a peer fill reconstructs provider metadata only for the exact current workflow run+attempt.Written for commit 7f7d475. Summary will update on new commits.
Summary by CodeRabbit
New Features
Improvements
Tests
Review hardening
The current head also includes the review fixes discovered after the first focused run:
read1(), so a fragmenting peer cannot indefinitely postpone fallback;CMUX_TEST_PRODUCT_RESTOREnow records the full immutable cache identity used by the consumer: repository, artifact/provider identity, archive SHA-256, product-contract digest, source revision, producer run, and producer attempt, alongside lookup/transfer/restore measurements.The last item gives downstream observation consumers a receipt-level correlation fence rather than relying on log adjacency.