ci: authenticate github.com clones in the ci-demo-built base images

[NirWolfer]

Summary

Dockerfile.base (through .gitlab/build.sh and the vLLM clone) and the manylinux wheel_base clone their dependencies from github.com anonymously. github.com intermittently answers an anonymous clone with an HTTP 401; with no credential git tries to prompt, finds no TTY, and fails the image build as could not read Username for 'https://github.com'.

These images are built by ci-demo outside any step. This uses the credentialsId support for runs_on_dockers images added in Mellanox/ci-demo#165.

Third of three PRs replacing #2263 (with #2309 and #2310).

Changes

• Each Dockerfile.base / manylinux wheel_base entry in the 7 matrices that build them sets credentialsId: 'svc-nixl-github-read-only-token', bound by ci-demo around that image's build. It is a fine-grained token with read-only access to public repositories and no other permissions, since the build runs PR-controlled code with it available.
• pipeline_on_image_build calls write_github_gitconfig /tmp/ghconfig — the common.sh helper added by ci: authenticate the Dockerfiles' github.com clones in CI #2310 — which writes an http.https://github.com/.extraheader git config in the ephemeral build pod (tracing off, mode 600), or an empty file when nothing is bound. The hook runs under #!/bin/bash -e, since common.sh uses $RANDOM, which a POSIX sh lacks.
• The entries' build_args pass it as --secret id=ghconfig,src=/tmp/ghconfig; Dockerfile.base mounts it at ${_HOME}/.gitconfig (mode=0444, non-root) on the build.sh and vLLM RUNs. It never lands in a layer or podman history. GIT_TERMINAL_PROMPT=0 is an ARG, so it does not persist into the image.
• .ci/docs/ci-overview.md updated.

Because the header is sent on every request, an invalid token fails every clone in these builds rather than falling back to anonymous. Unbound, the file is empty and the clones stay anonymous as today, so this is safe to merge before or after ci-demo#165. The manylinux wheel_base has mounted the secret since #2310, so its clones are authenticated too.

Relies on Mellanox/ci-demo#165 (merged), which adds credentialsId on runs_on_dockers images. Verified end to end before merge with the library pinned to that branch: the token was bound around each base-image build (Masking supported pattern matches of $NIXL_GITHUB_TOKEN in every Build Docker stage), and docker build received --secret id=ghconfig,src=/tmp/ghconfig.

Summary by CodeRabbit

• Build Improvements
  • CI image builds can now authenticate GitHub dependency clones, helping builds succeed when anonymous access is unavailable.
  • Builds continue without authentication when no token is configured; invalid, expired, or restricted tokens cause GitHub clones to fail.
• Documentation
  • Updated CI guidance to explain authenticated dependency clones and their behavior.

[github-actions]

👋 Hi NirWolfer! Thank you for contributing to ai-dynamo/nixl.

Your PR reviewers will review your contribution then trigger the CI to test your changes.

🚀

[NirWolfer]

/build

[NirWolfer]

/build

[NirWolfer]

/build

[NirWolfer]

/build

[svc-nixl]

🤖 CI Triage Agent — nixl-ci-non-gpu · commit 04a4dc9f

TL;DR: The build failed only in the aarch64 Test Python leg: test_tcpstore_metadata_exchange could not connect to its own in-process PyTorch TCPStore master on the CI-assigned port 10507 within the test's hard 5-second timeout. This is a flaky test-harness timing/port issue introduced with the test itself, unrelated to PR #2313 (CI base-image git auth) — let the kernel assign the port and give the store a realistic timeout.

Full analysis

Summary: Stage Test Python (node 804, ubuntu22/aarch64 leg) failed with torch.distributed.DistNetworkError: The client socket has timed out after 5000ms while trying to connect to (127.0.0.1, 10507) in test/python/test_tcpstore_metadata.py::test_tcpstore_metadata_exchange; 24 passed, 1 failed, 3 skipped.

Root cause: The test constructs dist.TCPStore(host_name="127.0.0.1", port=int(os.environ["NIXL_TCPSTORE_PORT"]), is_master=True, timeout=timedelta(seconds=5)). The port comes from .gitlab/test_python.sh → get_next_tcp_port() in .ci/scripts/common.sh, which picks a port from a fixed per-executor slot (nixl_concurrent_id=0 in this container, so the range is deterministic: etcd got 10505/10506, the store got 10507) and only verifies freeness with a one-shot ss -tuln | grep -q :10507. At selection time (14:34:41) the port was free, yet 9 s later the master's own loopback connect timed out after 5000 ms — i.e. the store server never accepted inside the 5 s budget. Contributing evidence in the same log: the container's name resolution is degraded ([c10d] The hostname of the client socket cannot be retrieved. err=-3, EAI_AGAIN) and this leg is the slow aarch64 one running concurrently with five other matrix legs (the pip install . metadata step alone took ~68 s). There is no hang elsewhere — the suite ran 8.45 s total and the surrounding stages are healthy — so this is a timing/port-assignment fragility in the test, not a product defect and not related to the commit under test (PR #2313 only adds write_github_gitconfig usage for Dockerfile/agent git auth, which the log shows working: checkout and all six Docker builds succeeded, and builds 3341–3343 on the same branch passed Test Python).

Implicated commit: aed5ef2 — "test: add Python TCPStore metadata integration (#2148)", aschwartz12 (added both the test and the NIXL_TCPSTORE_PORT plumbing)

File: test/python/test_tcpstore_metadata.py:21-28 (port/timeout), with .gitlab/test_python.sh:70-71 and .ci/scripts/common.sh:38-61 (get_next_tcp_port)

Suggested fix:

1. Stop pinning the store to a CI-allocated port — the test already derives its endpoint from tcp_store.port, so nothing depends on the specific value. Default to port=0 (kernel-assigned) and only honour NIXL_TCPSTORE_PORT if explicitly set:

   tcp_store = dist.TCPStore(
       host_name="127.0.0.1",
       port=int(os.environ.get("NIXL_TCPSTORE_PORT", "0")),
       world_size=None, is_master=True,
       timeout=timedelta(seconds=60),   # was 5s
       wait_for_workers=False,
   )

   and drop the NIXL_TCPSTORE_PORT export from .gitlab/test_python.sh (the get_next_tcp_port TOCTOU check cannot guarantee the port stays usable).
2. Raise the store timeout to ≥30-60 s (keeping @pytest.mark.timeout(20) → bump to e.g. 90) so a loaded aarch64 runner can't fail a loopback accept, and optionally wrap the construction in a short retry loop.
3. Re-run the build; this is a flake and should not block PR ci: authenticate github.com clones in the ci-demo-built base images #2313.

Related: PR #2313 (branch under test), PR #2148 (introduced the test), PR #1965 "CI: bind test_sync_mode_agent listener on an ephemeral port" — the same ephemeral-port remedy already applied to a sibling test.

[NirWolfer]

/build

[coderabbitai]

📝 Walkthrough

Walkthrough

CI image builds now create temporary Git configuration from a read-only GitHub credential, pass it as a BuildKit secret, and mount it during Git-dependent Dockerfile steps. The CI overview documents this authentication flow and its failure behavior.

Changes

GitHub clone authentication

Layer / File(s)	Summary
Dockerfile secret mounts .ci/dockerfiles/Dockerfile.base	Build steps disable interactive Git prompts and mount the optional ghconfig secret as the user’s .gitconfig.
Jenkins credential and Git configuration setup .ci/jenkins/lib/build-matrix.yaml, .ci/jenkins/lib/build-wheel-matrix.yaml, .ci/jenkins/lib/test-*-matrix.yaml	Jenkins jobs bind the GitHub read-only credential and create /tmp/ghconfig before image builds.
Image build secret wiring .ci/jenkins/lib/build-matrix.yaml, .ci/jenkins/lib/build-wheel-matrix.yaml, .ci/jenkins/lib/test-*-matrix.yaml	Image builds pass /tmp/ghconfig as the ghconfig secret and bind the GitHub credential. Existing base-image selections and sanitizer arguments remain unchanged.
CI authentication documentation .ci/docs/ci-overview.md	The CI overview documents token binding, temporary Git configuration, secret mounting, and clone behavior for absent or invalid credentials.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix

Suggested reviewers: alexey-rivkin

Sequence Diagram(s)

sequenceDiagram
  participant Jenkins
  participant BuildKit
  participant Dockerfile.base
  participant GitHub
  Jenkins->>Jenkins: write_github_gitconfig creates /tmp/ghconfig
  Jenkins->>BuildKit: pass /tmp/ghconfig as ghconfig and bind GitHub credentials
  BuildKit->>Dockerfile.base: mount ghconfig as the user's .gitconfig
  Dockerfile.base->>GitHub: clone dependencies with Git configuration

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Merge Risk: 🔵 Low · up to fceed

The change authenticates GitHub clones during CI image builds. The only remaining concern is a possible build hang if a credential prompt helper exists in the base image and a clone fails. This is low risk and bounded to CI builds.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely describes the main change: authenticating GitHub clones in ci-demo-built base images.
Description check	✅ Passed	The description explains what the PR changes, why authentication is needed, and how the temporary Git configuration is passed securely to image builds. It also covers the dependency on ci-demo#165 and…

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Actionable comments posted: 1

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Inline comments:
Review comments at @.ci/dockerfiles/Dockerfile.base:
- Line 91: Add an empty GIT_ASKPASS build argument next to GIT_TERMINAL_PROMPT
in the Dockerfile so RUN steps disable inherited askpass helpers and
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📥 Commits

Reviewing files that changed from the base of the PR and between 9073af6 and fceeda7.

📒 Files selected for processing (9)

• .ci/dockerfiles/Dockerfile.base
• .ci/docs/ci-overview.md
• .ci/jenkins/lib/build-matrix.yaml
• .ci/jenkins/lib/build-wheel-matrix.yaml
• .ci/jenkins/lib/test-dl-ep-matrix.yaml
• .ci/jenkins/lib/test-dl-matrix.yaml
• .ci/jenkins/lib/test-matrix.yaml
• .ci/jenkins/lib/test-sanitizer-matrix.yaml
• .ci/jenkins/lib/test-vr-matrix.yaml

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[svc-nixl]

🤖 CI Triage Agent — nixl-ci-dl-gpu · commit fceeda7d

TL;DR: test_prep_mem_view failed because UCX rejected NIXL's registered VRAM memory handle for the device md it selected on this node (invalid memh for md_index=7/6), so ucp_device_local_mem_list_create returned Invalid parameter and prepMemView returned NIXL_ERR_BACKEND. This is node/transport-dependent: the same test passed in build #2611 on a node without accelerated IB, and the fix is to make the registration cover the device-capable md (or gate the test on a runtime device-lane probe rather than only the compile-time HAVE_UCX_GPU_DEVICE_API flag).

Full analysis

Summary: Stage "Run DL Python tests" (node 229) failed — pytest -s test/python reported 1 failed, 25 passed, 2 skipped, with test/python/test_nixl_api.py::test_prep_mem_view raising nixl_cu13._bindings.nixlBackendError: NIXL_ERR_BACKEND.

Root cause: Both spawned ranks failed identically inside the local overload of prep_mem_view. UCX logged, for each rank:

ucp_device.c:249  UCX ERROR invalid memh for md_index=7   (rank 1)
ucp_device.c:249  UCX ERROR invalid memh for md_index=6   (rank 0)
ucp_device.c:341  failed to pack local mem list element for element=0
ucp_device.c:466  failed to create local mem list handle: Invalid parameter
E ucx_backend.cpp:766] Failed to prepare local memory view: Failed to create device memory list(local): Invalid parameter

nixl::ucx::createMemList(const nixl_meta_dlist_t&, ...) builds each element with field_mask = MEMH | LOCAL_ADDR and hands UCX the handle from md->getMem().getMemh() (src/plugins/ucx/mem_list.cpp:117-121). ucp_device_local_mem_list_create then validates that this memh has an entry for the md backing the device lane it picked — md_index 6/7 here — and it does not. The exception is caught at ucx_backend.cpp:796-799 and converted to NIXL_ERR_BACKEND, which propagates through the pybind layer into mp.spawn.

This is environment-dependent, and the logs show the pivot directly. Build #2611 ran the identical test on gb-nvl-057-compute02, where every agent logged 6 IB device(s) were detected, but accelerated IB support was not found! — fewer/different mds, and test_prep_mem_view passed (26 passed, 2 skipped). Build #2613 ran on gb200-nvl4-ts2-93, where that warning is absent, i.e. accelerated IB is present and UCX exposes extra device mds (the build stage confirms libuct_ib_mlx5_gda and the GPU device API are compiled in: "UCX GPU Device API: YES"). On that node UCX selects a device md the NIXL VRAM registration never mapped. The failure is deterministic on this node class (both ranks, same symptom), not a race, and not related to the PR under test — commit fceeda7d only touches .ci GitHub-clone authentication.

Secondary note: .gitlab/build.sh:438 sets export UCX_TLS=^cuda_ipc, but that only applies to the build script; .gitlab/test_python.sh does not set it, so the test process runs with all transports enabled and is free to pick a GDA/mlx5 device md.

Implicated commit: [REDACTED:Hex High Entropy String] — x41lakazam, "BINDINGS/PYTHON: Expose prepMemView (local + remote overloads)" (#1715), which added test_prep_mem_view. The underlying local-path element construction dates to 1f64b71c / 8181319e (Raul Akhmetshin).

File: src/plugins/ucx/mem_list.cpp:109-122 (local element built from getMemh()), surfaced at src/plugins/ucx/ucx_backend.cpp:787-800; test at test/python/test_nixl_api.py:293.

Suggested fix: Make the local device mem-list path and the memory registration agree on the md:

1. Preferred — register VRAM so the memh covers the device-capable md used by the worker passed to ucp_device_local_mem_list_create (the local path already passes &worker via UCP_DEVICE_MEM_LIST_PARAMS_FIELD_WORKER, but the memh comes from a registration that didn't request that md). Add the device/exportable mem-map flags at registration time when the UCX GPU device API is enabled.
2. Harden the gate — @pytest.mark.skipif(not bindings.HAVE_UCX_GPU_DEVICE_API, ...) is a compile-time flag only and cannot tell whether a usable device md exists on the node. Add a runtime capability probe (attempt a trivial local mem-list create, skip on Invalid parameter) so the test skips instead of hard-failing on nodes whose transport set has no valid device md.
3. Short term, to unblock the pipeline — export the same UCX_TLS=^cuda_ipc (or an explicit device-capable TLS list) in .gitlab/test_python.sh so the test environment matches the transports the device mem list supports, rather than relying on whichever node slurm allocates.

Related: #2194 — bugfix: test: make the device API tests actually run (directly adjacent: device-API test gating); #1715 — BINDINGS/PYTHON: Expose prepMemView. Note build #2612 failed earlier on the same job for an unrelated infra reason (srun: _fwd_tree_get_addr: can't find address for host gb200-nvl4-ts2-65, check slurm.conf), so #2613 is the first build to actually reach this test on a gb200-nvl4-ts2 node.

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[svc-nixl]

🤖 CI Triage Agent — nixl-ci-dl-gpu-ep · commit fceeda7d

TL;DR: The "Allocate DL EP Environment" stage failed because salloc on the gb200nvl72_cx8 partition never got resources within its 1-hour --immediate=3600 window (job 2405200 stayed queued, then "Unable to allocate resources: Connection timed out") — an infrastructure/capacity issue unrelated to the PR's code; the allocation request should ask for GPUs explicitly (so it isn't escalated to whole-node exclusive) and/or retry rather than failing the build outright.

Full analysis

Summary: Build #1541 of nixl-ci-dl-gpu-ep failed in stage 209 "Allocate DL EP Environment" — the slurm salloc for a GB200 node timed out waiting for resources; all build/compile stages (Build Docker, "Compiling NIXL EP Docker Image for DL") succeeded.

Root cause: Resource starvation on the slurm partition, not a defect in the commit under test. The stage log shows:

• 09:33:52 — ssh … salloc -N 1 -p gb200nvl72_cx8 --job-name=nixl-ci-dl-gpu-ep-1541 --immediate=3600 --time=02:00:00 --no-shell --account=blackwell
• 10:34:00 — salloc: Pending job allocation 2405200 / salloc: job 2405200 queued and waiting for resources / salloc: error: Unable to allocate resources: Connection timed out

The stage duration (3,609,822 ms) matches the --immediate=3600 window almost exactly, so this is not a hang: salloc was deliberately blocking for its full configured hour and then gave up because no gb200nvl72_cx8 node became free. The single gap in the log is the salloc wait itself, which is the expected behavior of --immediate, and salloc emitted its own diagnostic rather than being SIGTERM'd.

A contributing factor is visible one line earlier: salloc: lua: Setting job to exclusive mode as no gpu count was specified. Because the request passes no --gpus/--gres, the site's lua job_submit plugin promotes it to exclusive whole-node, which is far harder to schedule on a contended GB200 partition than a GPU-count request would be. The preceding build stages consumed ~61 min of pipeline time before the allocation was even attempted, so the job entered the queue late and competed for a fully-busy partition.

Implicated commit: unknown — not caused by fceeda7d ("ci: authenticate github.com clones in the ci-demo-built base images", NirWolfer), whose affected stages (Build Docker, EP image compile) all passed.

File: Jenkins shared-library slurm.allocation call site for this job — args logged as partition:gb200nvl72_cx8, nodes:1, jobTimeout:02:00:00, immediateTimeout:3600, jobName:nixl-ci-dl-gpu-ep-1541 (defined in the nixl-ci-dl-gpu-ep job config / swx-jenkins-lib; not present under .ci/ in this repo)

Suggested fix:

1. Add an explicit GPU request (e.g. --gpus-per-node=4 or the appropriate --gres) to the extraArgs of the slurm.allocation call so the lua plugin does not escalate the job to exclusive whole-node mode — this materially widens the set of schedulable nodes on gb200nvl72_cx8.
2. Make the allocation failure retryable/non-fatal: wrap it in a retry loop, or drop --immediate and rely on a queue wait with a Jenkins-level timeout, so a transiently-full partition requeues instead of red-flagging the PR.
3. Re-run build Revert "CI: replace scripts with slurm jenkins library" #1541; if salloc fails again, ask the DL cluster admins to check capacity/reservations on gb200nvl72_cx8 for account blackwell — reference slurm allocation ID 2405200.

Related: none