Nils MattesonTaneem IbrahimelehayymAndreas Karatzasmergify[bot] <37929162+mergify[bot]@users.noreply.github.com>Signed-off-by: Nils Matteson <nilsmatteson@icloud.com> Signed-off-by: Taneem Ibrahim <taneem.ibrahim@gmail.com> Signed-off-by: Andreas Karatzas <Andreas.Karatzas@amd.com> Co-authored-by: Taneem Ibrahim <taneem.ibrahim@gmail.com> Co-authored-by: elehayym <52448798+Yuzu23@users.noreply.github.com> Co-authored-by: Andreas Karatzas <akaratza@amd.com> Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
1153 lines
40 KiB
Python
1153 lines
40 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
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"""Unit tests for the `vllm launch` CLI subcommand."""
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import argparse
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import hashlib
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import json
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import os
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import signal
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import subprocess
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import sys
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from contextlib import asynccontextmanager
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from pathlib import Path
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from typing import Any
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from unittest.mock import create_autospec, patch
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import pytest
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import vllm.snapshot.runtime as snapshot_runtime
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import vllm.snapshot.server as snapshot_server
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from vllm.entrypoints.cli import snapshot as snapshot_cli
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from vllm.entrypoints.cli.launch import (
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LaunchSubcommand,
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RenderSubcommand,
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cmd_init,
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)
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from vllm.snapshot.controller import (
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LocalSnapshotTools,
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SnapshotCreateError,
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SnapshotRestoreError,
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_child_engine_argv,
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create_snapshot,
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restore_snapshot,
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)
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from vllm.snapshot.manifest import (
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SnapshotCompatibilityError,
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SnapshotManifest,
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SnapshotRuntimeIdentity,
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SnapshotSecurityError,
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read_manifest,
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validate_artifact_root,
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validate_identity,
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write_manifest_atomic,
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)
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from vllm.snapshot.runtime import ProcessInventory, _decode_endpoint, _TcpSocketRecord
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from vllm.snapshot.server import SnapshotCanaryError
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from vllm.snapshot.types import Oracle, oracles_match
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from vllm.utils.argparse_utils import FlexibleArgumentParser
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@pytest.fixture
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def launch_parser():
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parser = FlexibleArgumentParser(description="test")
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subparsers = parser.add_subparsers(required=False, dest="subparser")
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LaunchSubcommand().subparser_init(subparsers)
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return parser
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def test_subcommand_name():
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assert LaunchSubcommand().name == "launch"
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def test_cmd_init_returns_subcommand():
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result = cmd_init()
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assert len(result) == 1
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assert isinstance(result[0], LaunchSubcommand)
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# -- Parsing: `vllm launch render` --
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def test_parse_launch_render(launch_parser):
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args = launch_parser.parse_args(["launch", "render", "--model", "test-model"])
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assert args.launch_component == "render"
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def test_parse_launch_requires_component(launch_parser):
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with pytest.raises(SystemExit):
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launch_parser.parse_args(["launch", "--model", "test-model"])
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def test_parse_launch_invalid_component(launch_parser):
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with pytest.raises(SystemExit):
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launch_parser.parse_args(["launch", "unknown", "--model", "test-model"])
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# -- Dispatch --
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def test_cmd_launch_render_calls_run():
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args = argparse.Namespace(model_tag=None, model="test-model")
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with patch("vllm.entrypoints.cli.launch.uvloop.run") as mock_uvloop_run:
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RenderSubcommand.cmd(args)
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mock_uvloop_run.assert_called_once()
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def test_cmd_launch_model_tag_overrides():
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args = argparse.Namespace(
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model_tag="tag-model",
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model="original-model",
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launch_command=lambda a: None,
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)
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LaunchSubcommand.cmd(args)
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assert args.model == "tag-model"
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def test_cmd_launch_model_tag_none():
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args = argparse.Namespace(
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model_tag=None,
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model="original-model",
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launch_command=lambda a: None,
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)
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LaunchSubcommand.cmd(args)
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assert args.model == "original-model"
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def test_cmd_dispatches():
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called = {}
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def fake_dispatch(args):
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called["args"] = args
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args = argparse.Namespace(launch_command=fake_dispatch)
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LaunchSubcommand.cmd(args)
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assert "args" in called
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# -- Module registration --
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def test_subparser_init_returns_parser():
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parser = FlexibleArgumentParser(description="test")
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subparsers = parser.add_subparsers(required=False, dest="subparser")
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result = LaunchSubcommand().subparser_init(subparsers)
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assert isinstance(result, FlexibleArgumentParser)
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def test_launch_registered_in_main():
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"""Verify that launch module is importable as a CLI module."""
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import vllm.entrypoints.cli.launch as launch_module
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assert hasattr(launch_module, "cmd_init")
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subcmds = launch_module.cmd_init()
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assert any(s.name == "launch" for s in subcmds)
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_MODEL_REVISION = "c1899de289a04d12100db370d81485cdf75e47ca"
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def _run_cli(argv: list[str]) -> None:
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from vllm.entrypoints.cli import main as cli_main
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with patch.object(sys, "argv", ["vllm", *argv]):
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cli_main.main()
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def test_snapshot_environment_contract(
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tmp_path: Path,
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monkeypatch: pytest.MonkeyPatch,
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capsys: pytest.CaptureFixture[str],
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):
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from vllm.entrypoints.serve.utils import api_utils
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monkeypatch.setattr(api_utils, "cli_env_setup", pytest.fail)
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secret = "snapshot-secret"
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monkeypatch.setenv("VLLM_API_KEY", secret)
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monkeypatch.setenv("VLLM_USER_SETTING", secret)
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monkeypatch.setenv("VLLM_WORKER_MULTIPROC_METHOD", secret)
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environment = dict(LocalSnapshotTools()._environment_identity())
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assert (
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environment["VLLM_USER_SETTING"]
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== hashlib.sha256(b"VLLM_USER_SETTING\0snapshot-secret").hexdigest()
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)
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assert (
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environment["VLLM_USER_SETTING"] != environment["VLLM_WORKER_MULTIPROC_METHOD"]
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)
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assert secret not in str(environment)
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assert "VLLM_API_KEY" not in environment
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monkeypatch.delenv("VLLM_WORKER_MULTIPROC_METHOD")
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implicit_worker_default = dict(LocalSnapshotTools()._environment_identity())
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monkeypatch.setenv("VLLM_WORKER_MULTIPROC_METHOD", "spawn")
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assert dict(LocalSnapshotTools()._environment_identity()) == implicit_worker_default
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monkeypatch.setenv("VLLM_USER_SETTING", f"{secret}-changed")
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changed_environment = dict(LocalSnapshotTools()._environment_identity())
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assert changed_environment["VLLM_USER_SETTING"] != environment["VLLM_USER_SETTING"]
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artifact = tmp_path / "snapshot"
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artifact.mkdir(mode=0o700)
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write_manifest_atomic(artifact, _manifest(environment=tuple(environment.items())))
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before = os.environ.copy()
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_run_cli(["snapshot", "inspect", str(artifact)])
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assert os.environ == before
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output = capsys.readouterr().out
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assert secret not in output
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inspected = json.loads(output)
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inspected_environment = dict(inspected["environment"])
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assert inspected_environment == environment
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tools = LocalSnapshotTools()
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monkeypatch.setattr(tools, "current_identity", lambda _uuid: _runtime_identity())
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manifest = tools.make_manifest(
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argparse.Namespace(
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hf_token=secret,
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model_tag="Qwen/Qwen3-0.6B",
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revision=_MODEL_REVISION,
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served_model_name=None,
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tokenizer_revision=None,
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),
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(
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"Qwen/Qwen3-0.6B",
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"--api-key",
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secret,
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f"{secret}-alternate",
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f"--api-key={secret}",
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"--hf-token",
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secret,
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f"--hf-token={secret}",
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),
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ProcessInventory(100, (100, 101), (101,), "GPU-abc"),
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_oracle(),
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tmp_path,
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)
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assert manifest.engine_argv == (
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"Qwen/Qwen3-0.6B",
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"--api-key",
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"***",
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"***",
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"--api-key=***",
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"--hf-token",
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"***",
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"--hf-token=***",
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)
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@pytest.mark.parametrize(
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"case",
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[
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(("--hf_token", "SECRET"), ("--hf_token", "***")),
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(("--hf_token=SECRET",), ("--hf_token=***",)),
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(("--api_key", "SECRET"), ("--api_key", "***")),
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(("--api_key=SECRET",), ("--api_key=***",)),
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(("--hf-tok", "SECRET"), ("--hf-tok", "***")),
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(("--hf-tok=SECRET",), ("--hf-tok=***",)),
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(("--hf_tok", "SECRET"), ("--hf_tok", "***")),
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(("--api-k", "SECRET", "SECOND"), ("--api-k", "***", "***")),
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(("--api-k=SECRET",), ("--api-k=***",)),
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(("--hf-overrides", "{}"), ("--hf-overrides", "{}")),
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],
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)
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def test_snapshot_manifest_redacts_accepted_secret_options(case):
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engine_argv, expected = case
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tools = create_autospec(LocalSnapshotTools, instance=True)
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tools.current_identity.return_value = _runtime_identity()
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tools._artifact_bytes.return_value = 0
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manifest = LocalSnapshotTools.make_manifest(
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tools,
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snapshot_server.parse_vllm_args(["model", *engine_argv]),
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engine_argv,
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ProcessInventory(100, (100, 101), (101,), "GPU-abc"),
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_oracle(),
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Path(),
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)
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assert manifest.engine_argv == expected
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if "SECRET" in " ".join(engine_argv):
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assert "***" in " ".join(manifest.engine_argv)
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assert "SECRET" not in " ".join(manifest.engine_argv)
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def parse_snapshot(*argv: str):
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parser = FlexibleArgumentParser()
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subparsers = parser.add_subparsers(dest="subparser", required=True)
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snapshot_cli.SnapshotSubcommand(
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create_requested=argv[:1] == ("create",)
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).subparser_init(subparsers)
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return parser.parse_args(["snapshot", *argv])
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@pytest.mark.parametrize("option", ["--snapshot-dir", "--snapshot_dir", "--snapshot-d"])
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@pytest.mark.parametrize("joined", [False, True])
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def test_snapshot_create_forwards_only_engine_options(option, joined, monkeypatch):
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directory = [f"{option}=/tmp/snapshot"] if joined else [option, "/tmp/snapshot"]
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argv = ["create", "Qwen/Qwen3-0.6B", "--revision", _MODEL_REVISION, *directory]
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args = parse_snapshot(*argv)
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monkeypatch.setattr(sys, "argv", ["vllm", "snapshot", *argv])
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child = snapshot_server.parse_vllm_args(list(_child_engine_argv(args, None)))
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assert child.model == "Qwen/Qwen3-0.6B"
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assert child.revision == _MODEL_REVISION
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assert child.enable_sleep_mode
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@pytest.mark.parametrize("model_in_cli", [False, True])
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def test_snapshot_create_config_preserves_cli_precedence(
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tmp_path, monkeypatch, model_in_cli
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):
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config = tmp_path / "engine.yaml"
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config.write_text("model: config-model\nmax-model-len: 512\ndtype: float16\n")
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model = ["Qwen/Qwen3-0.6B"] if model_in_cli else []
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argv = [
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"create",
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*model,
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"--snapshot-dir",
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str(tmp_path / "snapshot"),
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"--config",
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str(config),
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"--revision",
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_MODEL_REVISION,
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"--max-model-len",
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"1024",
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]
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args = parse_snapshot(*argv)
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monkeypatch.setattr(sys, "argv", ["vllm", "snapshot", *argv])
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child = snapshot_server.parse_vllm_args(list(_child_engine_argv(args, None)))
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assert (
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(args.model_tag or args.model)
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== child.model
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== ("Qwen/Qwen3-0.6B" if model_in_cli else "config-model")
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)
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assert args.max_model_len == child.max_model_len == 1024
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assert args.dtype == child.dtype == "float16"
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@pytest.mark.parametrize(
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("probe", "status", "output"),
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[
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(None, 0, ""),
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("nvidia-smi", 1, ""),
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("find", 1, ""),
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("ss", 1, ""),
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("nvidia-smi", 0, "12345"),
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("find", 0, "link_remap.fixture"),
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("ss", 0, "LISTEN"),
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],
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)
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def test_snapshot_e2e_cleanup_requires_successful_empty_probes(probe, status, output):
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script = (
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Path(__file__).resolve().parents[3]
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/ ".buildkite/scripts/initialized-snapshot-e2e.sh"
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)
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if not script.exists():
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pytest.skip("snapshot E2E script is not packaged in this test image")
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source = script.read_text()
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# Exercise the real probes without entering Docker/CRIU setup.
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functions = source[source.index("link_remaps() {") : source.index("wait_clean() {")]
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shell = (
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"""set -Eeuo pipefail
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GPU_UUID=fixture PORT_ONE=18001 PORT_TWO=18002 LINK_REMAP_BASELINE=''
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SNAPSHOT_PIDS=(999999999)
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nvidia-smi() { :; }
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find() { :; }
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ss() { :; }
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"""
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+ functions
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)
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if probe:
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shell += f'\n{probe}() {{ printf %s "{output}"; return {status}; }}\n'
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shell += "\nif state_clean; then exit 0; else exit 1; fi\n"
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result = subprocess.run(["bash", "-c", shell], capture_output=True, timeout=10)
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assert result.returncode == (0 if probe is None else 1), result.stderr
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def test_snapshot_create_cli_accepts_only_pinned_compact_mode(
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monkeypatch: pytest.MonkeyPatch,
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):
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monkeypatch.setattr(snapshot_cli.platform, "system", lambda: "Linux")
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monkeypatch.setattr(snapshot_cli.platform, "machine", lambda: "x86_64")
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base = ("create", "Qwen/Qwen3-0.6B", "--snapshot-dir=/tmp/snapshot")
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compact = parse_snapshot(*base, "--revision", _MODEL_REVISION)
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snapshot_cli.validate_create_args(compact)
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assert compact.model_tag == "Qwen/Qwen3-0.6B"
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dispatched: list[argparse.Namespace] = []
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monkeypatch.setattr(snapshot_cli, "run_create", dispatched.append)
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_run_cli(["snapshot", *base, "--revision", _MODEL_REVISION])
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assert dispatched[0].revision == _MODEL_REVISION
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|
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@pytest.mark.parametrize(
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("attribute", "value", "message"),
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[
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("prefill_context_parallel_size", 2, "prefill context parallel size 1"),
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("model_tag", None, "immutable remote model"),
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("logprobs_mode", "raw_logits", "log-probability mode"),
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("speculative_config", {}, "does not support speculative decoding"),
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("spec_method", "ngram", "does not support speculative decoding"),
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("spec_model", "draft-model", "does not support speculative decoding"),
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("spec_tokens", 3, "does not support speculative decoding"),
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],
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)
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def test_snapshot_create_rejects_invalid_config(
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attribute: str,
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value: object,
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message: str,
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tmp_path: Path,
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):
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args = parse_snapshot(
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"create",
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"Qwen/Qwen3-0.6B",
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"--snapshot-dir=/tmp/snapshot",
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"--revision",
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_MODEL_REVISION,
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)
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if attribute == "model_tag":
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local_model = tmp_path / "model"
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local_model.mkdir()
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value = str(local_model)
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setattr(args, attribute, value)
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with pytest.raises(ValueError, match=message):
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snapshot_cli.validate_create_args(args)
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|
|
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def _oracle(
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token_ids: tuple[int, ...] = (12095,),
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text: str = " Paris",
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logprob: float = -0.125,
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) -> Oracle:
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return Oracle(token_ids, text, logprob)
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|
|
|
|
def _manifest(**changes: object) -> SnapshotManifest:
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manifest = SnapshotManifest(
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schema_version=1,
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boundary="post-engine-init-reloadable-state-released",
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created_at="2026-08-06T00:00:00Z",
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artifact_bytes=8,
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vllm_version="0.1.dev1+snapshot",
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python_version="3.12.3",
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torch_version="2.9.0",
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cuda_runtime="12.9",
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driver_version="575.57.08",
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criu_version="4.1",
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cuda_checkpoint_sha256="a" * 64,
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kernel_release="6.8.0",
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host_id="host-a",
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gpu_name="NVIDIA A10",
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gpu_uuid="GPU-abc",
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model="Qwen/Qwen3-0.6B",
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served_model_name="Qwen/Qwen3-0.6B",
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model_revision="model-sha",
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tokenizer_revision="tokenizer-sha",
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engine_argv=("Qwen/Qwen3-0.6B",),
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environment=(("VLLM_USE_V1", "1"),),
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process_tree=(100, 101),
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cuda_holders=(101,),
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oracle_token_ids=(12095,),
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oracle_text=" Paris",
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oracle_sampled_token_logprob=-0.125,
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)
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return SnapshotManifest.model_validate(
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{**manifest.model_dump(mode="python"), **changes}, strict=True
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)
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|
|
|
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def _runtime_identity(**changes: object) -> Any:
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fields = SnapshotRuntimeIdentity.model_fields.keys()
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payload = _manifest().model_dump(mode="python", include=fields)
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return SnapshotRuntimeIdentity.model_validate({**payload, **changes}, strict=True)
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|
|
|
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def _fake_snapshot_tools() -> Any:
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tools = create_autospec(LocalSnapshotTools, instance=True)
|
|
tools.launch_child.return_value = 100
|
|
tools.wait_ready.return_value = _oracle()
|
|
tools.inventory.return_value = ProcessInventory(100, (100, 101), (101,), "GPU-abc")
|
|
|
|
tools.current_identity.side_effect = lambda _gpu_uuid: _runtime_identity()
|
|
tools.restore.return_value = 100
|
|
tools.request_oracle.return_value = _oracle()
|
|
return tools
|
|
|
|
|
|
@pytest.mark.parametrize("value", ["0", "-1", "nan", "inf"])
|
|
def test_snapshot_timeout_must_be_positive_and_finite(
|
|
value: str, monkeypatch: pytest.MonkeyPatch
|
|
):
|
|
monkeypatch.setenv("VLLM_SNAPSHOT_TIMEOUT_S", value)
|
|
with pytest.raises(ValueError, match="positive finite number"):
|
|
LocalSnapshotTools()
|
|
|
|
|
|
def test_snapshot_create_abort_reaps_after_process_group_cleanup(
|
|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
|
|
):
|
|
tools = LocalSnapshotTools()
|
|
process = subprocess.Popen(
|
|
[sys.executable, "-c", "raise SystemExit(1)"],
|
|
stdin=subprocess.DEVNULL,
|
|
stdout=subprocess.DEVNULL,
|
|
stderr=subprocess.DEVNULL,
|
|
start_new_session=True,
|
|
)
|
|
tools._children[process.pid] = process
|
|
(tmp_path / "child.log").write_text("root failed")
|
|
killed: list[tuple[int, signal.Signals]] = []
|
|
monkeypatch.setattr(
|
|
os,
|
|
"killpg",
|
|
lambda pid, sig: killed.append((pid, sig)),
|
|
)
|
|
monkeypatch.setattr(os, "waitid", lambda *_args: object(), raising=False)
|
|
|
|
try:
|
|
with pytest.raises(SnapshotCreateError, match="root failed"):
|
|
tools.wait_ready(tmp_path, process.pid)
|
|
assert process.returncode is None
|
|
tools.abort_create(process.pid)
|
|
finally:
|
|
if process.pid in tools._children:
|
|
tools.abort_create(process.pid)
|
|
|
|
assert killed == [(process.pid, signal.SIGKILL)]
|
|
assert process.pid not in tools._children
|
|
|
|
|
|
def _supply_waitid(monkeypatch: pytest.MonkeyPatch) -> None:
|
|
"""`wait_ready` binds Linux-only `os.waitid` before it reads the marker."""
|
|
monkeypatch.setattr(os, "waitid", lambda *_args: None, raising=False)
|
|
|
|
|
|
def test_snapshot_wait_ready_reads_back_the_oracle_the_child_wrote(
|
|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
|
|
):
|
|
_supply_waitid(monkeypatch)
|
|
snapshot_server.write_ready_atomic(tmp_path / "ready.json", _oracle())
|
|
|
|
assert LocalSnapshotTools().wait_ready(tmp_path, os.getpid()) == _oracle()
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"payload",
|
|
[
|
|
{"token_ids": [12095], "sampled_token_logprob": -0.125},
|
|
{"token_ids": ["12095"], "text": " Paris", "sampled_token_logprob": -0.125},
|
|
],
|
|
)
|
|
def test_snapshot_wait_ready_rejects_a_malformed_marker(
|
|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch, payload: dict[str, object]
|
|
):
|
|
_supply_waitid(monkeypatch)
|
|
(tmp_path / "ready.json").write_text(json.dumps(payload))
|
|
|
|
with pytest.raises(SnapshotCreateError, match="ready marker invalid"):
|
|
LocalSnapshotTools().wait_ready(tmp_path, os.getpid())
|
|
|
|
|
|
def test_snapshot_create_abort_rejects_surviving_process_group(
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
):
|
|
tools = LocalSnapshotTools()
|
|
process = create_autospec(subprocess.Popen, instance=True)
|
|
process.wait.side_effect = subprocess.TimeoutExpired("snapshot child", 10)
|
|
tools._children[100] = process
|
|
monkeypatch.setattr(os, "killpg", lambda _pid, _sig: None)
|
|
|
|
with pytest.raises(SnapshotCreateError, match="survived SIGKILL"):
|
|
tools.abort_create(100)
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_snapshot_child_rejects_mismatch_before_publication(
|
|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
|
|
):
|
|
from vllm.entrypoints.launchers.api_server import entry as api_server
|
|
|
|
canaries = iter((_oracle(), _oracle((42,), " Lyon")))
|
|
|
|
@asynccontextmanager
|
|
async def engine_context():
|
|
yield object()
|
|
|
|
async def next_canary(_engine: object) -> Oracle:
|
|
return next(canaries)
|
|
|
|
async def return_none(_engine: object) -> None:
|
|
return None
|
|
|
|
monkeypatch.setattr(
|
|
api_server, "build_async_engine_client", lambda _args: engine_context()
|
|
)
|
|
monkeypatch.setattr(snapshot_server, "run_engine_canary", next_canary)
|
|
monkeypatch.setattr(snapshot_server, "_release_reloadable_state", return_none)
|
|
monkeypatch.setattr(snapshot_server, "_restore_reloadable_state", return_none)
|
|
monkeypatch.setattr(snapshot_server, "detach_snapshot_streams", lambda: None)
|
|
monkeypatch.setattr(
|
|
snapshot_server,
|
|
"write_ready_atomic",
|
|
lambda *_args: pytest.fail("mismatched snapshot was published"),
|
|
)
|
|
control = snapshot_server.ControlArgs(
|
|
ready_file=tmp_path / "ready.json",
|
|
release_file=tmp_path / "release.json",
|
|
release_timeout_s=1,
|
|
)
|
|
with pytest.raises(SnapshotCanaryError, match="rehearsal changed"):
|
|
await snapshot_server.run_vllm_snapshot_child(control, argparse.Namespace())
|
|
|
|
|
|
def test_snapshot_release_marker_ignores_unknown_keys(tmp_path: Path):
|
|
marker = tmp_path / "release.json"
|
|
marker.write_text(json.dumps({"release": True, "port": 8000, "unknown": 1}))
|
|
|
|
listener = snapshot_server.read_release_marker(marker)
|
|
|
|
assert listener == snapshot_server.ListenerConfig(host=None, port=8000)
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"payload",
|
|
[
|
|
["release"],
|
|
{"port": 8000},
|
|
{"release": "true", "port": 8000},
|
|
{"release": 1, "port": 8000},
|
|
{"release": True, "port": 0},
|
|
{"release": True, "port": 70000},
|
|
{"release": True, "port": True},
|
|
{"release": True, "port": "8000"},
|
|
{"release": True, "port": 8000, "host": 5},
|
|
],
|
|
)
|
|
def test_snapshot_release_marker_rejects_an_invalid_payload(
|
|
tmp_path: Path, payload: object
|
|
):
|
|
marker = tmp_path / "release.json"
|
|
marker.write_text(json.dumps(payload))
|
|
|
|
with pytest.raises(snapshot_server.SnapshotBarrierError, match="release marker"):
|
|
snapshot_server.read_release_marker(marker)
|
|
|
|
|
|
def test_snapshot_create_rolls_back_failed_dump(tmp_path: Path):
|
|
target = tmp_path / "snapshot"
|
|
tools = _fake_snapshot_tools()
|
|
tools.dump.side_effect = RuntimeError("dump failed")
|
|
with pytest.raises(RuntimeError, match="dump failed"):
|
|
create_snapshot(
|
|
argparse.Namespace(snapshot_dir=str(target), model_tag="Qwen/Qwen3-0.6B"),
|
|
tools=tools,
|
|
)
|
|
tools.abort_create.assert_called_once_with(100)
|
|
assert not target.exists()
|
|
|
|
|
|
def _restore_fixture(tmp_path: Path) -> argparse.Namespace:
|
|
artifact = tmp_path / "snapshot"
|
|
artifact.mkdir(mode=0o700)
|
|
write_manifest_atomic(artifact, _manifest())
|
|
return argparse.Namespace(snapshot_dir=str(artifact), host="127.0.0.1", port=9000)
|
|
|
|
|
|
def test_snapshot_restore_rejects_identity_mismatch(tmp_path: Path):
|
|
args = _restore_fixture(tmp_path)
|
|
|
|
identity_mismatch = _fake_snapshot_tools()
|
|
identity_mismatch.current_identity.side_effect = lambda _gpu_uuid: (
|
|
_runtime_identity(vllm_version="different")
|
|
)
|
|
with pytest.raises(SnapshotCompatibilityError, match="vllm_version"):
|
|
restore_snapshot(args, tools=identity_mismatch)
|
|
identity_mismatch.restore.assert_not_called()
|
|
|
|
|
|
def test_snapshot_identity_mismatch_names_every_differing_field():
|
|
with pytest.raises(SnapshotCompatibilityError) as mismatch:
|
|
validate_identity(
|
|
_manifest(),
|
|
_runtime_identity(vllm_version="different", gpu_uuid="GPU-other"),
|
|
)
|
|
|
|
assert str(mismatch.value) == "snapshot mismatch: vllm_version, gpu_uuid"
|
|
|
|
|
|
def test_snapshot_restore_cleans_oracle_mismatch(tmp_path: Path):
|
|
args = _restore_fixture(tmp_path)
|
|
oracle_mismatch = _fake_snapshot_tools()
|
|
oracle_mismatch.request_oracle.return_value = _oracle(logprob=-0.5)
|
|
with pytest.raises(SnapshotRestoreError, match="oracle mismatch"):
|
|
restore_snapshot(args, tools=oracle_mismatch)
|
|
oracle_mismatch.cleanup.assert_called_once()
|
|
oracle_mismatch.complete_restore.assert_not_called()
|
|
assert oracles_match(_oracle(logprob=-100.0), _oracle(logprob=-100.0005))
|
|
assert not oracles_match(_oracle(logprob=-100.0), _oracle(logprob=-100.002))
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
("invalid_update", "diagnostic"),
|
|
[
|
|
({"unexpected": True}, "unexpected"),
|
|
({"schema_version": True}, "schema_version"),
|
|
({"boundary": "unknown"}, "boundary"),
|
|
({"process_tree": [100, 100]}, "root"),
|
|
({"cuda_holders": [999]}, "root"),
|
|
({"oracle_token_ids": [1, 2]}, "oracle_token_ids"),
|
|
({"oracle_sampled_token_logprob": 0}, "oracle_sampled_token_logprob"),
|
|
(
|
|
{"oracle_sampled_token_logprob": float("nan")},
|
|
"oracle_sampled_token_logprob",
|
|
),
|
|
],
|
|
)
|
|
def test_snapshot_manifest_validation(
|
|
tmp_path: Path,
|
|
invalid_update: dict[str, object],
|
|
diagnostic: str,
|
|
):
|
|
artifact = tmp_path / "snapshot"
|
|
artifact.mkdir(mode=0o700)
|
|
write_manifest_atomic(artifact, _manifest())
|
|
invalid = _manifest().model_dump(mode="json")
|
|
invalid.update(invalid_update)
|
|
(artifact / "manifest.json").write_text(json.dumps(invalid))
|
|
with pytest.raises(
|
|
SnapshotCompatibilityError,
|
|
match=f"invalid snapshot manifest: {diagnostic}",
|
|
):
|
|
read_manifest(artifact)
|
|
|
|
|
|
def _local_restore_artifact(tmp_path: Path, name: str = "snapshot") -> Path:
|
|
artifact = tmp_path / name
|
|
artifact.mkdir(mode=0o700)
|
|
(artifact / "child.log").write_bytes(b"startup log")
|
|
(artifact / "child.log.snapshot-size").write_text("11\n")
|
|
return artifact
|
|
|
|
|
|
def _mark_snapshot_pids_free(monkeypatch: pytest.MonkeyPatch) -> list[int]:
|
|
probed_pids: list[int] = []
|
|
|
|
def missing(pid: int, _signal: int) -> None:
|
|
probed_pids.append(pid)
|
|
raise ProcessLookupError
|
|
|
|
monkeypatch.setattr(snapshot_runtime.os, "kill", missing)
|
|
return probed_pids
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
("probe_error", "diagnostic"),
|
|
[
|
|
(None, "already occupied: 100"),
|
|
(PermissionError(), "already occupied: 100"),
|
|
(OSError("probe failed"), "availability probe failed: 100"),
|
|
],
|
|
)
|
|
def test_snapshot_restore_rejects_unavailable_pid_before_mutation(
|
|
tmp_path: Path,
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
probe_error: OSError | None,
|
|
diagnostic: str,
|
|
):
|
|
args = _restore_fixture(tmp_path)
|
|
artifact = Path(args.snapshot_dir)
|
|
(artifact / "child.log").write_bytes(b"startup log")
|
|
(artifact / "release.json").write_bytes(b"release sentinel")
|
|
before = {path.name: path.read_bytes() for path in artifact.iterdir()}
|
|
tools = LocalSnapshotTools()
|
|
|
|
def fail_probe(_pid: int, _signal: int) -> None:
|
|
if probe_error is not None:
|
|
raise probe_error
|
|
|
|
monkeypatch.setattr(snapshot_runtime.os, "kill", fail_probe)
|
|
monkeypatch.setattr(tools, "preflight", lambda *_args: None)
|
|
monkeypatch.setattr(tools, "current_identity", lambda _uuid: _runtime_identity())
|
|
monkeypatch.setattr(tools, "_criu", lambda *_args: pytest.fail("CRIU called"))
|
|
|
|
with pytest.raises(SnapshotRestoreError, match=diagnostic):
|
|
restore_snapshot(args, tools=tools)
|
|
assert {path.name: path.read_bytes() for path in artifact.iterdir()} == before
|
|
|
|
|
|
@pytest.mark.parametrize("mode", ["pinned", "unpinned", "cleanup-fails"])
|
|
def test_snapshot_restore_terminates_only_a_pinned_tree(
|
|
tmp_path: Path,
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
mode: str,
|
|
):
|
|
_mark_snapshot_pids_free(monkeypatch)
|
|
artifact = _local_restore_artifact(tmp_path)
|
|
manifest = _manifest()
|
|
root_pid = manifest.process_tree[0]
|
|
tools = LocalSnapshotTools()
|
|
terminated: list[int] = []
|
|
|
|
def terminate_and_wait(pid: int) -> None:
|
|
terminated.append(pid)
|
|
if mode == "cleanup-fails":
|
|
raise SnapshotRestoreError("restored process cleanup is incomplete")
|
|
tools._restored_processes.pop(pid)
|
|
|
|
def pin(
|
|
_artifact: Path, process_tree: tuple[int, ...], _holders: tuple[int, ...]
|
|
) -> None:
|
|
if mode == "unpinned":
|
|
raise SnapshotRestoreError(
|
|
"restored session does not match the captured process tree"
|
|
)
|
|
tools._restored_processes[process_tree[0]] = ()
|
|
|
|
monkeypatch.setattr(tools, "cleanup", terminate_and_wait)
|
|
monkeypatch.setattr(tools, "_pin_restored_tree", pin)
|
|
monkeypatch.setattr(tools, "_criu", lambda *_args: None)
|
|
monkeypatch.setattr(
|
|
tools,
|
|
"_run",
|
|
lambda command, **_kwargs: subprocess.CompletedProcess(command, 0, "333\n", ""),
|
|
)
|
|
|
|
with pytest.raises(SnapshotRestoreError, match="does not match") as failure:
|
|
tools.restore(artifact, manifest)
|
|
|
|
# A pinned tree is ours: it must be terminated and waited for, not left to
|
|
# honour the abort marker. An unpinned PID is never signalled.
|
|
assert terminated == ([] if mode == "unpinned" else [root_pid])
|
|
if mode == "cleanup-fails":
|
|
# The failure to terminate is reported beside the primary error, and a
|
|
# tree that may still be running stays pinned.
|
|
assert "restore cleanup failed" in str(failure.value)
|
|
assert tools._restored_processes == {root_pid: ()}
|
|
else:
|
|
assert tools._restored_processes == {}
|
|
assert json.loads((artifact / "release.json").read_text())["release"] is False
|
|
|
|
|
|
def test_snapshot_private_path_and_link_remap_security(
|
|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
|
|
):
|
|
_mark_snapshot_pids_free(monkeypatch)
|
|
real = tmp_path / "real"
|
|
real.mkdir(mode=0o700)
|
|
linked = tmp_path / "linked"
|
|
linked.symlink_to(real, target_is_directory=True)
|
|
with pytest.raises(SnapshotSecurityError, match="symlink"):
|
|
validate_artifact_root(linked, creating=False)
|
|
|
|
unsafe = tmp_path / "unsafe"
|
|
unsafe.mkdir()
|
|
unsafe.chmod(0o777)
|
|
with pytest.raises(SnapshotSecurityError, match="world-writable"):
|
|
validate_artifact_root(unsafe / "snapshot", creating=True)
|
|
|
|
artifact = _local_restore_artifact(tmp_path)
|
|
saved_remaps = artifact / "link-remaps"
|
|
saved_remaps.mkdir()
|
|
(saved_remaps / "link_remap.270").write_bytes(b"semaphore state")
|
|
shm_dir = tmp_path / "shm"
|
|
shm_dir.mkdir()
|
|
target = shm_dir / "link_remap.270"
|
|
replacement = tmp_path / "replacement"
|
|
replacement.write_bytes(b"semaphore state")
|
|
target.symlink_to(replacement)
|
|
tools = LocalSnapshotTools()
|
|
tools.shm_dir = shm_dir
|
|
monkeypatch.setattr(tools, "_criu", lambda *_args: pytest.fail("CRIU called"))
|
|
with pytest.raises(SnapshotRestoreError, match="conflicting CRIU link remap"):
|
|
tools.restore(artifact, _manifest())
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
("blocked_state", "message"),
|
|
[("tcp", "external established TCP"), ("io_uring", "kernel.io_uring_disabled=1")],
|
|
)
|
|
def test_snapshot_rejects_unsafe_process_state_before_criu(
|
|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch, blocked_state: str, message: str
|
|
):
|
|
tools = LocalSnapshotTools()
|
|
monkeypatch.setattr(tools, "_tree_pids", lambda _root_pid: (100, 101))
|
|
monkeypatch.setattr(tools, "_cuda_process_rows", lambda: ("101, GPU-abc",))
|
|
monkeypatch.setattr(
|
|
tools,
|
|
"_descriptor_inventory",
|
|
lambda _tree: (
|
|
(101,) if blocked_state == "io_uring" else (),
|
|
{41: 101},
|
|
),
|
|
)
|
|
tcp_record = _TcpSocketRecord(
|
|
family="AF_INET",
|
|
local_raw="3C00000A:D6F6",
|
|
remote_raw="01010101:01BB" if blocked_state == "tcp" else "00000000:0000",
|
|
inode=41,
|
|
)
|
|
monkeypatch.setattr(tools, "_tcp_records", lambda: (tcp_record,))
|
|
with pytest.raises(SnapshotCreateError, match=message) as excinfo:
|
|
tools.inventory(100, tmp_path)
|
|
if blocked_state == "tcp":
|
|
assert "pid 101" in str(excinfo.value)
|
|
assert "1.1.1.1:443" in str(excinfo.value)
|
|
|
|
|
|
def test_decode_endpoint_families():
|
|
assert _decode_endpoint("AF_INET", "3C00000A:D6F6") == "10.0.0.60:55030"
|
|
assert (
|
|
_decode_endpoint("AF_INET6", "00000000000000000000000001000000:01BB")
|
|
== "[::1]:443"
|
|
)
|
|
|
|
|
|
def test_tcp_records_skips_missing_tables(tmp_path, monkeypatch):
|
|
tcp, tcp6 = tmp_path / "tcp", tmp_path / "tcp6"
|
|
contents = "header\n0: 0100007F:1F90 00000000:0000 01 0 0 0 0 0 41\n"
|
|
tcp.write_text(contents)
|
|
tables = (("AF_INET", tcp), ("AF_INET6", tcp6))
|
|
monkeypatch.setattr(snapshot_runtime, "_TCP_TABLES", tables)
|
|
|
|
tools = LocalSnapshotTools()
|
|
assert tuple(record.family for record in tools._tcp_records()) == ("AF_INET",)
|
|
|
|
tcp6.write_text(contents)
|
|
families = tuple(record.family for record in tools._tcp_records())
|
|
assert families == ("AF_INET", "AF_INET6")
|
|
|
|
|
|
def test_snapshot_manifest_records_external_cache_files(tmp_path: Path):
|
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artifact = tmp_path / "snapshot"
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artifact.mkdir(mode=0o700)
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recorded = (
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(str(tmp_path / "kernel.so"), "b" * 64),
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(str(tmp_path / "launcher.lock"), "locked"),
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)
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write_manifest_atomic(artifact, _manifest(external_cache_files=recorded))
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|
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assert read_manifest(artifact).external_cache_files == recorded
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|
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# A manifest written before this field existed still loads.
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legacy = _manifest().model_dump(mode="json")
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del legacy["external_cache_files"]
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(artifact / "manifest.json").write_text(json.dumps(legacy))
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|
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assert read_manifest(artifact).external_cache_files == ()
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|
|
|
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|
def _pin_generated_cache_roots(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
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"""Keep the resolver off whatever cache roots the host running this has."""
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monkeypatch.setenv("VLLM_CACHE_ROOT", str(tmp_path / "vllm_cache"))
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monkeypatch.setenv("TRITON_CACHE_DIR", str(tmp_path / "triton_cache_default"))
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monkeypatch.setenv("TORCHINDUCTOR_CACHE_DIR", str(tmp_path / "inductor_cache"))
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|
|
|
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def _unreadable(_path: Path) -> str:
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raise OSError("cache file is unreadable")
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|
|
|
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|
def test_snapshot_inventory_records_open_generated_cache_files(
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|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
|
|
):
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|
cache_root = tmp_path / "triton_cache"
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|
cache_root.mkdir()
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|
kernel = cache_root / "kernel.so"
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kernel.write_bytes(b"compiled kernel")
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|
lock = cache_root / "launcher.lock"
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|
lock.write_bytes(b"held by pid 100")
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|
weights = tmp_path / "model.safetensors"
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|
weights.write_bytes(b"weights")
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|
artifact = tmp_path / "snapshot"
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|
artifact.mkdir(mode=0o700)
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|
(artifact / "child.log.lock").write_bytes(b"")
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|
_pin_generated_cache_roots(monkeypatch, tmp_path)
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|
monkeypatch.setenv("TRITON_CACHE_DIR", str(cache_root))
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|
|
|
targets = {
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|
100: (str(kernel), str(weights), "socket:[41]"),
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|
101: (str(lock), str(cache_root), str(artifact / "child.log.lock")),
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|
102: (f"{cache_root / 'evicted.so'} (deleted)",),
|
|
}
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|
tools = LocalSnapshotTools()
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|
monkeypatch.setattr(tools, "_tree_pids", lambda _root_pid: (100, 101, 102))
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|
monkeypatch.setattr(tools, "_descriptor_targets", lambda pid: targets[pid])
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|
monkeypatch.setattr(tools, "_cuda_process_rows", lambda: ("101, GPU-abc",))
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|
monkeypatch.setattr(tools, "_tcp_records", lambda: ())
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|
monkeypatch.setattr(tools, "current_identity", lambda _uuid: _runtime_identity())
|
|
|
|
manifest = tools.make_manifest(
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|
argparse.Namespace(
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|
model_tag="Qwen/Qwen3-0.6B",
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|
revision=_MODEL_REVISION,
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|
served_model_name=None,
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|
tokenizer_revision=None,
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|
),
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|
("Qwen/Qwen3-0.6B",),
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|
tools.inventory(100, artifact),
|
|
_oracle(),
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|
artifact,
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|
)
|
|
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|
# Weights, sockets, the cache directory itself, files inside the artifact,
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|
# and deleted targets that CRIU remaps are all left out.
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|
assert manifest.external_cache_files == (
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|
(str(kernel), hashlib.sha256(b"compiled kernel").hexdigest()),
|
|
(str(lock), "locked"),
|
|
)
|
|
|
|
|
|
def test_snapshot_inventory_marks_a_cache_file_it_cannot_read(
|
|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
|
|
):
|
|
cache_root = tmp_path / "triton_cache"
|
|
cache_root.mkdir()
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|
kernel = cache_root / "kernel.so"
|
|
kernel.write_bytes(b"compiled kernel")
|
|
lock = cache_root / "launcher.lock"
|
|
lock.write_bytes(b"held by pid 100")
|
|
artifact = tmp_path / "snapshot"
|
|
artifact.mkdir(mode=0o700)
|
|
_pin_generated_cache_roots(monkeypatch, tmp_path)
|
|
monkeypatch.setenv("TRITON_CACHE_DIR", str(cache_root))
|
|
|
|
tools = LocalSnapshotTools()
|
|
monkeypatch.setattr(tools, "_tree_pids", lambda _root_pid: (100,))
|
|
monkeypatch.setattr(
|
|
tools, "_descriptor_targets", lambda _pid: (str(kernel), str(lock))
|
|
)
|
|
monkeypatch.setattr(tools, "_cuda_process_rows", lambda: ("100, GPU-abc",))
|
|
monkeypatch.setattr(tools, "_tcp_records", lambda: ())
|
|
monkeypatch.setattr(tools, "_sha256", _unreadable)
|
|
|
|
# A file that cannot be digested keeps its own marker, so the manifest says
|
|
# which entries restore can check for existence only.
|
|
assert tools.inventory(100, artifact).external_cache_files == (
|
|
(str(kernel), "unreadable"),
|
|
(str(lock), "locked"),
|
|
)
|
|
|
|
|
|
def test_snapshot_inventory_matches_resolved_cache_roots_not_siblings(
|
|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
|
|
):
|
|
# Descriptor targets come back kernel-canonical, so the fixture must be too.
|
|
base = Path(os.path.realpath(tmp_path))
|
|
real_cache = base / "mnt_cache"
|
|
real_cache.mkdir()
|
|
kernel = real_cache / "kernel.so"
|
|
kernel.write_bytes(b"compiled kernel")
|
|
linked_cache = base / "linked_cache"
|
|
linked_cache.symlink_to(real_cache, target_is_directory=True)
|
|
sibling = base / "vllm_cache-backup"
|
|
sibling.mkdir()
|
|
stale = sibling / "stale.so"
|
|
stale.write_bytes(b"stale kernel")
|
|
artifact = base / "snapshot"
|
|
artifact.mkdir(mode=0o700)
|
|
|
|
_pin_generated_cache_roots(monkeypatch, base)
|
|
monkeypatch.setenv("TRITON_CACHE_DIR", str(linked_cache))
|
|
|
|
tools = LocalSnapshotTools()
|
|
monkeypatch.setattr(tools, "_tree_pids", lambda _root_pid: (100,))
|
|
monkeypatch.setattr(
|
|
tools, "_descriptor_targets", lambda _pid: (str(kernel), str(stale))
|
|
)
|
|
monkeypatch.setattr(tools, "_cuda_process_rows", lambda: ("100, GPU-abc",))
|
|
monkeypatch.setattr(tools, "_tcp_records", lambda: ())
|
|
|
|
# A cache root reached through a symlink still covers the file the kernel
|
|
# reports by its real path, and a directory that merely shares the root's
|
|
# name prefix is not part of the cache at all.
|
|
assert tools.inventory(100, artifact).external_cache_files == (
|
|
(str(kernel), hashlib.sha256(b"compiled kernel").hexdigest()),
|
|
)
|
|
|
|
|
|
def test_snapshot_restore_rejects_rotated_cache_file_before_mutation(
|
|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
|
|
):
|
|
_mark_snapshot_pids_free(monkeypatch)
|
|
kernel = tmp_path / "kernel.so"
|
|
kernel.write_bytes(b"compiled kernel")
|
|
lock = tmp_path / "launcher.lock"
|
|
lock.write_bytes(b"held by pid 100")
|
|
manifest = _manifest(
|
|
external_cache_files=(
|
|
(str(kernel), hashlib.sha256(b"compiled kernel").hexdigest()),
|
|
(str(lock), "locked"),
|
|
)
|
|
)
|
|
artifact = _local_restore_artifact(tmp_path)
|
|
before = {path.name: path.read_bytes() for path in artifact.iterdir()}
|
|
tools = LocalSnapshotTools()
|
|
monkeypatch.setattr(tools, "_criu", lambda *_args: pytest.fail("CRIU called"))
|
|
|
|
kernel.write_bytes(b"recompiled kernel")
|
|
with pytest.raises(SnapshotRestoreError, match="changed since capture") as changed:
|
|
tools.restore(artifact, manifest)
|
|
assert str(kernel) in str(changed.value)
|
|
|
|
# Restoring the digest gets past the first entry, so the lock file is only
|
|
# checked for existence: the second failure proves the first one passed.
|
|
kernel.write_bytes(b"compiled kernel")
|
|
lock.unlink()
|
|
with pytest.raises(SnapshotRestoreError, match="vanished since capture") as gone:
|
|
tools.restore(artifact, manifest)
|
|
assert str(lock) in str(gone.value)
|
|
|
|
assert {path.name: path.read_bytes() for path in artifact.iterdir()} == before
|
|
|
|
|
|
def test_snapshot_restore_rejects_a_cache_file_it_cannot_read(
|
|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
|
|
):
|
|
_mark_snapshot_pids_free(monkeypatch)
|
|
kernel = tmp_path / "kernel.so"
|
|
kernel.write_bytes(b"compiled kernel")
|
|
manifest = _manifest(
|
|
external_cache_files=(
|
|
(str(kernel), hashlib.sha256(b"compiled kernel").hexdigest()),
|
|
)
|
|
)
|
|
artifact = _local_restore_artifact(tmp_path)
|
|
tools = LocalSnapshotTools()
|
|
monkeypatch.setattr(tools, "_criu", lambda *_args: pytest.fail("CRIU called"))
|
|
monkeypatch.setattr(tools, "_sha256", _unreadable)
|
|
|
|
# A recorded digest that cannot be read again is a failed check, not a file
|
|
# to wave through on existence.
|
|
with pytest.raises(
|
|
SnapshotRestoreError, match="unreadable since capture"
|
|
) as blocked:
|
|
tools.restore(artifact, manifest)
|
|
assert str(kernel) in str(blocked.value)
|
|
|
|
|
|
def test_snapshot_runtime_installer_logs_the_failing_exit_code():
|
|
installer = Path(__file__).parents[3] / "tools" / "install_snapshot_runtime.sh"
|
|
if not installer.is_file():
|
|
pytest.skip("installer script is not shipped in this test image")
|
|
timing = [
|
|
line
|
|
for line in installer.read_text().splitlines()
|
|
if line.startswith(("_snapshot_install_started=", "trap "))
|
|
]
|
|
assert len(timing) == 2
|
|
|
|
result = subprocess.run(
|
|
["bash", "-c", "\n".join([*timing, "exit 7"])],
|
|
capture_output=True,
|
|
text=True,
|
|
)
|
|
|
|
assert result.returncode == 7
|
|
assert "(exit 7)" in result.stdout
|