1190 lines
49 KiB
Python
1190 lines
49 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright contributors to the vLLM-Omni project
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"""Crash-safe node-local filesystem implementation of HostWeightStore."""
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from __future__ import annotations
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import contextlib
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import errno
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import hashlib
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import json
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import os
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import shutil
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import stat
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import time
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import uuid
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from collections import defaultdict
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from collections.abc import Callable
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from pathlib import Path
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from typing import Protocol
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import regex as re
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import torch
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from safetensors import SafetensorError, safe_open
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from ..config import CapacityPolicy, IntegrityPolicy, StorageClass, StorageDomainPolicy, ValidationLevel
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from ..errors import FailureCode, HostWeightError, HostWeightFailure, ResolutionStage
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from ..identity import CanonicalJson, WeightArtifactIdentity, canonical_json
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from ..inspection import (
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ArtifactInspection,
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ArtifactInventoryEntry,
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ArtifactInventoryState,
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DomainInspection,
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)
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from ..lease import HostWeightLease, LeaseProvenance, MappedHostRegion
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from ..manifest import ManifestValidationError, PublicationMarker, TensorManifestEntry, WeightManifest
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from ..outcomes import StoreResult, StoreStatus
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from ..protocols import BuildRequest, CoordinationScope, WeightProducer
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from .locks import FileLock, FileLockTimeoutError, lock_is_active
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from .writer import FilesystemArtifactWriter
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_DOMAIN_FILE = "domain.json"
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_DOMAIN_POLICY_FILE = "domain-policy.json"
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_MANIFEST_FILE = "manifest.json"
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_READY_FILE = "READY.json"
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_MAX_METADATA_BYTES = 64 * 1024**2
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_FILE_HASH_CHUNK_BYTES = 8 * 1024**2
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_ARTIFACT_KEY_RE = re.compile(r"[0-9a-f]{64}")
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_LOCAL_DISK_FILESYSTEM_TYPES = frozenset(
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{
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"aufs",
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"bcachefs",
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"btrfs",
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"erofs",
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"ext2",
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"ext3",
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"ext4",
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"f2fs",
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"fuseblk",
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"jfs",
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"ntfs3",
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"overlay",
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"reiserfs",
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"rootfs",
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"xfs",
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"zfs",
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}
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)
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_REMOTE_FILESYSTEM_TYPES = frozenset(
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{
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"9p",
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"afs",
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"beegfs",
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"ceph",
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"cifs",
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"fuse.gcsfuse",
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"fuse.s3fs",
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"fuse.sshfs",
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"gcsfuse",
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"glusterfs",
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"gpfs",
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"lustre",
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"nfs",
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"nfs4",
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"orangefs",
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"panfs",
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"s3fs",
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"smb3",
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"sshfs",
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"virtiofs",
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"wekafs",
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}
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)
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class _ExitContext(Protocol):
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def __exit__(self, exc_type: None, exc: None, _traceback: None) -> object: ...
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def _make_fd_closer(fd: int) -> Callable[[], None]:
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def close() -> None:
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os.close(fd)
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return close
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def _make_context_closer(context: _ExitContext) -> Callable[[], None]:
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def close() -> None:
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context.__exit__(None, None, None)
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return close
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def _failure(
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stage: ResolutionStage,
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code: FailureCode,
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message: str,
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*,
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retryable: bool = False,
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details: object | None = None,
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) -> HostWeightFailure:
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return HostWeightFailure(
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stage=stage,
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code=code,
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retryable=retryable,
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message=message,
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details=CanonicalJson.from_value({} if details is None else details),
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)
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def _fsync_directory(path: Path) -> None:
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fd = os.open(path, os.O_RDONLY | os.O_DIRECTORY | os.O_CLOEXEC)
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try:
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os.fsync(fd)
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finally:
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os.close(fd)
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def _write_atomic_json(path: Path, value: object, *, mode: int = 0o444) -> None:
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data = canonical_json(value)
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temporary = path.parent / f".{path.name}.{os.getpid()}.{uuid.uuid4().hex}.tmp"
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fd = os.open(temporary, os.O_CREAT | os.O_EXCL | os.O_WRONLY | os.O_CLOEXEC, 0o600)
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try:
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offset = 0
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while offset < len(data):
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count = os.write(fd, data[offset:])
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if count <= 0:
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raise OSError(errno.EIO, f"short write for {temporary}")
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offset += count
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os.fsync(fd)
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os.fchmod(fd, mode)
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os.fsync(fd)
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except BaseException:
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os.close(fd)
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temporary.unlink(missing_ok=True)
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raise
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else:
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os.close(fd)
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os.replace(temporary, path)
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_fsync_directory(path.parent)
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def _read_json_file(path: Path) -> dict[str, object]:
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fd = os.open(path, os.O_RDONLY | os.O_CLOEXEC | os.O_NOFOLLOW)
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try:
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return _read_json_fd(fd, path.name)
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finally:
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os.close(fd)
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def _read_json_at(directory_fd: int, name: str, *, require_read_only: bool = False) -> dict[str, object]:
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fd = os.open(name, os.O_RDONLY | os.O_CLOEXEC | os.O_NOFOLLOW, dir_fd=directory_fd)
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try:
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return _read_json_fd(fd, name, require_read_only=require_read_only)
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finally:
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os.close(fd)
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def _read_json_fd(fd: int, name: str, *, require_read_only: bool = False) -> dict[str, object]:
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file_stat = os.fstat(fd)
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if not stat.S_ISREG(file_stat.st_mode) or file_stat.st_nlink != 1:
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raise ManifestValidationError(f"metadata file {name!r} is not one regular file")
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if file_stat.st_size > _MAX_METADATA_BYTES:
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raise ManifestValidationError(f"metadata file {name!r} exceeds {_MAX_METADATA_BYTES} bytes")
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if require_read_only and (file_stat.st_uid != os.geteuid() or file_stat.st_mode & 0o222):
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raise ManifestValidationError(f"published metadata file {name!r} is not immutable")
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chunks: list[bytes] = []
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offset = 0
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while offset < file_stat.st_size:
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chunk = os.pread(fd, min(1024**2, file_stat.st_size - offset), offset)
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if not chunk:
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raise ManifestValidationError(f"metadata file {name!r} ended unexpectedly")
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chunks.append(chunk)
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offset += len(chunk)
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try:
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value = json.loads(b"".join(chunks))
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except (UnicodeDecodeError, json.JSONDecodeError) as exc:
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raise ManifestValidationError(f"metadata file {name!r} is not valid JSON") from exc
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if not isinstance(value, dict):
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raise ManifestValidationError(f"metadata file {name!r} must contain an object")
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return value
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def _sha256_fd(fd: int, size: int) -> str:
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digest = hashlib.sha256()
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offset = 0
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while offset < size:
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chunk = os.pread(fd, min(_FILE_HASH_CHUNK_BYTES, size - offset), offset)
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if not chunk:
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raise OSError(errno.EIO, "artifact file ended while hashing")
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digest.update(chunk)
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offset += len(chunk)
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return digest.hexdigest()
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def _mount_unescape(value: str) -> str:
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return value.replace("\\040", " ").replace("\\011", "\t").replace("\\012", "\n").replace("\\134", "\\")
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def detect_filesystem_type(path: Path) -> str:
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"""Return the kernel filesystem type for the most specific mount."""
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resolved = path.resolve()
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mountinfo = Path("/proc/self/mountinfo")
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if not mountinfo.is_file(): # pragma: no cover - vLLM-Omni production is Linux
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raise ValueError("cannot verify filesystem locality without /proc/self/mountinfo")
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best_length = -1
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best_type = ""
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for line in mountinfo.read_text(encoding="utf-8").splitlines():
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left, separator, right = line.partition(" - ")
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if not separator:
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continue
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left_fields = left.split()
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right_fields = right.split()
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if len(left_fields) < 5 or not right_fields:
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continue
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mount_point = Path(_mount_unescape(left_fields[4]))
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try:
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resolved.relative_to(mount_point)
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except ValueError:
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continue
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if len(str(mount_point)) > best_length:
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best_length = len(str(mount_point))
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best_type = right_fields[0]
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if not best_type:
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raise ValueError(f"cannot identify the filesystem containing {resolved}")
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return best_type
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def _storage_class_for_filesystem_type(filesystem_type: str) -> StorageClass:
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if filesystem_type in {"tmpfs", "ramfs"}:
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return StorageClass.TMPFS
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if filesystem_type in _LOCAL_DISK_FILESYSTEM_TYPES:
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return StorageClass.DISK
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if filesystem_type in _REMOTE_FILESYSTEM_TYPES:
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raise ValueError(f"filesystem type {filesystem_type!r} is not node-local")
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raise ValueError(f"filesystem type {filesystem_type!r} is not recognized as a local filesystem")
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def detect_storage_class(path: Path) -> StorageClass:
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"""Classify a verified node-local mount without spawning platform tools."""
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return _storage_class_for_filesystem_type(detect_filesystem_type(path))
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class FilesystemHostWeightStore:
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"""A cooperative local store with stable locks and immutable publication."""
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def __init__(
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self,
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domain: StorageDomainPolicy,
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capacity: CapacityPolicy,
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integrity: IntegrityPolicy,
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) -> None:
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self.domain_policy = domain
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self.capacity_policy = capacity
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self.integrity_policy = integrity
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self.root = domain.root.expanduser().resolve()
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self.locks_dir = self.root / "locks"
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self.artifacts_dir = self.root / "artifacts"
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self.tmp_dir = self.root / "tmp"
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self.quarantine_dir = self.root / "quarantine"
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self.deny_dir = self.root / "deny"
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if integrity.local_lookup is ValidationLevel.FS_VERITY:
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raise HostWeightError(
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_failure(
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ResolutionStage.CONFIGURATION,
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FailureCode.UNSUPPORTED,
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"filesystem-verity validation is not implemented",
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)
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)
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if domain.numa_prefault or domain.verify_numa_residency:
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raise HostWeightError(
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_failure(
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ResolutionStage.CONFIGURATION,
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FailureCode.UNSUPPORTED,
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"enforced NUMA placement and residency verification are not implemented",
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)
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)
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if integrity.background_scrub:
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raise HostWeightError(
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_failure(
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ResolutionStage.CONFIGURATION,
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FailureCode.UNSUPPORTED,
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"background integrity scrubbing is not implemented",
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)
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)
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try:
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self._initialize_domain()
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except HostWeightError:
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raise
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except OSError as exc:
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raise HostWeightError(
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_failure(
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ResolutionStage.DOMAIN,
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FailureCode.DOMAIN_UNAVAILABLE,
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f"cannot initialize storage domain {self.root}: {exc}",
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retryable=True,
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)
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) from exc
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except (ValueError, ManifestValidationError) as exc:
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raise HostWeightError(
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_failure(
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ResolutionStage.CONFIGURATION,
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FailureCode.DOMAIN_POLICY_MISMATCH,
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f"storage domain metadata is invalid under {self.root}: {exc}",
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)
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) from exc
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def _initialize_domain(self) -> None:
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try:
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self.filesystem_type = detect_filesystem_type(self.root)
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detected_storage_class = _storage_class_for_filesystem_type(self.filesystem_type)
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except ValueError as exc:
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raise HostWeightError(
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_failure(
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ResolutionStage.CONFIGURATION,
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FailureCode.DOMAIN_POLICY_MISMATCH,
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f"local filesystem storage is unavailable for {self.root}: {exc}",
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)
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) from exc
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if detected_storage_class is not self.domain_policy.storage_class:
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raise HostWeightError(
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_failure(
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ResolutionStage.DOMAIN,
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FailureCode.STORAGE_CLASS_MISMATCH,
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"configured storage class "
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f"{self.domain_policy.storage_class.value} differs from detected {detected_storage_class.value}",
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)
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)
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try:
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self.root.mkdir(parents=True, exist_ok=True, mode=0o700)
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self.locks_dir.mkdir(exist_ok=True, mode=0o700)
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for directory in (self.artifacts_dir, self.tmp_dir, self.quarantine_dir, self.deny_dir):
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directory.mkdir(exist_ok=True, mode=0o700)
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except OSError as exc:
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raise HostWeightError(
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_failure(
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ResolutionStage.DOMAIN,
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FailureCode.DOMAIN_UNAVAILABLE,
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f"cannot initialize {self.root}: {exc}",
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retryable=True,
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)
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) from exc
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if self.integrity_policy.require_trusted_permissions:
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for directory in (
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self.root,
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self.locks_dir,
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self.artifacts_dir,
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self.tmp_dir,
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self.quarantine_dir,
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self.deny_dir,
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):
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directory_stat = directory.lstat()
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if (
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not stat.S_ISDIR(directory_stat.st_mode)
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or directory_stat.st_uid != os.geteuid()
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or directory_stat.st_mode & 0o022
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):
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raise HostWeightError(
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_failure(
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ResolutionStage.DOMAIN,
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FailureCode.DOMAIN_UNAVAILABLE,
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f"host weight store directory is not exclusively controlled by this user: {directory}",
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)
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)
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with FileLock(self.locks_dir / "domain-init.lock", exclusive=True, deadline=None):
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domain_path = self.root / _DOMAIN_FILE
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if domain_path.exists():
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domain_metadata = _read_json_file(domain_path)
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expected = {
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"schema_version": 1,
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"scope": self.domain_policy.scope.value,
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"domain_id": self.domain_policy.domain_id,
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"backend": "local_filesystem",
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"storage_class": self.domain_policy.storage_class.value,
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"filesystem_type": self.filesystem_type,
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}
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if set(domain_metadata) != {*expected, "domain_uuid"}:
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raise HostWeightError(
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_failure(
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ResolutionStage.CONFIGURATION,
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FailureCode.DOMAIN_POLICY_MISMATCH,
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f"storage domain metadata has an incompatible schema under {self.root}",
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)
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)
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actual = {key: domain_metadata.get(key) for key in expected}
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domain_uuid = domain_metadata.get("domain_uuid")
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if actual != expected or not isinstance(domain_uuid, str) or not domain_uuid:
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raise HostWeightError(
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_failure(
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ResolutionStage.CONFIGURATION,
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FailureCode.DOMAIN_POLICY_MISMATCH,
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f"storage domain metadata does not match configured policy under {self.root}",
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)
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)
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else:
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domain_metadata = {
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"schema_version": 1,
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"domain_uuid": uuid.uuid4().hex,
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"scope": self.domain_policy.scope.value,
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"domain_id": self.domain_policy.domain_id,
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"backend": "local_filesystem",
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"storage_class": self.domain_policy.storage_class.value,
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"filesystem_type": self.filesystem_type,
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}
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_write_atomic_json(domain_path, domain_metadata)
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self.domain_uuid = str(domain_metadata["domain_uuid"])
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policy_path = self.root / _DOMAIN_POLICY_FILE
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requested_policy = self._capacity_document(policy_version=1)
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if policy_path.exists():
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actual_policy = _read_json_file(policy_path)
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if set(actual_policy) != set(requested_policy):
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raise HostWeightError(
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_failure(
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ResolutionStage.CONFIGURATION,
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FailureCode.DOMAIN_POLICY_MISMATCH,
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f"capacity policy has an incompatible schema under {self.root}",
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)
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)
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comparable_actual = {key: actual_policy.get(key) for key in requested_policy if key != "policy_version"}
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comparable_requested = {
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key: value for key, value in requested_policy.items() if key != "policy_version"
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}
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if comparable_actual != comparable_requested:
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raise HostWeightError(
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|
_failure(
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ResolutionStage.CONFIGURATION,
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|
FailureCode.DOMAIN_POLICY_MISMATCH,
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f"capacity policy differs from the authoritative policy under {self.root}",
|
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)
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)
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policy_version = actual_policy.get("policy_version")
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if isinstance(policy_version, bool) or not isinstance(policy_version, int) or policy_version < 1:
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raise HostWeightError(
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|
_failure(
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ResolutionStage.CONFIGURATION,
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|
FailureCode.DOMAIN_POLICY_MISMATCH,
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f"capacity policy has an invalid version under {self.root}",
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)
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)
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self.policy_version = policy_version
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else:
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_write_atomic_json(policy_path, requested_policy)
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self.policy_version = 1
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|
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def _capacity_document(self, *, policy_version: int) -> dict[str, object]:
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return {
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"schema_version": 1,
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"policy_version": policy_version,
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"max_artifact_bytes": self.capacity_policy.max_artifact_bytes,
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|
"max_store_bytes": self.capacity_policy.max_store_bytes,
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"min_free_bytes": self.capacity_policy.min_free_bytes,
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"eviction": self.capacity_policy.eviction,
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}
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|
|
def _build_lock_path(self, key: str) -> Path:
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|
return self.locks_dir / f"{key}.build.lock"
|
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|
|
def _artifact_lock_path(self, key: str) -> Path:
|
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return self.locks_dir / f"{key}.artifact.lock"
|
|
|
|
def _entry_path(self, key: str) -> Path:
|
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return self.artifacts_dir / key
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|
|
def _deny_path(self, key: str) -> Path:
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return self.deny_dir / f"{key}.json"
|
|
|
|
def lookup(
|
|
self,
|
|
identity: WeightArtifactIdentity,
|
|
*,
|
|
validation: ValidationLevel,
|
|
deadline: float | None = None,
|
|
) -> StoreResult:
|
|
return self._lookup(identity, validation=validation, deadline=deadline, record_invalid=True)
|
|
|
|
def _lookup(
|
|
self,
|
|
identity: WeightArtifactIdentity,
|
|
*,
|
|
validation: ValidationLevel,
|
|
deadline: float | None,
|
|
record_invalid: bool,
|
|
) -> StoreResult:
|
|
if validation is ValidationLevel.FS_VERITY:
|
|
return StoreResult(
|
|
StoreStatus.FAILED,
|
|
failure=_failure(
|
|
ResolutionStage.VALIDATION,
|
|
FailureCode.UNSUPPORTED,
|
|
"filesystem-verity validation is modeled but not implemented",
|
|
),
|
|
)
|
|
try:
|
|
artifact_lock = FileLock(self._artifact_lock_path(identity.key), exclusive=False, deadline=deadline)
|
|
except FileLockTimeoutError as exc:
|
|
return StoreResult(
|
|
StoreStatus.TIMEOUT,
|
|
failure=_failure(
|
|
ResolutionStage.LOOKUP,
|
|
FailureCode.ACTIVE_BUILD_TIMEOUT,
|
|
str(exc),
|
|
retryable=True,
|
|
),
|
|
)
|
|
except OSError as exc:
|
|
return StoreResult(
|
|
StoreStatus.FAILED,
|
|
failure=_failure(ResolutionStage.DOMAIN, FailureCode.DOMAIN_UNAVAILABLE, str(exc), retryable=True),
|
|
)
|
|
|
|
entry_path = self._entry_path(identity.key)
|
|
if not entry_path.exists():
|
|
artifact_lock.close()
|
|
return StoreResult(StoreStatus.MISS)
|
|
if self._deny_path(identity.key).exists():
|
|
artifact_lock.close()
|
|
return StoreResult(
|
|
StoreStatus.INVALID,
|
|
failure=_failure(
|
|
ResolutionStage.LOOKUP,
|
|
FailureCode.ARTIFACT_DENIED,
|
|
f"artifact {identity.key} is denied pending quarantine",
|
|
),
|
|
)
|
|
try:
|
|
lease = self._open_lease(identity, entry_path, artifact_lock, validation)
|
|
if self._deny_path(identity.key).exists():
|
|
lease.close()
|
|
return StoreResult(
|
|
StoreStatus.INVALID,
|
|
failure=_failure(
|
|
ResolutionStage.LOOKUP,
|
|
FailureCode.ARTIFACT_DENIED,
|
|
f"artifact {identity.key} was denied during lookup",
|
|
),
|
|
)
|
|
return StoreResult(StoreStatus.HIT, lease=lease)
|
|
except HostWeightError as exc:
|
|
try:
|
|
if record_invalid:
|
|
with contextlib.suppress(OSError):
|
|
self._write_deny(identity.key, exc.failure)
|
|
finally:
|
|
artifact_lock.close()
|
|
return StoreResult(StoreStatus.INVALID, failure=exc.failure)
|
|
except (OSError, SafetensorError, ValueError, ManifestValidationError) as exc:
|
|
failure = _failure(
|
|
ResolutionStage.VALIDATION,
|
|
FailureCode.MANIFEST_CORRUPT,
|
|
f"artifact {identity.key} failed validation: {exc}",
|
|
)
|
|
try:
|
|
if record_invalid:
|
|
with contextlib.suppress(OSError):
|
|
self._write_deny(identity.key, failure)
|
|
finally:
|
|
artifact_lock.close()
|
|
return StoreResult(StoreStatus.INVALID, failure=failure)
|
|
|
|
def _open_lease(
|
|
self,
|
|
identity: WeightArtifactIdentity,
|
|
entry_path: Path,
|
|
artifact_lock: FileLock,
|
|
validation: ValidationLevel,
|
|
) -> HostWeightLease:
|
|
resources: list[Callable[[], None]] = []
|
|
try:
|
|
entry_fd = os.open(entry_path, os.O_RDONLY | os.O_DIRECTORY | os.O_CLOEXEC | os.O_NOFOLLOW)
|
|
resources.append(_make_fd_closer(entry_fd))
|
|
entry_stat = os.fstat(entry_fd)
|
|
if self.integrity_policy.require_trusted_permissions and (
|
|
entry_stat.st_uid != os.geteuid() or entry_stat.st_mode & 0o222
|
|
):
|
|
raise ManifestValidationError("published artifact directory is not immutable")
|
|
names = set(os.listdir(entry_fd))
|
|
marker_document = _read_json_at(
|
|
entry_fd,
|
|
_READY_FILE,
|
|
require_read_only=self.integrity_policy.require_trusted_permissions,
|
|
)
|
|
manifest_document = _read_json_at(
|
|
entry_fd,
|
|
_MANIFEST_FILE,
|
|
require_read_only=self.integrity_policy.require_trusted_permissions,
|
|
)
|
|
marker = PublicationMarker.from_dict(marker_document)
|
|
manifest = WeightManifest.from_dict(manifest_document)
|
|
if marker.schema_version != 1 or manifest.schema_version != 1 or marker.integrity_mode != "full_checksum":
|
|
raise HostWeightError(
|
|
_failure(
|
|
ResolutionStage.VALIDATION,
|
|
FailureCode.MANIFEST_INCOMPATIBLE,
|
|
"artifact publication schema or integrity mode is unsupported",
|
|
)
|
|
)
|
|
expected_names = {_READY_FILE, _MANIFEST_FILE, *(entry.file_name for entry in manifest.files)}
|
|
if names != expected_names:
|
|
raise ManifestValidationError(
|
|
f"artifact directory entries differ: missing={sorted(expected_names - names)}, "
|
|
f"unexpected={sorted(names - expected_names)}"
|
|
)
|
|
manifest_digest = hashlib.sha256(manifest.canonical_bytes).hexdigest()
|
|
if marker.manifest_sha256 != manifest_digest:
|
|
raise HostWeightError(
|
|
_failure(ResolutionStage.VALIDATION, FailureCode.CHECKSUM_MISMATCH, "manifest digest mismatch")
|
|
)
|
|
if marker.artifact_content_sha256 != manifest.artifact_content_sha256:
|
|
raise HostWeightError(
|
|
_failure(ResolutionStage.VALIDATION, FailureCode.CHECKSUM_MISMATCH, "content digest mismatch")
|
|
)
|
|
if manifest.artifact_key != identity.key or manifest.identity.canonical_bytes != identity.canonical_bytes:
|
|
raise HostWeightError(
|
|
_failure(
|
|
ResolutionStage.VALIDATION,
|
|
FailureCode.MANIFEST_INCOMPATIBLE,
|
|
"artifact semantic identity differs from the exact request",
|
|
)
|
|
)
|
|
if (
|
|
manifest.producer_schema != identity.producer.manifest_schema
|
|
or manifest.restorer_schema != identity.producer.restorer_schema
|
|
):
|
|
raise HostWeightError(
|
|
_failure(
|
|
ResolutionStage.VALIDATION,
|
|
FailureCode.MANIFEST_INCOMPATIBLE,
|
|
"artifact producer or restorer schema differs from the exact request",
|
|
)
|
|
)
|
|
|
|
tensors_by_file: dict[str, list[TensorManifestEntry]] = defaultdict(list)
|
|
for tensor_entry in manifest.tensors:
|
|
tensors_by_file[tensor_entry.file_name].append(tensor_entry)
|
|
tensors: dict[str, torch.Tensor] = {}
|
|
regions: list[MappedHostRegion] = []
|
|
backing_digest = hashlib.sha256()
|
|
for file_entry in manifest.files:
|
|
fd = os.open(
|
|
file_entry.file_name,
|
|
os.O_RDONLY | os.O_CLOEXEC | os.O_NOFOLLOW,
|
|
dir_fd=entry_fd,
|
|
)
|
|
resources.append(_make_fd_closer(fd))
|
|
file_stat = os.fstat(fd)
|
|
if not stat.S_ISREG(file_stat.st_mode) or file_stat.st_nlink != 1:
|
|
raise ManifestValidationError(f"payload {file_entry.file_name!r} is not one regular file")
|
|
if file_stat.st_size != file_entry.size:
|
|
raise HostWeightError(
|
|
_failure(
|
|
ResolutionStage.VALIDATION,
|
|
FailureCode.CHECKSUM_MISMATCH,
|
|
f"payload size differs for {file_entry.file_name!r}",
|
|
)
|
|
)
|
|
if self.integrity_policy.require_trusted_permissions and (
|
|
file_stat.st_uid != os.geteuid() or file_stat.st_mode & 0o222
|
|
):
|
|
raise ManifestValidationError(f"published payload {file_entry.file_name!r} is not immutable")
|
|
if (
|
|
validation is ValidationLevel.FULL_CHECKSUM
|
|
and _sha256_fd(fd, file_stat.st_size) != file_entry.sha256
|
|
):
|
|
raise HostWeightError(
|
|
_failure(
|
|
ResolutionStage.VALIDATION,
|
|
FailureCode.CHECKSUM_MISMATCH,
|
|
f"payload digest differs for {file_entry.file_name!r}",
|
|
)
|
|
)
|
|
backing_digest.update(
|
|
canonical_json(
|
|
{
|
|
"file": file_entry.file_name,
|
|
"device": file_stat.st_dev,
|
|
"inode": file_stat.st_ino,
|
|
"size": file_stat.st_size,
|
|
}
|
|
)
|
|
)
|
|
handle_context = safe_open(f"/proc/self/fd/{fd}", framework="pt", device="cpu")
|
|
handle = handle_context.__enter__()
|
|
resources.append(_make_context_closer(handle_context))
|
|
expected_entries = tensors_by_file[file_entry.file_name]
|
|
if set(handle.keys()) != {entry.storage_key for entry in expected_entries}:
|
|
raise ManifestValidationError(f"payload tensor keys differ for {file_entry.file_name!r}")
|
|
addresses: list[tuple[int, int]] = []
|
|
for tensor_entry in expected_entries:
|
|
tensor = handle.get_tensor(tensor_entry.storage_key)
|
|
actual_nbytes = tensor.numel() * tensor.element_size()
|
|
if (
|
|
tuple(tensor.shape) != tensor_entry.shape
|
|
or str(tensor.dtype) != tensor_entry.dtype
|
|
or tuple(tensor.stride()) != tensor_entry.stride
|
|
or actual_nbytes != tensor_entry.nbytes
|
|
or tensor.device.type != "cpu"
|
|
):
|
|
raise ManifestValidationError(f"mapped tensor metadata differs for {tensor_entry.name!r}")
|
|
tensors[tensor_entry.name] = tensor
|
|
if actual_nbytes:
|
|
addresses.append((tensor.data_ptr(), tensor.data_ptr() + actual_nbytes))
|
|
if addresses:
|
|
merged: list[list[int]] = []
|
|
for start, end in sorted(addresses):
|
|
if merged and start <= merged[-1][1]:
|
|
merged[-1][1] = max(merged[-1][1], end)
|
|
else:
|
|
merged.append([start, end])
|
|
regions.extend(
|
|
MappedHostRegion(
|
|
file_name=file_entry.file_name,
|
|
address=start,
|
|
length=end - start,
|
|
)
|
|
for start, end in merged
|
|
)
|
|
|
|
backing_digest.update(self.domain_uuid.encode("ascii"))
|
|
backing_digest.update(marker.publication_id.encode("ascii"))
|
|
provenance = LeaseProvenance(
|
|
resolution_id=uuid.uuid4().hex,
|
|
identity_digest=identity.key,
|
|
artifact_content_sha256=manifest.artifact_content_sha256,
|
|
domain_uuid=self.domain_uuid,
|
|
publication_id=marker.publication_id,
|
|
resolution_source="local",
|
|
artifact_origin="producer",
|
|
producer_id=identity.producer.producer_id,
|
|
provider_id=None,
|
|
validation_level=validation.value,
|
|
backing_fingerprint=backing_digest.hexdigest(),
|
|
)
|
|
return HostWeightLease(
|
|
identity=identity,
|
|
manifest=manifest,
|
|
tensors=tensors,
|
|
mapped_regions=tuple(regions),
|
|
provenance=provenance,
|
|
resource_closers=tuple(resources),
|
|
release_artifact_lock=artifact_lock.close,
|
|
)
|
|
except BaseException:
|
|
for closer in reversed(resources):
|
|
with contextlib.suppress(Exception):
|
|
closer()
|
|
raise
|
|
|
|
def get_or_build(
|
|
self,
|
|
request: BuildRequest,
|
|
producer: WeightProducer,
|
|
*,
|
|
validation: ValidationLevel,
|
|
deadline: float,
|
|
) -> StoreResult:
|
|
identity = request.identity
|
|
if producer.spec.coordination_scope is not CoordinationScope.SINGLE_PROCESS:
|
|
return StoreResult(
|
|
StoreStatus.FAILED,
|
|
failure=_failure(
|
|
ResolutionStage.PRODUCTION,
|
|
FailureCode.PRODUCER_UNSUPPORTED,
|
|
f"coordination scope {producer.spec.coordination_scope.value} is not implemented",
|
|
),
|
|
)
|
|
if tuple(output.key for output in producer.spec.outputs) != (identity.key,):
|
|
return StoreResult(
|
|
StoreStatus.FAILED,
|
|
failure=_failure(
|
|
ResolutionStage.PRODUCTION,
|
|
FailureCode.PRODUCER_UNAVAILABLE,
|
|
"producer does not declare exactly the requested artifact identity",
|
|
),
|
|
)
|
|
|
|
initial = self.lookup(identity, validation=validation, deadline=deadline)
|
|
if initial.status is StoreStatus.HIT:
|
|
return initial
|
|
if initial.status in {StoreStatus.TIMEOUT, StoreStatus.FAILED}:
|
|
return initial
|
|
|
|
try:
|
|
build_lock = FileLock(self._build_lock_path(identity.key), exclusive=True, deadline=deadline)
|
|
except FileLockTimeoutError as exc:
|
|
return StoreResult(
|
|
StoreStatus.TIMEOUT,
|
|
failure=_failure(
|
|
ResolutionStage.PRODUCTION,
|
|
FailureCode.ACTIVE_BUILD_TIMEOUT,
|
|
str(exc),
|
|
retryable=True,
|
|
),
|
|
)
|
|
except OSError as exc:
|
|
return StoreResult(
|
|
StoreStatus.FAILED,
|
|
failure=_failure(ResolutionStage.DOMAIN, FailureCode.DOMAIN_UNAVAILABLE, str(exc), retryable=True),
|
|
)
|
|
|
|
with build_lock:
|
|
recheck = self.lookup(identity, validation=validation, deadline=deadline)
|
|
if recheck.status is StoreStatus.HIT:
|
|
return StoreResult(StoreStatus.JOINED, lease=recheck.lease)
|
|
if recheck.status in {StoreStatus.TIMEOUT, StoreStatus.FAILED}:
|
|
return recheck
|
|
|
|
try:
|
|
with FileLock(self._artifact_lock_path(identity.key), exclusive=True, deadline=deadline):
|
|
if self._entry_path(identity.key).exists():
|
|
self._quarantine_locked(identity.key, reason="validation_failure")
|
|
self._remove_deny_locked(identity.key)
|
|
self._remove_stale_temps_locked(identity.key)
|
|
except FileLockTimeoutError as exc:
|
|
return StoreResult(
|
|
StoreStatus.TIMEOUT,
|
|
failure=_failure(
|
|
ResolutionStage.PRODUCTION,
|
|
FailureCode.ACTIVE_BUILD_TIMEOUT,
|
|
str(exc),
|
|
retryable=True,
|
|
),
|
|
)
|
|
except OSError as exc:
|
|
return StoreResult(
|
|
StoreStatus.FAILED,
|
|
failure=_failure(
|
|
ResolutionStage.LIFECYCLE,
|
|
FailureCode.QUARANTINE_FAILED,
|
|
f"failed to prepare artifact rebuild: {exc}",
|
|
),
|
|
)
|
|
|
|
staging = self.tmp_dir / f"{identity.key}.{os.getpid()}.{uuid.uuid4().hex}"
|
|
writer: FilesystemArtifactWriter | None = None
|
|
manifest: WeightManifest | None = None
|
|
try:
|
|
staging.mkdir(mode=0o700)
|
|
writer = FilesystemArtifactWriter(staging, capacity_check=self._check_capacity)
|
|
metadata = producer.produce(writer)
|
|
manifest, _ = writer.finalize(identity, metadata)
|
|
artifact_bytes = self._tree_bytes(staging)
|
|
self._check_capacity(artifact_bytes, 0)
|
|
os.chmod(staging, 0o555)
|
|
_fsync_directory(staging)
|
|
except HostWeightError as exc:
|
|
if writer is not None:
|
|
writer.abort()
|
|
self._discard_temp(identity.key, staging)
|
|
return StoreResult(StoreStatus.FAILED, failure=exc.failure)
|
|
except OSError as exc:
|
|
if writer is not None:
|
|
writer.abort()
|
|
self._discard_temp(identity.key, staging)
|
|
if exc.errno in (errno.ENOSPC, errno.EDQUOT):
|
|
code = FailureCode.ENOSPC
|
|
stage = ResolutionStage.CAPACITY
|
|
elif writer is None:
|
|
code = FailureCode.DOMAIN_UNAVAILABLE
|
|
stage = ResolutionStage.DOMAIN
|
|
else:
|
|
code = FailureCode.PRODUCER_FAILED
|
|
stage = ResolutionStage.PRODUCTION
|
|
return StoreResult(
|
|
StoreStatus.FAILED,
|
|
failure=_failure(
|
|
stage,
|
|
code,
|
|
f"artifact production failed: {exc}",
|
|
retryable=stage is ResolutionStage.CAPACITY,
|
|
),
|
|
)
|
|
except Exception as exc:
|
|
if writer is not None:
|
|
writer.abort()
|
|
self._discard_temp(identity.key, staging)
|
|
return StoreResult(
|
|
StoreStatus.FAILED,
|
|
failure=_failure(
|
|
ResolutionStage.PRODUCTION,
|
|
FailureCode.PRODUCER_FAILED,
|
|
f"artifact producer failed: {exc}",
|
|
),
|
|
)
|
|
|
|
assert manifest is not None
|
|
try:
|
|
with FileLock(self._artifact_lock_path(identity.key), exclusive=True, deadline=None):
|
|
entry_path = self._entry_path(identity.key)
|
|
if entry_path.exists():
|
|
existing = WeightManifest.from_dict(_read_json_file(entry_path / _MANIFEST_FILE))
|
|
same_semantic_content = (
|
|
existing.identity.canonical_bytes == manifest.identity.canonical_bytes
|
|
and existing.artifact_content_sha256 == manifest.artifact_content_sha256
|
|
and existing.producer_schema == manifest.producer_schema
|
|
and existing.restorer_schema == manifest.restorer_schema
|
|
and existing.format_metadata == manifest.format_metadata
|
|
)
|
|
if not same_semantic_content:
|
|
collision = self.quarantine_dir / f"{identity.key}.identity-collision.{uuid.uuid4().hex}"
|
|
os.replace(staging, collision)
|
|
_fsync_directory(self.quarantine_dir)
|
|
_fsync_directory(self.tmp_dir)
|
|
return StoreResult(
|
|
StoreStatus.FAILED,
|
|
failure=_failure(
|
|
ResolutionStage.VALIDATION,
|
|
FailureCode.IDENTITY_COLLISION,
|
|
"the same semantic identity produced different artifact content",
|
|
),
|
|
)
|
|
self._remove_tree(staging)
|
|
else:
|
|
os.replace(staging, entry_path)
|
|
_fsync_directory(self.artifacts_dir)
|
|
_fsync_directory(self.tmp_dir)
|
|
self._remove_deny_locked(identity.key)
|
|
except (OSError, ValueError, ManifestValidationError) as exc:
|
|
self._discard_temp(identity.key, staging)
|
|
return StoreResult(
|
|
StoreStatus.FAILED,
|
|
failure=_failure(
|
|
ResolutionStage.LIFECYCLE,
|
|
FailureCode.PUBLICATION_FAILED,
|
|
f"atomic artifact publication failed: {exc}",
|
|
),
|
|
)
|
|
|
|
opened = self.lookup(identity, validation=validation, deadline=deadline)
|
|
if opened.status is not StoreStatus.HIT:
|
|
return opened
|
|
return StoreResult(StoreStatus.BUILT, lease=opened.lease)
|
|
|
|
def _check_capacity(self, projected_artifact_bytes: int, additional_bytes: int) -> None:
|
|
policy = self.capacity_policy
|
|
if policy.max_artifact_bytes is not None and projected_artifact_bytes > policy.max_artifact_bytes:
|
|
raise HostWeightError(
|
|
_failure(
|
|
ResolutionStage.CAPACITY,
|
|
FailureCode.ARTIFACT_TOO_LARGE,
|
|
f"projected artifact size {projected_artifact_bytes} exceeds {policy.max_artifact_bytes}",
|
|
retryable=True,
|
|
)
|
|
)
|
|
store_bytes = self._tree_bytes(self.root)
|
|
if policy.max_store_bytes is not None and store_bytes + additional_bytes > policy.max_store_bytes:
|
|
raise HostWeightError(
|
|
_failure(
|
|
ResolutionStage.CAPACITY,
|
|
FailureCode.STORE_LIMIT_EXCEEDED,
|
|
f"store size plus allocation would exceed {policy.max_store_bytes}",
|
|
retryable=True,
|
|
)
|
|
)
|
|
free_bytes = shutil.disk_usage(self.root).free
|
|
if free_bytes - additional_bytes < policy.min_free_bytes:
|
|
raise HostWeightError(
|
|
_failure(
|
|
ResolutionStage.CAPACITY,
|
|
FailureCode.INSUFFICIENT_CAPACITY,
|
|
f"allocation would leave less than {policy.min_free_bytes} free bytes",
|
|
retryable=True,
|
|
)
|
|
)
|
|
|
|
def _write_deny(self, key: str, failure: HostWeightFailure) -> None:
|
|
path = self._deny_path(key)
|
|
document = {
|
|
"schema_version": 1,
|
|
"stage": failure.stage.value,
|
|
"reason": failure.code.value,
|
|
"message": failure.message,
|
|
}
|
|
try:
|
|
fd = os.open(path, os.O_CREAT | os.O_EXCL | os.O_WRONLY | os.O_CLOEXEC, 0o444)
|
|
except FileExistsError:
|
|
return
|
|
try:
|
|
data = canonical_json(document)
|
|
offset = 0
|
|
while offset < len(data):
|
|
written = os.write(fd, data[offset:])
|
|
if written == 0:
|
|
raise OSError("short write while publishing deny marker")
|
|
offset += written
|
|
os.fsync(fd)
|
|
finally:
|
|
os.close(fd)
|
|
_fsync_directory(self.deny_dir)
|
|
|
|
def _remove_deny_locked(self, key: str) -> None:
|
|
path = self._deny_path(key)
|
|
if path.exists():
|
|
path.unlink()
|
|
_fsync_directory(self.deny_dir)
|
|
|
|
def _quarantine_locked(self, key: str, *, reason: str) -> Path | None:
|
|
entry = self._entry_path(key)
|
|
if not entry.exists():
|
|
return None
|
|
destination = self.quarantine_dir / f"{key}.{reason}.{uuid.uuid4().hex}"
|
|
os.replace(entry, destination)
|
|
_fsync_directory(self.artifacts_dir)
|
|
_fsync_directory(self.quarantine_dir)
|
|
return destination
|
|
|
|
def _remove_stale_temps_locked(self, key: str) -> None:
|
|
for path in self.tmp_dir.glob(f"{key}.*"):
|
|
self._remove_tree(path)
|
|
_fsync_directory(self.tmp_dir)
|
|
|
|
def _discard_temp(self, key: str, path: Path) -> None:
|
|
with contextlib.suppress(OSError, FileLockTimeoutError):
|
|
with FileLock(self._artifact_lock_path(key), exclusive=True, deadline=None):
|
|
self._remove_tree(path)
|
|
_fsync_directory(self.tmp_dir)
|
|
|
|
@staticmethod
|
|
def _remove_tree(path: Path) -> None:
|
|
if path.is_symlink() or path.is_file():
|
|
path.unlink(missing_ok=True)
|
|
elif path.exists():
|
|
for directory, subdirectories, _ in os.walk(path, topdown=False, followlinks=False):
|
|
for name in subdirectories:
|
|
child = Path(directory) / name
|
|
if not child.is_symlink():
|
|
os.chmod(child, 0o700)
|
|
os.chmod(directory, 0o700)
|
|
shutil.rmtree(path)
|
|
|
|
@staticmethod
|
|
def _tree_bytes(root: Path) -> int:
|
|
with contextlib.suppress(OSError):
|
|
root_stat = root.lstat()
|
|
if stat.S_ISREG(root_stat.st_mode):
|
|
return root_stat.st_size
|
|
total = 0
|
|
for directory, _, files in os.walk(root, followlinks=False):
|
|
for name in files:
|
|
path = Path(directory) / name
|
|
with contextlib.suppress(OSError):
|
|
file_stat = path.lstat()
|
|
if stat.S_ISREG(file_stat.st_mode):
|
|
total += file_stat.st_size
|
|
return total
|
|
|
|
def cleanup(self, identity: WeightArtifactIdentity) -> HostWeightFailure | None:
|
|
"""Explicitly remove an inactive artifact without waiting for leases."""
|
|
try:
|
|
build_lock = FileLock(
|
|
self._build_lock_path(identity.key),
|
|
exclusive=True,
|
|
deadline=None,
|
|
nonblocking=True,
|
|
)
|
|
except FileLockTimeoutError:
|
|
return _failure(
|
|
ResolutionStage.LIFECYCLE,
|
|
FailureCode.ACTIVE_BUILD_TIMEOUT,
|
|
f"artifact {identity.key} has an active builder",
|
|
retryable=True,
|
|
)
|
|
with build_lock:
|
|
try:
|
|
artifact_lock = FileLock(
|
|
self._artifact_lock_path(identity.key),
|
|
exclusive=True,
|
|
deadline=None,
|
|
nonblocking=True,
|
|
)
|
|
except FileLockTimeoutError:
|
|
return _failure(
|
|
ResolutionStage.LIFECYCLE,
|
|
FailureCode.ACTIVE_LEASE,
|
|
f"artifact {identity.key} has an active lease",
|
|
retryable=True,
|
|
)
|
|
with artifact_lock:
|
|
entry = self._entry_path(identity.key)
|
|
if entry.exists():
|
|
removal = self.quarantine_dir / f"{identity.key}.cleanup.{uuid.uuid4().hex}"
|
|
os.replace(entry, removal)
|
|
_fsync_directory(self.artifacts_dir)
|
|
self._remove_tree(removal)
|
|
_fsync_directory(self.quarantine_dir)
|
|
self._remove_deny_locked(identity.key)
|
|
return None
|
|
|
|
def inspect_domain(self) -> DomainInspection:
|
|
usage = shutil.disk_usage(self.root)
|
|
inventory: list[ArtifactInventoryEntry] = []
|
|
for state, directory in (
|
|
(ArtifactInventoryState.READY, self.artifacts_dir),
|
|
(ArtifactInventoryState.DENIED, self.deny_dir),
|
|
(ArtifactInventoryState.QUARANTINED, self.quarantine_dir),
|
|
(ArtifactInventoryState.TEMPORARY, self.tmp_dir),
|
|
):
|
|
for path in directory.iterdir():
|
|
artifact_key = path.name[:64]
|
|
if _ARTIFACT_KEY_RE.fullmatch(artifact_key) is None:
|
|
continue
|
|
reason = None
|
|
if state is ArtifactInventoryState.DENIED:
|
|
with contextlib.suppress(OSError, ValueError, ManifestValidationError):
|
|
reason_value = _read_json_file(path).get("reason")
|
|
if isinstance(reason_value, str):
|
|
reason = reason_value
|
|
inventory.append(
|
|
ArtifactInventoryEntry(
|
|
artifact_key=artifact_key,
|
|
state=state,
|
|
storage_name=path.name,
|
|
size_bytes=self._tree_bytes(path),
|
|
reason=reason,
|
|
)
|
|
)
|
|
inventory.sort(key=lambda item: (item.artifact_key, item.state.value, item.storage_name))
|
|
return DomainInspection(
|
|
domain_uuid=self.domain_uuid,
|
|
scope=self.domain_policy.scope.value,
|
|
domain_id=self.domain_policy.domain_id,
|
|
storage_class=self.domain_policy.storage_class.value,
|
|
filesystem_type=self.filesystem_type,
|
|
policy_version=self.policy_version,
|
|
store_bytes=self._tree_bytes(self.root),
|
|
filesystem_free_bytes=usage.free,
|
|
max_artifact_bytes=self.capacity_policy.max_artifact_bytes,
|
|
max_store_bytes=self.capacity_policy.max_store_bytes,
|
|
min_free_bytes=self.capacity_policy.min_free_bytes,
|
|
inventory=tuple(inventory),
|
|
)
|
|
|
|
def inspect_artifact(
|
|
self,
|
|
identity: WeightArtifactIdentity,
|
|
*,
|
|
validation: ValidationLevel,
|
|
) -> ArtifactInspection:
|
|
result = self._lookup(
|
|
identity,
|
|
validation=validation,
|
|
deadline=time.monotonic(),
|
|
record_invalid=False,
|
|
)
|
|
manifest = None
|
|
publication_id = None
|
|
backing_fingerprint = None
|
|
if result.lease is not None:
|
|
manifest = result.lease.manifest
|
|
publication_id = result.lease.provenance.publication_id
|
|
backing_fingerprint = result.lease.provenance.backing_fingerprint
|
|
result.lease.close()
|
|
entry = self._entry_path(identity.key)
|
|
return ArtifactInspection(
|
|
artifact_key=identity.key,
|
|
status=result.status,
|
|
size_bytes=self._tree_bytes(entry),
|
|
manifest=manifest,
|
|
publication_id=publication_id,
|
|
backing_fingerprint=backing_fingerprint,
|
|
failure=result.failure,
|
|
build_lock_active=lock_is_active(self._build_lock_path(identity.key)),
|
|
artifact_lock_active=lock_is_active(self._artifact_lock_path(identity.key)),
|
|
)
|
|
|
|
|
|
__all__ = ["FilesystemHostWeightStore", "detect_storage_class"]
|