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106 lines
3.4 KiB
Python
106 lines
3.4 KiB
Python
"""Sandbox backend registry — selected via STRIX_RUNTIME_BACKEND (default: docker)."""
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from __future__ import annotations
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import logging
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from collections.abc import Awaitable, Callable
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from typing import TYPE_CHECKING, Any
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if TYPE_CHECKING:
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from agents.sandbox.manifest import Manifest
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logger = logging.getLogger(__name__)
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SandboxBackend = Callable[..., Awaitable[tuple[Any, Any]]]
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async def _docker_backend(
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*,
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image: str,
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manifest: Manifest,
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exposed_ports: tuple[int, ...],
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bind_mounts: list[dict[str, Any]] | None = None,
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) -> tuple[Any, Any]:
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"""Bring up a session backed by the local Docker daemon.
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Uses :class:`StrixDockerSandboxClient` to inject NET_ADMIN /
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NET_RAW caps + ``host.docker.internal`` host-gateway. Imports
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``docker`` lazily so deployments that target a non-Docker
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backend don't need the docker-py library installed.
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``session.start()`` is what materializes the manifest into the running
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container — the SDK's ``client.create()`` only builds the inner session
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object without applying it. ``async with session:`` would call it too, but
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Strix manages session lifetime explicitly via ``client.delete()`` so we
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trigger ``start()`` ourselves.
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"""
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import docker
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from agents.sandbox.sandboxes.docker import DockerSandboxClientOptions
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from strix.runtime.docker_client import StrixDockerSandboxClient
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client = StrixDockerSandboxClient(docker.from_env())
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client.strix_bind_mounts = bind_mounts or []
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options = DockerSandboxClientOptions(image=image, exposed_ports=exposed_ports)
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session = await client.create(options=options, manifest=manifest)
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await session.start()
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return client, session
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_BACKENDS: dict[str, SandboxBackend] = {
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"docker": _docker_backend,
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}
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_BIND_MOUNT_BACKENDS: set[str] = {"docker"}
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def get_backend(name: str) -> SandboxBackend:
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"""Return the backend factory for ``name`` or raise.
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Args:
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name: Backend identifier (e.g. ``"docker"``). Match is exact;
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no fallback. Unknown values raise so config typos surface
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immediately instead of silently picking a default.
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"""
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backend = _BACKENDS.get(name)
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if backend is None:
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supported = ", ".join(sorted(_BACKENDS))
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raise ValueError(
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f"Unknown STRIX_RUNTIME_BACKEND: {name!r} (supported: {supported})",
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)
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logger.debug("Selected sandbox backend: %s", name)
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return backend
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def register_backend(
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name: str,
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backend: SandboxBackend,
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*,
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supports_bind_mounts: bool = False,
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) -> None:
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"""Register a custom backend under ``name``.
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Intended for downstream users who ship their own runtime — register
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before any ``session_manager.create_or_reuse`` call. Re-registering
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an existing name overwrites the prior entry. ``supports_bind_mounts``
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defaults to False: a remote runtime cannot see the caller's filesystem, so
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it is handed local sources as manifest entries to upload instead.
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"""
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_BACKENDS[name] = backend
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if supports_bind_mounts:
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_BIND_MOUNT_BACKENDS.add(name)
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else:
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_BIND_MOUNT_BACKENDS.discard(name)
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logger.info("Registered sandbox backend: %s (bind mounts: %s)", name, supports_bind_mounts)
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def backend_supports_bind_mounts(name: str) -> bool:
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return name in _BIND_MOUNT_BACKENDS
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def supported_backends() -> list[str]:
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return sorted(_BACKENDS)
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