pyro-mcp/tests/test_vm_environments.py
Thales Maciel fc72fcd3a1 Add guest-only workspace secrets
Add explicit workspace secrets across the CLI, SDK, and MCP, with create-time secret definitions and per-call secret-to-env mapping for exec, shell open, and service start. Persist only safe secret metadata in workspace records, materialize secret files under /run/pyro-secrets, and redact secret values from exec output, shell reads, service logs, and surfaced errors.

Fix the remaining real-guest shell gap by shipping bundled guest init alongside the guest agent and patching both into guest-backed workspace rootfs images before boot. The new init mounts devpts so PTY shells work on Firecracker guests, while reset continues to recreate the sandbox and re-materialize secrets from stored task-local secret material.

Validation: uv lock; UV_CACHE_DIR=.uv-cache make check; UV_CACHE_DIR=.uv-cache make dist-check; and a real guest-backed Firecracker smoke covering workspace create with secrets, secret-backed exec, shell, service, reset, and delete.
2026-03-12 15:43:34 -03:00

506 lines
19 KiB
Python

from __future__ import annotations
import hashlib
import io
import json
import tarfile
import urllib.error
import urllib.request
from email.message import Message
from pathlib import Path
import pytest
from pyro_mcp.runtime import RuntimePaths, resolve_runtime_paths
from pyro_mcp.vm_environments import (
EnvironmentStore,
VmEnvironment,
get_environment,
list_environments,
)
class FakeResponse:
def __init__(self, payload: bytes, *, headers: dict[str, str] | None = None) -> None:
self._buffer = io.BytesIO(payload)
self.headers = headers or {}
def read(self, size: int = -1) -> bytes:
return self._buffer.read(size)
def __enter__(self) -> FakeResponse:
return self
def __exit__(self, exc_type: object, exc: object, tb: object) -> None:
del exc_type, exc, tb
def _fake_runtime_paths(tmp_path: Path) -> RuntimePaths:
bundle_parent = tmp_path / "runtime"
bundle_root = bundle_parent / "linux-x86_64"
manifest_path = bundle_root / "manifest.json"
firecracker_bin = bundle_root / "bin" / "firecracker"
jailer_bin = bundle_root / "bin" / "jailer"
guest_agent_path = bundle_root / "guest" / "pyro_guest_agent.py"
guest_init_path = bundle_root / "guest" / "pyro-init"
artifacts_dir = bundle_root / "profiles"
notice_path = bundle_parent / "NOTICE"
artifacts_dir.mkdir(parents=True, exist_ok=True)
firecracker_bin.parent.mkdir(parents=True, exist_ok=True)
jailer_bin.parent.mkdir(parents=True, exist_ok=True)
guest_agent_path.parent.mkdir(parents=True, exist_ok=True)
manifest_path.write_text('{"platform": "linux-x86_64"}\n', encoding="utf-8")
firecracker_bin.write_text("firecracker\n", encoding="utf-8")
jailer_bin.write_text("jailer\n", encoding="utf-8")
guest_agent_path.write_text("print('guest')\n", encoding="utf-8")
guest_init_path.write_text("#!/bin/sh\n", encoding="utf-8")
notice_path.write_text("notice\n", encoding="utf-8")
return RuntimePaths(
bundle_root=bundle_root,
manifest_path=manifest_path,
firecracker_bin=firecracker_bin,
jailer_bin=jailer_bin,
guest_agent_path=guest_agent_path,
guest_init_path=guest_init_path,
artifacts_dir=artifacts_dir,
notice_path=notice_path,
manifest={"platform": "linux-x86_64"},
)
def _write_local_profile(
runtime_paths: RuntimePaths,
profile_name: str,
*,
kernel: str = "kernel\n",
rootfs: str = "rootfs\n",
) -> None:
profile_dir = runtime_paths.artifacts_dir / profile_name
profile_dir.mkdir(parents=True, exist_ok=True)
(profile_dir / "vmlinux").write_text(kernel, encoding="utf-8")
(profile_dir / "rootfs.ext4").write_text(rootfs, encoding="utf-8")
def _sha256_digest(payload: bytes) -> str:
return f"sha256:{hashlib.sha256(payload).hexdigest()}"
def _layer_archive(filename: str, content: bytes) -> bytes:
archive_buffer = io.BytesIO()
with tarfile.open(fileobj=archive_buffer, mode="w:gz") as archive:
info = tarfile.TarInfo(name=filename)
info.size = len(content)
archive.addfile(info, io.BytesIO(content))
return archive_buffer.getvalue()
def _authorization_header(request: object) -> str | None:
if isinstance(request, urllib.request.Request):
for key, value in request.header_items():
if key.lower() == "authorization":
return value
return None
def _http_headers(headers: dict[str, str]) -> Message:
message = Message()
for key, value in headers.items():
message[key] = value
return message
def test_list_environments_includes_expected_entries() -> None:
environments = list_environments(runtime_paths=resolve_runtime_paths())
names = {str(entry["name"]) for entry in environments}
assert {"debian:12", "debian:12-base", "debian:12-build"} <= names
def test_get_environment_rejects_unknown() -> None:
with pytest.raises(ValueError, match="unknown environment"):
get_environment("does-not-exist")
def test_environment_store_installs_from_local_runtime_source(tmp_path: Path) -> None:
runtime_paths = _fake_runtime_paths(tmp_path)
_write_local_profile(runtime_paths, "debian-git")
store = EnvironmentStore(runtime_paths=runtime_paths, cache_dir=tmp_path / "cache")
installed = store.ensure_installed("debian:12")
assert installed.kernel_image.exists()
assert installed.rootfs_image.exists()
assert (installed.install_dir / "environment.json").exists()
def test_environment_store_pull_and_cached_inspect(tmp_path: Path) -> None:
runtime_paths = _fake_runtime_paths(tmp_path)
_write_local_profile(runtime_paths, "debian-git")
store = EnvironmentStore(runtime_paths=runtime_paths, cache_dir=tmp_path / "cache")
before = store.inspect_environment("debian:12")
assert before["installed"] is False
pulled = store.pull_environment("debian:12")
assert pulled["installed"] is True
assert "install_manifest" in pulled
cached = store.ensure_installed("debian:12")
assert cached.installed is True
after = store.inspect_environment("debian:12")
assert after["installed"] is True
assert "install_manifest" in after
def test_environment_store_uses_env_override_for_default_cache_dir(
monkeypatch: pytest.MonkeyPatch, tmp_path: Path
) -> None:
monkeypatch.setenv("PYRO_ENVIRONMENT_CACHE_DIR", str(tmp_path / "override-cache"))
store = EnvironmentStore(runtime_paths=resolve_runtime_paths())
assert store.cache_dir == tmp_path / "override-cache"
def test_environment_store_installs_from_archive_when_runtime_source_missing(
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
runtime_paths = _fake_runtime_paths(tmp_path)
source_environment = get_environment("debian:12-base", runtime_paths=runtime_paths)
archive_dir = tmp_path / "archive"
archive_dir.mkdir(parents=True, exist_ok=True)
(archive_dir / "vmlinux").write_text("kernel\n", encoding="utf-8")
(archive_dir / "rootfs.ext4").write_text("rootfs\n", encoding="utf-8")
archive_path = tmp_path / "environment.tgz"
with tarfile.open(archive_path, "w:gz") as archive:
archive.add(archive_dir / "vmlinux", arcname="vmlinux")
archive.add(archive_dir / "rootfs.ext4", arcname="rootfs.ext4")
monkeypatch.setattr(
"pyro_mcp.vm_environments.CATALOG",
{
"debian:12-base": source_environment.__class__(
name=source_environment.name,
version=source_environment.version,
description=source_environment.description,
default_packages=source_environment.default_packages,
distribution=source_environment.distribution,
distribution_version=source_environment.distribution_version,
source_profile=source_environment.source_profile,
platform=source_environment.platform,
source_url=archive_path.resolve().as_uri(),
source_digest=source_environment.source_digest,
compatibility=source_environment.compatibility,
)
},
)
store = EnvironmentStore(
runtime_paths=runtime_paths,
cache_dir=tmp_path / "cache",
)
installed = store.ensure_installed("debian:12-base")
assert installed.kernel_image.read_text(encoding="utf-8") == "kernel\n"
assert installed.rootfs_image.read_text(encoding="utf-8") == "rootfs\n"
def test_environment_store_skips_empty_local_source_dir_and_uses_archive(
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
runtime_paths = _fake_runtime_paths(tmp_path)
source_environment = get_environment("debian:12-base", runtime_paths=runtime_paths)
(runtime_paths.artifacts_dir / source_environment.source_profile).mkdir(
parents=True,
exist_ok=True,
)
archive_dir = tmp_path / "archive"
archive_dir.mkdir(parents=True, exist_ok=True)
(archive_dir / "vmlinux").write_text("kernel\n", encoding="utf-8")
(archive_dir / "rootfs.ext4").write_text("rootfs\n", encoding="utf-8")
archive_path = tmp_path / "environment.tgz"
with tarfile.open(archive_path, "w:gz") as archive:
archive.add(archive_dir / "vmlinux", arcname="vmlinux")
archive.add(archive_dir / "rootfs.ext4", arcname="rootfs.ext4")
monkeypatch.setattr(
"pyro_mcp.vm_environments.CATALOG",
{
"debian:12-base": source_environment.__class__(
name=source_environment.name,
version=source_environment.version,
description=source_environment.description,
default_packages=source_environment.default_packages,
distribution=source_environment.distribution,
distribution_version=source_environment.distribution_version,
source_profile=source_environment.source_profile,
platform=source_environment.platform,
source_url=archive_path.resolve().as_uri(),
source_digest=source_environment.source_digest,
compatibility=source_environment.compatibility,
)
},
)
store = EnvironmentStore(runtime_paths=runtime_paths, cache_dir=tmp_path / "cache")
installed = store.ensure_installed("debian:12-base")
assert installed.kernel_image.read_text(encoding="utf-8") == "kernel\n"
assert installed.rootfs_image.read_text(encoding="utf-8") == "rootfs\n"
def test_environment_store_marks_broken_symlink_install_uninstalled_and_repairs_it(
tmp_path: Path,
) -> None:
runtime_paths = _fake_runtime_paths(tmp_path)
_write_local_profile(
runtime_paths,
"debian-git",
kernel="kernel-fixed\n",
rootfs="rootfs-fixed\n",
)
store = EnvironmentStore(runtime_paths=runtime_paths, cache_dir=tmp_path / "cache")
spec = get_environment("debian:12", runtime_paths=runtime_paths)
install_dir = store.cache_dir / "linux-x86_64" / "debian_12-1.0.0"
install_dir.mkdir(parents=True, exist_ok=True)
(install_dir / "environment.json").write_text(
json.dumps(
{
"catalog_version": "2.0.0",
"name": spec.name,
"version": spec.version,
"source": "bundled-runtime-source",
"source_digest": spec.source_digest,
"installed_at": 0,
}
),
encoding="utf-8",
)
(install_dir / "vmlinux").symlink_to("missing-vmlinux")
(install_dir / "rootfs.ext4").symlink_to("missing-rootfs.ext4")
inspected_before = store.inspect_environment("debian:12")
assert inspected_before["installed"] is False
pulled = store.pull_environment("debian:12")
assert pulled["installed"] is True
assert Path(str(pulled["kernel_image"])).read_text(encoding="utf-8") == "kernel-fixed\n"
assert Path(str(pulled["rootfs_image"])).read_text(encoding="utf-8") == "rootfs-fixed\n"
def test_environment_store_prunes_stale_entries(tmp_path: Path) -> None:
store = EnvironmentStore(runtime_paths=resolve_runtime_paths(), cache_dir=tmp_path / "cache")
platform_dir = store.cache_dir / "linux-x86_64"
platform_dir.mkdir(parents=True, exist_ok=True)
(platform_dir / ".partial-download").mkdir()
(platform_dir / "missing-marker").mkdir()
invalid = platform_dir / "invalid"
invalid.mkdir()
(invalid / "environment.json").write_text('{"name": 1, "version": 2}', encoding="utf-8")
unknown = platform_dir / "unknown"
unknown.mkdir()
(unknown / "environment.json").write_text(
'{"name": "unknown:1", "version": "1.0.0"}',
encoding="utf-8",
)
stale = platform_dir / "stale"
stale.mkdir()
(stale / "environment.json").write_text(
'{"name": "debian:12", "version": "0.9.0"}',
encoding="utf-8",
)
result = store.prune_environments()
assert result["count"] == 5
def test_fetch_oci_manifest_resolves_linux_amd64_index_with_bearer_auth(
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
runtime_paths = _fake_runtime_paths(tmp_path)
store = EnvironmentStore(runtime_paths=runtime_paths, cache_dir=tmp_path / "cache")
spec = VmEnvironment(
name="debian:12-registry",
version="1.0.0",
description="OCI-backed environment",
default_packages=("bash", "git"),
distribution="debian",
distribution_version="12",
source_profile="missing-profile",
oci_registry="registry-1.docker.io",
oci_repository="thalesmaciel/pyro-environment-debian-12",
oci_reference="1.0.0",
)
child_manifest = {
"schemaVersion": 2,
"mediaType": "application/vnd.oci.image.manifest.v1+json",
"layers": [],
}
child_payload = json.dumps(child_manifest).encode("utf-8")
child_digest = _sha256_digest(child_payload)
index_manifest = {
"schemaVersion": 2,
"mediaType": "application/vnd.oci.image.index.v1+json",
"manifests": [
{
"digest": "sha256:arm64digest",
"mediaType": "application/vnd.oci.image.manifest.v1+json",
"platform": {"os": "linux", "architecture": "arm64"},
},
{
"digest": child_digest,
"mediaType": "application/vnd.oci.image.manifest.v1+json",
"platform": {"os": "linux", "architecture": "amd64"},
},
],
}
index_payload = json.dumps(index_manifest).encode("utf-8")
index_digest = _sha256_digest(index_payload)
authorized_urls: list[str] = []
def fake_urlopen(request: object, timeout: int = 90) -> FakeResponse:
del timeout
url = request.full_url if isinstance(request, urllib.request.Request) else str(request)
if url.startswith("https://auth.docker.io/token?"):
return FakeResponse(b'{"token":"secret-token"}')
authorization = _authorization_header(request)
if url.endswith("/manifests/1.0.0"):
if authorization is None:
raise urllib.error.HTTPError(
url,
401,
"Unauthorized",
_http_headers(
{
"WWW-Authenticate": (
'Bearer realm="https://auth.docker.io/token",'
'service="registry.docker.io",'
'scope="repository:thalesmaciel/pyro-environment-debian-12:pull"'
)
}
),
io.BytesIO(b""),
)
authorized_urls.append(url)
return FakeResponse(
index_payload,
headers={"Docker-Content-Digest": index_digest},
)
if url.endswith(f"/manifests/{child_digest}"):
if authorization is None:
raise urllib.error.HTTPError(
url,
401,
"Unauthorized",
_http_headers(
{
"WWW-Authenticate": (
'Bearer realm="https://auth.docker.io/token",'
'service="registry.docker.io",'
'scope="repository:thalesmaciel/pyro-environment-debian-12:pull"'
)
}
),
io.BytesIO(b""),
)
authorized_urls.append(url)
assert authorization == "Bearer secret-token"
return FakeResponse(
child_payload,
headers={"Docker-Content-Digest": child_digest},
)
raise AssertionError(f"unexpected OCI request: {url}")
monkeypatch.setattr(urllib.request, "urlopen", fake_urlopen)
manifest, resolved_digest = store._fetch_oci_manifest(spec) # noqa: SLF001
assert manifest == child_manifest
assert resolved_digest == child_digest
assert authorized_urls == [
"https://registry-1.docker.io/v2/thalesmaciel/pyro-environment-debian-12/manifests/1.0.0",
(
"https://registry-1.docker.io/v2/thalesmaciel/pyro-environment-debian-12/"
f"manifests/{child_digest}"
),
]
def test_environment_store_installs_from_oci_when_runtime_source_missing(
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
runtime_paths = _fake_runtime_paths(tmp_path)
kernel_layer = _layer_archive("vmlinux", b"kernel\n")
rootfs_layer = _layer_archive("rootfs.ext4", b"rootfs\n")
kernel_digest = _sha256_digest(kernel_layer)
rootfs_digest = _sha256_digest(rootfs_layer)
manifest = {
"schemaVersion": 2,
"mediaType": "application/vnd.oci.image.manifest.v1+json",
"layers": [
{
"mediaType": "application/vnd.oci.image.layer.v1.tar+gzip",
"digest": kernel_digest,
"size": len(kernel_layer),
},
{
"mediaType": "application/vnd.oci.image.layer.v1.tar+gzip",
"digest": rootfs_digest,
"size": len(rootfs_layer),
},
],
}
manifest_payload = json.dumps(manifest).encode("utf-8")
manifest_digest = _sha256_digest(manifest_payload)
environment = VmEnvironment(
name="debian:12-registry",
version="1.0.0",
description="OCI-backed environment",
default_packages=("bash", "git"),
distribution="debian",
distribution_version="12",
source_profile="missing-profile",
oci_registry="registry-1.docker.io",
oci_repository="thalesmaciel/pyro-environment-debian-12",
oci_reference="1.0.0",
)
def fake_urlopen(request: object, timeout: int = 90) -> FakeResponse:
del timeout
url = request.full_url if isinstance(request, urllib.request.Request) else str(request)
if url.endswith("/manifests/1.0.0"):
return FakeResponse(
manifest_payload,
headers={"Docker-Content-Digest": manifest_digest},
)
if url.endswith(f"/blobs/{kernel_digest}"):
return FakeResponse(kernel_layer)
if url.endswith(f"/blobs/{rootfs_digest}"):
return FakeResponse(rootfs_layer)
raise AssertionError(f"unexpected OCI request: {url}")
monkeypatch.setattr(urllib.request, "urlopen", fake_urlopen)
monkeypatch.setattr(
"pyro_mcp.vm_environments.CATALOG",
{environment.name: environment},
)
store = EnvironmentStore(runtime_paths=runtime_paths, cache_dir=tmp_path / "cache")
installed = store.ensure_installed(environment.name)
assert installed.kernel_image.read_text(encoding="utf-8") == "kernel\n"
assert installed.rootfs_image.read_text(encoding="utf-8") == "rootfs\n"
assert installed.source == (
"oci://registry-1.docker.io/thalesmaciel/pyro-environment-debian-12"
f"@{manifest_digest}"
)
metadata = json.loads((installed.install_dir / "environment.json").read_text(encoding="utf-8"))
assert metadata["source_digest"] == manifest_digest