Files
cibuildwheel/unit_test/oci_container_test.py
T
2023-11-24 10:33:21 +00:00

444 lines
16 KiB
Python

from __future__ import annotations
import json
import os
import platform
import random
import shutil
import subprocess
import textwrap
from pathlib import Path, PurePath, PurePosixPath
import pytest
import tomli_w
from cibuildwheel.environment import EnvironmentAssignmentBash
from cibuildwheel.oci_container import OCIContainer, OCIContainerEngineConfig
from cibuildwheel.util import CIProvider, detect_ci_provider
# Test utilities
# for these tests we use manylinux2014 images, because they're available on
# multi architectures and include python3.8
DEFAULT_IMAGE_TEMPLATE = "quay.io/pypa/manylinux2014_{machine}:2023-09-04-0828984"
pm = platform.machine()
if pm in {"x86_64", "ppc64le", "s390x"}:
DEFAULT_IMAGE = DEFAULT_IMAGE_TEMPLATE.format(machine=pm)
elif pm in {"aarch64", "arm64"}:
DEFAULT_IMAGE = DEFAULT_IMAGE_TEMPLATE.format(machine="aarch64")
else:
DEFAULT_IMAGE = ""
PODMAN = OCIContainerEngineConfig(name="podman")
@pytest.fixture(params=["docker", "podman"], scope="module")
def container_engine(request):
if request.param == "docker" and not request.config.getoption("--run-docker"):
pytest.skip("need --run-docker option to run")
if request.param == "podman" and not request.config.getoption("--run-podman"):
pytest.skip("need --run-podman option to run")
def get_images() -> set[str]:
if detect_ci_provider() is None:
return set()
images = subprocess.run(
[request.param, "image", "ls", "--format", "{{json .ID}}"],
text=True,
check=True,
stdout=subprocess.PIPE,
).stdout
return {json.loads(image.strip()) for image in images.splitlines() if image.strip()}
images_before = get_images()
try:
yield OCIContainerEngineConfig(name=request.param)
finally:
images_after = get_images()
for image in images_after - images_before:
subprocess.run([request.param, "rmi", image], check=False)
# Tests
def test_simple(container_engine):
with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
assert container.call(["echo", "hello"], capture_output=True) == "hello\n"
def test_no_lf(container_engine):
with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
assert container.call(["printf", "hello"], capture_output=True) == "hello"
def test_debug_info(container_engine):
container = OCIContainer(engine=container_engine, image=DEFAULT_IMAGE)
print(container.debug_info())
with container:
pass
def test_environment(container_engine):
with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
assert (
container.call(
["sh", "-c", "echo $TEST_VAR"], env={"TEST_VAR": "1"}, capture_output=True
)
== "1\n"
)
def test_environment_pass(container_engine, monkeypatch):
monkeypatch.setenv("CIBUILDWHEEL", "1")
monkeypatch.setenv("SOURCE_DATE_EPOCH", "1489957071")
with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
assert container.call(["sh", "-c", "echo $CIBUILDWHEEL"], capture_output=True) == "1\n"
assert (
container.call(["sh", "-c", "echo $SOURCE_DATE_EPOCH"], capture_output=True)
== "1489957071\n"
)
def test_cwd(container_engine):
with OCIContainer(
engine=container_engine, image=DEFAULT_IMAGE, cwd="/cibuildwheel/working_directory"
) as container:
assert container.call(["pwd"], capture_output=True) == "/cibuildwheel/working_directory\n"
assert container.call(["pwd"], capture_output=True, cwd="/opt") == "/opt\n"
def test_container_removed(container_engine):
with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
docker_containers_listing = subprocess.run(
f"{container.engine.name} container ls",
shell=True,
check=True,
stdout=subprocess.PIPE,
text=True,
).stdout
assert container.name is not None
assert container.name in docker_containers_listing
old_container_name = container.name
docker_containers_listing = subprocess.run(
f"{container.engine.name} container ls",
shell=True,
check=True,
stdout=subprocess.PIPE,
text=True,
).stdout
assert old_container_name not in docker_containers_listing
def test_large_environment(container_engine):
# max environment variable size is 128kB
long_env_var_length = 127 * 1024
large_environment = {
"a": "0" * long_env_var_length,
"b": "0" * long_env_var_length,
"c": "0" * long_env_var_length,
"d": "0" * long_env_var_length,
}
with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
# check the length of d
assert (
container.call(["sh", "-c", "echo ${#d}"], env=large_environment, capture_output=True)
== f"{long_env_var_length}\n"
)
def test_binary_output(container_engine):
with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
# note: the below embedded snippets are in python2
# check that we can pass though arbitrary binary data without erroring
container.call(
[
"/usr/bin/python2",
"-c",
textwrap.dedent(
"""
import sys
sys.stdout.write(''.join(chr(n) for n in range(0, 256)))
"""
),
]
)
# check that we can capture arbitrary binary data
output = container.call(
[
"/usr/bin/python2",
"-c",
textwrap.dedent(
"""
import sys
sys.stdout.write(''.join(chr(n % 256) for n in range(0, 512)))
"""
),
],
capture_output=True,
)
data = bytes(output, encoding="utf8", errors="surrogateescape")
for i in range(512):
assert data[i] == i % 256
# check that environment variables can carry binary data, except null characters
# (https://www.gnu.org/software/libc/manual/html_node/Environment-Variables.html)
binary_data = bytes(n for n in range(1, 256))
binary_data_string = str(binary_data, encoding="utf8", errors="surrogateescape")
output = container.call(
["python2", "-c", 'import os, sys; sys.stdout.write(os.environ["TEST_VAR"])'],
env={"TEST_VAR": binary_data_string},
capture_output=True,
)
assert output == binary_data_string
def test_file_operation(tmp_path: Path, container_engine):
with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
# test copying a file in
test_binary_data = bytes(random.randrange(256) for _ in range(1000))
original_test_file = tmp_path / "test.dat"
original_test_file.write_bytes(test_binary_data)
dst_file = PurePath("/tmp/test.dat")
container.copy_into(original_test_file, dst_file)
output = container.call(["cat", dst_file], capture_output=True)
assert test_binary_data == bytes(output, encoding="utf8", errors="surrogateescape")
def test_dir_operations(tmp_path: Path, container_engine):
with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
test_binary_data = bytes(random.randrange(256) for _ in range(1000))
original_test_file = tmp_path / "test.dat"
original_test_file.write_bytes(test_binary_data)
# test copying a dir in
test_dir = tmp_path / "test_dir"
test_dir.mkdir()
test_file = test_dir / "test.dat"
shutil.copyfile(original_test_file, test_file)
dst_dir = PurePosixPath("/tmp/test_dir")
dst_file = dst_dir / "test.dat"
container.copy_into(test_dir, dst_dir)
output = container.call(["cat", dst_file], capture_output=True)
assert test_binary_data == bytes(output, encoding="utf8", errors="surrogateescape")
# test glob
assert container.glob(dst_dir, "*.dat") == [dst_file]
# test copy dir out
new_test_dir = tmp_path / "test_dir_new"
container.copy_out(dst_dir, new_test_dir)
assert test_binary_data == (new_test_dir / "test.dat").read_bytes()
def test_environment_executor(container_engine):
with OCIContainer(engine=container_engine, image=DEFAULT_IMAGE) as container:
assignment = EnvironmentAssignmentBash("TEST=$(echo 42)")
assert assignment.evaluated_value({}, container.environment_executor) == "42"
def test_podman_vfs(tmp_path: Path, monkeypatch, container_engine):
if container_engine.name != "podman":
pytest.skip("only runs with podman")
# create the VFS configuration
vfs_path = tmp_path / "podman_vfs"
vfs_path.mkdir()
# This requires that we write configuration files and point to them
# with environment variables before we run podman
# https://github.com/containers/common/blob/main/docs/containers.conf.5.md
vfs_containers_conf_data = {
"containers": {
"default_capabilities": [
"CHOWN",
"DAC_OVERRIDE",
"FOWNER",
"FSETID",
"KILL",
"NET_BIND_SERVICE",
"SETFCAP",
"SETGID",
"SETPCAP",
"SETUID",
"SYS_CHROOT",
]
},
"engine": {"cgroup_manager": "cgroupfs", "events_logger": "file"},
}
# https://github.com/containers/storage/blob/main/docs/containers-storage.conf.5.md
storage_root = vfs_path / ".local/share/containers/vfs-storage"
run_root = vfs_path / ".local/share/containers/vfs-runroot"
storage_root.mkdir(parents=True, exist_ok=True)
run_root.mkdir(parents=True, exist_ok=True)
vfs_containers_storage_conf_data = {
"storage": {
"driver": "vfs",
"graphroot": os.fspath(storage_root),
"runroot": os.fspath(run_root),
"rootless_storage_path": os.fspath(storage_root),
"options": {
# "remap-user": "containers",
"aufs": {"mountopt": "rw"},
"overlay": {"mountopt": "rw", "force_mask": "shared"},
# "vfs": {"ignore_chown_errors": "true"},
},
}
}
vfs_containers_conf_fpath = vfs_path / "temp_vfs_containers.conf"
vfs_containers_storage_conf_fpath = vfs_path / "temp_vfs_containers_storage.conf"
with open(vfs_containers_conf_fpath, "wb") as file:
tomli_w.dump(vfs_containers_conf_data, file)
with open(vfs_containers_storage_conf_fpath, "wb") as file:
tomli_w.dump(vfs_containers_storage_conf_data, file)
monkeypatch.setenv("CONTAINERS_CONF", str(vfs_containers_conf_fpath))
monkeypatch.setenv("CONTAINERS_STORAGE_CONF", str(vfs_containers_storage_conf_fpath))
with OCIContainer(engine=PODMAN, image=DEFAULT_IMAGE) as container:
# test running a command
assert container.call(["echo", "hello"], capture_output=True) == "hello\n"
# test copying a file into the container
(tmp_path / "some_file.txt").write_text("1234")
container.copy_into(tmp_path / "some_file.txt", PurePosixPath("some_file.txt"))
assert container.call(["cat", "some_file.txt"], capture_output=True) == "1234"
# Clean up
# When using the VFS, user is not given write permissions by default in
# new directories. As a workaround we use 'podman unshare' to delete them
# as UID 0. The reason why permission errors occur on podman is documented
# in https://podman.io/blogs/2018/10/03/podman-remove-content-homedir.html
subprocess.run(["podman", "unshare", "rm", "-rf", vfs_path], check=True)
def test_create_args_volume(tmp_path: Path, container_engine):
if container_engine.name != "docker":
pytest.skip("only runs with docker")
if "CIRCLECI" in os.environ or "GITLAB_CI" in os.environ:
pytest.skip(
"Skipping test on CircleCI/GitLab because docker there does not support --volume"
)
test_mount_dir = tmp_path / "test_mount"
test_mount_dir.mkdir()
(test_mount_dir / "test_file.txt").write_text("1234")
container_engine = OCIContainerEngineConfig(
name="docker", create_args=[f"--volume={test_mount_dir}:/test_mount"]
)
with OCIContainer(
engine=container_engine,
image=DEFAULT_IMAGE,
) as container:
assert container.call(["cat", "/test_mount/test_file.txt"], capture_output=True) == "1234"
@pytest.mark.parametrize(
("config", "name", "create_args"),
[
(
"docker",
"docker",
[],
),
(
"docker;create_args:",
"docker",
[],
),
(
"docker;create_args:--abc --def",
"docker",
["--abc", "--def"],
),
(
"docker; create_args: --abc --def",
"docker",
["--abc", "--def"],
),
(
"name:docker; create_args: --abc --def",
"docker",
["--abc", "--def"],
),
(
'docker; create_args: --some-option="value with spaces"',
"docker",
["--some-option=value with spaces"],
),
(
'docker; create_args: --some-option="value; with; semicolons" --another-option',
"docker",
["--some-option=value; with; semicolons", "--another-option"],
),
],
)
def test_parse_engine_config(config, name, create_args):
engine_config = OCIContainerEngineConfig.from_config_string(config)
assert engine_config.name == name
assert engine_config.create_args == create_args
@pytest.mark.skipif(pm != "x86_64", reason="Only runs on x86_64")
@pytest.mark.parametrize(
("image", "shell_args"),
[
(DEFAULT_IMAGE_TEMPLATE.format(machine="i686"), ["/bin/bash"]),
(DEFAULT_IMAGE_TEMPLATE.format(machine="x86_64"), ["linux32", "/bin/bash"]),
],
)
def test_enforce_32_bit(container_engine, image, shell_args):
with OCIContainer(engine=container_engine, image=image, enforce_32_bit=True) as container:
assert container.call(["uname", "-m"], capture_output=True).strip() == "i686"
container_args = subprocess.run(
f"{container.engine.name} inspect -f '{{{{json .Args }}}}' {container.name}",
shell=True,
check=True,
stdout=subprocess.PIPE,
text=True,
).stdout
assert json.loads(container_args) == shell_args
@pytest.mark.parametrize(
("config", "should_have_host_mount"),
[
("{name}", True),
("{name}; disable_host_mount: false", True),
("{name}; disable_host_mount: true", False),
],
)
def test_disable_host_mount(tmp_path: Path, container_engine, config, should_have_host_mount):
if detect_ci_provider() in {CIProvider.circle_ci, CIProvider.gitlab}:
pytest.skip("Skipping test because docker on this platform does not support host mounts")
engine = OCIContainerEngineConfig.from_config_string(config.format(name=container_engine.name))
sentinel_file = tmp_path / "sentinel"
sentinel_file.write_text("12345")
with OCIContainer(engine=engine, image=DEFAULT_IMAGE) as container:
host_mount_path = "/host" + str(sentinel_file)
if should_have_host_mount:
assert container.call(["cat", host_mount_path], capture_output=True) == "12345"
else:
with pytest.raises(subprocess.CalledProcessError):
container.call(["cat", host_mount_path], capture_output=True)