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"""
Helpers for integration tests using DockerClient
"""
import json
import os
import pathlib
import shutil
import subprocess
import tempfile
from docker import DockerClient
from .compat import constant
class PodmanAPI:
"""
Instances hold the configuration and setup for running podman commands
"""
def __init__(self):
"""Initialize a Podman instance with global options"""
binary = os.getenv("PODMAN", "bin/podman")
self.cmd = [binary, "--storage-driver=vfs"]
cgroupfs = os.getenv("CGROUP_MANAGER", "systemd")
self.cmd.append(f"--cgroup-manager={cgroupfs}")
# No support for tmpfs (/tmp) or extfs (/var/tmp)
# self.cmd.append("--storage-driver=overlay")
if os.getenv("PODMAN_PYTHON_TEST_DEBUG"):
self.cmd.append("--log-level=debug")
self.cmd.append("--syslog=true")
self.anchor_directory = tempfile.mkdtemp(prefix="podman_docker_")
self.image_cache = os.path.join(self.anchor_directory, "cache")
os.makedirs(self.image_cache, exist_ok=True)
self.cmd.append("--root=" + os.path.join(self.anchor_directory, "crio"))
self.cmd.append("--runroot=" + os.path.join(self.anchor_directory, "crio-run"))
os.environ["CONTAINERS_REGISTRIES_CONF"] = os.path.join(
self.anchor_directory, "registry.conf"
)
# Entry verified by compat/test_system.py
reg_conf_sfx = """
[[registry.mirror]]
location = "mirror.localhost:5000"
"""
# Assume developer-mode testing by default
reg_conf_source_path="./test/registries.conf"
# When operating in a CI environment, use the local registry server.
# Ref: https://github.com/containers/automation_images/pull/357
# https://github.com/containers/podman/pull/22726
if os.getenv("CI_USE_REGISTRY_CACHE"):
reg_conf_source_path = "./test/registries-cached.conf"
with open(os.path.join(reg_conf_source_path)) as file:
conf = file.read() + reg_conf_sfx
with open(os.environ["CONTAINERS_REGISTRIES_CONF"], "w") as file:
file.write(conf)
def open(self, command, *args, **kwargs):
"""Podman initialized instance to run a given command
:param self: Podman instance
:param command: podman sub-command to run
:param args: arguments and options for command
:param kwargs: See subprocess.Popen() for shell keyword
:return: subprocess.Popen() instance configured to run podman instance
"""
cmd = self.cmd.copy()
cmd.append(command)
cmd.extend(args)
shell = kwargs.get("shell", False)
# pylint: disable=consider-using-with
return subprocess.Popen(
cmd,
shell=shell,
stdin=subprocess.DEVNULL,
stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL,
)
def run(self, command, *args, **kwargs):
"""Podman initialized instance to run a given command
:param self: Podman instance
:param command: podman sub-command to run
:param args: arguments and options for command
:param kwargs: See subprocess.Popen() for shell and check keywords
:return: subprocess.Popen() instance configured to run podman instance
"""
cmd = self.cmd.copy()
cmd.append(command)
cmd.extend(args)
check = kwargs.get("check", False)
shell = kwargs.get("shell", False)
return subprocess.run(
cmd,
shell=shell,
check=check,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
)
def tear_down(self):
"""Delete test environment."""
shutil.rmtree(self.anchor_directory, ignore_errors=True)
def restore_image_from_cache(self, client: DockerClient):
"""Populate images from cache."""
path = os.path.join(self.image_cache, constant.ALPINE_TARBALL)
if not os.path.exists(path):
img = client.images.pull(constant.ALPINE)
with open(path, mode="wb") as tarball:
for frame in img.save(named=True):
tarball.write(frame)
else:
self.run("load", "-i", path, check=True)
def flush_image_cache(self):
"""Delete image cache."""
for file in pathlib.Path(self.image_cache).glob("*.tar"):
file.unlink(missing_ok=True)
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