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from pathlib import Path
import pytest
from tests.integration_tests.instances import IntegrationInstance
from tests.integration_tests.util import ASSETS_DIR, verify_clean_log
PICKLE_PATH = Path("/var/lib/cloud/instance/obj.pkl")
TEST_PICKLE = ASSETS_DIR / "test_version_change.pkl"
def _assert_no_pickle_problems(log):
assert "Failed loading pickled blob" not in log
verify_clean_log(log)
def test_reboot_without_version_change(client: IntegrationInstance):
log = client.read_from_file("/var/log/cloud-init.log")
assert "Python version change detected" not in log
assert "Cache compatibility status is currently unknown." not in log
_assert_no_pickle_problems(log)
client.restart()
log = client.read_from_file("/var/log/cloud-init.log")
assert "Python version change detected" not in log
assert "Could not determine Python version used to write cache" not in log
_assert_no_pickle_problems(log)
# Now ensure that loading a bad pickle gives us problems
client.push_file(TEST_PICKLE, PICKLE_PATH)
client.restart()
log = client.read_from_file("/var/log/cloud-init.log")
# no cache found is an "expected" upgrade error, and
# "Failed" means we're unable to load the pickle
assert any(
[
"Failed loading pickled blob from {}".format(PICKLE_PATH) in log,
"no cache found" in log,
]
)
@pytest.mark.ec2
@pytest.mark.gce
@pytest.mark.oci
@pytest.mark.openstack
@pytest.mark.lxd_container
@pytest.mark.lxd_vm
# No Azure because the cache gets purged every reboot, so we'll never
# get to the point where we need to purge cache due to version change
def test_cache_purged_on_version_change(client: IntegrationInstance):
# Start by pushing the invalid pickle so we'll hit an error if the
# cache didn't actually get purged
client.push_file(TEST_PICKLE, PICKLE_PATH)
client.execute("echo '1.0' > /var/lib/cloud/data/python-version")
client.restart()
log = client.read_from_file("/var/log/cloud-init.log")
assert "Python version change detected. Purging cache" in log
_assert_no_pickle_problems(log)
def test_log_message_on_missing_version_file(client: IntegrationInstance):
# Start by pushing a pickle so we can see the log message
client.push_file(TEST_PICKLE, PICKLE_PATH)
client.execute("rm /var/lib/cloud/data/python-version")
client.execute("rm /var/log/cloud-init.log")
client.restart()
log = client.read_from_file("/var/log/cloud-init.log")
if "no cache found" not in log:
# We don't expect the python version file to exist if we have no
# pre-existing cache
assert (
"Writing python-version file. "
"Cache compatibility status is currently unknown." in log
)
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