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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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