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import uuid
from typing import cast
import pytest
from pycloudlib.lxd.instance import LXDInstance
from cloudinit import subp
from tests.integration_tests.instances import IntegrationInstance
from tests.integration_tests.integration_settings import PLATFORM
from tests.integration_tests.releases import CURRENT_RELEASE, FOCAL
_INSTANCE_ID = uuid.uuid4()
def setup_meta_data(instance: LXDInstance):
"""Increment the instance id and apply it to the instance."""
global _INSTANCE_ID
_INSTANCE_ID = uuid.UUID(int=(1 + _INSTANCE_ID.int))
command = [
"lxc",
"config",
"set",
instance.name,
f"volatile.cloud-init.instance-id={_INSTANCE_ID}",
]
assert subp.subp(command)
# class TestInstanceID:
@pytest.mark.skipif(
PLATFORM not in ["lxd_container", "lxd_vm"] or CURRENT_RELEASE == FOCAL,
reason="Uses lxd-specific behavior.",
)
@pytest.mark.lxd_setup.with_args(setup_meta_data)
@pytest.mark.lxd_use_exec
def test_instance_id_changes(client: IntegrationInstance):
"""Verify instance id change behavior
If the id from the datasource changes, cloud-init should update the
instance id link.
"""
client.execute("cloud-init status --wait")
# check that instance id is the one we set
assert (
str(_INSTANCE_ID)
== client.execute("cloud-init query instance-id").stdout.rstrip()
)
assert (
f"/var/lib/cloud/instances/{_INSTANCE_ID}"
== client.execute(
"readlink -f /var/lib/cloud/instance"
).stdout.rstrip()
)
instance = cast(LXDInstance, client.instance)
setup_meta_data(instance)
client.restart()
client.execute("cloud-init status --wait")
# check that instance id is the one we reset
assert (
str(_INSTANCE_ID)
== client.execute("cloud-init query instance-id").stdout.rstrip()
)
assert (
f"/var/lib/cloud/instances/{_INSTANCE_ID}"
== client.execute(
"readlink -f /var/lib/cloud/instance"
).stdout.rstrip()
)
@pytest.mark.lxd_use_exec
def test_instance_id_no_changes(client: IntegrationInstance):
"""Verify instance id no change behavior
If the id from the datasource does not change, cloud-init should not
update the instance id link.
"""
instance_id = client.execute(
"cloud-init query instance-id"
).stdout.rstrip()
assert (
f"/var/lib/cloud/instances/{instance_id}"
== client.execute(
"readlink -f /var/lib/cloud/instance"
).stdout.rstrip()
)
client.restart()
client.execute("cloud-init status --wait")
assert (
instance_id
== client.execute("cloud-init query instance-id").stdout.rstrip()
)
assert (
f"/var/lib/cloud/instances/{instance_id}"
== client.execute(
"readlink -f /var/lib/cloud/instance"
).stdout.rstrip()
)
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