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import json
import os
from uuid import uuid4
import pytest
from pycloudlib.lxd.instance import LXDInstance
from cloudinit.subp import subp
from tests.integration_tests.instances import IntegrationInstance
from tests.integration_tests.util import verify_clean_log
DISK_PATH = "/tmp/test_disk_setup_{}".format(uuid4())
def setup_and_mount_lxd_disk(instance: LXDInstance):
subp(
"lxc config device add {} test-disk-setup-disk disk source={}".format(
instance.name, DISK_PATH
).split()
)
@pytest.fixture
def create_disk():
# 640k should be enough for anybody
subp("dd if=/dev/zero of={} bs=1k count=640".format(DISK_PATH).split())
yield
os.remove(DISK_PATH)
ALIAS_USERDATA = """\
#cloud-config
device_aliases:
my_alias: /dev/sdb
disk_setup:
my_alias:
table_type: mbr
layout: [50, 50]
overwrite: True
fs_setup:
- label: fs1
device: my_alias.1
filesystem: ext4
- label: fs2
device: my_alias.2
filesystem: ext4
mounts:
- ["my_alias.1", "/mnt1"]
- ["my_alias.2", "/mnt2"]
"""
@pytest.mark.user_data(ALIAS_USERDATA)
@pytest.mark.lxd_setup.with_args(setup_and_mount_lxd_disk)
@pytest.mark.ubuntu
@pytest.mark.lxd_vm
class TestDeviceAliases:
"""Test devices aliases work on disk setup/mount"""
def test_device_alias(self, create_disk, client: IntegrationInstance):
log = client.read_from_file("/var/log/cloud-init.log")
assert (
"updated disk_setup device entry 'my_alias' to '/dev/sdb'" in log
)
assert "changed my_alias.1 => /dev/sdb1" in log
assert "changed my_alias.2 => /dev/sdb2" in log
verify_clean_log(log)
lsblk = json.loads(client.execute("lsblk --json"))
sdb = [x for x in lsblk["blockdevices"] if x["name"] == "sdb"][0]
assert len(sdb["children"]) == 2
assert sdb["children"][0]["name"] == "sdb1"
assert sdb["children"][1]["name"] == "sdb2"
if "mountpoint" in sdb["children"][0]:
assert sdb["children"][0]["mountpoint"] == "/mnt1"
assert sdb["children"][1]["mountpoint"] == "/mnt2"
else:
assert sdb["children"][0]["mountpoints"] == ["/mnt1"]
assert sdb["children"][1]["mountpoints"] == ["/mnt2"]
result = client.execute("mount -a")
assert result.return_code == 0
assert result.stdout.strip() == ""
assert result.stderr.strip() == ""
result = client.execute("findmnt -J /mnt1")
assert result.return_code == 0
result = client.execute("findmnt -J /mnt2")
assert result.return_code == 0
PARTPROBE_USERDATA = """\
#cloud-config
disk_setup:
/dev/sdb:
table_type: mbr
layout: [50, 50]
overwrite: True
fs_setup:
- label: test
device: /dev/sdb1
filesystem: ext4
- label: test2
device: /dev/sdb2
filesystem: ext4
mounts:
- ["/dev/sdb1", "/mnt1"]
- ["/dev/sdb2", "/mnt2"]
"""
UPDATED_PARTPROBE_USERDATA = """\
#cloud-config
disk_setup:
/dev/sdb:
table_type: mbr
layout: [100]
overwrite: True
fs_setup:
- label: test3
device: /dev/sdb1
filesystem: ext4
mounts:
- ["/dev/sdb1", "/mnt3"]
"""
@pytest.mark.user_data(PARTPROBE_USERDATA)
@pytest.mark.lxd_setup.with_args(setup_and_mount_lxd_disk)
@pytest.mark.ubuntu
@pytest.mark.lxd_vm
class TestPartProbeAvailability:
"""Test disk setup works with partprobe
Disk setup can run successfully on a mounted partition when
partprobe is being used.
lp-1920939
"""
def _verify_first_disk_setup(self, client, log):
verify_clean_log(log)
lsblk = json.loads(client.execute("lsblk --json"))
sdb = [x for x in lsblk["blockdevices"] if x["name"] == "sdb"][0]
assert len(sdb["children"]) == 2
assert sdb["children"][0]["name"] == "sdb1"
assert sdb["children"][1]["name"] == "sdb2"
if "mountpoint" in sdb["children"][0]:
assert sdb["children"][0]["mountpoint"] == "/mnt1"
assert sdb["children"][1]["mountpoint"] == "/mnt2"
else:
assert sdb["children"][0]["mountpoints"] == ["/mnt1"]
assert sdb["children"][1]["mountpoints"] == ["/mnt2"]
# Not bionic because the LXD agent gets in the way of us
# changing the userdata
@pytest.mark.not_bionic
def test_disk_setup_when_mounted(
self, create_disk, client: IntegrationInstance
):
"""Test lp-1920939.
We insert an extra disk into our VM, format it to have two partitions,
modify our cloud config to mount devices before disk setup, and modify
our userdata to setup a single partition on the disk.
This allows cloud-init to attempt disk setup on a mounted partition.
When blockdev is in use, it will fail with
"blockdev: ioctl error on BLKRRPART: Device or resource busy" along
with a warning and a traceback. When partprobe is in use, everything
should work successfully.
"""
log = client.read_from_file("/var/log/cloud-init.log")
self._verify_first_disk_setup(client, log)
# Update our userdata and cloud.cfg to mount then perform new disk
# setup
client.write_to_file(
"/var/lib/cloud/seed/nocloud-net/user-data",
UPDATED_PARTPROBE_USERDATA,
)
client.execute(
"sed -i 's/write-files/write-files\\n - mounts/' "
"/etc/cloud/cloud.cfg"
)
client.execute("cloud-init clean --logs")
client.restart()
# Assert new setup works as expected
verify_clean_log(log)
lsblk = json.loads(client.execute("lsblk --json"))
sdb = [x for x in lsblk["blockdevices"] if x["name"] == "sdb"][0]
assert len(sdb["children"]) == 1
assert sdb["children"][0]["name"] == "sdb1"
if "mountpoint" in sdb["children"][0]:
assert sdb["children"][0]["mountpoint"] == "/mnt3"
else:
assert sdb["children"][0]["mountpoints"] == ["/mnt3"]
def test_disk_setup_no_partprobe(
self, create_disk, client: IntegrationInstance
):
"""Ensure disk setup still works as expected without partprobe."""
# We can't do this part in a bootcmd because the path has already
# been found by the time we get to the bootcmd
client.execute("rm $(which partprobe)")
client.execute("cloud-init clean --logs")
client.restart()
log = client.read_from_file("/var/log/cloud-init.log")
self._verify_first_disk_setup(client, log)
assert "partprobe" not in log
|
