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"""
Test that disk setup can run successfully on a mounted partition when
partprobe is being used.
lp-1920939
"""
import json
import os
import pytest
from uuid import uuid4
from pycloudlib.lxd.instance import LXDInstance
from cloudinit.subp import subp
from tests.integration_tests.instances import IntegrationInstance
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.yield_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)
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_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"]
"""
def _verify_first_disk_setup(client, log):
assert 'Traceback' not in log
assert 'WARN' not in 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'][0]['mountpoint'] == '/mnt1'
assert sdb['children'][1]['name'] == 'sdb2'
assert sdb['children'][1]['mountpoint'] == '/mnt2'
@pytest.mark.user_data(USERDATA)
@pytest.mark.lxd_setup.with_args(setup_and_mount_lxd_disk)
@pytest.mark.ubuntu
@pytest.mark.lxd_vm
# Not bionic or xenial because the LXD agent gets in the way of us
# changing the userdata
@pytest.mark.not_bionic
@pytest.mark.not_xenial
def test_disk_setup_when_mounted(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')
_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_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
assert 'Traceback' not in log
assert 'WARN' not in 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'
assert sdb['children'][0]['mountpoint'] == '/mnt3'
@pytest.mark.user_data(USERDATA)
@pytest.mark.lxd_setup.with_args(setup_and_mount_lxd_disk)
@pytest.mark.ubuntu
@pytest.mark.lxd_vm
def test_disk_setup_no_partprobe(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')
_verify_first_disk_setup(client, log)
assert 'partprobe' not in log
|
