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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import json
import os
import subprocess
from unittest import mock
import fixtures
import testtools
from os_collect_config import config_drive
from os_collect_config.tests import test_ec2
BLKID_CONFIG_DRIVE = '''DEVNAME=/dev/sr0
UUID=2016-09-12-02-14-09-00
LABEL=config-2
TYPE=iso9660'''
BLKID_RESPONSE = BLKID_CONFIG_DRIVE + '''
DEVNAME=/dev/block/253:1
UUID=f13d84b4-c756-4d89-9d5e-6b534397aa14
TYPE=xfs
'''
class TestConfigDrive(testtools.TestCase):
def setUp(self):
super().setUp()
self.log = self.useFixture(fixtures.FakeLogger())
@mock.patch.object(subprocess, 'check_output')
def test_all_devices(self, co):
co.return_value = BLKID_RESPONSE
bds = list(config_drive.all_block_devices())
self.assertEqual(2, len(bds))
self.assertEqual('/dev/sr0', bds[0].devname)
self.assertEqual('iso9660', bds[0].type)
self.assertEqual('config-2', bds[0].label)
self.assertTrue(bds[0].config_drive_candidate())
self.assertEqual('/dev/sr0: TYPE="iso9660" LABEL="config-2"',
str(bds[0]))
self.assertEqual('/dev/block/253:1', bds[1].devname)
self.assertEqual('xfs', bds[1].type)
self.assertIsNone(bds[1].label)
self.assertFalse(bds[1].config_drive_candidate())
self.assertEqual('/dev/block/253:1: TYPE="xfs" LABEL="None"',
str(bds[1]))
@mock.patch.object(subprocess, 'check_output')
def test_config_drive(self, co):
co.return_value = BLKID_RESPONSE
bd = config_drive.config_drive()
self.assertTrue(bd.config_drive_candidate())
self.assertEqual('/dev/sr0: TYPE="iso9660" LABEL="config-2"',
str(bd))
def test_parse_shell_var(self):
psv = config_drive.BlockDevice.parse_shell_var
self.assertEqual(('foo', 'bar'), psv('foo=bar'))
self.assertEqual(('foo', 'bar=baz'), psv('foo=bar=baz'))
self.assertEqual(('foo', 'bar baz'), psv('foo=bar baz'))
self.assertEqual(('foo', 'bar baz'), psv(r'foo=bar\ baz'))
self.assertEqual(('foo', ''), psv('foo='))
self.assertEqual((None, None), psv('foo'))
self.assertEqual((None, None), psv(None))
@mock.patch.object(subprocess, 'check_output')
def test_ensure_mounted(self, co):
bd = config_drive.BlockDevice.from_blkid_export(BLKID_CONFIG_DRIVE)
self.assertTrue(bd.config_drive_candidate())
proc = self.useFixture(fixtures.TempDir())
config_drive.PROC_MOUNTS_PATH = os.path.join(proc.path, 'mount')
with open(config_drive.PROC_MOUNTS_PATH, 'w') as md:
md.write('')
self.assertIsNone(bd.mountpoint)
self.assertFalse(bd.unmount)
bd.ensure_mounted()
mountpoint = bd.mountpoint
self.assertIsNotNone(mountpoint)
self.assertTrue(bd.unmount)
self.assertTrue(os.path.isdir(mountpoint))
co.assert_called_with([
'mount', '/dev/sr0', mountpoint, '-o', 'ro'
])
bd.cleanup()
self.assertIsNone(bd.mountpoint)
self.assertFalse(bd.unmount)
self.assertFalse(os.path.isdir(mountpoint))
co.assert_called_with([
'umount', '-l', mountpoint
])
@mock.patch.object(subprocess, 'check_output')
def test_already_mounted(self, co):
bd = config_drive.BlockDevice.from_blkid_export(BLKID_CONFIG_DRIVE)
self.assertTrue(bd.config_drive_candidate())
proc = self.useFixture(fixtures.TempDir())
mountpoint = self.useFixture(fixtures.TempDir()).path
config_drive.PROC_MOUNTS_PATH = os.path.join(proc.path, 'mount')
with open(config_drive.PROC_MOUNTS_PATH, 'w') as md:
md.write('{} {} r 0 0\n'.format(bd.devname, mountpoint))
self.assertIsNone(bd.mountpoint)
self.assertFalse(bd.unmount)
bd.ensure_mounted()
self.assertEqual(mountpoint, bd.mountpoint)
self.assertFalse(bd.unmount)
co.assert_not_called()
bd.cleanup()
self.assertIsNone(bd.mountpoint)
self.assertFalse(bd.unmount)
co.assert_not_called()
@mock.patch.object(config_drive.BlockDevice, 'ensure_mounted')
@mock.patch.object(config_drive.BlockDevice, 'cleanup')
def test_get_metadata(self, cleanup, ensure_mounted):
bd = config_drive.BlockDevice.from_blkid_export(BLKID_CONFIG_DRIVE)
bd.mountpoint = self.useFixture(fixtures.TempDir()).path
md = bd.get_metadata()
self.assertEqual({}, md)
md_dir = os.path.join(bd.mountpoint, 'ec2', 'latest')
os.makedirs(md_dir)
md_path = os.path.join(md_dir, 'meta-data.json')
with open(md_path, 'w') as md:
json.dump(test_ec2.META_DATA_RESOLVED, md)
md = bd.get_metadata()
self.assertEqual(test_ec2.META_DATA_RESOLVED, md)
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