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Re: [PATCH 20/22] iotests: Add tests for invalid Quorum @replaces
From: |
Max Reitz |
Subject: |
Re: [PATCH 20/22] iotests: Add tests for invalid Quorum @replaces |
Date: |
Wed, 2 Oct 2019 14:43:28 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.0 |
On 26.09.19 16:30, Vladimir Sementsov-Ogievskiy wrote:
> 20.09.2019 18:28, Max Reitz wrote:
>> Add two tests to see that you cannot replace a Quorum child with the
>> mirror job while the child is in use by a different parent.
>>
>> Signed-off-by: Max Reitz <address@hidden>
>> ---
>> tests/qemu-iotests/041 | 57 +++++++++++++++++++++++++++++++++++++-
>> tests/qemu-iotests/041.out | 4 +--
>> 2 files changed, 58 insertions(+), 3 deletions(-)
>>
>> diff --git a/tests/qemu-iotests/041 b/tests/qemu-iotests/041
>> index 20ae9750b7..148dc47ce4 100755
>> --- a/tests/qemu-iotests/041
>> +++ b/tests/qemu-iotests/041
>> @@ -34,6 +34,8 @@ quorum_img3 = os.path.join(iotests.test_dir, 'quorum3.img')
>> quorum_repair_img = os.path.join(iotests.test_dir, 'quorum_repair.img')
>> quorum_snapshot_file = os.path.join(iotests.test_dir,
>> 'quorum_snapshot.img')
>>
>> +nbd_sock_path = os.path.join(iotests.test_dir, 'nbd.sock')
>> +
>> class TestSingleDrive(iotests.QMPTestCase):
>> image_len = 1 * 1024 * 1024 # MB
>> qmp_cmd = 'drive-mirror'
>> @@ -901,7 +903,8 @@ class TestRepairQuorum(iotests.QMPTestCase):
>>
>> def tearDown(self):
>> self.vm.shutdown()
>> - for i in self.IMAGES + [ quorum_repair_img, quorum_snapshot_file ]:
>> + for i in self.IMAGES + [ quorum_repair_img, quorum_snapshot_file,
>> + nbd_sock_path ]:
>> # Do a try/except because the test may have deleted some images
>> try:
>> os.remove(i)
>> @@ -1075,6 +1078,58 @@ class TestRepairQuorum(iotests.QMPTestCase):
>> self.assert_has_block_node("repair0", quorum_repair_img)
>> self.vm.assert_block_path('quorum0/children.1', 'repair0')
>>
>> + '''
>> + Check that we cannot replace a Quorum child when it has other
>> + parents.
>> + '''
>
> you constantly use ''', when PEP8 recommends """ for doc-strings. I can't
> complain, as our python code is something not related to PEP8 unfortunately..
I just use what I see in existing code.
(And additionally, in scripting languages I tend to just use what works.)
>> + def test_with_other_parent(self):
>
> don't we need
> if not iotests.supports_quorum():
> return
> like in neighbors?
Good point. Or a decorator, probably.
>> + result = self.vm.qmp('nbd-server-start',
>> + addr={
>> + 'type': 'unix',
>> + 'data': {'path': nbd_sock_path}
>> + })
>> + self.assert_qmp(result, 'return', {})
>> +
>> + result = self.vm.qmp('nbd-server-add', device='img1')
>> + self.assert_qmp(result, 'return', {})
>> +
>> + result = self.vm.qmp('drive-mirror', job_id='mirror',
>> device='quorum0',
>> + sync='full', node_name='repair0',
>> replaces='img1',
>> + target=quorum_repair_img,
>> format=iotests.imgfmt)
>> + self.assert_qmp(result, 'error/desc',
>> + "Cannot replace 'img1' by a node mirrored from "
>> + "'quorum0', because it cannot be guaranteed that
>> doing "
>> + "so would not lead to an abrupt change of visible
>> data")
>> +
>> + '''
>> + The same as test_with_other_parent(), but add the NBD server only
>> + when the mirror job is already running.
>> + '''
>> + def test_with_other_parents_after_mirror_start(self):
>> + result = self.vm.qmp('nbd-server-start',
>> + addr={
>> + 'type': 'unix',
>> + 'data': {'path': nbd_sock_path}
>> + })
>> + self.assert_qmp(result, 'return', {})
>> +
>> + result = self.vm.qmp('drive-mirror', job_id='mirror',
>> device='quorum0',
>> + sync='full', node_name='repair0',
>> replaces='img1',
>> + target=quorum_repair_img,
>> format=iotests.imgfmt)
>> + self.assert_qmp(result, 'return', {})
>> +
>> + result = self.vm.qmp('nbd-server-add', device='img1')
>> + self.assert_qmp(result, 'return', {})
>> +
>> + # The full error message goes to stderr, so we unfortunately
>> + # cannot check it here
>
> We can, iotests 169 and 245 do it with help of vm.get_log()
Uh, thanks, I’ll look into it.
Max
>> + self.complete_and_wait('mirror',
>> + completion_error='Operation not permitted')
>> +
>> + # Should not have been replaced
>> + self.vm.assert_block_path('quorum0/children.1', 'img1')
>> +
>> +
>> # Test mirroring with a source that does not have any parents (not even a
>> # BlockBackend)
>> class TestOrphanedSource(iotests.QMPTestCase):
>> diff --git a/tests/qemu-iotests/041.out b/tests/qemu-iotests/041.out
>> index f496be9197..ffc779b4d1 100644
>> --- a/tests/qemu-iotests/041.out
>> +++ b/tests/qemu-iotests/041.out
>> @@ -1,5 +1,5 @@
>> -...........................................................................................
>> +.............................................................................................
>> ----------------------------------------------------------------------
>> -Ran 91 tests
>> +Ran 93 tests
>>
>> OK
>>
>
> With supports_quorum checked like in neighbor test-cases (or use
> @iotests.skip_if_unsupported):
> Reviewed-by: Vladimir Sementsov-Ogievskiy <address@hidden>
>
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