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[PULL 19/22] iotests: Conditionally silence certain AQMP errors
From: |
John Snow |
Subject: |
[PULL 19/22] iotests: Conditionally silence certain AQMP errors |
Date: |
Mon, 1 Nov 2021 13:30:03 -0400 |
AQMP likes to be very chatty about errors it encounters. In general,
this is good because it allows us to get good diagnostic information for
otherwise complex async failures.
For example, during a failed QMP connection attempt, we might see:
+ERROR:qemu.aqmp.qmp_client.qemub-2536319:Negotiation failed: EOFError
+ERROR:qemu.aqmp.qmp_client.qemub-2536319:Failed to establish session: EOFError
This might be nice in iotests output, because failure scenarios
involving the new QMP library will be spelled out plainly in the output
diffs.
For tests that are intentionally causing this scenario though, filtering
that log output could be a hassle. For now, add a context manager that
simply lets us toggle this output off during a critical region.
(Additionally, a forthcoming patch allows the use of either legacy or
async QMP to be toggled with an environment variable. In this
circumstance, we can't amend the iotest output to just always expect the
error message, either. Just suppress it for now. More rigorous log
filtering can be investigated later if/when it is deemed safe to
permanently replace the legacy QMP library.)
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 20211026175612.4127598-6-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
---
tests/qemu-iotests/iotests.py | 20 +++++++++++++++++++-
tests/qemu-iotests/tests/mirror-top-perms | 12 ++++++++----
2 files changed, 27 insertions(+), 5 deletions(-)
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index e5fff6ddcfc..e2f9d873ada 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -30,7 +30,7 @@
import subprocess
import sys
import time
-from typing import (Any, Callable, Dict, Iterable,
+from typing import (Any, Callable, Dict, Iterable, Iterator,
List, Optional, Sequence, TextIO, Tuple, Type, TypeVar)
import unittest
@@ -114,6 +114,24 @@
sample_img_dir = os.environ['SAMPLE_IMG_DIR']
+@contextmanager
+def change_log_level(
+ logger_name: str, level: int = logging.CRITICAL) -> Iterator[None]:
+ """
+ Utility function for temporarily changing the log level of a logger.
+
+ This can be used to silence errors that are expected or uninteresting.
+ """
+ _logger = logging.getLogger(logger_name)
+ current_level = _logger.level
+ _logger.setLevel(level)
+
+ try:
+ yield
+ finally:
+ _logger.setLevel(current_level)
+
+
def unarchive_sample_image(sample, fname):
sample_fname = os.path.join(sample_img_dir, sample + '.bz2')
with bz2.open(sample_fname) as f_in, open(fname, 'wb') as f_out:
diff --git a/tests/qemu-iotests/tests/mirror-top-perms
b/tests/qemu-iotests/tests/mirror-top-perms
index a2d5c269d7a..0a51a613f39 100755
--- a/tests/qemu-iotests/tests/mirror-top-perms
+++ b/tests/qemu-iotests/tests/mirror-top-perms
@@ -26,7 +26,7 @@ from qemu.machine import machine
from qemu.qmp import QMPConnectError
import iotests
-from iotests import qemu_img
+from iotests import change_log_level, qemu_img
image_size = 1 * 1024 * 1024
@@ -100,9 +100,13 @@ class TestMirrorTopPerms(iotests.QMPTestCase):
self.vm_b.add_blockdev(f'file,node-name=drive0,filename={source}')
self.vm_b.add_device('virtio-blk,drive=drive0,share-rw=on')
try:
- self.vm_b.launch()
- print('ERROR: VM B launched successfully, this should not have '
- 'happened')
+ # Silence AQMP errors temporarily.
+ # TODO: Remove this and just allow the errors to be logged when
+ # AQMP fully replaces QMP.
+ with change_log_level('qemu.aqmp'):
+ self.vm_b.launch()
+ print('ERROR: VM B launched successfully, '
+ 'this should not have happened')
except (QMPConnectError, ConnectError):
assert 'Is another process using the image' in self.vm_b.get_log()
--
2.31.1
- [PULL 09/22] iotests/297: update tool availability checks, (continued)
- [PULL 09/22] iotests/297: update tool availability checks, John Snow, 2021/11/01
- [PULL 10/22] iotests/297: split test into sub-cases, John Snow, 2021/11/01
- [PULL 11/22] iotests: split linters.py out from 297, John Snow, 2021/11/01
- [PULL 12/22] iotests/linters: Add entry point for linting via Python CI, John Snow, 2021/11/01
- [PULL 13/22] iotests/linters: Add workaround for mypy bug #9852, John Snow, 2021/11/01
- [PULL 14/22] python: Add iotest linters to test suite, John Snow, 2021/11/01
- [PULL 15/22] python/machine: remove has_quit argument, John Snow, 2021/11/01
- [PULL 16/22] python/machine: Handle QMP errors on close more meticulously, John Snow, 2021/11/01
- [PULL 17/22] python/aqmp: Remove scary message, John Snow, 2021/11/01
- [PULL 18/22] iotests: Accommodate async QMP Exception classes, John Snow, 2021/11/01
- [PULL 19/22] iotests: Conditionally silence certain AQMP errors,
John Snow <=
- [PULL 20/22] iotests/300: avoid abnormal shutdown race condition, John Snow, 2021/11/01
- [PULL 21/22] python/aqmp: Create sync QMP wrapper for iotests, John Snow, 2021/11/01
- [PULL 22/22] python, iotests: replace qmp with aqmp, John Snow, 2021/11/01
- Re: [PULL 00/22] Python patches, Richard Henderson, 2021/11/02