fix: disable route check for po cleanup test cases (sonic-net#21320)

Author: cyw233

tests/common/fixtures/duthost_utils.py

@@ -93,6 +93,14 @@ def backup_and_restore_config_db_session(duthosts):
         yield func
 
 
+def stop_route_checker_on_duthost(duthost):
+    duthost.command("sudo monit stop routeCheck", module_ignore_errors=True)
+
+
+def start_route_checker_on_duthost(duthost):
+    duthost.command("sudo monit start routeCheck", module_ignore_errors=True)
+
+
 def _disable_route_checker(duthost):
     """
         Some test cases will add static routes for test, which may trigger route_checker
@@ -102,9 +110,9 @@ def _disable_route_checker(duthost):
         Args:
             duthost: DUT fixture
     """
-    duthost.command('monit stop routeCheck', module_ignore_errors=True)
+    stop_route_checker_on_duthost(duthost)
     yield
-    duthost.command('monit start routeCheck', module_ignore_errors=True)
+    start_route_checker_on_duthost(duthost)
 
 
 @pytest.fixture

tests/conftest.py

@@ -30,7 +30,8 @@
 from tests.common.devices.vmhost import VMHost
 from tests.common.devices.base import NeighborDevice
 from tests.common.devices.cisco import CiscoHost
-from tests.common.fixtures.duthost_utils import backup_and_restore_config_db_session        # noqa: F401
+from tests.common.fixtures.duthost_utils import backup_and_restore_config_db_session, \
+    stop_route_checker_on_duthost, start_route_checker_on_duthost                           # noqa: F401
 from tests.common.fixtures.ptfhost_utils import ptf_portmap_file                            # noqa: F401
 from tests.common.fixtures.ptfhost_utils import ptf_test_port_map_active_active             # noqa: F401
 from tests.common.fixtures.ptfhost_utils import run_icmp_responder_session                  # noqa: F401
@@ -2899,7 +2900,7 @@ def run_route_check():
 
             with SafeThreadPoolExecutor(max_workers=8) as executor:
                 for duthost in duthosts.frontend_nodes:
-                    executor.submit(duthost.shell, "sudo monit stop routeCheck")
+                    executor.submit(stop_route_checker_on_duthost, duthost)
 
             yield
 
@@ -2909,7 +2910,7 @@ def run_route_check():
         finally:
             with SafeThreadPoolExecutor(max_workers=8) as executor:
                 for duthost in duthosts.frontend_nodes:
-                    executor.submit(duthost.shell, "sudo monit start routeCheck")
+                    executor.submit(start_route_checker_on_duthost, duthost)
     else:
         logger.info("Skipping temporarily_disable_route_check fixture")
         yield

tests/pc/test_po_cleanup.py

@@ -1,5 +1,7 @@
 import pytest
 import logging
+
+from tests.common.fixtures.duthost_utils import stop_route_checker_on_duthost
 from tests.common.utilities import wait_until
 from tests.common import config_reload
 from tests.common.plugins.loganalyzer.loganalyzer import LogAnalyzer
@@ -37,6 +39,15 @@ def ignore_expected_loganalyzer_exceptions(enum_rand_one_per_hwsku_frontend_host
         loganalyzer[enum_rand_one_per_hwsku_frontend_hostname].expect_regex.extend(expectRegex)
 
 
+@pytest.fixture(autouse=True)
+def disable_route_check_for_duthost(duthosts, enum_rand_one_per_hwsku_frontend_hostname):
+    duthost = duthosts[enum_rand_one_per_hwsku_frontend_hostname]
+    logging.info("Stopping route check on DUT {}".format(duthost.hostname))
+    stop_route_checker_on_duthost(duthost)
+
+    yield
+
+
 def check_kernel_po_interface_cleaned(duthost, asic_index):
     namespace = duthost.get_namespace_from_asic_id(asic_index)
     res = duthost.shell(duthost.get_linux_ip_cmd_for_namespace("ip link show | grep -c PortChannel", namespace),