Stop metadata proxy gracefully
HAProxy supports hard stop [1] via SIGTERM signal. From the
documentation:
"""
... when the SIGTERM signal is sent to the haproxy process,
it immediately quits and all established connections are
closed.
"""
In case the process does not finish, the SIGKILL signal is sent.
The PID file created by the process is deleted.
[1]https://cbonte.github.io/haproxy-dconv/2.0/management.html#4
Closes-Bug: #1910691
Conflicts:
neutron/agent/metadata/driver.py
neutron/tests/unit/agent/dhcp/test_agent.py
neutron/tests/unit/agent/metadata/test_driver.py
Change-Id: Ifa3734e8eb4e52b1a132c3351ecc2e15463298bb
(cherry picked from commit bf14c725bb
)
This commit is contained in:
parent
28cf6786f4
commit
630fc3b4bd
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@ -16,6 +16,7 @@
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import grp
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import os
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import pwd
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import signal
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from neutron_lib.callbacks import events
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from neutron_lib.callbacks import registry
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@ -30,10 +31,13 @@ from neutron.agent.l3 import ha_router
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from neutron.agent.l3 import namespaces
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from neutron.agent.linux import external_process
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from neutron.agent.linux import utils as linux_utils
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from neutron.common import utils as common_utils
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LOG = logging.getLogger(__name__)
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SIGTERM_TIMEOUT = 5
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METADATA_SERVICE_NAME = 'metadata-proxy'
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HAPROXY_SERVICE = 'haproxy'
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@ -246,10 +250,19 @@ class MetadataDriver(object):
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monitor.unregister(uuid, METADATA_SERVICE_NAME)
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pm = cls._get_metadata_proxy_process_manager(uuid, conf,
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ns_name=ns_name)
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pm.disable()
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pm.disable(sig=str(int(signal.SIGTERM)))
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try:
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common_utils.wait_until_true(lambda: not pm.active,
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timeout=SIGTERM_TIMEOUT)
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except common_utils.WaitTimeout:
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LOG.warning('Metadata process %s did not finish after SIGTERM '
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'signal in %s seconds, sending SIGKILL signal',
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pm.pid, SIGTERM_TIMEOUT)
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pm.disable(sig=str(int(signal.SIGKILL)))
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# Delete metadata proxy config file
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# Delete metadata proxy config and PID files.
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HaproxyConfigurator.cleanup_config_file(uuid, cfg.CONF.state_path)
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linux_utils.delete_if_exists(pm.get_pid_file_name(), run_as_root=True)
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cls.monitors.pop(uuid, None)
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@ -16,6 +16,7 @@
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import collections
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import copy
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import datetime
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import signal
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import sys
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import uuid
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@ -792,7 +793,7 @@ class TestDhcpAgentEventHandler(base.BaseTestCase):
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else:
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self.external_process.assert_has_calls([
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self._process_manager_constructor_call(),
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mock.call().disable()])
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mock.call().disable(sig=str(int(signal.SIGTERM)))])
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def test_enable_dhcp_helper_enable_metadata_isolated_network(self):
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self._enable_dhcp_helper(isolated_network,
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@ -911,7 +912,7 @@ class TestDhcpAgentEventHandler(base.BaseTestCase):
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self.call_driver.assert_called_once_with('disable', fake_network)
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self.external_process.assert_has_calls([
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self._process_manager_constructor_call(),
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mock.call().disable()])
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mock.call().disable(sig=str(int(signal.SIGTERM)))])
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def test_disable_dhcp_helper_known_network_isolated_metadata(self):
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self._disable_dhcp_helper_known_network(isolated_metadata=True)
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@ -940,7 +941,7 @@ class TestDhcpAgentEventHandler(base.BaseTestCase):
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[mock.call.get_network_by_id(fake_network.id)])
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self.external_process.assert_has_calls([
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self._process_manager_constructor_call(),
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mock.call().disable()
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mock.call().disable(sig=str(int(signal.SIGTERM)))
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])
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def test_disable_dhcp_helper_driver_failure_isolated_metadata(self):
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@ -14,6 +14,7 @@
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# under the License.
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import os
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import signal
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import mock
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from neutron_lib import constants
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@ -24,6 +25,7 @@ from oslo_utils import uuidutils
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from neutron.agent.l3 import agent as l3_agent
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from neutron.agent.l3 import router_info
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from neutron.agent.linux import iptables_manager
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from neutron.agent.linux import utils as linux_utils
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from neutron.agent.metadata import driver as metadata_driver
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from neutron.conf.agent import common as agent_config
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from neutron.conf.agent.l3 import config as l3_config
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@ -35,6 +37,12 @@ from neutron.tests.unit.agent.linux import test_utils
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_uuid = uuidutils.generate_uuid
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class FakeL3NATAgent(object):
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def __init__(self):
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self.conf = cfg.CONF
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class TestMetadataDriverRules(base.BaseTestCase):
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def test_metadata_nat_rules(self):
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mock.patch('neutron.agent.l3.agent.L3PluginApi').start()
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mock.patch('neutron.agent.l3.ha.AgentMixin'
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'._init_ha_conf_path').start()
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self.delete_if_exists = mock.patch.object(linux_utils,
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'delete_if_exists')
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self.mock_get_process = mock.patch.object(
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metadata_driver.MetadataDriver,
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'_get_metadata_proxy_process_manager')
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l3_config.register_l3_agent_config_opts(l3_config.OPTS, cfg.CONF)
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ha_conf.register_l3_agent_ha_opts()
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mock.ANY, mock.ANY)
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self.assertRaises(metadata_driver.InvalidUserOrGroupException,
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config.create_config_file)
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def test_destroy_monitored_metadata_proxy(self):
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delete_if_exists = self.delete_if_exists.start()
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mproxy_process = mock.Mock(
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active=False, get_pid_file_name=mock.Mock(return_value='pid_file'))
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mock_get_process = self.mock_get_process.start()
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mock_get_process.return_value = mproxy_process
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driver = metadata_driver.MetadataDriver(FakeL3NATAgent())
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driver.destroy_monitored_metadata_proxy(mock.Mock(), 'uuid', 'conf',
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'ns_name')
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mproxy_process.disable.assert_called_once_with(
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sig=str(int(signal.SIGTERM)))
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delete_if_exists.assert_has_calls([
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mock.call('pid_file', run_as_root=True)])
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def test_destroy_monitored_metadata_proxy_force(self):
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delete_if_exists = self.delete_if_exists.start()
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mproxy_process = mock.Mock(
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active=True, get_pid_file_name=mock.Mock(return_value='pid_file'))
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mock_get_process = self.mock_get_process.start()
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mock_get_process.return_value = mproxy_process
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driver = metadata_driver.MetadataDriver(FakeL3NATAgent())
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with mock.patch.object(metadata_driver, 'SIGTERM_TIMEOUT', 0):
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driver.destroy_monitored_metadata_proxy(mock.Mock(), 'uuid',
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'conf', 'ns_name')
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mproxy_process.disable.assert_has_calls([
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mock.call(sig=str(int(signal.SIGTERM))),
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mock.call(sig=str(int(signal.SIGKILL)))])
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delete_if_exists.assert_has_calls([
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mock.call('pid_file', run_as_root=True)])
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