Merge "Replace "ip monitor" command with Pyroute2 implementation"
This commit is contained in:
Zuul
Gerrit Code Review
commit
cbe8ee4c5f
@ -368,9 +368,10 @@ class HaRouter(router.RouterInfo):
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return external_process.ProcessManager(
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self.agent_conf,
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'%s.monitor' % self.router_id,
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self.ha_namespace,
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None,
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service=KEEPALIVED_STATE_CHANGE_MONITOR_SERVICE_NAME,
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default_cmd_callback=self._get_state_change_monitor_callback())
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default_cmd_callback=self._get_state_change_monitor_callback(),
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run_as_root=True)
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def _get_state_change_monitor_callback(self):
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ha_device = self.get_ha_device_name()
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@ -13,24 +13,23 @@
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# under the License.
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import os
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import signal
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import sys
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import threading
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import httplib2
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import netaddr
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from oslo_config import cfg
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from oslo_log import log as logging
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from six.moves import queue
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from neutron._i18n import _
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from neutron.agent.l3 import ha
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from neutron.agent.l3 import ha_router
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from neutron.agent.linux import daemon
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from neutron.agent.linux import ip_lib
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from neutron.agent.linux import ip_monitor
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from neutron.agent.linux import utils as agent_utils
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from neutron.common import config
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from neutron.conf.agent import common as agent_config
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from neutron.conf.agent.l3 import keepalived
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from neutron import privileged
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LOG = logging.getLogger(__name__)
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@ -55,33 +54,40 @@ class MonitorDaemon(daemon.Daemon):
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self.interface = interface
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self.cidr = cidr
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self.monitor = None
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super(MonitorDaemon, self).__init__(
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pidfile, uuid=router_id,
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user=user, group=group,
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procname=ha_router.STATE_CHANGE_PROC_NAME)
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self.event_stop = threading.Event()
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self.event_started = threading.Event()
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self.queue = queue.Queue()
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super(MonitorDaemon, self).__init__(pidfile, uuid=router_id,
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user=user, group=group)
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def run(self, run_as_root=False):
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self.monitor = ip_monitor.IPMonitor(namespace=self.namespace,
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run_as_root=run_as_root)
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self.monitor.start()
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# Only drop privileges if the process is currently running as root
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# (The run_as_root variable name here is unfortunate - It means to
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# use a root helper when the running process is NOT already running
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# as root
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if not run_as_root:
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super(MonitorDaemon, self).run()
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def run(self):
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self._thread_ip_monitor = threading.Thread(
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target=ip_lib.ip_monitor,
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args=(self.namespace, self.queue, self.event_stop,
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self.event_started))
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self._thread_read_queue = threading.Thread(
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target=self.read_queue,
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args=(self.queue, self.event_stop, self.event_started))
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self._thread_ip_monitor.start()
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self._thread_read_queue.start()
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self.handle_initial_state()
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for iterable in self.monitor:
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self.parse_and_handle_event(iterable)
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self._thread_read_queue.join()
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def parse_and_handle_event(self, iterable):
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try:
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event = ip_monitor.IPMonitorEvent.from_text(iterable)
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if event.interface == self.interface and event.cidr == self.cidr:
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new_state = 'master' if event.added else 'backup'
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def read_queue(self, _queue, event_stop, event_started):
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event_started.wait()
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while not event_stop.is_set():
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try:
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event = _queue.get(timeout=2)
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except queue.Empty:
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event = None
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if not event:
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continue
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if event['name'] == self.interface and event['cidr'] == self.cidr:
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new_state = 'master' if event['event'] == 'added' else 'backup'
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self.write_state_change(new_state)
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self.notify_agent(new_state)
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elif event.interface != self.interface and event.added:
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elif event['name'] != self.interface and event['event'] == 'added':
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# Send GARPs for all new router interfaces.
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# REVISIT(jlibosva): keepalived versions 1.2.19 and below
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# contain bug where gratuitous ARPs are not sent on receiving
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@ -90,9 +96,6 @@ class MonitorDaemon(daemon.Daemon):
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# packaged in some distributions (RHEL/CentOS/Ubuntu Xenial).
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# Remove this code once new keepalived versions are available.
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self.send_garp(event)
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except Exception:
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LOG.exception('Failed to process or handle event for line %s',
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iterable)
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def handle_initial_state(self):
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try:
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@ -133,26 +136,19 @@ class MonitorDaemon(daemon.Daemon):
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def send_garp(self, event):
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"""Send gratuitous ARP for given event."""
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ip_address = str(netaddr.IPNetwork(event['cidr']).ip)
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ip_lib.send_ip_addr_adv_notif(
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self.namespace,
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event.interface,
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str(netaddr.IPNetwork(event.cidr).ip),
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event['name'],
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ip_address,
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log_exception=False
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)
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def _kill_monitor(self):
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if self.monitor:
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# Kill PID instead of calling self.monitor.stop() because the ip
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# monitor is running as root while keepalived-state-change is not
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# (dropped privileges after launching the ip monitor) and will fail
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# with "Permission denied". Also, we can safely do this because the
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# monitor was launched with respawn_interval=None so it won't be
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# automatically respawned
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agent_utils.kill_process(self.monitor.pid, signal.SIGKILL,
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run_as_root=True)
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LOG.debug('Sent GARP to %(ip_address)s from %(device_name)s',
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{'ip_address': ip_address, 'device_name': event['name']})
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def handle_sigterm(self, signum, frame):
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self._kill_monitor()
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self.event_stop.set()
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self._thread_read_queue.join(timeout=5)
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super(MonitorDaemon, self).handle_sigterm(signum, frame)
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@ -162,7 +158,7 @@ def configure(conf):
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conf.set_override('debug', True)
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conf.set_override('use_syslog', True)
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config.setup_logging()
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agent_config.setup_privsep()
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privileged.default.set_client_mode(False)
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def main():
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@ -1,86 +0,0 @@
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# Copyright 2015 Red Hat, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_log import log as logging
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from oslo_utils import excutils
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from neutron.agent.common import async_process
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from neutron.agent.linux import ip_lib
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LOG = logging.getLogger(__name__)
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class IPMonitorEvent(object):
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def __init__(self, line, added, interface, cidr):
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self.line = line
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self.added = added
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self.interface = interface
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self.cidr = cidr
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def __str__(self):
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return self.line
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@classmethod
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def from_text(cls, line):
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route = line.split()
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try:
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first_word = route[0]
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except IndexError:
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with excutils.save_and_reraise_exception():
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LOG.error('Unable to parse route "%s"', line)
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added = (first_word != 'Deleted')
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if not added:
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route = route[1:]
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try:
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interface = ip_lib.remove_interface_suffix(route[1])
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cidr = route[3]
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except IndexError:
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with excutils.save_and_reraise_exception():
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LOG.error('Unable to parse route "%s"', line)
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return cls(line, added, interface, cidr)
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class IPMonitor(async_process.AsyncProcess):
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"""Wrapper over `ip monitor address`.
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To monitor and react indefinitely:
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m = IPMonitor(namespace='tmp', root_as_root=True)
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m.start()
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for iterable in m:
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event = IPMonitorEvent.from_text(iterable)
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print(event, event.added, event.interface, event.cidr)
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"""
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def __init__(self,
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namespace=None,
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run_as_root=True,
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respawn_interval=None):
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super(IPMonitor, self).__init__(['ip', '-o', 'monitor', 'address'],
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run_as_root=run_as_root,
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respawn_interval=respawn_interval,
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namespace=namespace)
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def __iter__(self):
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return self.iter_stdout(block=True)
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def start(self):
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super(IPMonitor, self).start(block=True)
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def stop(self):
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super(IPMonitor, self).stop(block=True)
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0
neutron/tests/functional/agent/l3/bin/__init__.py
Normal file
0
neutron/tests/functional/agent/l3/bin/__init__.py
Normal file
22
neutron/tests/functional/agent/l3/bin/cmd_keepalived_state_change.py
Executable file
22
neutron/tests/functional/agent/l3/bin/cmd_keepalived_state_change.py
Executable file
@ -0,0 +1,22 @@
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#!/usr/bin/python
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# Copyright (c) 2015 Red Hat Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import sys
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from neutron.agent.l3.keepalived_state_change import main
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if __name__ == "__main__":
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sys.exit(main())
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@ -18,13 +18,14 @@ import os
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import eventlet
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import mock
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import netaddr
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from oslo_config import fixture as fixture_config
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from oslo_utils import uuidutils
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from neutron.agent.l3 import keepalived_state_change
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from neutron.agent.l3 import ha
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from neutron.agent.l3 import ha_router
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from neutron.agent.linux import external_process
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from neutron.agent.linux import ip_lib
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from neutron.agent.linux import utils as linux_utils
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from neutron.common import utils
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from neutron.conf.agent.l3 import keepalived as kd
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from neutron.tests.common import machine_fixtures as mf
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from neutron.tests.common import net_helpers
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from neutron.tests.functional import base
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@ -37,104 +38,71 @@ def has_expected_arp_entry(device_name, namespace, ip, mac):
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return entry != []
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class TestKeepalivedStateChange(base.BaseSudoTestCase):
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def setUp(self):
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super(TestKeepalivedStateChange, self).setUp()
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self.conf_fixture = self.useFixture(fixture_config.Config())
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kd.register_l3_agent_keepalived_opts(self.conf_fixture)
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self.router_id = uuidutils.generate_uuid()
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self.conf_dir = self.get_default_temp_dir().path
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self.cidr = '169.254.128.1/24'
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self.interface_name = utils.get_rand_name()
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self.monitor = keepalived_state_change.MonitorDaemon(
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self.get_temp_file_path('monitor.pid'),
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self.router_id,
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1,
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2,
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utils.get_rand_name(),
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self.conf_dir,
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self.interface_name,
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self.cidr)
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mock.patch.object(self.monitor, 'notify_agent').start()
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self.line = '1: %s inet %s' % (self.interface_name, self.cidr)
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def test_parse_and_handle_event_wrong_device_completes_without_error(self):
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self.monitor.parse_and_handle_event(
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'1: wrong_device inet wrong_cidr')
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def _get_state(self):
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with open(os.path.join(self.monitor.conf_dir, 'state')) as state_file:
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return state_file.read()
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def test_parse_and_handle_event_writes_to_file(self):
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self.monitor.parse_and_handle_event('Deleted %s' % self.line)
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self.assertEqual('backup', self._get_state())
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self.monitor.parse_and_handle_event(self.line)
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self.assertEqual('master', self._get_state())
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def test_parse_and_handle_event_fails_writing_state(self):
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with mock.patch.object(
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self.monitor, 'write_state_change', side_effect=OSError):
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self.monitor.parse_and_handle_event(self.line)
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def test_parse_and_handle_event_fails_notifying_agent(self):
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with mock.patch.object(
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self.monitor, 'notify_agent', side_effect=Exception):
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self.monitor.parse_and_handle_event(self.line)
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def test_handle_initial_state_backup(self):
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ip = ip_lib.IPWrapper(namespace=self.monitor.namespace)
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ip.netns.add(self.monitor.namespace)
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self.addCleanup(ip.netns.delete, self.monitor.namespace)
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ip.add_dummy(self.interface_name)
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with mock.patch.object(
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self.monitor, 'write_state_change') as write_state_change,\
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mock.patch.object(
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self.monitor, 'notify_agent') as notify_agent:
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self.monitor.handle_initial_state()
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write_state_change.assert_not_called()
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notify_agent.assert_not_called()
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|
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def test_handle_initial_state_master(self):
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ip = ip_lib.IPWrapper(namespace=self.monitor.namespace)
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ip.netns.add(self.monitor.namespace)
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self.addCleanup(ip.netns.delete, self.monitor.namespace)
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ha_interface = ip.add_dummy(self.interface_name)
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ha_interface.addr.add(self.cidr)
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|
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self.monitor.handle_initial_state()
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self.assertEqual('master', self._get_state())
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|
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|
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class TestMonitorDaemon(base.BaseSudoTestCase):
|
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class TestMonitorDaemon(base.BaseLoggingTestCase):
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def setUp(self):
|
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super(TestMonitorDaemon, self).setUp()
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self.conf_dir = self.get_default_temp_dir().path
|
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self.pid_file = os.path.join(self.conf_dir, 'pid_file')
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self.log_file = os.path.join(self.conf_dir, 'log_file')
|
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self.state_file = os.path.join(self.conf_dir,
|
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'keepalived-state-change')
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self.cidr = '169.254.151.1/24'
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bridge = self.useFixture(net_helpers.OVSBridgeFixture()).bridge
|
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self.machines = self.useFixture(mf.PeerMachines(bridge))
|
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self.router, self.peer = self.machines.machines[:2]
|
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self.router_id = uuidutils.generate_uuid()
|
||||
|
||||
conf_dir = self.get_default_temp_dir().path
|
||||
monitor = keepalived_state_change.MonitorDaemon(
|
||||
self.get_temp_file_path('monitor.pid'),
|
||||
uuidutils.generate_uuid(),
|
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1,
|
||||
2,
|
||||
self.router.namespace,
|
||||
conf_dir,
|
||||
'foo-iface',
|
||||
self.machines.ip_cidr
|
||||
)
|
||||
eventlet.spawn_n(monitor.run, run_as_root=True)
|
||||
monitor_started = functools.partial(
|
||||
lambda mon: mon.monitor is not None, monitor)
|
||||
utils.wait_until_true(monitor_started)
|
||||
self.addCleanup(monitor.monitor.stop)
|
||||
self.cmd_opts = [
|
||||
ha_router.STATE_CHANGE_PROC_NAME,
|
||||
'--router_id=%s' % self.router_id,
|
||||
'--namespace=%s' % self.router.namespace,
|
||||
'--conf_dir=%s' % self.conf_dir,
|
||||
'--log-file=%s' % self.log_file,
|
||||
'--monitor_interface=%s' % self.router.port.name,
|
||||
'--monitor_cidr=%s' % self.cidr,
|
||||
'--pid_file=%s' % self.pid_file,
|
||||
'--state_path=%s' % self.conf_dir,
|
||||
'--user=%s' % os.geteuid(),
|
||||
'--group=%s' % os.getegid()
|
||||
]
|
||||
self.ext_process = external_process.ProcessManager(
|
||||
None, '%s.monitor' % self.pid_file, None, service='test_ip_mon',
|
||||
pids_path=self.conf_dir, default_cmd_callback=self._callback,
|
||||
run_as_root=True)
|
||||
|
||||
server = linux_utils.UnixDomainWSGIServer(
|
||||
'neutron-keepalived-state-change', num_threads=1)
|
||||
server.start(ha.KeepalivedStateChangeHandler(mock.Mock()),
|
||||
self.state_file, workers=0,
|
||||
backlog=ha.KEEPALIVED_STATE_CHANGE_SERVER_BACKLOG)
|
||||
self.addCleanup(server.stop)
|
||||
|
||||
def _run_monitor(self):
|
||||
self.ext_process.enable()
|
||||
self.addCleanup(self.ext_process.disable)
|
||||
eventlet.sleep(5)
|
||||
|
||||
def _callback(self, *args):
|
||||
return self.cmd_opts
|
||||
|
||||
def _search_in_file(self, file_name, text):
|
||||
def text_in_file():
|
||||
try:
|
||||
return text in open(file_name).read()
|
||||
except FileNotFoundError:
|
||||
return False
|
||||
try:
|
||||
utils.wait_until_true(text_in_file, timeout=15)
|
||||
except utils.WaitTimeout:
|
||||
# NOTE: we need to read here the content of the file.
|
||||
raise RuntimeError(
|
||||
'Text not found in file %(file_name)s: "%(text)s". File '
|
||||
'content: %(file_content)s' %
|
||||
{'file_name': file_name, 'text': text,
|
||||
'file_content': open(file_name).read()})
|
||||
|
||||
def test_new_fip_sends_garp(self):
|
||||
self._run_monitor()
|
||||
next_ip_cidr = net_helpers.increment_ip_cidr(self.machines.ip_cidr, 2)
|
||||
expected_ip = str(netaddr.IPNetwork(next_ip_cidr).ip)
|
||||
# Create incomplete ARP entry
|
||||
@ -159,6 +127,42 @@ class TestMonitorDaemon(base.BaseSudoTestCase):
|
||||
self.peer.namespace,
|
||||
expected_ip,
|
||||
self.router.port.link.address))
|
||||
utils.wait_until_true(
|
||||
has_arp_entry_predicate,
|
||||
exception=exc)
|
||||
utils.wait_until_true(has_arp_entry_predicate, timeout=15,
|
||||
exception=exc)
|
||||
|
||||
def test_read_queue_change_state(self):
|
||||
self._run_monitor()
|
||||
msg = 'Wrote router %s state %s'
|
||||
self.router.port.addr.add(self.cidr)
|
||||
self._search_in_file(self.log_file, msg % (self.router_id, 'master'))
|
||||
self.router.port.addr.delete(self.cidr)
|
||||
self._search_in_file(self.log_file, msg % (self.router_id, 'backup'))
|
||||
|
||||
def test_read_queue_send_garp(self):
|
||||
self._run_monitor()
|
||||
dev_dummy = 'dev_dummy'
|
||||
ip_wrapper = ip_lib.IPWrapper(namespace=self.router.namespace)
|
||||
ip_wrapper.add_dummy(dev_dummy)
|
||||
ip_device = ip_lib.IPDevice(dev_dummy, namespace=self.router.namespace)
|
||||
ip_device.link.set_up()
|
||||
msg = 'Sent GARP to %(ip_address)s from %(device_name)s'
|
||||
for idx in range(2, 20):
|
||||
next_cidr = net_helpers.increment_ip_cidr(self.cidr, idx)
|
||||
ip_device.addr.add(next_cidr)
|
||||
msg_args = {'ip_address': str(netaddr.IPNetwork(next_cidr).ip),
|
||||
'device_name': dev_dummy}
|
||||
self._search_in_file(self.log_file, msg % msg_args)
|
||||
ip_device.addr.delete(next_cidr)
|
||||
|
||||
def test_handle_initial_state_backup(self):
|
||||
# No tracked IP (self.cidr) is configured in the monitored interface
|
||||
# (self.router.port)
|
||||
self._run_monitor()
|
||||
msg = 'Initial status of router %s is %s' % (self.router_id, 'backup')
|
||||
self._search_in_file(self.log_file, msg)
|
||||
|
||||
def test_handle_initial_state_master(self):
|
||||
self.router.port.addr.add(self.cidr)
|
||||
self._run_monitor()
|
||||
msg = 'Initial status of router %s is %s' % (self.router_id, 'master')
|
||||
self._search_in_file(self.log_file, msg)
|
||||
|
||||
@ -1,67 +0,0 @@
|
||||
# Copyright 2015 Red Hat, Inc.
|
||||
# All Rights Reserved.
|
||||
#
|
||||
# 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.
|
||||
|
||||
from neutron.agent.common import async_process
|
||||
from neutron.agent.linux import ip_monitor
|
||||
from neutron.tests.functional.agent.linux import test_ip_lib
|
||||
|
||||
|
||||
class TestIPMonitor(test_ip_lib.IpLibTestFramework):
|
||||
def setUp(self):
|
||||
super(TestIPMonitor, self).setUp()
|
||||
attr = self.generate_device_details()
|
||||
self.device = self.manage_device(attr)
|
||||
self.monitor = ip_monitor.IPMonitor(attr.namespace)
|
||||
self.addCleanup(self._safe_stop_monitor)
|
||||
|
||||
def _safe_stop_monitor(self):
|
||||
try:
|
||||
self.monitor.stop()
|
||||
except async_process.AsyncProcessException:
|
||||
pass
|
||||
|
||||
def test_ip_monitor_lifecycle(self):
|
||||
self.assertFalse(self.monitor.is_active())
|
||||
self.monitor.start()
|
||||
self.assertTrue(self.monitor.is_active())
|
||||
self.monitor.stop()
|
||||
self.assertFalse(self.monitor.is_active())
|
||||
|
||||
def test_ip_monitor_events(self):
|
||||
self.monitor.start()
|
||||
|
||||
cidr = '169.254.128.1/24'
|
||||
self.device.addr.add(cidr)
|
||||
self._assert_event(expected_name=self.device.name,
|
||||
expected_cidr=cidr,
|
||||
expected_added=True,
|
||||
event=ip_monitor.IPMonitorEvent.from_text(
|
||||
next(self.monitor.iter_stdout(block=True))))
|
||||
|
||||
self.device.addr.delete(cidr)
|
||||
self._assert_event(expected_name=self.device.name,
|
||||
expected_cidr=cidr,
|
||||
expected_added=False,
|
||||
event=ip_monitor.IPMonitorEvent.from_text(
|
||||
next(self.monitor.iter_stdout(block=True))))
|
||||
|
||||
def _assert_event(self,
|
||||
expected_name,
|
||||
expected_cidr,
|
||||
expected_added,
|
||||
event):
|
||||
self.assertEqual(expected_name, event.interface)
|
||||
self.assertEqual(expected_added, event.added)
|
||||
self.assertEqual(expected_cidr, event.cidr)
|
||||
@ -1,36 +0,0 @@
|
||||
# Copyright 2015 Red Hat, Inc.
|
||||
# All Rights Reserved.
|
||||
#
|
||||
# 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.
|
||||
|
||||
from neutron.agent.linux import ip_monitor
|
||||
from neutron.tests import base
|
||||
|
||||
|
||||
class TestIPMonitorEvent(base.BaseTestCase):
|
||||
def test_from_text_parses_added_line(self):
|
||||
event = ip_monitor.IPMonitorEvent.from_text(
|
||||
'3: wlp3s0 inet 192.168.3.59/24 brd 192.168.3.255 '
|
||||
r'scope global dynamic wlp3s0\ valid_lft 300sec '
|
||||
'preferred_lft 300sec')
|
||||
self.assertEqual('wlp3s0', event.interface)
|
||||
self.assertTrue(event.added)
|
||||
self.assertEqual('192.168.3.59/24', event.cidr)
|
||||
|
||||
def test_from_text_parses_deleted_line(self):
|
||||
event = ip_monitor.IPMonitorEvent.from_text(
|
||||
'Deleted 1: lo inet 127.0.0.2/8 scope host secondary lo\''
|
||||
' valid_lft forever preferred_lft forever')
|
||||
self.assertEqual('lo', event.interface)
|
||||
self.assertFalse(event.added)
|
||||
self.assertEqual('127.0.0.2/8', event.cidr)
|
||||
Loading…
Reference in New Issue
Block a user