a545da420c
Instead of restarting the dnsmasq agent for every IP we do this in bulk. That is, if a network has N updates in X seconds then we will restart the process once with the ports configured in the X seconds and not N Times. A new configuration variable have been added: - bulk_reload_interval - time to wait between bulk reloads. This is 0 by default to ensure backwards compatibility. If the value is not 0 the new functionlay is invoked. Change-Id: Ieff5ce4506fd4e7fa427eb50c50fbe316f67103f
126 lines
6.4 KiB
Python
126 lines
6.4 KiB
Python
# Copyright 2015 OpenStack Foundation
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#
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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_config import cfg
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from neutron._i18n import _
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DHCP_AGENT_OPTS = [
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cfg.IntOpt('resync_interval', default=5,
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help=_("The DHCP agent will resync its state with Neutron to "
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"recover from any transient notification or RPC errors. "
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"The interval is maximum number of seconds between "
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"attempts. The resync can be done more often based on "
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"the events triggered.")),
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cfg.IntOpt('resync_throttle', default=1,
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help=_("Throttle the number of resync state events between the "
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"local DHCP state and Neutron to only once per "
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"'resync_throttle' seconds. The value of throttle "
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"introduces a minimum interval between resync state "
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"events. Otherwise the resync may end up in a "
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"busy-loop. The value must be less than "
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"resync_interval.")),
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cfg.StrOpt('dhcp_driver',
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default='neutron.agent.linux.dhcp.Dnsmasq',
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help=_("The driver used to manage the DHCP server.")),
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cfg.BoolOpt('enable_isolated_metadata', default=False,
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help=_("The DHCP server can assist with providing metadata "
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"support on isolated networks. Setting this value to "
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"True will cause the DHCP server to append specific "
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"host routes to the DHCP request. The metadata service "
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"will only be activated when the subnet does not "
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"contain any router port. The guest instance must be "
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"configured to request host routes via DHCP (Option "
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"121). This option doesn't have any effect when "
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"force_metadata is set to True.")),
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cfg.BoolOpt('force_metadata', default=False,
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help=_("In some cases the Neutron router is not present to "
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"provide the metadata IP but the DHCP server can be "
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"used to provide this info. Setting this value will "
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"force the DHCP server to append specific host routes "
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"to the DHCP request. If this option is set, then the "
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"metadata service will be activated for all the "
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"networks.")),
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cfg.BoolOpt('enable_metadata_network', default=False,
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help=_("Allows for serving metadata requests coming from a "
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"dedicated metadata access network whose CIDR is "
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"169.254.169.254/16 (or larger prefix), and is "
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"connected to a Neutron router from which the VMs send "
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"metadata:1 request. In this case DHCP Option 121 will "
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"not be injected in VMs, as they will be able to reach "
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"169.254.169.254 through a router. This option "
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"requires enable_isolated_metadata = True.")),
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cfg.IntOpt('num_sync_threads', default=4,
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help=_('Number of threads to use during sync process. '
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'Should not exceed connection pool size configured on '
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'server.')),
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cfg.IntOpt('bulk_reload_interval', default=0, min=0,
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help=_('Time to sleep between reloading the DHCP allocations. '
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'This will only be invoked if the value is not 0. '
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'If a network has N updates in X seconds then '
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'we will reload once with the port changes in the X '
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'seconds and not N times.')),
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]
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DHCP_OPTS = [
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cfg.StrOpt('dhcp_confs',
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default='$state_path/dhcp',
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help=_('Location to store DHCP server config files.')),
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]
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DNSMASQ_OPTS = [
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cfg.StrOpt('dnsmasq_config_file',
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default='',
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help=_('Override the default dnsmasq settings '
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'with this file.')),
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cfg.ListOpt('dnsmasq_dns_servers',
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default=[],
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help=_('Comma-separated list of the DNS servers which will be '
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'used as forwarders.')),
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cfg.StrOpt('dnsmasq_base_log_dir',
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help=_("Base log dir for dnsmasq logging. "
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"The log contains DHCP and DNS log information and "
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"is useful for debugging issues with either DHCP or "
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"DNS. If this section is null, disable dnsmasq log.")),
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cfg.BoolOpt('dnsmasq_local_resolv', default=False,
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help=_("Enables the dnsmasq service to provide name "
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"resolution for instances via DNS resolvers on the "
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"host running the DHCP agent. Effectively removes the "
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"'--no-resolv' option from the dnsmasq process "
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"arguments. Adding custom DNS resolvers to the "
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"'dnsmasq_dns_servers' option disables this feature.")),
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cfg.IntOpt(
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'dnsmasq_lease_max',
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default=(2 ** 24),
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help=_('Limit number of leases to prevent a denial-of-service.')),
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cfg.BoolOpt('dhcp_broadcast_reply', default=False,
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help=_("Use broadcast in DHCP replies.")),
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cfg.IntOpt('dhcp_renewal_time', default=0,
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help=_("DHCP renewal time T1 (in seconds). If set to 0, it "
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"will default to half of the lease time.")),
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cfg.IntOpt('dhcp_rebinding_time', default=0,
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help=_("DHCP rebinding time T2 (in seconds). If set to 0, it "
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"will default to 7/8 of the lease time.")),
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]
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def register_agent_dhcp_opts(cfg=cfg.CONF):
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cfg.register_opts(DHCP_AGENT_OPTS)
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cfg.register_opts(DHCP_OPTS)
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cfg.register_opts(DNSMASQ_OPTS)
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