openstack/ovn-bgp-agent
Code Issues Proposed changes
7e348daca0
ovn-bgp-agent/ovn_bgp_agent/config.py
Dmitrii Shcherbakov e3cb1b4a47 Make the local chassis ID configurable 
ovn-controller can be configured with a system-id override file or
-n option to use any suffix for OVSDB options. Currently ovn-bgp-agent
just uses a constant "bgp" for this and there is no way to change it.

48db2a7a35

Let's allow this suffix to be set via a config option instead.

Change-Id: Ida30b46e16ddcdc2d82af980546876f72a845c1d
2024-07-19 01:40:22 +03:00

284 lines
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Python
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# Copyright 2021 Red Hat, Inc.
#
# 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.
import shlex
from oslo_config import cfg
from oslo_log import log as logging
from oslo_privsep import priv_context
from ovn_bgp_agent import constants
LOG = logging.getLogger(__name__)
agent_opts = [
cfg.IntOpt('reconcile_interval',
help='Time (seconds) between re-sync actions.',
default=300),
cfg.IntOpt('frr_reconcile_interval',
help='Time (seconds) between re-sync actions to ensure frr '
'configuration is correct, in case frr is restart.',
default=15),
cfg.BoolOpt('expose_tenant_networks',
help='Expose VM IPs on tenant networks. '
'If this flag is enabled, it takes precedence over '
'expose_ipv6_gua_tenant_networks flag and all tenant '
'network IPs will be exposed.',
default=False),
cfg.StrOpt('advertisement_method_tenant_networks',
help='The NB driver is capable of advertising the tenant '
'networks either per host or per subnet. '
'So either per /32 or /128 or per subnet like /24. '
'Choose "host" as value for this option to advertise per '
'host or choose "subnet" to announce per subnet prefix.',
default=constants.ADVERTISEMENT_METHOD_HOST,
choices=[constants.ADVERTISEMENT_METHOD_HOST,
constants.ADVERTISEMENT_METHOD_SUBNET]),
cfg.BoolOpt('require_snat_disabled_for_tenant_networks',
help='Require SNAT on the router port to be disabled before '
'exposing the tenant networks. Otherwise the exposed '
'tenant networks will be reachable from the outside, but'
'the connections set up from within the tenant vm will '
'always be SNAT-ed by the router, thus be the router ip. '
'When SNAT is disabled, OVN will do pure routing without '
'SNAT',
default=False),
cfg.BoolOpt('expose_ipv6_gua_tenant_networks',
help='Expose only VM IPv6 IPs on tenant networks if they are '
'GUA. The expose_tenant_networks parameter takes '
'precedence over this one. So if it is set, all the '
'tenant network IPs will be exposed and not only the '
'IPv6 GUA IPs.',
default=False),
cfg.StrOpt('driver',
help='Driver to be used',
choices=('ovn_bgp_driver', 'ovn_evpn_driver',
'ovn_stretched_l2_bgp_driver', 'nb_ovn_bgp_driver'),
default='ovn_bgp_driver'),
cfg.StrOpt('ovsdb_connection',
default='unix:/usr/local/var/run/openvswitch/db.sock',
help='The connection string for the native OVSDB backend.\n'
'Use tcp:IP:PORT for TCP connection.\n'
'Use unix:FILE for unix domain socket connection.'),
cfg.IntOpt('ovsdb_connection_timeout',
default=180,
help='Timeout in seconds for the OVSDB connection transaction'),
cfg.StrOpt('bgp_AS',
default='64999',
help='AS number to be used by the Agent when running in BGP '
'mode and configuring the VRF route leaking.'),
cfg.StrOpt('bgp_router_id',
default=None,
help='Router ID to be used by the Agent when running in BGP '
'mode and configuring the VRF route leaking.'),
cfg.IPOpt('evpn_local_ip',
default=None,
help='IP address of local EVPN VXLAN (tunnel) endpoint. '
'This option can be used instead of the evpn_nic one. '
'If none specified, it will take the one from the '
'loopback device.'),
cfg.StrOpt('evpn_nic',
default=None,
help='NIC with the IP address to use for the local EVPN '
'VXLAN (tunnel) endpoint. This option can be used '
'instead of the evpn_local_ip one. If none specified, '
'it will take the one from the loopback device.'),
cfg.PortOpt('evpn_udp_dstport',
default=4789,
help='The UDP port used for EVPN VXLAN communication. By '
'default 4789 is being used.'),
cfg.BoolOpt('clear_vrf_routes_on_startup',
help='If enabled, all routes are removed from the VRF table'
'(specified by bgp_vrf_table_id option) at startup.',
default=False),
cfg.StrOpt('bgp_nic',
default='bgp-nic',
help='The name of the interface used within the VRF '
'(bgp_vrf option) to expose the IPs and/or Networks.'),
cfg.StrOpt('bgp_vrf',
default='bgp-vrf',
help='The name of the VRF to be used to expose the IPs '
'and/or Networks through BGP.'),
cfg.IntOpt('bgp_vrf_table_id',
default=10,
help='The Routing Table ID that the VRF (bgp_vrf option) '
'should use. If it does not exist, this table will be '
'created.'),
cfg.ListOpt('address_scopes',
default=None,
help='Allows to filter on the address scope. Only networks'
' with the same address scope on the provider and'
' internal interface are announced.'),
cfg.StrOpt('exposing_method',
default='underlay',
choices=('underlay', 'l2vni', 'vrf', 'dynamic', 'ovn'),
help='The exposing mechanism to be used. underlay is the '
'default and simply expose it on the default/plain '
'network.'
'With l2vni the l2 is extended over the l3 infrastructure '
'and it is exposed on a given VNI (Type-2).'
'With vrf the routes are exposed in different VRFs/VNIs '
'(Type-5).'
'With dynamic, a mix between underlay, l2vni and vrf is '
'used, depending on the information annotated on the '
'ports. '
'Finally, with ovn, instead of using kernel networking a '
'dedicated ovn cluster per node is used for the traffic '
'redirection'),
]
root_helper_opts = [
cfg.StrOpt('root_helper', default='sudo',
help=("Root helper application. "
"Use 'sudo ovn-bgp-agent-rootwrap "
"/etc/ovn-bgp-agent/rootwrap.conf' to use the real "
"root filter facility. Change to 'sudo' to skip the "
"filtering and just run the command directly.")),
cfg.BoolOpt('use_helper_for_ns_read',
default=True,
help=("Use the root helper when listing the namespaces on a "
"system. This may not be required depending on the "
"security configuration. If the root helper is "
"not required, set this to False for a performance "
"improvement.")),
# We can't just use root_helper=sudo ovn-bgp-agent-rootwrap-daemon $cfg
# because it isn't appropriate for long-lived processes spawned with
# create_process. Having a bool use_rootwrap_daemon option precludes
# specifying the rootwrap daemon command, which may be necessary for Xen?
cfg.StrOpt('root_helper_daemon',
help=("""
Root helper daemon application to use when possible.
Use 'sudo ovn-bgp-agent-rootwrap-daemon /etc/ovn-bgp-agent/rootwrap.conf'
to run rootwrap in "daemon mode" which has been reported to improve
performance at scale. For more information on running rootwrap in
"daemon mode", see:
https://docs.openstack.org/oslo.rootwrap/latest/user/usage.html#daemon-mode
""")),
]
ovn_opts = [
cfg.StrOpt('ovn_sb_private_key',
default='/etc/pki/tls/private/ovn_bgp_agent.key',
deprecated_group='DEFAULT',
help='The PEM file with private key for SSL connection to '
'OVN-SB-DB'),
cfg.StrOpt('ovn_sb_certificate',
default='/etc/pki/tls/certs/ovn_bgp_agent.crt',
deprecated_group='DEFAULT',
help='The PEM file with certificate that certifies the '
'private key specified in ovn_sb_private_key'),
cfg.StrOpt('ovn_sb_ca_cert',
default='/etc/ipa/ca.crt',
deprecated_group='DEFAULT',
help='The PEM file with CA certificate that OVN should use to'
' verify certificates presented to it by SSL peers'),
cfg.StrOpt('ovn_sb_connection',
default='',
deprecated_group='DEFAULT',
help='The connection string for the OVN_Southbound OVSDB.\n'
'Use tcp:IP:PORT for TCP connection.\n'
'Use unix:FILE for unix domain socket connection.'),
cfg.StrOpt('ovn_nb_private_key',
default='/etc/pki/tls/private/ovn_bgp_agent.key',
deprecated_group='DEFAULT',
help='The PEM file with private key for SSL connection to '
'OVN-NB-DB'),
cfg.StrOpt('ovn_nb_certificate',
default='/etc/pki/tls/certs/ovn_bgp_agent.crt',
deprecated_group='DEFAULT',
help='The PEM file with certificate that certifies the '
'private key specified in ovn_nb_private_key'),
cfg.StrOpt('ovn_nb_ca_cert',
default='/etc/ipa/ca.crt',
deprecated_group='DEFAULT',
help='The PEM file with CA certificate that OVN should use to'
' verify certificates presented to it by SSL peers'),
cfg.StrOpt('ovn_nb_connection',
default='',
deprecated_group='DEFAULT',
help='The connection string for the OVN_Northbound OVSDB.\n'
'Use tcp:IP:PORT for TCP connection.\n'
'Use unix:FILE for unix domain socket connection.'),
]
local_ovn_cluster_opts = [
cfg.StrOpt('ovn_nb_connection',
default='unix:/var/run/ovn/ovnnb_db.sock',
help='The connection string for the OVN_Northbound OVSDB.\n'
'Use tcp:IP:PORT for TCP connection.\n'
'Use unix:FILE for unix domain socket connection.'),
cfg.ListOpt('external_nics',
default=[],
help='List of NICS that the local OVN cluster needs to be '
'connected to for the external connectivity.'),
cfg.ListOpt('peer_ips',
default=[],
help='List of peer IPs used for redirecting the outgoing '
'traffic (ECMP supported).'),
cfg.ListOpt('provider_networks_pool_prefixes',
default=['192.168.0.0/16'],
help='List of prefixes for provider networks'),
cfg.ListOpt('bgp_chassis_id',
default='bgp',
help='The chassis_id used for the ovn-controller instance'
' related to the node-local OVN instance. Used as a'
' suffix for getting instance-specific options'
' from OVSDB. This option has effect only when the OVN'
' NB driver is used.'),
]
CONF = cfg.CONF
EXTRA_LOG_LEVEL_DEFAULTS = [
'oslo.privsep.daemon=INFO'
]
logging.register_options(CONF)
def register_opts():
CONF.register_opts(agent_opts)
CONF.register_opts(root_helper_opts, "agent")
CONF.register_opts(ovn_opts, "ovn")
CONF.register_opts(local_ovn_cluster_opts, "local_ovn_cluster")
def init(args, **kwargs):
CONF(args=args, project='bgp-agent', **kwargs)
def setup_logging():
logging.set_defaults(default_log_levels=logging.get_default_log_levels() +
EXTRA_LOG_LEVEL_DEFAULTS)
logging.setup(CONF, 'bgp-agent')
LOG.info("Logging enabled!")
def get_root_helper(conf):
return conf.agent.root_helper
def setup_privsep():
priv_context.init(root_helper=shlex.split(get_root_helper(cfg.CONF)))
def list_opts():
return [
("DEFAULT", agent_opts),
("agent", root_helper_opts),
("ovn", ovn_opts),
("local_ovn_cluster", local_ovn_cluster_opts),
]
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