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#!/usr/bin/env python3
#
# Copyright VyOS maintainers and contributors <maintainers@vyos.io>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from vyos import ConfigError
from vyos.config import Config
from vyos.vpp.utils import cli_ifaces_list
from vyos.vpp.sflow import SFlow
from vyos.vpp.config_verify import verify_vpp_interface_not_a_member
def get_config(config=None) -> dict:
if config:
conf = config
else:
conf = Config()
base = ['vpp', 'sflow']
# Get config_dict with default values
config = conf.get_config_dict(
base,
key_mangling=('-', '_'),
get_first_key=True,
no_tag_node_value_mangle=True,
with_defaults=True,
with_recursive_defaults=True,
)
# Get effective config as we need full dictionary for deletion
effective_config = conf.get_config_dict(
base,
key_mangling=('-', '_'),
effective=True,
get_first_key=True,
no_tag_node_value_mangle=True,
)
# Get system sflow configuration to check for server
system_sflow = conf.get_config_dict(
['system', 'sflow'],
key_mangling=('-', '_'),
get_first_key=True,
no_tag_node_value_mangle=True,
with_recursive_defaults=True,
)
if system_sflow:
config['system_sflow'] = system_sflow
if effective_config:
config.update({'effective': effective_config})
if not conf.exists(base):
config['remove'] = True
return config
# Add list of VPP interfaces to the config
config.update({'vpp_ifaces': cli_ifaces_list(conf)})
# VPP interface membership data for member-conflict checks
config['interfaces_vpp'] = conf.get_config_dict(
['interfaces', 'vpp'],
key_mangling=('-', '_'),
get_first_key=True,
no_tag_node_value_mangle=True,
)
return config
def verify(config):
if 'remove' in config:
return None
# Check if interface section exists
if 'interface' not in config:
raise ConfigError('Interfaces must be configured for sFlow')
# Verify that all interfaces specified exist in VPP
for interface in config['interface']:
if interface not in config['vpp_ifaces']:
raise ConfigError(
f'{interface} must be a VPP interface for sFlow monitoring'
)
verify_vpp_interface_not_a_member(interface, config)
# Verify that system sflow has enable-vpp defined
if 'system_sflow' not in config or 'vpp' not in config.get('system_sflow', {}):
raise ConfigError(
'"sflow vpp" must be defined under system sflow configuration'
)
def generate(config):
# No templates to render for sFlow
pass
def apply(config):
s = SFlow()
# Disable sFlow on deleted interface
for interface in config.get('effective', {}).get('interface', []):
if interface not in config.get('interface', []):
s.disable_sflow(interface)
if 'remove' in config:
return None
# Configure sample rate
if 'sampling_rate' in config.get('system_sflow', {}):
s.set_sampling_rate(int(config['system_sflow']['sampling_rate']))
# Configure polling interval
if 'polling' in config.get('system_sflow', {}):
s.set_polling_interval(int(config['system_sflow']['polling']))
# Configure header bytes
if 'header_bytes' in config:
s.set_header_bytes(int(config['header_bytes']))
# Configure interfaces
for interface in config.get('interface', []):
s.enable_sflow(interface)
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
