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vrrp.py
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vrrp.py
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#!/usr/bin/env python3
#
# Copyright (C) 2018 VyOS maintainers and contributors
#
# 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/>.
#
import sys
import time
import argparse
import json
import tabulate
import vyos.keepalived
import vyos.util
config_dict_path = '/run/keepalived_config.dict'
# get disabled instances from a config
def vrrp_get_disabled():
# read the dictionary file with configuration
with open(config_dict_path, 'r') as dict_file:
vrrp_config_dict = json.load(dict_file)
vrrp_disabled = []
# add disabled groups to the list
for vrrp_group in vrrp_config_dict['vrrp_groups']:
if vrrp_group['disable']:
vrrp_disabled.append([vrrp_group['name'], vrrp_group['interface'], vrrp_group['vrid'], 'DISABLED', ''])
# return list with disabled instances
return vrrp_disabled
def print_summary():
try:
vyos.keepalived.force_json_dump()
# Wait for keepalived to produce the data
# Replace with inotify or similar if it proves problematic
time.sleep(0.2)
json_data = vyos.keepalived.get_json_data()
vyos.keepalived.remove_vrrp_data("json")
except:
print("VRRP information is not available")
sys.exit(1)
groups = []
for group in json_data:
data = group["data"]
name = data["iname"]
ltrans_timestamp = float(data["last_transition"])
ltrans_time = vyos.util.seconds_to_human(int(time.time() - ltrans_timestamp))
interface = data["ifp_ifname"]
vrid = data["vrid"]
state = vyos.keepalived.decode_state(data["state"])
row = [name, interface, vrid, state, ltrans_time]
groups.append(row)
# add to the active list disabled instances
groups.extend(vrrp_get_disabled())
headers = ["Name", "Interface", "VRID", "State", "Last Transition"]
output = tabulate.tabulate(groups, headers)
print(output)
def print_statistics():
try:
vyos.keepalived.force_stats_dump()
time.sleep(0.2)
output = vyos.keepalived.get_statistics()
print(output)
vyos.keepalived.remove_vrrp_data("stats")
except:
print("VRRP statistics are not available")
sys.exit(1)
def print_state_data():
try:
vyos.keepalived.force_state_data_dump()
time.sleep(0.2)
output = vyos.keepalived.get_state_data()
print(output)
vyos.keepalived.remove_vrrp_data("state")
except:
print("VRRP information is not available")
sys.exit(1)
parser = argparse.ArgumentParser()
group = parser.add_mutually_exclusive_group()
group.add_argument("-s", "--summary", action="store_true", help="Print VRRP summary")
group.add_argument("-t", "--statistics", action="store_true", help="Print VRRP statistics")
group.add_argument("-d", "--data", action="store_true", help="Print detailed VRRP data")
args = parser.parse_args()
# Exit early if VRRP is dead or not configured
if not vyos.keepalived.vrrp_running():
print("VRRP is not running")
sys.exit(0)
if args.summary:
print_summary()
elif args.statistics:
print_statistics()
elif args.data:
print_state_data()
else:
parser.print_help()
sys.exit(1)

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