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#!/usr/bin/env python3
###############################################################################
# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems) #
# and others #
# #
# All rights reserved. This program and the accompanying materials #
# are made available under the terms of the Apache License, Version 2.0 #
# which accompanies this distribution, and is available at #
# http://www.apache.org/licenses/LICENSE-2.0 #
###############################################################################
# find status of instance network
# For each instance vNIC - take the MAC address
# For each vService in the same network as the instance,
# use local_service_id attribute in the following command in the network node:
# "ip netns exec <local_service_id> arp -n"
# look for the instance vNIC's mac_address to appear in the response
# for each mac_address:
# - if Flag 'C' = 'Complete' - mark result OK for that instance,
# - 'I' = 'Incomplete' - mark as 'warn',
# - no mac_address mark as 'error'
import sys
import subprocess
from binary_converter import binary2str
arp_headers = ['Address', 'HWtype', 'HWaddress', 'Flags', 'Mask', 'Iface']
arp_mac_pos = arp_headers.index('HWaddress')
arp_flags_pos = arp_headers.index('Flags')
def check_vnic_tuple(vnic_and_service: str):
tuple_parts = vnic_and_service.split(',')
local_service_id = tuple_parts[0]
mac_address = tuple_parts[1]
check_output = None
try:
netns_cmd = 'ip netns exec {} arp -n'.format(local_service_id)
check_output = 'MAC={}, local_service_id={}\n'\
.format(mac_address, local_service_id)
netns_out = subprocess.check_output([netns_cmd],
stderr=subprocess.STDOUT,
shell=True)
netns_out = binary2str(netns_out)
check_output += '{}\n'.format(netns_out)
netns_lines = netns_out.splitlines()
if not netns_lines or \
netns_lines[0].endswith('No such file or directory'):
check_rc = 2
else:
mac_found = False
flags = None
for l in netns_lines:
line_parts = l.split()
line_mac = line_parts[arp_mac_pos]
if len(line_parts) > arp_mac_pos and line_mac == mac_address:
mac_found = True
flags = line_parts[arp_flags_pos]
break
if mac_found:
check_rc = 1 if flags == 'I' else 0
else:
check_rc = 2
except subprocess.CalledProcessError as e:
check_output = str(e)
check_rc = 2
return check_rc, check_output
if len(sys.argv) < 2:
print('usage: ' + sys.argv[0] +
' <vService local_service_id>,<MAC>[;<>,<>]...')
exit(1)
rc = 0
output = ''
vnics = str(sys.argv[1]).split(';')
for vnic_tuple in vnics:
tuple_ret, out = check_vnic_tuple(vnic_tuple)
rc = min(rc, tuple_ret)
output += out
print(output)
exit(rc)
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