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check_cisco_stackmodules.py
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check_cisco_stackmodules.py
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#!/usr/bin/env python3
"""
###############################################################################
# check_cisco_stackmodules.py
# Nagios plugin/script that checks the status of all stack modules of a Cisco
# Switch/Router via SNMPv3 using the CISCO-STACKWISE-MIB
#
#
# Author : Mauno Erhardt <[email protected]>
# Copyright : (c) 2021 Burkert Fluid Control Systems
# Source : https://github.com/m-erhardt/check-cisco-plugins
# License : GPLv3 (http://www.gnu.org/licenses/gpl-3.0.txt)
#
###############################################################################
"""
import sys
from argparse import ArgumentParser
from pysnmp.hlapi import bulkCmd, SnmpEngine, UsmUserData, \
UdpTransportTarget, \
ObjectType, ObjectIdentity, \
ContextData, usmHMACMD5AuthProtocol, \
usmHMACSHAAuthProtocol, \
usmHMAC128SHA224AuthProtocol, \
usmHMAC192SHA256AuthProtocol, \
usmHMAC256SHA384AuthProtocol, \
usmHMAC384SHA512AuthProtocol, usmDESPrivProtocol, \
usm3DESEDEPrivProtocol, usmAesCfb128Protocol, \
usmAesCfb192Protocol, usmAesCfb256Protocol
authprot = {
"MD5": usmHMACMD5AuthProtocol,
"SHA": usmHMACSHAAuthProtocol,
"SHA224": usmHMAC128SHA224AuthProtocol,
"SHA256": usmHMAC192SHA256AuthProtocol,
"SHA384": usmHMAC256SHA384AuthProtocol,
"SHA512": usmHMAC384SHA512AuthProtocol,
}
privprot = {
"DES": usmDESPrivProtocol,
"3DES": usm3DESEDEPrivProtocol,
"AES": usmAesCfb128Protocol,
"AES192": usmAesCfb192Protocol,
"AES256": usmAesCfb256Protocol,
}
cswSwitchState = {
"1": "waiting",
"2": "progressing",
"3": "added",
"4": "ready",
"5": "sdmMismatch",
"6": "verMismatch",
"7": "featureMismatch",
"8": "newMasterInit",
"9": "provisioned",
"10": "invalid",
"11": "removed"
}
cswStackPortOperStatus = {
"1": "up",
"2": "down",
"3": "forcedDown"
}
def get_args():
""" Parse Arguments """
parser = ArgumentParser(
description="Cisco stack module check plugin",
epilog=""
)
parser.add_argument("--host", required=True, help="hostname or IP address",
type=str, dest='host')
parser.add_argument("--port", required=False, help="SNMP port", type=int,
dest='port', default=161)
parser.add_argument("--timeout", required=False, help="SNMP timeout",
type=int, dest='timeout', default=10)
parser.add_argument("--user", required=True, help="SNMPv3 user name",
type=str, dest='user')
parser.add_argument("-l", "--seclevel", required=False,
help="SNMPv3 security level", type=str,
dest="v3mode",
choices=["authPriv", "authNoPriv"], default="authPriv")
parser.add_argument("--authkey", required=True, help="SNMPv3 auth key",
type=str, dest='authkey')
parser.add_argument("--privkey", required=True, help="SNMPv3 priv key",
type=str, dest='privkey')
parser.add_argument("--authmode", required=False, help="SNMPv3 auth mode",
type=str, dest='authmode',
default='SHA',
choices=['MD5', 'SHA', 'SHA224', 'SHA256', 'SHA384',
'SHA512'])
parser.add_argument("--privmode", required=False,
help="SNMPv3 privacy mode", type=str, dest='privmode',
default='AES',
choices=['DES', '3DES', 'AES', 'AES192', 'AES256'])
args = parser.parse_args()
return args
def get_snmp_table(table_oid, args):
""" get SNMP table """
# initialize empty list for return object
table = []
if args.v3mode == "authPriv":
iterator = bulkCmd(
SnmpEngine(),
UsmUserData(args.user, args.authkey, args.privkey,
authProtocol=authprot[args.authmode],
privProtocol=privprot[args.privmode]),
UdpTransportTarget((args.host, args.port), timeout=args.timeout),
ContextData(),
0, 20,
ObjectType(ObjectIdentity(table_oid)),
lexicographicMode=False,
lookupMib=False
)
elif args.v3mode == "authNoPriv":
iterator = bulkCmd(
SnmpEngine(),
UsmUserData(args.user, args.authkey,
authProtocol=authprot[args.authmode]),
UdpTransportTarget((args.host, args.port), timeout=args.timeout),
ContextData(),
0, 20,
ObjectType(ObjectIdentity(table_oid)),
lexicographicMode=False,
lookupMib=False
)
for error_indication, error_status, error_index, var_binds in iterator:
if error_indication:
exit_plugin("3", ''.join(['SNMP error: ', str(error_indication)]), "")
elif error_status:
print(f"{error_status.prettyPrint()} at "
f"{error_index and var_binds[int(error_index) - 1][0] or '?'}")
else:
# split OID and value into two fields and append to return element
table.append([str(var_binds[0][0]), str(var_binds[0][1])])
# return list with all OIDs/values from snmp table
return table
def exit_plugin(returncode, output, perfdata):
""" Check status and exit accordingly """
if returncode == "3":
print("UNKNOWN - " + str(output))
sys.exit(3)
if returncode == "2":
if perfdata == "":
print(f"CRITICAL - {output}")
else:
print(f"CRITICAL - {output} | {perfdata}")
sys.exit(2)
if returncode == "1":
if perfdata == "":
print(f"WARNING - {output}")
else:
print(f"WARNING - {output} | {perfdata}")
sys.exit(1)
elif returncode == "0":
if perfdata == "":
print(f"OK - {output}")
else:
print(f"OK - {output} | {perfdata}")
sys.exit(0)
def main():
""" Main program code """
# Get Arguments
args = get_args()
# Get switch module state (CISCO-STACKWISE-MIB::cswSwitchState)
module_state_table = get_snmp_table('1.3.6.1.4.1.9.9.500.1.2.1.1.6', args)
# Get switch stack port state (CISCO-STACKWISE-MIB::cswStackPortOperStatus)
port_state_table = get_snmp_table('1.3.6.1.4.1.9.9.500.1.2.2.1.1', args)
# Summarize state of all stack modules
module_states = []
for entry in module_state_table:
module_states.append(entry[1].strip())
# Summarize state of all stack ports
port_states = []
for entry in port_state_table:
port_states.append(entry[1].strip())
# Replace status code with status strings
# for i in range(len(module_states)):
for i, _ in enumerate(module_states):
module_states[i] = cswSwitchState[module_states[i]]
for i, _ in enumerate(port_states):
port_states[i] = cswStackPortOperStatus[port_states[i]]
# Initialize return state ("0" = "OK")
retstate = "0"
# check if any modules are not in state "ready"
for i, _ in enumerate(module_states):
if module_states[i] != "ready":
retstate = "2"
# check if any stack ports are not in state "up"
for i, _ in enumerate(port_states):
if port_states[i] != "up":
retstate = "2"
if retstate == "2":
output = ''.join(['Switch states: \"',
str(",".join(module_states)),
'\", Stack port states: \"',
str(",".join(port_states)), '\"'])
exit_plugin("2", output, "")
elif retstate == "0":
output = ''.join([str(len(module_states)),
" switches are \"ready\" and ", str(len(port_states)),
" stack ports are \"up\""])
exit_plugin("0", output, "")
if __name__ == "__main__":
main()