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check_synology.py
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check_synology.py
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#!/usr/bin/env python3
import argparse
import sys
import math
import re
import easysnmp
AUTHOR = "Frederic Werner"
VERSION = "1.0.0"
parser = argparse.ArgumentParser()
parser.add_argument("hostname", help="the hostname", type=str)
parser.add_argument("username", help="the snmp user name", type=str)
parser.add_argument("authkey", help="the auth key", type=str)
parser.add_argument("privkey", help="the priv key", type=str)
parser.add_argument("mode", help="the mode", type=str, choices=["load", "memory", "disk", "storage", "update", "status"])
parser.add_argument("-w", help="warning value for selected mode", type=int)
parser.add_argument("-c", help="critical value for selected mode", type=int)
parser.add_argument("-p", help="the snmp port", type=int, dest="port", default=161)
args = parser.parse_args()
hostname = args.hostname
port = args.port
user_name = args.username
auth_key = args.authkey
priv_key = args.privkey
mode = args.mode
warning = args.w
critical = args.c
state = 'OK'
def croak(message=None):
"""
Exit program with `UNKNOWN` state and error message.
"""
global state
state = 'UNKNOWN'
message = message and str(message) or "unknown error"
print('%s - %s' % (state, message))
exitCode()
try:
session = easysnmp.Session(
hostname=hostname,
version=3,
security_level="auth_with_privacy",
security_username=user_name,
auth_password=auth_key,
auth_protocol="MD5",
privacy_password=priv_key,
privacy_protocol="AES128")
except Exception as e:
croak(e)
def snmpget(oid):
"""
Return value from single OID.
"""
try:
res = session.get(oid)
return res.value
except Exception as e:
croak(e)
def snmpwalk(oid):
"""
Walk the given OID and return all child OIDs as a list of tuples of OID and value.
"""
res = []
try:
res = session.walk(oid)
except Exception as e:
croak(e)
return res
def exitCode():
if state == 'OK':
sys.exit(0)
if state == 'WARNING':
sys.exit(1)
if state == 'CRITICAL':
sys.exit(2)
if state == 'UNKNOWN':
sys.exit(3)
if mode == 'load':
load1 = str(float(snmpget('1.3.6.1.4.1.2021.10.1.5.1'))/100)
load5 = str(float(snmpget('1.3.6.1.4.1.2021.10.1.5.2'))/100)
load15 = str(float(snmpget('1.3.6.1.4.1.2021.10.1.5.3'))/100)
if warning and warning < int(math.ceil(float(load1))):
state = 'WARNING'
if critical and critical < int(math.ceil(float(load1))):
state = 'CRITICAL'
print(state + ' - load average: %s, %s, %s' % (load1, load5, load15), '| load1=%sc' % load1, 'load5=%sc' % load5, 'load15=%sc' % load15)
exitCode()
if mode == 'memory':
memory_total = float(snmpget('1.3.6.1.4.1.2021.4.5.0'))
memory_unused = float(snmpget('1.3.6.1.4.1.2021.4.6.0'))
memory_cached = float(snmpget('1.3.6.1.4.1.2021.4.15.0'))
memory_usable = memory_unused + memory_cached
memory_percent = 100 / memory_total * memory_usable
if warning and warning > int(memory_percent):
state = 'WARNING'
if critical and critical > int(memory_percent):
state = 'CRITICAL'
print(state + ' - {:0.1f}% '.format(memory_percent) + 'usable ({0:0.1f} MB free and {1:0.1f} MB cached out of {2:0.1f} MB)'.format((memory_unused / 1024), (memory_cached / 1024), (memory_total / 1024)), '|memory_total=%dc' % memory_total, 'memory_unused=%dc' % memory_unused, 'memory_cached=%dc' % memory_cached, 'memory_usable=%dc' % memory_usable, 'memory_percent=%d' % memory_percent + '%')
exitCode()
if mode == 'disk':
"""
Synology Disk MIB (OID: .1.3.6.1.4.1.6574.2)
OK: Status from all disks is "Normal" and no temperature threshold is raised.
WARNING: Temperature threshold for warning level is reached on any disk.
CRITICAL: Either the status from any disk is "SystemPartitionFailed" or "Crashed",
or the temperature threshold for criticality level is reached on any disk.
UNKNOWN: No disk states collected via SNMP at all.
"""
# 1. Retrieve and decode system metrics.
maxDisk = 0
states = []
output = ''
perfdata = '|'
for item in snmpwalk('1.3.6.1.4.1.6574.2.1.1.2'):
i = item.oid.split('.')[-1]
disk_name = item.value
disk_status_nr = snmpget('1.3.6.1.4.1.6574.2.1.1.5.' + str(i))
disk_temp = snmpget('1.3.6.1.4.1.6574.2.1.1.6.' + str(i))
status_translation = {
'1': "Normal",
'2': "Initialized",
'3': "NotInitialized",
'4': "SystemPartitionFailed",
'5': "Crashed"
}
disk_status = status_translation.get(disk_status_nr)
disk_name = disk_name.replace(" ", "")
# 2. Compute textual and perfdata output.
output += ' - ' + disk_name + ': Status: ' + disk_status + ', Temperature: ' + disk_temp + ' C'
perfdata += 'temperature' + disk_name + '=' + disk_temp + 'c '
# 3. Collect outcome for individual sensor state.
# When state is already "CRITICAL", it can't get worse.
if 'CRITICAL' in states:
continue
# 3.a Evaluate list of disk status flag.
if disk_status in ["Normal"]:
states.append('OK')
elif disk_status in ["SystemPartitionFailed", "Crashed"]:
states.append('CRITICAL')
# 3.b Evaluate disk temperature thresholds.
if warning and warning < int(disk_temp):
states.append('WARNING')
if critical and critical < int(disk_temp):
states.append('CRITICAL')
# 4. Compute outcome for overall sensor state.
state = 'UNKNOWN'
priorities = ['CRITICAL', 'WARNING', 'UNKNOWN', 'OK']
for priority in priorities:
if priority in states:
state = priority
break
# 5. Respond with textual and perfdata output and propagate exit code.
print('%s%s %s' % (state, output, perfdata))
exitCode()
if mode == 'storage':
output = ''
perfdata = '|'
for item in snmpwalk('1.3.6.1.2.1.25.2.3.1.3'):
i = item.oid.split('.')[-1]
storage_name = item.value
if re.match("/volume(?!.+/@docker.*)", storage_name):
allocation_units = snmpget('1.3.6.1.2.1.25.2.3.1.4.' + str(i))
size = snmpget('1.3.6.1.2.1.25.2.3.1.5.' + str(i))
used = snmpget('1.3.6.1.2.1.25.2.3.1.6.' + str(i))
storage_size = int((int(allocation_units) * int(size)) / 1000000000)
storage_used = int((int(used) * int(allocation_units)) / 1000000000)
storage_free = int(storage_size - storage_used)
storage_used_percent = int(storage_used * 100 / storage_size)
if warning and warning < int(storage_used_percent):
if state != 'CRITICAL':
state = 'WARNING'
if critical and critical < int(storage_used_percent):
state = 'CRITICAL'
output += ' - free space: ' + storage_name + ' ' + str(storage_free) + ' GB (' + str(storage_used) + ' GB of ' + str(storage_size) + ' GB used, ' + str(storage_used_percent) + '%)'
perfdata += storage_name + '=' + str(storage_used) + 'c '
print('%s%s %s' % (state, output, perfdata))
exitCode()
if mode == 'update':
update_status_nr = snmpget('1.3.6.1.4.1.6574.1.5.4.0')
update_dsm_version = snmpget('1.3.6.1.4.1.6574.1.5.3.0')
status_translation = {
'1': "Available",
'2': "Unavailable",
'3': "Connecting",
'4': "Disconnected",
'5': "Others"
}
state_translation = {
'2': 'OK',
'1': 'WARNING',
}
update_status = status_translation.get(update_status_nr)
state = state_translation.get(update_status_nr, "UNKNOWN")
print(state + ' - DSM Version: %s, DSM Update: %s' % (update_dsm_version, update_status), '| DSMupdate=%sc' % update_status_nr)
exitCode()
if mode == 'status':
# 1. Retrieve and decode system metrics.
status_model = snmpget('1.3.6.1.4.1.6574.1.5.1.0')
status_serial = snmpget('1.3.6.1.4.1.6574.1.5.2.0')
status_temperature = snmpget('1.3.6.1.4.1.6574.1.2.0')
status_system_nr = snmpget('1.3.6.1.4.1.6574.1.1.0')
status_system_fan_nr = snmpget('1.3.6.1.4.1.6574.1.4.1.0')
status_cpu_fan_nr = snmpget('1.3.6.1.4.1.6574.1.4.2.0')
status_power_nr = snmpget('1.3.6.1.4.1.6574.1.3.0')
status_translation = {
'1': "Normal",
'2': "Failed"
}
status_system = status_translation.get(status_system_nr)
status_system_fan = status_translation.get(status_system_fan_nr)
status_cpu_fan = status_translation.get(status_cpu_fan_nr)
status_power = status_translation.get(status_power_nr)
# 2. Compute outcome for overall sensor state.
# 2.a Evaluate list of system status flags.
status_all = [status_system, status_system_fan, status_cpu_fan, status_power]
if all([status == "Normal" for status in status_all]):
state = 'OK'
elif any([status == "Failed" for status in status_all]):
state = 'CRITICAL'
else:
state = 'UNKNOWN'
# 2.b Evaluate system temperature thresholds.
# When state is already "CRITICAL", it can't get worse.
if state != 'CRITICAL':
if warning and warning < int(status_temperature):
state = 'WARNING'
if critical and critical < int(status_temperature):
state = 'CRITICAL'
# 3. Respond with textual and perfdata output and propagate exit code.
print(state + ' - Model: %s, S/N: %s, System Temperature: %s C, System Status: %s, System Fan: %s, CPU Fan: %s, Powersupply : %s' % (status_model, status_serial, status_temperature, status_system, status_system_fan, status_cpu_fan, status_power) + ' | system_temp=%sc' % status_temperature)
exitCode()