Nagios plugin to monitor if the zoneminder monitors are online.

check_zm_monitors.py

#!/usr/bin/python3

# https://zoneminder.readthedocs.io/en/stable/api.html
# https://www.digitalocean.com/community/tutorials/how-to-create-nagios-plugins-with-python-on-ubuntu-12-10

import requests
import json
import sys
import argparse

parser = argparse.ArgumentParser(description='Plugin for monitoring zoneminder status monitors.')
parser.add_argument(
    '-H',
    '--IP',
    help='IP to be used in the API call. E.g. --IP=10.0.1.13',
    type=str,
    required=True,
)
parser.add_argument(
    '-u',
    '--USER',
    help='User to be used in the API call. E.g. --USER=admin',
    type=str,
    required=True,
)
parser.add_argument(
    '-p,',
    '--PASSWORD',
    help='Password to be used in the API call. E.g. --PASSWORD=Abcd1234',
    type=str,
    required=True,
)
args = parser.parse_args()

IP = args.IP
USER = args.USER
PASSWORD = args.PASSWORD

response = requests.post("http://"+str(IP)+"/zm/api/host/login.json", data = {"user": USER, "pass": PASSWORD})
access_token = response.json()['access_token']

response = requests.get("http://"+str(IP)+"/zm/api/monitors.json", params = {"token": access_token})

Monitors = len(response.json()['monitors'])

OnlineMonitors = ""
OfflineMonitors = ""
DisabledMonitors = ""

# Return codes expected by Nagios
# 0     OK
# 1     WARNING
# 2     CRITICAL
# 3     UNKNOWN
ReturnCode = 0

for monitor in response.json()['monitors']:
    if not monitor["Monitor_Status"]["Status"] and monitor["Monitor"]["Enabled"] == "1":
        OfflineMonitors += str(monitor["Monitor"]["Id"])+", "
        ReturnCode = 2
    elif not monitor["Monitor_Status"]["Status"] and monitor["Monitor"]["Enabled"] == "0":
        DisabledMonitors += str(monitor["Monitor"]["Id"])+", "
    elif monitor["Monitor_Status"]["Status"] and monitor["Monitor"]["Enabled"] == "1":
        OnlineMonitors += str(monitor["Monitor"]["Id"])+", "

OfflineMonitors = OfflineMonitors[:-2]
DisabledMonitors = DisabledMonitors[:-2]
OnlineMonitors = OnlineMonitors[:-2]

ReturnMessage = ""
if OnlineMonitors:
    ReturnMessage += "Online Monitors IDs: "+str(OnlineMonitors)+". "

if OfflineMonitors:
    ReturnMessage += "Offline Monitors IDs: "+str(OfflineMonitors)+". "

if DisabledMonitors:
    ReturnMessage += "Disabled Monitors IDs: "+str(DisabledMonitors)+". "

if ReturnCode == 0:
    ReturnMessage = "OKAY - "+ ReturnMessage
elif ReturnCode == 1:
    ReturnMessage = "WARNING - "+ ReturnMessage
elif ReturnCode == 2:
    ReturnMessage = "CRITICAL - "+ ReturnMessage
elif ReturnCode == 3:
    ReturnMessage = "UKNOWN - "+ ReturnMessage

#print(json.dumps(response.json(), indent=4, sort_keys=True))
print(ReturnMessage)
sys.exit(ReturnCode)