Zabbix custom scripts

If you want to monitor custom parameters on Zabbix, you can write a script to monitor and share the parameter to the Zabbix server.

Below is an example, where we are creating a custom python script to report service status in linux.

Create a folder on our host 

#mkdir /home/zabbix

#cd /home/zabbix

And create a new Python file

# cat service_discovery.py

#!/usr/bin/python

import sys

import os

import json

SERVICES = os.popen('systemctl list-unit-files').read()

ILLEGAL_CHARS = ["\\", "'", "\"", "`", "*", "?", "[", "]", "{", "}", "~", "$", "!", "&", ";", "(", ")", "<", ">", "|", "#", "@", "0x0a"]

DISCOVERY_LIST = {"data": []}

LINES = SERVICES.splitlines()

for l in LINES:

    service_unit = l.split(".service")

    if len(service_unit) == 2:

        if not [ele for ele in ILLEGAL_CHARS if(ele in service_unit[0])]:

            status = service_unit[1].split()

            if len(status) == 1:

                if (status[0] == "enabled" or status[0] == "generated"):

                    DISCOVERY_LIST["data"].append({"{#SERVICE}": service_unit[0]})

            else:

                if (status[0] == "enabled" or status[0] == "generated") and status[1] == "enabled":

                    DISCOVERY_LIST["data"].append({"{#SERVICE}": service_unit[0]})

JSON = json.dumps(DISCOVERY_LIST)

print(JSON)

Need to give execute permissions

#sudo chmod a+x service_discovery.py

we can the test it works from the Zabbix users perspective by running

#sudo -H -u zabbix bash -c '/home/zabbix/service_discovery.py'

Create a UserParameter in the Zabbix agent conf.

Scroll down to the UserParameters section and add these new UserParameters

UserParameter=service.discovery,/home/zabbix/service_discovery.py

UserParameter=service.isactive[*],systemctl is-active --quiet '$1' && echo 1 || echo 0

UserParameter=service.activatedtime[*],systemctl show '$1' --property=ActiveEnterTimestampMonotonic | cut -d= -f2

Restart Zabbix Agent and check status

#sudo service zabbix-agent restart

#sudo service zabbix-agent status

Test the service.discovery UserParameter using

# zabbix_agentd -t service.discovery

service.discovery                             [t|{"data": [{"{#SERVICE}": "auditd"}, {"{#SERVICE}": "chronyd"}, {"{#SERVICE}": "cloud-config"}, {"{#SERVICE}": "cloud-final"}, {"{#SERVICE}": "cloud-init-local"}, {"{#SERVICE}": "cloud-init"}, {"{#SERVICE}": "crond"}, {"{#SERVICE}": "dbus-org.fedoraproject.FirewallD1"}, {"{#SERVICE}": "firewalld"}, {"{#SERVICE}": "ipmi"}, {"{#SERVICE}": "irqbalance"}, {"{#SERVICE}": "kdump"}, {"{#SERVICE}": "microcode"}, {"{#SERVICE}": "mysqld"}, {"{#SERVICE}": "postfix"}, {"{#SERVICE}": "qemu-guest-agent"}, {"{#SERVICE}": "rhel-autorelabel-mark"}, {"{#SERVICE}": "rhel-autorelabel"}, {"{#SERVICE}": "rhel-configure"}, {"{#SERVICE}": "rhel-dmesg"}, {"{#SERVICE}": "rhel-domainname"}, {"{#SERVICE}": "rhel-import-state"}, {"{#SERVICE}": "rhel-loadmodules"}, {"{#SERVICE}": "rhel-readonly"}, {"{#SERVICE}": "rpcbind"}, {"{#SERVICE}": "rsyslog"}, {"{#SERVICE}": "sshd"}, {"{#SERVICE}": "systemd-readahead-collect"}, {"{#SERVICE}": "systemd-readahead-drop"}, {"{#SERVICE}": "systemd-readahead-replay"}, {"{#SERVICE}": "tuned"}, {"{#SERVICE}": "zabbix-agent"}, {"{#SERVICE}": "zabbix-server"}]}]

The response should resemble this below, but containing the various available services depending on your host.

Relevant Blogs:

Zabbix Configure Alerts 

Ansible Playbook 

Docker volumes  

Architecture of Kubernetes