Zabbix Template to monitor available package updates from yum in hosts

Zabbix template that monitors a host for package upgrades available in RHEL / CentOS / yum package manager distros using yum check-update command

Overview

Zabbix Server version: 6.0

Agent must be running active mode, ServerActive must have a value.

Sample output of yum check-update from which we extract the info for the template:

ImageMagick6-libs.x86_64                                                            6.9.12.50-1.el7.remi                                                        remi-safe
grub2.x86_64                                                                        1:2.02-0.87.el7.9                                                           updates
gzip.x86_64                                                                         1.5-11.el7_9                                                                updates
kernel.x86_64                                                                       3.10.0-1160.66.1.el7                                                        updates
kernel-headers.x86_64                                                               3.10.0-1160.66.1.el7                                                        updates
zlib.x86_64                                                                         1.2.7-20.el7_9                                                              updates

Versions

This template was tested on:

• Zabbix Server 6.0 (LTS)
• Zabbix Agent (daemon) 5.0.21
• CentOS 7

Setup

On Zabbix frontend server:

• Download and import one of these files (only difference between files is format): server_template_check_yum_updates_template.xml, server_template_check_yum_updates_template.json, server_template_check_yum_updates_template.yml to Zabbix frontend.

• Assign the Template Yum Check-Update Monitor to the host(s) you want to monitor

On all hosts you want to monitor:

• Install packages zabbix-agent and zabbix-sender (if not installed):

  apt-get install zabbix-agent zabbix-sender

• Copy or wget agent_scripts/apt_upgrade_agent_script.sh from this repo into host folder (example): /etc/zabbix/custom_scripts

• Grant exec permissions (sudo chmod +x)

• Add entry to crontab (sudo crontab -e) to execute the script periodically, check for possible upgrades and send to Zabbix Server. This cron will run every 12 hours:

  0 */12 * * * sh /etc/zabbix/custom_scripts/yum_update_agent_script.sh