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nagios_unattended_upgrades_reboot_plugin

A plugin for nagios on Ubuntu/Debian to alert when unattended_upgrades requires a reboot.

The indication that a reboot is needed is the existence of file '/var/run/reboot-required'. However, if unattended_upgrades is not installed or configured correctly this file will never be created and the server will appear as though it never needs a reboot.

Because of this, this plugin also checks that unattended_upgrades is installed and configured properly and alerts if it is not.

Installation

  • copy unattended_upgrades.py to /usr/lib/nagios/plugins/unattended_upgrades.py, owner 'root', permissions (755/rwxr-xr-x)

For a local check:

  • copy unattended_upgrades.cfg to /etc/nagios-plugins/config/unattended_upgrades.cfg, user 'root', permissions (644/rw-r--r--)
  • update your nagios host config with a new service using command_name 'check_unattended_upgrades'

Example: add the following to /etc/nagios3/conf.d/localhost_nagios2.cfg

define service{
    use                             generic-service         ; Name of service template to use
    host_name                       localhost
    service_description             Unattended Upgrades
    check_command                   check_unattended_upgrades
    }

For a remote check:

  • Add the following line to /etc/nagios/nrpe_local.cfg (or /etc/nagios/nrpe.cfg if you don't have one).

      command[check_unattended_upgrades]=/usr/lib/nagios/plugins/unattended_upgrades.py

  • update your nagios remote host config with a new service to perform 'check_unattended_upgrades' via check_nrpe.

    Example: add the following to /etc/nagios3/conf.d/[my remote host].cfg

      define service{
      use				generic-service
      host_name			[my remote host]
      service_description		Unattended Upgrades
      check_command		check_nrpe_1arg!check_unattended_upgrades
  }

Of course nrpe must be installed and configured on the remote machine. In Ubuntu this is as simple as installing package 'nagios-nrpe-server' and updating /etc/nagios/nrpe.cfg with 'allowed_hosts=127.0.0.1,[my nagios server ip]'.