Improperly fails (reports OK) on RHEL Systems with Unassigned Subscriptions

[mfrazier]

When running the Nagios Yum Check Plugin on RHEL systems registered with an entitlement server but without assigned subscriptions, it becomes impossible to check for potential updates. Despite this, yum/dnf will still exit with a status of 0. This issue can occasionally arise when Red Hat representatives misassign or erroneously move subscriptions within an organization.

I have addressed this issue by making a simple change to your check_returncode function and believe that others may benefit from this solution as well. Thank you for your work on this plugin; it has been incredibly useful.

Nagios Plugin for Yum updates on RedHat/CentOS systems - Version 0.12.7
Author: Hari Sekhon

setting plugin timeout to 30 seconds
running command: /usr/bin/yum --security check-update
Returncode: '0'
Output: 'Updating Subscription Management repositories.

This system is registered with an entitlement server, but is not receiving updates. You can use subscription-manager to assign subscriptions.

Last metadata expiration check: 1:48:44 ago on Mon 08 Jul 2024 04:39:59 PM UTC.
'
running command: yum updateinfo
Returncode: '0'
Output: 'Updating Subscription Management repositories.

This system is registered with an entitlement server, but is not receiving updates. You can use subscription-manager to assign subscriptions.

Last metadata expiration check: 1:48:45 ago on Mon 08 Jul 2024 04:39:59 PM UTC.
Updates Information Summary: available
    1 New Package notice(s)
'
YUM OK: 0 Security Updates Available. 0 Non-Security Updates Available | security_updates_available=0 non_security_updates_available=0 total_updates_available=0