Category: Nagios

Monitoring multiple SSL certificates on a single host using Nagios XI

May 28, 2014

I was recently looking to monitor multiple SSL certificates on a host for multiple network services, to which Nagios appeared to have a limitation within the ‘check_xi_service_http_cert’ check command  to which it can only monitor a single SSL certificate per monitored host.  I therefore created a powershell script to allow for multiple certificates to be … More Monitoring multiple SSL certificates on a single host using Nagios XI

Monitoring vCenter privelage reassignment with Nagios XI

May 20, 2014

During a restart of the ‘VMware VirtualCenter Server’ service, if a user or group assigned to the Administrator Role at the root folder level could not be verified during the restart the user privelages are revoked. As part of security hardening on the vCenter server, I created a Nagios Remote Plugin Executor (NRPE) to search for … More Monitoring vCenter privelage reassignment with Nagios XI

CPU Stats service reports “UNKNOWN: iostat not found or is not executable by the nagios user.”

March 27, 2014

When monitoring Linux hosts in Nagios XI, the following error was being reported for the CPU Stats service: “UNKNOWN: iostat not found or is not executable by the nagios user.” This is due to the check command having a dependency on the performance and monitoring tool sysstats, in order to resolve the issue install the … More CPU Stats service reports “UNKNOWN: iostat not found or is not executable by the nagios user.”

Monitor Windows Update Last Success Time with Nagios XI

March 16, 2014

I was recently asked to provide a monitoring service for the last success success time of Windows Update and to provide status information within Nagios XI. Basically, the last success time was compared to be run a time span period of a number of days in the past to provide a service state. In the … More Monitor Windows Update Last Success Time with Nagios XI

Monitoring the status of Domain Controller Diagnostics Tool (dcdiag.exe) with Nagios XI

February 15, 2014

I was recently looking at monitoring the service health of Active Directory Domain Services using Nagios XI, the default monitoring wizards only provide the ability to monitor an LDAP server. However, I was looking to monitor a number of services similar to those available from running the Domain Contoller Diagnostics Tool (dcdiag.exe) – http://technet.microsoft.com/en-us/library/cc776854(v=ws.10).aspx. Therefore, I … More Monitoring the status of Domain Controller Diagnostics Tool (dcdiag.exe) with Nagios XI