1- if we are going to Design Nagios Server with Redundancy,"Active-passive" Nagios servers,can you provide me with Docs for that ? Not really -- those docs don't exist. Nagios XI has some limited high availability documentation: https://assets.nagios.com/downloads/nagiosxi/docs/High-Avail...

Can you share your Nagios command definition for the check_nrpe command?

Nagios Fusion exists to offer a "single pane of glass" for multiple Nagios Core instances. It doesn't interface directly with Thruk, but if the original Nagios Core CGIs are still reachable, Fusion should work fine. Assuming you wanted the entire state of all zones to be held by a Nagios ...

My intention in posting those GitHub issues was to indicate that there are known inefficiencies within those CGIs. jfrickson indicated ( in #271 ) that eliminating portions of the report can provide some performance gains. Throwing hardware at the problem (as suggested by npolovenko via a ramdisk) i...

I am going to assume you are using this copy of the check_dd.pl plugin: https://exchange.nagios.org/directory/Plugins/Hardware/Storage-Systems/Others/Check-DataDomain/details The error you are seeing is a general SNMP connection failure. It is not specific to this plugin -- many Perl based plugins u...

I'm wondering what the status of the report overhauls for Nagios Core 5 are? I vaguely recall such an item on the roadmap and it's been mentioned for Core 5 before: https://github.com/NagiosEnterprises/nagioscore/issues/143 https://github.com/NagiosEnterprises/nagioscore/issues/280 Those CGIs could ...

It might also be worthwhile to review the parent host definition (for www.mysite.it) and make sure address and host_name are the same, in this case.

Add a "step 1.5" to wipe all existing ElasticSearch data and cluster state, and it *MIGHT* work. Trying to join 2 individual ElasticSearch nodes with individual data and cluster state into a 2-node cluster doesn't generally work out well. Particularly with each individual node likely shari...

Time periods are the answer: https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/timeperiods.html You can also use timeperiods to control when notifications can be sent out to individual contacts. By using the service_notification_period and host_notification_period directives in con...

For a single instance of Nagios Core, a given check gets assigned to a check worker: https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/configmain.html Check Workers Format: check_workers=<#> Example: check_workers=10 This setting specifies how many worker process should be started ...