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h1. Introduction

The probes available in the Petals internals and components are able to send JMX notifications when they detect a defect. These notifications can be sent to Nagios with a dedicated monitoring command of Petals CLI that receive JMX notifications and write them in the channel of Nagios passive checks.

{gliffy:name=Nagios passive checks|size=L|align=center|version=1}

The daemon *{{petals-cli-nagios}}* listen JMX notifications using a dedicated Petals CLI command. When it receives a JMX notification, it formats and prints an external command for Nagios. The host and service emitting the JMX notification are transformed into Nagios host and Nagios service through a mapping file.

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