How does Nrpe work in Nagios?

NRPE is a monitoring agent and protocol that is often used to monitor remote hosts with Nagios. NRPE works with: a client (check_nrpe plugin) that runs on the Nagios server. a daemon that runs on the remote server, processes requests from the client, and returns status information.

Is Nrpe deprecated?

As of 28 Jan 2020, NRPE has been deprecated.

Where are Nagios plugins stored?

Plugins are located in the /usr/local/nagios/libexec directory.

Does Nagios use SNMP?

Capabilities. Nagios provides complete monitoring of SNMP (Simple Network Management Protocol). SNMP is an “agentless” method of monitoring network devices and servers, and is often preferable to installing dedicated agents on target machines.

What are nagios plugins?

What Is A Plugin? Plugins are standalone extensions to Nagios Core that make it possible to monitor anything and everything with Core. Plugins process command-line arguments, perform a specific check, and then return the results to Nagios Core.

How can I check my nagios status?

3.2. 6. Verify the Nagios Configuration

  1. Log in as the root user.
  2. Verify that the updated configuration is working: # nagios -v /etc/nagios/nagios.cfg. If errors occur, check the parameters set in /etc/nagios/nagios. cfg , /etc/nagios/services. cfg , and /etc/nagios/hosts. cfg .
  3. Restart Nagios: # service nagios restart.

What is Nagios Nrpe server?

NRPE allows you to remotely execute Nagios plugins on other Linux/Unix machines. This allows you to monitor remote machine metrics (disk usage, CPU load, etc.). NRPE can also communicate with some of the Windows agent addons, so you can execute scripts and check metrics on remote Windows machines as well.

What is the OID for SNMP?

Object Identifier
In the Simple Network Management Protocol (SNMP), OID means an “Object Identifier.” To define OID, it’s an address used to uniquely identify managed devices and their statuses. Want to know the temperature reading coming from a sensor at your mountaintop remote facility?

What does return code 255 is out of bounds mean?

I am getting the error (Return code of 255 is out of bounds) on the http://localhost/nagios If you’re using NRPE and receiving a ‘NRPE: Unable to read output’ error it is because the NRPE daemon is not returning text data. The Nagios core depends on NRPE daemons to return a string that summarizes the results of the checks.

How to resolve return code error in Nagios?

Hope this helps, in my case the issue was an ssh issue. To resolve the return code error I remoted into the remote servers as the nagios user from the server where nagios is being used (master node if you will). Allowing an entry into the known_hosts file from the master nagios server.

Why is check_nrpe not working in Nagios?

My guess would be that your check_nrpe command is not properly set up in the Nagios configuration file. If you open the Commands.cfg file in /usr/local/nagios/etc/objects/ and double check that the command setup you have there is exactly the same as the setup you are using in your bash script. The command I have setup is:

What is the Nagios answer hub?

We’re moving to a new support system! The Nagios Answer Hub is a place where you can get help with technical questions from our experts. There, you can quickly open tickets and join discussion boards.