Questions tagged [nagios]

Nagios is a monitoring system that enables organizations to identify and resolve IT infrastructure problems before they affect critical business processes.

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NRPE: Command 'check_ssh' not defined

We have a new Nagios Core server monitoring Linux hosts running NRPE plugins. Most of them are working as expected, but the SSH Monitor is failing with "NRPE: Command 'check_ssh' not defined&...
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nagios-nrpe-server output different vs running locally

To be sure I don't have any double definition of the command, I created a new debug command name in the nrpe config /etc/nagios/nrpe.d # grep -R debug debug.cfg:command[debug_check_disks]=/usr/lib/...
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Change url for thruk

following the official documentation, they report that to modify the thruk url, you have to change the url_prefix, I have added the following information in the path /etc/thruk/thruk_local.conf ...
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Linux server nrpe nagios check_procs process state monitoring - need info, when process is restarted

I need to be informed by nagios when a process on a remote server is restarted. The only thing I do not know how to do is to check its process state, and what way to do it? I got in remote server this ...
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Naemon still sending DOWN notifications for removed host

I shutdown an old web server, and immediately started receiving DOWN notifications from Naemon. Now I have removed that host entirely from the Naemon config, and restarted the Naemon service. Yet I ...
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What's the difference between developing and using naghelp and nagiosplugin?

What's the difference between developing and using naghelp and nagiosplugin for Nagios plugins? When would you use one rather than the other?
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Nagios check_nt MEMUSAGE average

there is a method to check the memory (RAM) usage by the average in windows? (Like CPULOAD -l minutes)
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Widget data in centreon is not coming due to accidental file deletion

I am on Centreon 2.8.22, I was playing with a certain widget and I accidentally extracted all the files of that widget in the widget folder. So then I was deleting all the files which was extracted ...
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Nagios - 'Error: Could not open config directory' but permissions are correct and selinux is permissive

Trying to setup a separate directory to store my nagios configuration files and when I attempt to validate the configuration I get the below error. Error: Could not open config directory '/usr/local/...
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Keep SSH connected until command output completes

I am trying to setup a Nagios rule that runs an SSH command and outputs the contents to a file. The issue I believe I am running into is that SSH runs the command and closes the connection before the ...
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How to configure NDRP clients on Nagios Core Server

Good day all. I am new to nagios core and I have spend a number of days trying to configure a Nagios Core Server lying in a public subnet to receive passive checks from VMs in a private subnet with a ...
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Monitoring Linux Servers behind squid proxy via Nagioscore

This is my first post here, please help me. I want to monitor a few redhat servers which are behind a squid proxy server. I have done the below configuration: RedHat Node behind proxy server ...
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Mass acknowledging alert in NAGIOS

Good evening to all! I was wondering around to find solution of mass acknowledging the alerts all at once for 500+ service notification in Nagios. After a long hardship, I came across building below ...
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How to properly display accentuated characters in a check_nrpe result based on a Powershell script?

I have a custom Powershell script called by Nagios using "check_nrpe". Currently all check results output messages with special characters like 'è', 'é' or 'à' are not displayed properly ...
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How can I make check_nrpe alert on certain event log ID and recover on another

I'm trying to make a check_nrpe check through Nagios that will alert me on event log being generated and resolve the alert when another event log is generated(recover). Currently I'm using the ...
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Nagios check_procs not reporting processes not spawned by root

I am trying to set up Nagios to monitor the nginx service on my load balancer but have been unsuccessful in getting it to show the service being up. The command and service definition are below. It ...
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Nagios SNMPTT trap Logs issues

I had a quick question regarding the nagios snmptt trap logs. The traps arent coming through in the snmptt.log with proper date..its stuck on May 17th.. it has logs for all days till May 17.. It is ...
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Grafana false positive SNMP down

NOTE: I also have Nagios running on another server that reports bandwidth warnings and up/down status. Not a single switch is alerting from this, only Grafana. Grafana version 1.14.1 I was receiving ...
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Give permission to Larvel web app in Centos 7 to add/delete/edit files

I build a new web interface by Larvel 8 for nagios core in Centos 7, everything is OK I can open the interface in browser, except one thing it s add/delete/edit files in nagios repositry cuz I want to ...
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How to monitor login authentication using http_check nagios plugin

I'm using the http_check Nagios plugin to monitor an URL and I'd like to test if the login is working given specific user and password. I've made several attempts with different approaches but none of ...
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Shinken probe on windows server but windows server on VPN network (monitoring server outside VPN)

I need to monitore a windows server with skinken, but this server is accessible with a VPN connection (with strong security, done by an electronic tool and human action). The monitoring server is not ...
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Nagios: NRPE unable to read output

I really hope that someone can provide a solution for me. I have check_memory to check my remote hosts, but no matter what I try, I keep getting "NRPE unable to read output" on the Nagios ...
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395 views

Nagios - Setting a host as down when passive checks freshness is expired?

The environment has only passive check enables. Active checks are not possible. The objective of the configuration is that Nagios report a host as "Down" when the host has not reported ...
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Website Monitoring of Tor Onion Services [closed]

How can I monitor the uptime of my website's tor hidden service endpoint so I get an immediate notification if it goes offline? Bonus points for fancy monthly/yearly uptime reports. I'd like to make ...
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Nagios alert to a file

Is there any way to store Nagios alert to a file. We have a private network and Nagios is configured there to monitor 100+ servers. Since there is no mail server in this network default nagios alert ...
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Nagios server is not detecting if client vm's are rebooted

I have configured nagios server and added 30+ physical servers and 25+ vm's. All the configuration has completed and nagios server is monitoring servers,vm's and services. But when I am rebooting a vm,...
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How to fetch and display Nagios service thresholds in Alert mails

I need to show the service threshold values (-w ARG1 and -c ARG2) for WARNING and CRITICAL state in the alert mail body. Along with the SERVICESTATE and SERVICEOUTPUT mail recipients will get better ...
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218 views

Not found error when accessing Nagios

I have followed this guide https://www.digitalocean.com/community/tutorials/how-to-install-nagios-4-and-monitor-your-servers-on-centos-7 in order to install nagios in my centos 7.8 system installation ...
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ssh tunnel from nagios to greenbone socket

i got 2 servers running. serverA is a monitoring solution check_mk. serverB is a vulnerability scanner with gvm20.08 (openVAS). On my monitoring side i want to retrieve scans, tasks, targets etc. from ...
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A check_nrpe command doesn't work from nagios server since debian upgrade

Yesterday I upgraded a server from Debian 9 to Debian 10. This server is supervised with nagios. Since the upgrade, I get an alert, status Unknown saying : "Volumegroup array03-0 wasn't valid or ...
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incorrect define of host/hostgroup/service

Good day. Recently, I tried to enable domain expiry check on my nagios core 4.1.1, but it seems like it won't work. I believe, i messed up with declaration of host/hostgroup/service. mine "domain....
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What monitoring system should I use for offline network [closed]

I'm part of a sysadmin\DevOps team for for an application. Currently today we have about 25 - 40 vms running as different parts of the application in micro services on the openshift container platform,...
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check_snmp plugin timedout icinga2

I am new to icinga, and at the moment I am trying to monitor a paloalto firewall running paOS 9.0 with OID 1.3.6.1.2.1.25.3.3.1.2.1 (hrProcessorLoad.1), but I have problems with the check_snmp plugin ...
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monitor CRL expiration dates for multiple nginx servers

Rephrased question: (Not sure it's really clearer) I have a small self written script, that monitors multiple servers. In fact my script just starts periodically tiny smalls scripts and gathers the ...
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1 vote
1 answer
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How to change Nagios check_snmp configuration to use SNMP v3

I posted this on SuperUser but I realized this question is probably more relevant here. I am trying to check uptime via Nagios's check_snmp plugin on a SNMP version 3 enabled UPS. I'm able to do an ...
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Remote monitoring by Nagios Core

I am working on a project using Nagios to monitor a controller that monitors gas leaks, temperature,... remotely. How can a Nagios Core in one city communicate and receive supervision information ...
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Nagios4 prompts for username/password but has limited capabilities after logged in

I followed the instructions from here: https://support.nagios.com/forum/viewtopic.php?f=7&t=56970 And now nagios prompts me to log in. It is correctly parsing the username/password. Unfortunately,...
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Virtual machine network issue with host and ping service checks (within Nagios Core and from command line)

I have got a Ubuntu server guest virtual machine (installed via virt-install) which runs Nagios Core monitoring but there is a major issue with the monitoring (i.e. ping packet loss / RTA or ...
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Nagios is alerting CHECK_NRPE: Socket timeout after 30 seconds but it is running

I have nagios on my server which is alerting me CHECK_NRPE: Socket timeout after 30 seconds. But my service is running: ● nagios-nrpe-server.service - Nagios Remote Plugin Executor Loaded: ...
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Creating memory check via nagios core

How to check memory and incoming/outgoing connections of host. I have created memory usage i am getting error as below. Name of service:Memory Usage Status:UNKNOWN Last Check:03-13-2020 04:05:45 ...
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Two nagios instances in the same machine

After days of surfing on the net and trying by myself, I urgently need your help. So, I have Nagios Core 4.4.3 installed in my centos machine that I use to monitor PROD and TEST environnement of one ...
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Nagios - check procs and --metric=elapsed on the same service

After many days of working and searching onn the net, I'm getting back to you as a last chance for help. I'm working actually on monitoring unix process with nagios core 4.4.3 with nrpe . My goal is ...
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NSClient++ rejects connection or fails to send info

I'm trying to get to work some active checks on Windows endpoint machines, NSClient++ works just fine with my Windows servers but when it comes to checking any endpoint the only response I get is ...
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Nagios Core4.4.3 snmptrap

I followed the instructions at the link: Snmptrap-config-ling To configure Nagios Core 4.4.3 with snmptrap for a Sonicwall, and a Netapp, it works perfectly but I have a problem / error with: When I ...
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Asserting on extended information from Nagios's check_mysql

I'm running the check_mysql plugin using NRPE on a remote DB-server, and while I can get satisfactory data on whether or not the server process is working as needed, I see that the plugin outputs a ...
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1k views

Nagios NRPE won't allow arguments

I am trying to use a Nagios NRPE plugin to communicate with my servers. I have a command definition in /etc/nagios/nrpe_local.cfg to use it: command[check_service]=/usr/lib/nagios/plugins/...
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mk-livestatus No UNIX Socket Existing

I'm currently in the process of setting up NagVis, and one of the prerequisites is that mk-livestatus be up and running on your Nagios server. This is proving difficult. The website for check_mk ...
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260 views

Authentication Failure using mod_authnz_ldap with Active Directory

I've set up a Nagios Core server on CentOS and I want people to be able to use their AD credentials to log into the web interface. At the moment, the httpd configuration is: AuthBasicProvider ...
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MySQL least privileges to get database/tables size

I'm using centreon_plugins to monitor some mysql databases. As a best practice I create a dedicated user for monitoring and I give it the least possible privileges. For simple monitoring I usually ...
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1k views

Nagios Core 4.4.5 Ncpa 2.2.0 Monitor Disk Usage in Windows Machines

I'd like to achieve the following result: from nagios core 4.4.5 receive disk usage information on several windows servers using ncpa 2.2.0. Right now I did the following thing. I configured in nagios ...
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