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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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Nagios - Information only checks?

In Zabbix, you are able to set a check to be "Information only" which means that it will still do the check and gather the metrics (for the performance graphs), but there is no status to ...
Element Zero's user avatar
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0 answers
112 views

On client nrpe linux server, what to do to set a new dh key, to solve `check_nrpe: dh key too small`

I am moving a Nagios4 server from a Debian Stretch to a Ubuntu 22.04. I am monitoring a Debian Stretch server, when the Nagios4 server was on Debian Stretch, the check was working, now on Ubuntu 22.04 ...
nulll's user avatar
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1 vote
2 answers
63 views

`systemctl reload` fails, but failed status not recognized by `systemctl is-failed`

On Ubuntu 22.04 server, I have a bash script that reloads nagios4 config. After the reload I would like to check if the service is fine #!/bin/bash sudo systemctl reload nagios4.service if (systemctl ...
nulll's user avatar
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check_ping in nagios resolves to ipv6 instead of ipv4

mn1.testchn1s1.ind ~# /usr/lib64/nagios/plugins/check_ping -H mn1.testchn1s1.pub -w "700,60%" -c "1400,100%" -p 5 -4 -s PING OK - Packet loss = 0%, RTA = 0.10 ms - mn1.testchn1s1....
sree's user avatar
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2 answers
85 views

How to cause high iowait on Linux

I wrote a Nagios script to send alerts when IOwait increases. Now I need a command that can spike it so I can test my monitoring script with different threshold values, any advice?
Prince Linuxer's user avatar
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0 answers
107 views

Nagios SNMP not alerting when check returns 0

I'm trying to setup a check for a water cooling device. If the flow rate hits 0, I want to setup an alert. Here is my config: #/etc/nagios/custom/commands.cfg ## Chillwater define command { ...
itinneed2022_1's user avatar
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0 answers
56 views

How do I change the default Nagios Threshold values when creating a new host

When I create a new host the default threshold values are already set for CPU, memory and disk space on each volume. I am wondering if I can set these default values somewhere in the Nagios config so ...
PrestonDocks's user avatar
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1 answer
84 views

Command not running in Nagios

Can anyone clarify for me why the following code is not running when I place it in command_line for a custom Nagios command? It works when I run it in terminal. command_name notify-host-by-sms ...
DesignerJT's user avatar
0 votes
1 answer
41 views

What's wrong with my nagios kdc configuration?

I want to setup a service to check the kdc with nagios. With my kdc (samba4) I create the user using this script #!/bin/bash USER=nagioskerberos DOMAIN=myhost.priv SERVICE=nagioskerberos FQDN=nagios1....
elbarna's user avatar
  • 338
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1 answer
254 views

Debian 11, Nagios4, and 403 forbidden

Having installed Debian's Nagios4 package I can't access it. Apache gives me this: AH01797: client denied by server configuration: /usr/share/nagios4/htdocs I've tried various things, such as ...
knirirr's user avatar
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1 answer
160 views

Remote call of NRPE comman fails in one case, while succeeding locally in all

I have amazingly strange issue with monitoring a CIFS (SMB) shared folder mounted to Linux machines by Nagios + NRPE. NRPE process runs on the Linux machines under dedicated user nrpe: # systemctl ...
Cat Mucius's user avatar
0 votes
1 answer
367 views

Nagios core GUI/UI fails to open after nagios-4.4.6-4 to 4.4.9-1 update on Rhel8

Nagios core GUI/UI fails to open after nagios-4.4.6-4 to 4.4.9-1 update on Rhel8 vm. Whoops! Error: Could not read host and service status information! Nothing in /var/log/nagios/nagios.log. /sbin/...
LinServFaulter's user avatar
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0 answers
70 views

Is it possible to fine grain different types of notifications in Nagios?

I wondered if I could fine tune Nagios notifications For example: For most services, only CRITICAL notifications For some individual services, both CRITICAL and WARNING notifications For some other ...
SirLouen's user avatar
0 votes
1 answer
159 views

Which one to learn: Nagios or Zabbix?

I need to answer a network administrator student which tool is more useful in terms of "employability" at the moment : Nagios or Zabbix. But this is not my field. I've heard that Nagios had ...
Plouff's user avatar
  • 103
0 votes
1 answer
315 views

check_ssh returning Permission denied

I'm a long time Nagios fan, like 15 years. In one of my environments, I have Nagios and NRPE running on several Linux hosts and everything has been working as expected for several months. I recently ...
Tim Perkins's user avatar
2 votes
1 answer
1k views

How to get SNMP on HP StoreOnce working?

I'm trying to add HPE StoreOnce 3640 Gen4 to the Nagios using SNMP v3 (other SNMP versions aren't supported in this device), and I'm stuck. It has the SW version 4.2.1-1942.21. This is not the first ...
Nikita Kipriyanov's user avatar
0 votes
1 answer
167 views

Nagios BAT file not returning correct status code

I've written a batch file for a Windows server to detect whether a particular service is running and if it isn't, return a Critical status back to Nagios. The script works perfectly (as in, it can ...
Chris Douglas's user avatar
1 vote
2 answers
747 views

What is difference between host checks and service checks in Nagios and why both are needed?

Nagios has two kinds of objects: hosts, which represent systems with distinct IP addresses services, which are associated with hosts Each host is considered a collection of services; for example, we ...
Nikita Kipriyanov's user avatar
0 votes
1 answer
53 views

Nagios on a virtual network

I am trying to emulate a virtual network in Kathara (ex. NetKit), based on OSPF and BGP routing and I am new to this. After emulating the network I need to monitor it using Nagios, but my question is ...
Jul's user avatar
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0 answers
14 views

NRPE: Command 'check_ssh' not defined [duplicate]

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&...
Tim Perkins's user avatar
0 votes
1 answer
322 views

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/...
The Shurrican's user avatar
0 votes
1 answer
706 views

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 ...
Kamil Bu's user avatar
0 votes
1 answer
198 views

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 ...
Colin 't Hart's user avatar
0 votes
1 answer
605 views

Nagios check_nt MEMUSAGE average

there is a method to check the memory (RAM) usage by the average in windows? (Like CPULOAD -l minutes)
Gianluca Falconi's user avatar
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0 answers
58 views

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 ...
user52337's user avatar
  • 103
0 votes
1 answer
2k views

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/...
qroberts's user avatar
  • 285
1 vote
1 answer
289 views

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 ...
muhib's user avatar
  • 11
0 votes
2 answers
513 views

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 ...
Nishi Naagar's user avatar
0 votes
2 answers
470 views

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 ...
donmelchior's user avatar
0 votes
1 answer
420 views

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 ...
Jim Miller's user avatar
0 votes
1 answer
182 views

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 ...
DevOpsSauce's user avatar
0 votes
1 answer
2k views

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 ...
Pedro's user avatar
  • 1
0 votes
1 answer
40 views

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 ...
Philippe's user avatar
0 votes
1 answer
688 views

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 ...
Franco.g's user avatar
1 vote
1 answer
1k 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 ...
Gabriel's user avatar
  • 111
-1 votes
1 answer
387 views

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 ...
Michael Altfield's user avatar
0 votes
1 answer
85 views

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 ...
MOBIN TM's user avatar
0 votes
1 answer
588 views

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,...
MOBIN TM's user avatar
0 votes
1 answer
394 views

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 ...
JineshJK's user avatar
0 votes
1 answer
780 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 ...
Meni's user avatar
  • 91
0 votes
0 answers
229 views

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 ...
alessio's user avatar
  • 11
1 vote
1 answer
436 views

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 ...
JadenBZH's user avatar
0 votes
0 answers
42 views

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....
Evgeniy Pozdnyakov's user avatar
1 vote
1 answer
77 views

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,...
Noam Yizraeli's user avatar
0 votes
1 answer
1k views

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 ...
msana's user avatar
  • 3
0 votes
0 answers
369 views

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 ...
gelonida's user avatar
  • 279
0 votes
1 answer
6k views

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 ...
DuckReconMajor's user avatar
0 votes
1 answer
188 views

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 ...
Vatoch Mr's user avatar
0 votes
1 answer
1k views

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,...
jordanthompson's user avatar
2 votes
0 answers
451 views

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 ...
2one's user avatar
  • 141

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