Questions tagged [nagios]

Nagios Core is a network and system monitoring service with many plugins and a web interface.

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38 views

Nagios Core 3.5 change Date format

How can the Date/Time format that Nagios uses everywhere be changed to YYYY-MM-DD HH:MM:SS?
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1answer
25 views

Is it alright to add a disk size monitoring script for NAGIOS, using loop?

I have a process that gets sizes for all disks on server, writes it into a file like this # cat disksize DISK# ACTUAL WARNING CRITICAL disk1 12 20 30 disk2 45 60 75 first row of ...
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1answer
24 views

Unable to read nagios exit status in nagios core

I am using a command to throw a specific exit status when error count in one of my log files exceed a certain limit. Command is as follows: cd /home/serveradmin/logs/ | ls -trc | grep gateway | tail -...
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0answers
67 views

Enclosing the value of a variable in single quotes in BASH

I'm trying to adapt some Perl scripts to Bash to run them in Nagios XI. The problem is that Nagios expects the values of the variables to arrive between single quotes, but I can't manage to escape the ...
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0answers
9 views

how to toubleshoot nagios check_nrpe issues?

Steps done: On Nagios Server (CentOS 7) yum install nagios nagios-plugins-all On Target (CentOS 7) yum install nrpe nagios-plugins-all modified nrpe.cfg and added master IP to allowed_hosts ...
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26 views

CentOS Server connectivity problem

I have deployed a Nagios Core solution for my company, an ISP, to monitor customer's network devices (hosts). It is running on CentOS 7 as a Virtual Machine running on a physical server. However, I am ...
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1answer
80 views

Unable to stop nagios nrpe server

Note: I am referring to an old Ubuntu 14.04 ! :( Don't blame me, it's not my fault. I have this process When I kill, something restart it automatically. I need to stop it! I tried what follows ...
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1answer
15 views

What version of Nagios NCPA installed?

How can I find out what version of Nagios NCPA tools is installed on my Linux box?
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1answer
323 views

How to get rid of "Packages were downgraded and -y was used without --allow-downgrades" apt message

I use a Nagios test to check whether there are any packages critical updates in some Linux boxes. The check command uses the following command to look for pending critical updates: /usr/bin/apt-get -o ...
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1answer
762 views

NRPE Could not complete SSL handshake - Peer did not return a ceritificate

I am getting SSL Handshake errors with NRPE after enabling SSL. It worked perfectly fine without SSL doing check_nrpe. The allowed host is correct and when run without SSL enabled it shows the proper ...
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1answer
305 views

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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1answer
3k views

Swap issue and "read swap header failed" for /swapfile

My Swap memory shows SWAP critical 0% free on NMS. I tried: `$ swapon --show` but nothing showed up. I went on to do: $ free -m total used free shared buff/cache ...
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0answers
117 views

Tell nagios not to warn about non-critical updates

I use nagios to warn if there are apt updates available on my Debian buster server, but I want to use this option: -o, --only-critical Only warn about upgrades matching the critical list. The total ...
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1answer
231 views

How to set the nagios plugin path

When I am checking nagios setting. I bumped into this error. $ sudo /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg Nagios Core 4.4.5 Copyright (c) 2009-present Nagios Core ...
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1answer
2k views

What is OID,MIB? Check transfer amount by check_snmp

I am setting snmpd and try to check by check_snmp. snmpwalk -c public -v 2c localhost iso.3.6.1.2.1.1.1.0 = STRING: "Linux ik1-325-22819 4.15.0-55-generic #60-Ubuntu SMP Tue Jul 2 18:22:20 UTC 2019 ...
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1answer
48 views

Monitoring AWS by Nagios

I have an AWS EC2 project to be monitored by Nagios. My Nagios runs on a server outside of AWS. Service monitoring works, but host monitoring does not. How can I fix it? define host { use ...
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1answer
1k views

Sorry, user nagios is not allowed to execute 'SCRIPT.sh' as root on <HOST>

user1@<HOSTNAME>:~$ sudo -H -u nagios bash -c "sudo /usr/localcw/bin/check_disk.sh -w 10% -c 80% -p /boot" Sorry, user nagios is not allowed to execute '/usr/localcw/bin/check_disk.sh -w 10% -c ...
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2answers
112 views

Making a Nagios host less sensitive within specific time-periods

When a Nagios host object is added to multiple host templates (each with a different timeperiod assigned) Nagios only seems to select the first template in that use list. Can you give a host a ...
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2answers
914 views

NagiosQL Installation: Checking requirements. Write test on settings file (config/settings.php): failed

I've installed NagiosQL mostly following this tutorial. On the Checking requirements step I've got failed state for Write test on settings file (config/settings.php): How to make nagios pass Write ...
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379 views

Open port 12489 for nrpe

I'm learning a little bit of nagios and unix(buster), and im getting an error related with monitoring CPU LOAD and MEMORY USAGE The feedback I get from the monitor is connect to address 192.168.1.94 ...
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1answer
147 views

How to verify disk space for a given ip WITHOUT a password?

I am writing a Nagios plugin that will check disk space on a given IP (that would be a $HOSTADDRESS$ in plugin). The script is perfectly working but I need to enter a password every time I ssh. I ...
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26 views

Is there any other way to verify cpu on a remote machine besides snmp?

I am writing a script for Nagios that would be able to verify the cpu load on a remote machine I have already this line snmpget 127.0.0.1 -v 2c -c public .1.3.6.1.4.1.2021.11.9.0 | grep -Eo '[0-9]+$'...
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0answers
112 views

Why check_icmp plugin from centreon isn't working?

I am trying to create a custom command in centreon like $USER1$/check_icmp -H $HOSTADDRESS$ however before that I just want to test this plugin (that comes with centreon) in my console. For that I ...
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1answer
52 views

Can I install Nagios on Debian and can I do it from repository?

I want to install Nagios and I have my Debian VM running. On Nagios official site they say we need a minimal version of either CentOS or red hat. But can I install Nagios on Debian? Another issue is ...
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2answers
267 views

Where can I get Nagios plugin for cpu/hdd monitoring?

I have already installed nagios-plugins-contrib: sudo apt update sudo apt install nagios-plugins-contrib However, there are no any cpu / hdd management plugin. I am using a Debian VM just in case. ...
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0answers
385 views

shebang with /usr/bin/env and sudo

I have lots of scripts, usually they start with a shebang and /usr/bin/env and the required interpreter (for example "#!/usr/bin/env perl"). This works fine since many years, but for some reason I don'...
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0answers
537 views

Commenting out a specific host configuration in a Nagios configuration file

I have lots of Nagios configuration files like the one below in a directory, and I need to remove a host from monitoring. define host{ host_name nmo use aix-server alias hostgroups +...
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379 views

Debian : Iptables rule not staying persistent, getting deleted in sometime

I am working on a Debian stable system and we want to add a rule to allow access for Nagios. Unfortunately, the rule is automatically getting deleted after some time. We are unable to find out what's ...
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4answers
1k views

regular expression match text in curly braces and print whole curly braces

I have configuration file like: define host{ host_name xxxxxxxx1748 use windows-server alias Comet hostgroups +bu-automotiveprd,screen-automotiveprd2 address ...
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1answer
290 views

How should I grant a user the privilege to restart the nagios services?

What is the best way to grant user an access so they can restart the nagios services? I have added in visudo USER ALL = NOPASSWD: /usr/sbin/service ServiceName * But that did not work, I am using ...
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1answer
707 views

Nagios failing restart with new service directove in localhost.cfg [closed]

I started with the default localhost.cfg found in /usr/local/nagios/etc/objects. I simply added a service field at the top of the appropriate section. I used existing "ping" service section as a ...
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2answers
2k views

Nagios: How to determine parameter order check_ssh

My linux box uses a nonstandard port for ssh. Nagios' check_ssh (of course) keeps marking the process as critical since it can't connect on that port. The object file localhost.cfg allows for ...
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1answer
36 views

Setup a monitoring server to get alerts when hw/sw failure and wanted to define certain rules to monitor in server activity [closed]

Setup a monitoring server to get alerts when hw/sw failure and wanted to define certain rules to monitor server activity. Also I wanted to get alerts when something get crashed or when sensitive files ...
0
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1answer
62 views

Does the time field in a csv exported nagios XI State History Report represent the last time a service was checked for that time period in the report?

I've done an export of the State History Report in nagios XI to export to a CSV for a specified time period. I get back the fields time, host, service, statechange, statetype, currentattempt, ...
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0answers
38 views

How to stop nagios from initially pulling a report?

I work with the nagios webapp with a rather large number of machines; so many in fact that when I pull up the report window the window times out when it does it's inital "today" query. If I'm fast ...
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1answer
642 views

Cannot stop SELinux from blocking Apache accessing /usr/local/nagios/var/rw/nagios.cmd

I have a Centos 7 server running Nagios Core 4.3.4 with Apache 2.4.6 in our UAT environment. I have a second server in PROD that was set up with the same Ansible playbook. Nagios was built from ...
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1answer
2k views

Nagios variable $HOSTNAME$ in service definition

I got the following error: Error: Could not find any host matching '$HOSTNAME$' (config file '/usr/local/nagios/etc/servers/example.com.cfg', starting on line 136) Error: Failed to expand host list '...
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2answers
660 views

Does iptables has pid ..?

I'm using pid number to monitor uptime of all critical services. But I'm unable to find pid for iptables. Does iptables have pid?
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0answers
343 views

Nagios core 4 Audio Alarms problem with firefox

i've searched everywhere for a solution but i start to think there's something i do not understand in the problem i've discovered on a nagios core installation. I've configured audio alarms (beep and ...
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1answer
407 views

Nagios e-mail notifications on RPi

I have a PC on my network that I want to monitor with a simple periodic ping from a Raspberry Pi. I'm totally new to the RPi and Linux and this seemingly simple project is turning into a massive ...
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1answer
350 views

Cannot find EPEL packages for 6.5 - is there a vault somewhere?

I cannot find EPEL packages for 6.5 - is there a vault somewhere? Specifically, I need the following RPMs but am unable to find them. This is in support of a legacy system, and we cannot upgrade it or ...
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1answer
1k views

Nagios read() returned error 11 error

I am facing Nagios showing error "got read() returned error 11" notification.
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2answers
336 views

Installing nagios 3.5.1 with epel repo

I am trying to install nagios-core 3.5.1 with yum using epel repo. I am facing problems since the old versions of nagios has been removed from epel-repo. The latest epel-repo is coming with nagios 4.3....
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0answers
42 views

List service as failing only after a certain duration

My Debian systems have unattended-upgrades installed, which installs security upgrades automatically, once per day. I also have a Nagios check that reports whether upgrades need to be installed. In ...
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2answers
177 views

bin file downloaded when I visit my IP address [closed]

I have setup nagios on my Ubuntu, but when I go to my IP address, it downloads a BIN file. Why is this happening? The address is: http://46.101.145.158/nagios
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1answer
942 views

Nagios: are certificates required for SSL/TLS?

Configuring check_nrpe and NRPE daemon with --enable-ssl generates a DH key pair. Are these DH keys enough to establish SSL connection? Or do we need certs and keys signed by a CA? Docs say ...
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1answer
1k views

Loop iteration and output result in single line.

I have this script i'm trying to write. #!/bin/bash libexec="/usr/local/nagios/libexec" #hostname=$1 hostname="hostname1 hostname2 hostname3 hostname4 hostname5 hostname6" nagios_ok=0 nagios_warning=...
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0answers
506 views

Nagios plugin fails to run a command over NRPE

I have the following plugin whose status is OK on core. #!/usr/local/bin/bash if [ "$1" = "-w" ] && [ "$2" -lt "101" ] && [ "$3" = "-c" ] && [ "$4" -lt "101" ] ; then warn=$...
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1answer
78 views

Nagios compilation problem in hardened OS

I am trying to install nagios in hardened OS CentOS, but I can not: checking for a BSD-compatible install... /usr/bin/install -c checking build system type... x86_64-pc-linux-gnu checking host system ...
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0answers
253 views

Nagios network traffic monitoring plugin for FreeBSD

Is there a Nagios network traffic plugin for FreeBSD machines? I have been using the following plugin on Ubuntu which uses /proc/net/dev and thus not supported in FreeBSD. https://exchange.nagios.org/...