Questions tagged [nagios]

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

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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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18 views

Selinux context problem with Nagios ncpa plugin

I am installing the NCPA Nagios plugin in different servers for checking many parameters. Basically, NCPA runs a script in a remote machine and report the result to the Nagios server; NCPA every ...
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2answers
31 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
260 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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66 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
66 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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21 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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35 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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18 views

Why I have an UNKNOWN state in my Nagios while script provides another output? [duplicate]

I am using this cript for custom plugin in Nagios and I have 9% of disk space used. According to the script it has to be exit 0 (which is OK) since it's it's in the 1-84 range, however for some reason ...
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1answer
43 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
98 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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190 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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126 views

“Couldn't match /usr/bin/mailq output” after Debian Upgrade

I recently upgraded one of our Debian systems from Debian 7.11 to Debian 9.8. After the upgrade everything seems to be working as expected except for our monitoring server seems to have one error ...
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112 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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291 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
770 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
120 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
482 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
750 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
33 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 ...
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1answer
47 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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36 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
368 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
1k 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
305 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
289 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
229 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
235 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
780 views

Nagios read() returned error 11 error

I am facing Nagios showing error "got read() returned error 11" notification.
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2answers
281 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
40 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
162 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
554 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
469 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
53 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
220 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/...
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1answer
2k views

How to extract data from XML File

I am trying to move our Pre-existing PRTG setup to a Nagios setup. The problem is that we currently have over 20k monitors, and so i'm trying to export the sensor information out of the .dat file and ...
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1answer
487 views

Nagios Monitoring Via a Bastion Box

I have a bastion server that has access to 50 machines running different Linux systems. I also have a separate Nagios server that has access to the bastion box. Is it possible to monitor the 50 ...
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1answer
697 views

insert text at specific position with grep or vim [closed]

I need to insert text at specific position but the line can be anywhere because file is huge 1000 to 2000 lines and information is added in middle or anywhere. A short version of example below: 1 ...
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1answer
107 views

Why can't Nagios start Oracle Database through event handler?

I'm trying to start my oracle database as it goes down using an event handler script. The object configuration file oraclehost.cfg has: define host { host_name Test_Oracle ...
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1answer
217 views

Monitor the number of not leased yet IP address in Window DHCP Server with Nagios in Linux

Sometimes, the IP address are used up and they don't change their state letting the server to allocate all address. How to use Nagios to monitor the number of not leased yet ip address in pool in ...
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1answer
2k views

libssl.so.6 not found for check_nrpe

I couldn't get NRPE to work, so I ran it locally and this error popped up: ./check_nrpe: error while loading shared libraries: libssl.so.6: cannot open shared object file: No such file or directory ...
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1answer
989 views

How to specify nrpe port in icinga / nagios

I have 2 servers behind NAT, both have same public IP and NRPE is listening on non-standard ports. I would like to monitor them both using my central icinga server, but I can't find where can I ...
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1answer
74 views

Nagios/SNMP - devices alerting when ppp/tun connections cycle

Sorry if this is a repeat. I searched, but with no luck. I'm using SNMPd on an openwrt/wr host with some ppp and tun connections. These connections get IDs in the if table, and will actually get a ...
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1answer
624 views

check_http plugin failing to check strings separated with multiple spaces in between

I have this URL where content strings are separated on the webpage. I need to check where on the same line those two strings are present or not. Say, on this page I have "API Operational" strings ...
1
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1answer
626 views

Nagios memory free plug-in misbehaving after upgrade to Debian Stretch

We use Nagios here for monitoring our servers. On the test network I upgraded to Debian 9/Stretch, the memory monitoring box/object in our Nagios monitoring platform says CRITICAL and next to it, ...
2
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1answer
444 views

Strange nagios-nrpe-server error upgrading from Jessie to Stretch

When upgrading from Jessie to Stretch, at the end of dist-upgrade, it ends with an error: Errors were encountered while processing: nagios-nrpe-server E: Sub-process /usr/bin/dpkg returned an error ...
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1answer
430 views

Creating nagios plugin from php script [closed]

I have a php script which parses xml file. I want to create plugin for Nagios, which will use that php script, or any other solution that would parse the xml file for attribute to change and monitor ...
3
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0answers
565 views

Nagios - Help with getting NRPE to work with check_fail2ban.sh

I am trying to monitor fail2ban with Nagios so, I found the following check via a Google search: http://nagios.fm4dd.com/plugins/manual/check_fail2ban.htm I am trying to get the check to work on a ...