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

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2
votes
4answers
2k views

Nagios check whether at least one out of two services is OK

I have two following passive services: ServiceA, ServiceB on one machine. I would like to have a sittuation when the OK state is satisfied by following conditions: ServiceA is OK or ServiceB is OK ...
18
votes
4answers
2k views

Monitoring production server [closed]

Hey all, We have 3 dedicated server, splitted in several VPS using openVZ. We're using munin to monitor the VPS with the production sites, and monit on some one of the VPS to make sure it restarts the ...
15
votes
9answers
9k views

There is any monitoring hosted solution? [closed]

I know Zabbix and Nagios, but I don't know any company that host those services for others to use. I would like to find a solution that monitored at least some of my public URLs (if they are ...
1
vote
1answer
2k views

nagios - Web interface: authentication through kerberos OK, what about authorization on cgi.cfg?

I have successfully installed nagios, and it provides authentication through apache2 which contacts a kerberos authentication server to authenticate users. Now, users are authenticated, but they don'...
7
votes
5answers
34k views

What Warning and Critical values to use for check_load?

Right now I am using these values: # y = c * p / 100 # y: nagios value # c: number of cores # p: wanted load procent # 4 cores # time 5 minutes 10 minutes 15 minutes # warning: 90% ...
5
votes
3answers
9k views

Monitor ESXi hosts with Nagios

Does anyone recommend any methods for monitoring ESXi 4.1 hosts with Nagios? I have looked into SNMP but it seems to be in a pretty sorry state. Net-SNMP does not seem to be included and there is a ...
21
votes
13answers
60k views

NRPE unable to read output, but why?

I have this problem with NRPE, all the stuff I've found so far on the net seems to point me at things I've already tried. # /usr/local/nagios/plugins/check_nrpe -H nrpeclient gives NRPE v2.12 as ...
8
votes
5answers
4k views

Nagios server best practices?

I run a medium-sized Nagios server. It monitors roughly 40 servers with 180 services currently and is only growing by the day. I migrated from an old Nagios setup that was configured in a very ...
7
votes
8answers
20k views

How do I configure Nagios mobile / SMS alerts?

How do I send alerts from Nagios monitoring tool to mobile? Any resources or links or tutorials are fine.
10
votes
6answers
21k views

Defining the email address which Nagios sends emails from

Hi currently Nagios sends notifications from nagios@server.domain.com, How do I go about configuring this? Thanks
9
votes
2answers
2k views

Send all outgoing mail to /dev/null

With sendmail, how would you send all outgoing mail to /dev/null or just prevent email from being queued up or sent at all? On a development nagios box I want prevent sending of mail so that ...
6
votes
6answers
14k views

Use Nagios to monitor a log file and send log details

I know Nagios can monitor and alert on the content within a log file, but does anyone know of a plug-in, or other tool, that will monitor a log file for a particular string and then send the entire ...
5
votes
1answer
4k views

Configure Nagios To Alert Depending On Host Group That Service Alert Originates From

So my setup: Services are shared between all hosts (CPU/RAM/Disk/Services). Hosts are split into two main groups: "Production" and "Development". We have two contact groups: "Production" and "...
2
votes
1answer
371 views

Can ZenOSS integrate Ganglia smoothly?

I like Ganglia for its Gmetric function, and I like its multi-layer capability. But Ganglia does not have healthiness check, alerting and etc. for the server monitor functionality. So it would be ...
2
votes
2answers
4k views

Monitoring /proc/sys/fs/inode-nr

As part of a general overhaul of some Nagios scripts, I am adding parameters to the scripts so that the thresholds can be determined on a machine-by-machine basis. As an example, we are specifying ...
-1
votes
2answers
1k views

Check NRPE APT now working through Nagios

I'm able to monitor hosts' package statuses via terminal; but Nagios web ui gives an error like this: (No output returned from plugin) Here's the command that works properly via terminal: /usr/lib/...
-2
votes
2answers
3k views

How to configure nagios realtime SMS alert

I have configured nagios SMS alert and it takes around one minute to send notification. I want to get SMS notification withing one/two second(s) after system/service failure. I could not find any way ...
38
votes
4answers
22k views

Munin vs Nagios

We're currently using Nagios to monitor about 20 Linux machines (services and functional links). I just find out about Munin and I wonder if this is a Nagios replacement, or it can be used together ...
58
votes
5answers
20k views

How does Ubuntu keep track of the “System restart required” flag in motd?

I have a few Ubuntu servers (8.10, 9.10) that is set to automatically install security updates. Some times these updates requires a restart of the system, and this string is shown in motd: *** System ...
16
votes
8answers
8k views

Nagios alerts by telephone?

I have a couple of nagios servers that currently alert me via SMS and email, but I'd like to add outgoing calls to that. The ideal solution would have the nagios machines call my cellphone and play an ...
7
votes
5answers
12k views

Network port open, but no process attached?

I have a weird situation going on with an open network port. My main question is, why would there not be a program associated with an open TCP port: netstat -ln --program Active Internet connections (...
6
votes
2answers
3k views

How does an administrator generalize alerting when an event doesn't happen?

Often my users require me to be just as responsible for knowing if an event hasn't happened. I've always had to build custom and brittle solutions with cron'ed shell scripts and lots of date edge ...
9
votes
6answers
2k views

How to monitor Windows host with Nagios?

How do I use Nagios to monitor Windows clients? Are there any alternative solutions available?
3
votes
3answers
6k views

Pros/cons of NRPE and SNMP with Nagios 3?

I have been using Nagios 3 with NRPE on the clients for some time now, and it works great. Now I heard that if I used SNMP I wouldn't have to install check_ plugins on each client. So does anyone ...
3
votes
3answers
2k views

Nagios plugin to take process snapshot when load is high

We have configured Nagios with check_load via NRPE plugin to monitor server load, it reports when load is high, but does not have option to take a snapshot top processes (like top command) at that ...
14
votes
6answers
1k views

How do you monitor a monitoring server?

So we run Groundworks (with Nagios) on CentOS to monitor our various servers and processes. I have it setup to automatically send emails and SMS texts when things reach a WARNING or CRITICAL state. ...
5
votes
1answer
21k views

Nagios check service frequency based on service status

Am trying to detect disk thrashing by monitoring si, so from the vmstat command. I am monitoring other services using nagios and service check happens after every 5 minutes. For this thrashing service ...
4
votes
1answer
8k views

Nagios not following redirect with check_http

Currently for testing I set the service check as follows: define service{ use generic-service host_name <host> service_description HTTP check_command check_http!-s "blablabla" -f ...
3
votes
1answer
10k views

Nagios - check_ntp_time - Offset Unknown

I have a local NTP server running on the subnet to keep other subnet nodes in sync, without every node syncing with upstream servers. But, while implementing the check_ntp_time plugin for Nagios I am ...
5
votes
5answers
6k views

Nagios Multiple servers config files

I'm already configuring a Nagios setup to monitor about 30 Windows servers. Now i am adding every servers definition to the Windows.cfg file but i think would be easyly configurable to have one .cfg ...
5
votes
3answers
15k views

Nagios alert by email for WARNING and pager for CRITICAL [duplicate]

I want to set Nagios up to issue warnings (e.g. mildly high load or disk usage) via email, but for critical items to alert by pager. Right now we notify via email and pager simultaneously for all ...
4
votes
1answer
509 views

measuring bandwidth per-user used by ssh server-side connections on linux

I'd like to be able to measure the bandwidth used by each user by their inbound ssh connections, into a linux box. I measure most other traffic using iptables and user-matching, but inbound ssh ...
4
votes
1answer
6k views

NAGIOS notification command for service/contactgroup

We have 3 templates for services, low-priority, high-priorty and medium-priorty. Low priority services are attached to the contactgroup low, medium priorty services are attached to the contact group ...
4
votes
2answers
415 views

Nagios alerts using twitter (with twurl) not firing

We've been using nagios for some time and have recently decided to change how we receive alerts. To this end, we've installed twurl ( https://github.com/marcel/twurl ) and are using it to send alerts. ...
4
votes
2answers
3k views

Overriding Nagios hostgroup service with host service

I currently am experimenting with defining a set of services to all hosts in a hostgroup, this is working fine. My issue is that I then want to be able to override these service definitions which ...
3
votes
1answer
835 views

Does Mac OS X SNMP report cached memory?

We're using a Nagios plugin to check the chassis of hosts over SNMP. I'm trying to set up a mac os x machine, but it's failing. All the rest of our hosts we're checking are Linux. This is the first ...
2
votes
3answers
7k views

How I can check for exact amount of space (MB or GB) in Nagios using check_nt command instead of percentage used value?

How I can check for exact amount of space left (MB or GB) in Nagios using check_nt command instead of percentage value? Currently I'm using this command: check_command check_nt!...
2
votes
4answers
4k views

How to send an “Everything is OK” notification from Nagios?

I need to configure Nagios to send a notification that says everything goes well, if there's no problems. Does this sort of setting exist or is there a plugin for that?
0
votes
4answers
737 views

More detail EC2 instances monitoring? [closed]

I am currently using AWS Cloudwatch to monitor basic metrics of my EC2 servers. But it is lacking of detail monitoring such as partition space used, memory free etc. Should I install and use Nagios, ...
6
votes
2answers
23k views

Nagios “CRITICAL - Socket timeout after 10 seconds” problems with service and host Checks

got a little bit of a problem with a Nagios system we are using in our office, which has only recently started appearing. what i would like to know really is the best solution to resolve this problem ...
5
votes
3answers
11k views

Change how Nagios determines if server is offline?

I'm new to nagios and my server is on a network which does not allow the server to be pinged. Is it possible for me to check if the server is up another way? e.g via SSH or HTTP? How would I do this ...
3
votes
5answers
3k views

Allow host down while under nagios watch

We're using nagios to watch our servers health. Now we have a task to add server which will be up only for certain time. And during that time we have to ensure that all services are up and running. ...
3
votes
1answer
5k views

CHECK_NRPE: Error - Could not complete SSL handshake

I've just moved to a new nagios server and have got all the old hosts/services working. There is just one host that will not allow nrpe checks, producing an error on the nagios server as in the title. ...
3
votes
1answer
839 views

Dynamically setting a new test interval for Nagios checks

Nagios check notification intervals must be >= to a check interval because this prevents Nagios from sending out false alarm notifications should a service return to an UP status between checks. I ...
3
votes
4answers
4k views

Monitor multiple webs within a server in nagios

i would like to monitor/test multiple virtual hosts in an Apache Webserver and besides, i would like that these checks appears as a one service in Nagios -> HTTP. And if one of the web/URL fails, the ...
3
votes
5answers
2k views

Windows Pagefile monitoring with Nagios

I have a NAGIOS check that monitors virtual memory on a windows machine, this check returns all the virtual memory used (physical+ max size of the pagefile). This is not what I want, I have tried to ...
2
votes
1answer
2k views

Nagios NTP, discarding peer

We're using nagios *check_ntp_time* for monitoring time on our servers. Unfortunately the service is flapping. And reporting a lot of false-positives. It happens everytime for random server in random ...
2
votes
1answer
8k views

Nagios - NSClient++ cannot run included external script

I am running Nagios 3.5 on a Centos 7 machine. The setup is used to monitor some Windows machines via NRPE (check_nrpe commands). For the time being I am using the preconfigured 'alias' commands that ...
2
votes
1answer
291 views

Is there a Nagios plugin that enables you to specify the referrer URL when checking a URL?

I want to monitor site A that only accepts requests for a certain URL if the requests originate from site B. I know Wget has an option of downloading content protected by referrer like so wget --...
2
votes
2answers
2k views

Getting the currently logged-in user to a Windows XP Pro system

We have a XP machine which runs scheduled tasks early in the morning and unfortunately has to be logged into the desktop of a certain user for that to work. Unfortunately, that user sometimes gets ...