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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.

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

Nagios watches hosts and services that you specify, alerting you when things go bad and when they get better. Some of its many features include monitoring of network services (SMTP, POP3, HTTP, NNTP, ICMP, etc.), monitoring of host resources (processor load, disk usage, etc.), and contact notifications when service or host problems occur and get resolved (via email, pager, or user-defined method).

Nagios is extremely customizable. Its mechanism for checking the status of hosts and services is to run standalone programs the communicate with the Nagios master via their standardoutput and return codes. It is therefore relatively easy to add new status checks to Nagios without much work beyond writing the standalone program and configuring Nagios to call it.

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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.
Sunil Enugala
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Best tool for monitoring backups, etc. and trending statstics from that data

I have done some research on nagios, opennms, and zenoss but am not confident that I have found what I am looking for. The main driving force for me right now is being able to monitor backups. This includes mysql, mssql, and eventually some file…
Randy Syring
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High load on a nagios server -- How many service checks for a nagios server is too many?

I have a nagios server running Ubuntu with a 2.0 GHz Intel Processor, a RAID10 array, and 400 MB of RAM. It monitors a total of 42 services across 8 hosts, most of which are checked using the check_http plugin even 5 minutes, some every minute.…
Josh
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How to monitor Windows host with Nagios?

How do I use Nagios to monitor Windows clients? Are there any alternative solutions available?
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Is there a way to exclude specific hosts from a Nagios hostgroup?

I have a Nagios server which includes many hostgroups. One of these hostgroups include a server which I'd like to exclude from being checked for one specific Nagios Check but I want it to keep being a member of the hostgroup so it may get checked…
Itai Ganot
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Best Nagios plugin for SMARTd / smartmontools?

I've installed SMARTd / smartmontools on a server and I want to monitor it over Nagios. However on Monitoring Exchange, I see several…
Amandasaurus
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Is there a way to share S.M.A.R.T. data over SNMP?

Is there a way to share S.M.A.R.T. data over SNMP? I'd like to be able to make cacti graphs of it and hook it up to Nagios. What I want to do is be able to get some statistics on my harddisks accessible over SNMP. This will allow me to graph the…
Amandasaurus
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Can I set up a different method of authentication on Nagios?

Nagios is a wonderful too for monitoring servers. Their web interface is not bad, either. However I am not crazy about using the HTTP Authentication that comes standard. Is there a way to use another method of authentication? (and I don't mean…
cwd
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Interpreting Nagios check_disk output

The following command on Nagios's default "check_disk" command gives the following output: # ./check_disk -w 20% -c 10% -p / --units=MB DISK OK - free space: / 17887 MB (47% inode=93%);| /=19481MB;31495;35432;0;39369 All well and good, but does…
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How to manage Nagios dependencies on big clusters?

I'm using quite a big nagios configuration (about 4000 services), without any dependencies. This results in a huge mess of notifications when something goes wrong. I try to look for best practices with Nagios Dependencies, but all I find on the web…
Falken
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Nagios Check that Simulates Web Full Rendering Time

Does anyone know of a Nagios plugin or cli program that can simulate the load time of a webpage as it would be in a browser. For example the resulting total load time of something like Pingdom's Full Page Test or the timeline you get from firebug.
Kyle Brandt
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What exactly is "check_nrpe_1arg"?

I see in a lot of the Nagios documentation references to check_nrpe_1arg. Can anyone explain exactly what this is, or does? I see nothing in the Nagios documentation, or anywhere else on the web, that comes right out and says "check_nrpe_1arg does…
user58251
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Nagios configuration management

I am going to implement Nagios (most likely anyway, could turn out to be another tool as well) and I was wondering if anyone would like to share their best practices when it comes to creating, managing and maintaining the config files when it comes…
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Wildcards in Nagios hostgroup_name exclusions

I'm having difficulty finding good documentation for wildcards and regular expressions (particularly as they work with exclusions) in Nagios. Here is an example of what I'm trying to do: In nagios.cfg, the following are set, supposedly enabling *…
Jeremy Koppel
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Good methods for monitoring EC2 instances

I'd like to hear your approaches for monitoring Linux instances running in EC2. I'm very accustomed to using Nagios to monitor all manner of aspects of a Web-based application's ecosystem, but its model doesn't seem to lend itself particularly well…
user5336
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