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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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 with Nagios? I don't want to spend hours setting it…
Milan Babuškov
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What are your most useful/valued Nagios plugins?

We're expanding our Nagios 3 setup, and are frequently coming across new NRPE or general Nagios plugins to test our existing infrastructure. This is in dribs and drabs though - it would be useful to get a summary of plugins that the Nagios users out…
Mike Pountney
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How to stop/Disable Nagios email notifications

How Can I stop the email notifications. I am setting up a new server and getting tons of notifications. Wants to disable them for time being.
Ramesh Kumar
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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 (only servers) Proto Recv-Q Send-Q Local Address …
Gary Richardson
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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 expected. Running the command by hand (as defined in…
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What is the correct pronunciation of Nagios?

I've puzzled and debated over this for a while, so it's time to ask the community. What is the correct accepted pronunciation of Nagios, or at least the most common pronunciation? This topic is addressed in the project's FAQ, but the linked .mp3…
Michael
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How can I manually run a nagios check from the command line?

When defining and testing new services in nagios I have been restarting nagios, then clicking the service, and rescheduling a check for as soon as possible, then waiting until the check happens. Is there a more efficient way to do this? I'd like to…
cwd
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Shinken - Anyone using it?

I've recently discovered Shinken, which is a new implementation of Nagios using python. Shinken "divides" Nagios in 5 different types of daemons, each one performing separated tasks. I haven't tried it yet but for what I've seen the whole…
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Making ssh truly quiet

I'm half way through writing a nagios script and I've hit an annoyance with SSH. According to the man page: -q Quiet mode. Causes all warning and diagnostic messages to be suppressed. Yet if I enable the quiet flag and then pass an…
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Monit versus Nagios

Does nagios offer any additional functionality when compared to monit? This answer states that monit is a clumsy tool for situational awareness, which is the reason I'm asking the question.
Kaan
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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
boonana
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Monitoring production server

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 service when failing. Thing is we need a much better way…
Adam Benayoun
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How can I force a MySQL table to become corrupted?

I have written a simple Nagios plugin that calls mysqlcheck (which checks for corrupted tables) and will give a warning if any are corrupt. However none of my tables are corrupt now. So I'm not 100% sure that my plugin is working fine. I have a dev…
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How to check when yum update was last run

Is there a canonical way to find out the last time that yum update was run on a system? Our set up is that we have staging servers that run automatic updates, and provided they don't fall over, we will manually update our production servers about…
Hamish Downer
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There is any monitoring hosted solution?

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 returning a expected result).
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