Nagios Support Forum

Hello

I have been tasked with installing Nagios and I would really like some direction on where to start to get help with documentation, step by step instructions etc. I realize this is probably a really dumb question but I have been a fan of Nagios since I used it at my old job and really want to learn it from the ground up.

Any direction, advise is appreciated.

Thanks!

Have you tried installing it yet? I wrote up some instructions for Centos 7 recently, which can be found at https://support.nagios.com/forum/viewto ... 84#p170884 - these should work fairly well for you.

As for the remaining questions, we would need more information about what you're trying to do specifically to point you the right direction.

Try to install it, and feel free to ask questions as you go.

Great - thank you! I am working on a Ubuntu 12.04.5 distribution - on a AWS server. My goal is to do basic monitoring for our clients - i.e: ping, disk space, etc.

Thanks!

This should work then, https://assets.nagios.com/downloads/nag ... Source.pdf - as for AWS though, we have seen issues with the minimal images. Make sure SELinux is disabled before you start.

Let us know if you run into any issues.

So this doc has been great! The one issue I have come into now seems to be the following:

root@nagios:/tmp/nagios-4.0.4# ./configure -–with-mail=/usr/bin/sendmail
configure: error: unrecognized option: -–with-mail=/usr/bin/sendmail

Not sure how to solve this one - the others worked fine...

Also - not sure where to find SELinux? We configure our servers the same every time since we deploy them for clients with the same builds (tomcat6, ubuntu etc.)

D'oh! I figured out the issue with the command --

Still not sure about the AWS SELinux.

Update:

had the following issues with the installation at the end:

root@nagios:/tmp/nagios-plugins-2.0# chkconfig --add nagios
/sbin/insserv: No such file or directory
nagios 0:off 1:off 2:off 3:off 4:off 5:off 6:off

I did
which chkconfig --> /sbin/chkconfig so that seems to be ok?



I thought I would try and see if I could get web access -- I got:

HTTP Status 404 - /nagios

type Status report

message /nagios

description The requested resource (/nagios) is not available.

Apache Tomcat/6.0.35

So now stuck. Thanks for all your help so far

Our standard install of Core utilizes the regular apache, not tomcat. With that said, our installs are meant to be on a minimal install (nothing before). Is there a specific reason you're using Tomcat?

What is the result of these two commands? To check SELinux, run the command getenforce - it should say disabled.

So here are the results:

root@nagios:/tmp/nagios-4.0.4# service nagios status
nagios (pid 24711) is running...
root@nagios:/tmp/nagios-4.0.4# service httpd status
httpd: unrecognized service
root@nagios:/tmp/nagios-4.0.4#

As for why Tomcat - it's what we use to run our software for our clients - and to save time today I just spun up another AMI using our default build. I can either remove it or start with a clean server if you think that is better? I don't need it since the only thing this server will do is run nagios.

I also tried to look into apache2
root@nagios:/tmp/nagios-4.0.4# sudo service apache2 start
* Starting web server apache2 apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
Action 'start' failed.
The Apache error log may have more information.

So that may give us some more information?

The program 'getenforce' is currently not installed. You can install it by typing:
apt-get install selinux-utils