Nagios not working after Update

[lmiltchev]

You have config errors that you need to fix:

Error: Cannot open resource file '/etc/nagios3/resource.cfg' for reading!
Read main config file okay...
Processing object config file '/etc/nagios3/commands.cfg'...
Error: Cannot open config file '/etc/nagios3/commands.cfg' for reading: No such file or directory
Error processing object config files!

Do the "resource.cfg" and "commands.cfg" files exist? What are the permissions of these files? Is the path to these files correctly defined in the "nagios.cfg"?

Code: Select all

resource_file=/path/to/resource.cfg
cfg_file=/path/to/commands.cfg

[Darth_Panda]

Nagios 3 I started to install accidentally after I caused the first problem. I should just have Nagios Core. Can I remove Nagios 3? Would I just use apt-get uninstall nagios3?

[Box293]

I believe what you have is the included OS distribution of Nagios, which is the same but usually lacking behind in versions, as opposed to building Nagios Core from source.

It might be easier to start fresh on a new build and bring your configs across (all the .cfg files) ... this is the core of Nagios monitoring. I'm unsure how Cacti integrates so that might be a hurdle for you as well.

As a suggestion you could deploy a Nagios XI VM and test it for 60 days, importing your existing configs. If it suits your needs it might be better in the long run to purchase it as it has support and a known deployment method. It's just always hard to troubleshoot some problems when many different options like cacti are integrated in.

[Darth_Panda]

My preference would be to stick to the free versions. I have set up a virtual machine with Jessie to test on before I reload the server. How do I check the Nagios version that comes free with Jessie (if it does). Unless that's a Wheezy only thing.

[Box293]

https://packages.debian.org/search?sear ... rds=nagios

Looks like it's 3.5.1

[Darth_Panda]

https://packages.debian.org/search?sear ... rds=nagios

Looks like it's 3.5.1

Thanks, so would it be pre-installed or do I need to grab it from apt-get ? Also another important question. Please see my Nagios status below. Can I import all my hosts and host groups in to my new build?

root@watchtower:~# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

Nagios Core 4.0.8
Copyright (c) 2009-present Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 08-12-2014
License: GPL

Website: http://www.nagios.org
Reading configuration data...
Read main config file okay...
Warning: failure_prediction_enabled is obsoleted and no longer has any effect in service type objects (config file '/usr/local/nagios/etc/servicetemplates.cfg', starting at line 14)
Read object config files okay...

Running pre-flight check on configuration data...

Checking objects...
Checked 1 services.
Checked 851 hosts.
Checked 66 host groups.
Checked 0 service groups.
Checked 2 contacts.
Checked 2 contact groups.
Checked 24 commands.
Checked 5 time periods.
Checked 0 host escalations.
Checked 0 service escalations.
Checking for circular paths...
Checked 851 hosts
Checked 0 service dependencies
Checked 0 host dependencies
Checked 5 timeperiods
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...

Total Warnings: 0
Total Errors: 0

Things look okay - No serious problems were detected during the pre-flight check

[Box293]

I believe you would install it via apt-get.

https://packages.debian.org/search?sear ... rds=nagios

Looks like it's 3.5.1

Thanks, so would it be pre-installed or do I need to grab it from apt-get ? Also another important question. Please see my Nagios status below. Can I import all my hosts and host groups in to my new build?

root@watchtower:~# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

Nagios Core 4.0.8

It does look like you are using 4.0.8. You could have been using 3.5.1 before this "update" so it must have been built from source ... but I could be wrong because it does throw this warning:

Warning: failure_prediction_enabled is obsoleted and no longer has any effect in service type objects (config file '/usr/local/nagios/etc/servicetemplates.cfg', starting at line 14)

My previous link to that guide would walk you through building it from source.

Basically everything under
/usr/local/nagios/etc
Is where the configs are and your should be able to copy/paste.

In this file:
/usr/local/nagios/etc/nagios.cfg

It has the definitions of what config files/folders it uses.

[Darth_Panda]

My previous link to that guide would walk you through building it from source.

Basically everything under
/usr/local/nagios/etc
Is where the configs are and your should be able to copy/paste.

In this file:
/usr/local/nagios/etc/nagios.cfg

It has the definitions of what config files/folders it uses.

Thanks. That's good news, that is going to save me so much configuration time. I could have this back to the way it was in a few hours. I am going to take a look at your guide also. Just one question regarding copy and paste on Linux.
If I am connected through TTY to the old server and the new server, how would I copy and paste my cfg files between the two?

[Box293]

You could scp:

Example if logged onto new server:

Code: Select all

mkdir /var/tmp/old_nagios
scp root@old_ip_address:/usr/local/nagios/etc/*.* /var/tmp/old_nagios/

[Darth_Panda]

You could scp:

Example if logged onto new server:

Code: Select all

mkdir /var/tmp/old_nagios
scp root@old_ip_address:/usr/local/nagios/etc/*.* /var/tmp/old_nagios/

Thanks!