dns_check service implentation issues

[lordberre]

Hi Nagios community,

I have some issues with setting up dns_check on my Nagios system. What I want is my system to monitor the response time of different DNS-servers.

Like this:
Monitor responstime google.com using DNS1
Monitor responstime google.com using DNS2
Monitor responstime google.com using DNS3
Everything from the same host.

I've read several guides on how to achieve this, but I'm stuck.

The current status is that I've added a service in the localhost cfg:

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lordberre@ubuntu:/etc/nagios3/conf.d$ cat localhost_nagios2.cfg
# DNS-Check
define service{
        use                             generic-service         ; Name of service template to use
        host_name                       localhost
        service_description             DNS 2
        check_command                   check_dns!google.com

And verified that the plugin itself is working:

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lordberre@ubuntu:/usr/lib/nagios/plugins$ ./check_dns -H google.com -s 8.8.8.8
DNS OK: 0.049 seconds response time. google.com returns 216.58.209.110|time=0.048552s;;;0.000000

But I'm getting

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"4/4 	CRITICAL - Plugin timed out while executing system call"

error in the Nagios Web-GUI.

Initially, I just wanted to set up the DNS-checking for the currently used DNS server, then proceed with adding the other one, but I haven't really gotten anywhere (I'm a complete noob at this).

System: Ubuntu 14.04 running on a VMWare (v11) machine.

Any help appreciated!

[jdalrymple]

Is your localhost (Nagios server) the DNS server you're trying to query. The line

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        host_name                       localhost

makes it seem that way. I think what you want is to create 3 hosts, DNS1, DNS2, DNS3. Something like:

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define host {
        host_name                       DNS1
        use                             generic-host
        alias                           DNS1
        address                         IPADDRESS_OF_DNS1
        register                        1
        }

Then your services would look more like this:

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define service{
        use                             generic-service
        host_name                       DNS1
        service_description             DNS 1
        check_command                   check_dns!-s google.com
        }

Make sense?

[Box293]

Can you please post the command definition for check_dns