Getting null when checking remote load.

[Tõnis Trei]

Hello,

Munin is a *networked resource monitoring tool. Its installed on 0.5 machine
as a client.
The script */usr/local/nagios/libexec/check_munin.pl is located on 0.1
machine and it should make the connection to 0.5 to fetch the information.

Well as far as i understand Use_node_name has to be set to YES. Thats
atleast what all the howto-s on the web are telling.
Didn't sound very logical for me aswell, but example cases i checked had it
always on YES.

Tõnis


>
> 2011/6/8 Andreas Ericsson <ae at op5.se>
>
>> On 06/08/2011 04:27 PM, Tõnis Trei wrote:
>> > Hello,
>> >
>> > Yeah, i started to look through my explanation and seems i didn't
>> explained
>> > it good enough while misunderstanding few things myself :)
>> > So thanks for pointing it out.
>> >
>> > I have one sever with address 192.168.0.5 that runs linux, has installed
>> > munin-node and i want to monitor its load.
>> > Munin-node has the load plugin.
>> >
>>
>> I assume Munin is some system where "plugin" has a different
>> meaning than it does in Nagios. Bear in mind that I have no
>> idea what munin is or what it does.
>>
>> > Then i have another server with the ip 192.168.0.1 that has installed
>> both
>> > Nagios and Munin Server.
>> > Now instead of checking the Munin server for graphs, i want Nagios to
>> > trigger a plugin that checks the load on the machine.
>> >
>> > I even changed few things in config to test, but no luck.
>> >
>> > So Nagios has in command.cfg the following def:
>> > define command{
>> >          command_name    check_remote_load
>> >          command_line    /usr/local/nagios/libexec/check_munin.pl -H
>> > $HOSTADDRESS$ -M $ARG1$ -w $ARG2$ -c $ARG3$
>> > }
>> >
>>
>> Is the script /usr/local/nagios/libexec/check_munin.pl located
>> on 192.168.0.1 or on 192.168.0.5? It should reside on 192.168.0.1,
>> and the script itself should connect to 192.168.0.1 with the
>> correct parameters to fetch the data from that particular node.
>>
>> > And i have specified the following host with the service:
>> > define host {
>> >          use             linux-server
>> >          host_name       Remote_Server
>> >          address         192.168.0.5
>> >          alias           RS
>> >          contacts        admin
>> > }
>> >
>> > define service {
>> >          use                             generic-service
>> >          hostgroup_name                  linux-servers
>> >          service_description             load
>> >          check_command                   check_remote_load!load!8!10!
>> >          servicegroups                   +load
>> >          first_notification_delay        10
>> >          contact_groups
>> > }
>> >
>> > Munin-node.conf on 192.168.0.5 has the "allow ^192\.168\.0\.1$"
>> >
>> > And munin.congf on 192.168.0.1 has the following entry:
>> > [application;Remote_Server]
>> >      address 192.168.0.5
>> >      use_node_name yes
>> >
>> > So as i understand nagios should be triggering the check_munin.plscript
>> > towards the host Remote_Server. Munin node there should return the load
>> > parameters and nagios will return warning on 8 and critical on 10.
>> >
>> > Please correct me if i got something wrong :)
>> >
>>
>> You say "use_node_name" in the munin.conf on 192.168.0.1 but
>> still connect via ip address. I don't know anything about
>> Munin, but that seems like one possible source of error if
>> check_munin.pl expects you to pass it a munin node-name.
>>
>> --
>> Andreas Ericsson                   andreas.ericsson at op5.se
>> OP5 AB                             www.op5.se
>> Tel: +46 8-230225                  Fax: +46 8-230231
>>
>> Considering the successes of the wars on alcohol, poverty, drugs and
>> terror, I think we should give some serious thought to declaring war
>> on peace.
>>
>
>
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