Defining service dependency

[Assaf Flatto]

Asrai khn wrote:
> Hi list,
>
> I want to define service dependency, i have read the relevant nagios 
> docs but I am not getting how to define one. we are running nagios 
> 3.2.x (pre build binary on centos 5.4)
> Eg, I want to define service dependency for all services that been 
> checked with nrpe, ie if nrpe not running on remote host then nagios 
> shouldn't send notifications for these services instead just for nrpe.
>
> Few days back our monitoring host send lot of notifications coz of 
> nrpe wasn't running on remote hosts, in this case I want nagios only 
> alert for 'nrpe' not all the services that being checked with nrpe.
>
> 1. So first I have define a service to check nrpe on remote hosts.
>
> # Command def for checking nrpe on remote hosts.
> define command{
>     command_name    nrpe_service
>     command_line    $USER1$/check_nrpe -H $HOSTADDRESS$
>     }
>
>
> 2. define a service for each hostgroup.
>
> # service def.
> define service{
>         use                             check-interval-service
>         service_description      nrpe
>         check_command         nrpe_service
>         hostgroup_name          Sol-Servers
>             }
>
> So far so good, I have several hosts (linux, solaris, hp) all of them 
> have the following standard service definition for checking remote 
> hosts service via check_nrpe
>
> define service{
>         use                             local-service
>         host_name                   BB-2,NB-1
>         service_description       SCC Procs
>         check_command          check_nrpe!check_scc_procs
>     }
> define service{
>         use                             local-service
>         host_name                   BB-2
>         service_description       SCC Partition
>         check_command           nrpe_disk!check_disk4
>         }
>
> we have 5-10 nrpe check for each hosts which are scattered in 
> different hostgroups.
>
> Now how to define a dependency so that if 'nrpe' service fail on 
> remote hosts nagios shouldn't send alerts for services whom check via 
> nrpe.
>
> Any configuration example will be greatly appreciated.
>
> Due to binary version of nagios installed it will not possible for me 
> to go for any patching solution.

You got so far and stopped near the finish line !!
define servicedependency{
       host_name                   BB-2,NB-1
       service                         nrpe
       dependent_host          BB-2,NB-1
       dendent_service     SCC Partition
       execution_failure_criteria      u,c,p
       notification_failure_criteria   u,c,p
    }

this is of the top of my head - you will need to make sure the 
directives are according to the nagios definitions (I'm sure i got at 
least one wrong) , but that is the way to move on.

Have fun.
      


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