inheritance of dependencies from templates

[tvtue]

More info about this in the forum: http://www.shinken-monitoring.org/forum/index.php?topic=545

Seb-Solon : Copy here forum is moving

Hi,

I am trying to configure service dependencies for all nrpe checks of a host to the corresponding nrpe daemon on the same host. The problem is to write an elegant and short config for this.

Say I have 5 servers: server01, server02 ... server05. On each server the nrpe checks load, mem and disk.

I started creating servicedependency definitions for each nrpe check like so:

define service {
   use      my_service, nrpe
   hostgroup_name   my_servers
}

define service {
   use      my_service, load
   hostgroup_name   my-servers
}

define servicedependency {
   host_name            server01
   service_description   nrpe
   dependent_host_name   server01
   dependent_service_description   load
   notification_failure_criteria   c,u
   execution_failure_criteria   n
}

define servicedependency {
   host_name            server02
   service_description   nrpe
   dependent_host_name   server02
   dependent_service_description   load
   notification_failure_criteria   c,u
   execution_failure_criteria   n
}

define servicedependency {
   host_name            server03
   service_description   nrpe
   dependent_host_name   server03
   dependent_service_description   load
   notification_failure_criteria   c,u
   execution_failure_criteria   n
}
...

but that is lame and cumbersome.

Then I tried to use a servicegroup in the servicedependency definition:

define servicedependency {
   hostgroup_name           my_servers
   service_description   nrpe
   dependent_hostgroup_name   my_servers
   dependent_service_description   load, mem, disk
   notification_failure_criteria   c,u
   execution_failure_criteria   n
}

This "connects" every nrpe on any host with any load, mem and disk on any host. Kind a like an cartesian product. But that is wrong. What I need is a one on one dependency.

Then I asked in the monitoring portal for an elegant solution. Someone came up with the "same host depedency" trick, which I find to be very good. It can be achieved by leaving out the "dependent_host_name" or "dependent_hostgroup_name" line in the definition.

I tested this with only two hosts and one service on my Shinken 1.2 installation and with the following config:

define servicedependency {
   host_name            server01, server02
   service_description   nrpe
   #dependent_host_name   <empty> for same host dependency
   dependent_service_description   load
   notification_failure_criteria   w,c,u
   execution_failure_criteria   w,c,u
}

According to the "Impact Graph" Shinken still connects any nrpe services with any load service on every host.

Is this a bug in the core or in the Impact Graph rendering algorithm? How can I query servicedepencies? livestatus seems not to have a table "servicedependencies" or "servicedependencies".

TIA Timo

[Seb-Solon]

We should postpone it to 2.2 if it's not done.

[naparuba]

Too late for 2.0 sorry, will haveto wait 2.2

[naparuba]

wait again :)