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03-Configuration.md

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Manubulon SNMP Plugins Configuration

Each plugin requires a command definition which defines the command line parameters and arguments passed from service checks.

Icinga 2

The Icinga 2 Template Library (ITL) already provides many CheckCommand definitions out of the box. This enables you to just use the CheckCommand object and focus on your service apply rules.

Icinga 2: Best Practices

Best practice is to store the credentials in a separate constant:

vim /etc/icinga2/constants.conf

const ManubulonSnmpCommunity = "icingasnmpro"

Define a generic SNMP service template and set common attributes.

template Service "snmp-template" {
  vars.snmp_community = ManubulonSnmpCommunity
}

Icinga 2: Apply Rules

Define service apply rules like this:

apply Service "snmp-memory" {
  import "snmp-template"
  check_command = "snmp-memory"

  vars.snmp_warn = "50,0"
  vars.snmp_crit = "80,0"

  assign where "snmp" in host.groups
}

apply Service "snmp-storage /var" {
  import "snmp-template"
  check_command = "snmp-storage"

  vars.snmp_warn = "50"
  vars.snmp_crit = "80"
  vars.snmp_storage_name = "/var"

  assign where "snmp" in host.groups
}

apply Service "snmp-storage" {
  import "snmp-template"
  check_command = "snmp-storage"

  vars.snmp_warn = "50"
  vars.snmp_crit = "80"

  assign where "snmp" in host.groups
}

Icinga 2: Apply For Rules

A more complex example using apply for rules is to store the monitored storage disks on the host. This allows to generate service objects in a more efficient way.

object Host "snmp-host" {
  check_command = "hostalive"

  vars.snmp_storage["/"] = {
    snmp_warn = "80"
    snmp_crit = "90"
  }
  vars.snmp_storage["/var"] = {
    snmp_warn = "60"
    snmp_crit = "90"
  }
}

apply Service "snmp-storage-" for (storage_name => config in host.vars.snmp_storage) {
  import "snmp-template"

  display_name = "Storage: " + storage_name

  vars += config
  vars.snmp_storage_name = storage_name
}

Icinga 1.x/Naemon/Nagios

You need to write a check command definition and use that in your service definitions. Please refer to this documentation.