OMD Labs servicegroups creation

I will post some articles about how to use the OMD Ansible role and will start with service groups.

• Hosts
• Add hosts from the Ansible inventory
• Configure service
• Add linux servicegroup

Hosts

We’ve following hosts defined in the Ansible inventory:

[linux]
smtp.example.com
imap.example.com
dns.example.com

Add hosts from the Ansible inventory

We need to add this group of hosts into Naemon via the omd_naemon_hosts_hash

omd_site_hash:
  - name: test
    omd_naemon_hosts_hash:
    linux:
      # enable_inventory_hostname: true # set this if you don't gather facts from these hosts

This will create some host objects at etc/naemon/conf.d/hosts.cfg

define host {
    host_name    smtp
    address      smtp.example.com
    use          generic-host
}

define host {
    host_name    imap
    address      imap.example.com
    use          generic-host
}

define host {
    host_name    dns
    address      dns.example.com
    use          generic-host
}

Configure service

I will add a simple check_disk service object:

omd_naemon_services_hash:
  check_disk:
    host_name: 'smtp,imap,dns'
    check_command: 'check_disk!-w 10%!-c 5%'
    check_interval: '60'

The service will be added to etc/naemon/conf.d/services.cfg

define service {
    host_name           smtp,imap,dns
    service_description check_disk
    check_command       check_disk!-w 10%!-c 5%
    check_interval      60
    use                 generic-service
}

Add linux servicegroup

Everything is prepared to create a servicegroup now. I will add every service (with *) defined on these hosts to the servicegroup.

{% raw %}

omd_naemon_servicegroups_hash:
  linux:
    members: "{{ groups['linux'] | map('extract', hostvars, ['ansible_hostname']) | join(', *, ') }}, *"
    members: "{{ groups['linux'] | join(', *, ') }}, *" # a servicegroup without ansible facts

{% endraw %}

The outcome will be a servicegroup called linux at etc/naemon/conf.d/servicegroups.cfg

define servicegroup {
  servicegroup_name linux
  alias             linux
  members           smtp, *, imap, *, dns, *
}