Générateur de conf Nagios

Brouillon

object configuration files

Voir :

Voir aussi :

Fichiers plats à garder en statique :

commands.cfg
contacts.cfg
localhost.cfg
templates.cfg
timeperiods.cfg

Fichier à supprimer ou à regénérer :

printer.cfg
switch.cfg
windows.cfg

Types d'objets à générer :

host
hostgroup
service
servicegroup ?

Dans le conf par défaut nous avons les templates suivants pour les hosts

generic-host
linux-server
windows-server
generic-printer
generic-switch

et pour les services :

generic-service
local-service (utiliser que dans localhost.cfg)

Proposition de format YAML

---

hosts:
  - host_name:             "srv1"
    use:                   "linux-server"
    alias:                 "Server 1"
    address:               "192.168.1.10"
    __comment:             "Server One"
    __lines:               [3, 12]

  - host_name:             "hplj2605dn"
    use:                   "generic-printer"
    alias:                 "HP LaserJet 2605dn"
    address:               "192.168.1.30"
    hostgroups:            "network-printers"             # Member of hostgroup

  - host_name:             "winserver"
    use:                   "windows-server"               # Template contains "hostgroups windows-servers"
    alias:                 "My Windows Server"
    address:               "192.168.1.2"

hostgroups:
  - hostgroup_name:        "linux-servers"
    alias:                 "Linux Servers"
    # members:             "srv1"                         # Member of hostgroup
    # hostgroup_members:

  - hostgroup_name:        "network-printers"
    alias:                 "Network Printers"

  - hostgroup_name:        "windows-servers"
    alias:                 "Windows Servers"

services:
  - service_description:   "SSH"
    use:                   "generic-service"
    #hostgroup:             "linux-remote-servers"
    hostgroup_name:        "generic-remote-hosts"
    check_command:         "check_ssh"                                                                                                                                           

  - service_description:   "NSClient++ Version"
    use:                   "generic-service"
    host_name:             "winserver"
    check_command:         "check_nt!CLIENTVERSION"

  - service_description:   Memory
    hostgroup_name:        "linux-servers"
    check_command:         "check_centreon_snmp_linux_mem!80!90"
    max_check_attempts:    1
    normal_check_interval: 1
    retry_check_interval:  1
    check_period:          "24x7"
    notification_interval: 2000
    notification_period:   "24x7"
    notification_options:  "w,c,r"
    contact_groups:        "support"
    event_handler:         "trigger_memory"

Entrées :

printer.yaml
switch.yaml
windows.yaml
linux.yaml

Sorties :

printer.cfg
switch.cfg
windows.cfg
linux.cfg

On ajoute un template au fichier templates.cfg

templates.cfg

#define host {
#
#    name                 tpl-host-windows
#    use                  windows-server
#    hostgroups           windows-hosts
#    register             0
#    }
 

define host {

    name                 linux-remote-servers
    use                  linux-server
    hostgroups           linux-hosts
    register             0
    }

Il faudra créer les hostgroups associer (à faire à partir de YAML)

linux.cfg

define hostgroup {
    hostgroup_name       linux-hosts
    alias                Linux Hosts
}

windows.cfg

define hostgroup {

    hostgroup_name       windows-hosts
    alias                Windows Hosts
}

Changer la définition des hosts use linux-server use linux-remote-servers

templates2.cfg

 
###############################################################################
#
# HOST TEMPLATES
#
###############################################################################
 
 
#define host {
#
#    name                            tpl-host-generic
#    use                             generic-host
#    hostgroups                      generic-remote-hosts
#    register                        0
#}
 
 
define host {
 
    name                            tpl-host-linux
    use                             linux-server
    hostgroups                      linux-hosts
    register                        0
}
 
 
define host {
 
    name                            tpl-host-windows
    use                             windows-server
    #hostgroups                      windows-servers
    hostgroups                      windows-hosts
    register                        0
}
 
 
define host {
 
    name                            tpl-host-printer
    use                             generic-printer
    hostgroups                      printer-hosts  
    register                        0
}
 
 
define host {
 
    name                            tpl-host-network
    use                             generic-switch
    hostgroups                      network-hosts
    register                        0
}

$ tree
.
├── README.md
├── in
│   ├── commands.cfg
│   ├── contacts.cfg
│   ├── localhost.cfg
│   ├── printer.yaml
│   ├── templates.cfg
│   ├── templates2.cfg
│   ├── timeperiods.cfg
│   └── windows.yaml
├── out
├── play-templating-nagios-config.yml
├── roles
│   └── nagios_mk_objects_definition
│       └── tasks
│           └── main.yml
└── template.jinja

play-templating-nagios-config.yml

#! /usr/bin/env ansible-playbook
 
---

- name: Generate Nagios objects definition conf files
  gather_facts: false
  hosts: localhost

  vars:
    line: "{{ lookup('env', 'LINE') }}"

  pre_tasks:
    - name: Assert check environment vars are correctly defined
      ansible.builtin.assert:
        that:
          - line is defined and line != ''
        msg: "Env var must be defined"

  tasks:
    - name: Copy cfg files
      ansible.builtin.copy:
        src: "{{ item }}"
        dest: "out/L{{ line }}/{{ item | basename }}"
        mode: "0644"
      with_fileglob: in/*.cfg

    - name: Loop on each yaml file
      ansible.builtin.include_role:
        name: nagios_mk_objects_definition
      vars:
        nagios_mk_objects_definition_config_file: "{{ item }}"
      with_fileglob: in/*.yaml

roles/nagios_mk_objects_definition/tasks/main.yml

---

- name: Include yaml config files
  ansible.builtin.include_vars:
    file: "{{ nagios_mk_objects_definition_config_file }}"

- name: Templating jinja files
  ansible.builtin.template:
    src: template.jinja
    dest: "out/L{{ line }}/{{ nagios_mk_objects_definition_config_file | basename | replace('.yaml', '.cfg') }}"
    mode: "0644"

template.jinja

###############################################################################
#
# HOST DEFINITIONS
#
###############################################################################
 
{% for HOST in hosts %}
{% if ( HOST.__lines is not defined ) or ( line in HOST.__lines | map('string') ) %}
# {{ HOST.__comment | d() }}
define host {
{% for k, v in HOST.items() %}
{% if not k | regex_search('__') %}
	{{ k.ljust(20) }}			{{ v }}
{% endif %}
{% endfor %}
}
 
{% endif %}
{% endfor %}
 
###############################################################################
#
# HOST GROUP DEFINITIONS
#
###############################################################################
 
{% for HOSTGROUP in hostgroups %}
{% if ( HOSTGROUP.__lines is not defined ) or ( line in HOSTGROUP.__lines | map('string') ) %}
# {{ HOSTGROUP.__comment | d() }}
define hostgroup {
{% for k, v in HOSTGROUP.items() %}
{% if not k | regex_search('__') %}
	{{ k.ljust(20) }}			{{ v }}
{% endif %}
{% endfor %}
}
 
{% endif %}
{% endfor %}
 
###############################################################################
#
# SERVICE DEFINITIONS
#
###############################################################################
 
{% for SERVICE in services %}
{% if ( SERVICE.__lines is not defined ) or ( line in SERVICE.__lines | map('string') ) %}
# {{ SERVICE.__comment | d() }}
define service {
{% for k, v in SERVICE.items() %}
{% if not k | regex_search('__') %}
	{{ k.ljust(20) }}			{{ v }}
{% endif %}
{% endfor %}
}
 
{% endif %}
{% endfor %}