Créer un module (tutoriel)

Il s'agit d'un didacticiel étape par étape qui montre comment créer un module frontal Zabbix simple. Vous pouvez télécharger tous les fichiers de ce module sous forme d'archive ZIP : MyAddress.zip.

Ce que vous construirez

Au cours de ce didacticiel, vous allez d'abord créer un module frontend qui ajoute une nouvelle section de menu Mon adresse puis convertit en un module frontal plus avancé qui envoie une requête HTTP à https://api.seeip.org et affiche la réponse - l'adresse IP de votre ordinateur - sur une nouvelle page dans la section de menu Mon adresse nouvellement créée. Voici à quoi ressemblera le module fini :

Partie I - Nouvelle section de menu

Register the module

1. Create a new directory MyAddress in zabbix/ui/modules.

2. Add manifest.json file with basic module metadata (see the description of supported parameters).

ui/modules/MyAddress/manifest.json

{
           "manifest_version": 2.0,
           "id": "my-address",
           "name": "My IP Address",
           "version": "1.0",
           "namespace": "MyAddress",
           "description": "My External IP Address"
       }

3. In Zabbix frontend, go to Administration→General→Modules section and press Scan directory button.

4. Locate a new module My IP Address in the list and change the module's status from Disabled to Enabled (click on the Disabled hyperlink in the Status column).

The module is now registered in the frontend, but it is not visible anywhere, because you haven't defined any module functionality yet. Once you add content to the module directory, you will see the changes in Zabbix frontend immediately upon refreshing the page.

Create a menu entry

1. To add a new menu entry to the frontend, create Module.php file inside the directory MyAddress.

This file implements a new class Module that extends the default CModule class. Class Module takes the pointer to the main menu and inserts a new menu entry called My Address.

setAction() method specifies an action to be executed upon clicking on the menu entry. To start with, use the predefined action userprofile.edit, which will open the User profile page. In part III of this tutorial you will learn how to create a custom action.

ui/modules/MyAddress/Module.php

<?php
       
       namespace Modules\MyAddress;
       
       use Zabbix\Core\CModule;
       use APP;
       use CMenuItem;
       
       class Module extends CModule
       {
               public function init(): void
               {
                   APP::Component()->get('menu.main')
                       ->add((new CMenuItem(_('My Address')))
                       ->setAction('userprofile.edit'));
               }
       }

3. Refresh Zabbix frontend. There is now a new entry My Address at the bottom of the main Zabbix menu. Click on My Address to open the User profile page.

Part II - Menu entry location change

In this section, you will move the menu entry My Address to the Monitoring section. Now users will be able to access their user profile information from the Monitoring submenu.

1. Open and edit Module.php file.

ui/modules/MyAddress/Module.php

<?php
       
       namespace Modules\MyAddress;
       
       use Zabbix\Core\CModule;
       use APP;
       use CMenuItem;
       
       
       class Module extends CModule 
       {
           public function init(): void {
               APP::Component()->get('menu.main')
                   ->findOrAdd(_('Monitoring'))
                       ->getSubmenu()
                           ->insertAfter(_('Discovery'),((new CMenuItem(_('My Address')))
                               ->setAction('userprofile.edit'))
                           );
           }
       }

2. Refresh Zabbix frontend. Expand Monitoring menu section and observe that My address is now located below Discovery section.

Part III - Module action

An action is implemented in 2 files: one takes care of the business logic implementation and another one is responsible for the view. The action logic will be defined in the MyAddress class in the file actions/MyAddress.php and the view will be defined in the file views/my.address.php.

1. Add a directory actions to MyAddress.

2. Create MyAddress.php file inside the actions directory and define an action class MyAddress.

This action class will implement four functions: init(), checkInput(), checkPermissions(), doAction(). Zabbix frontend calls the doAction() function when the action is requested. This function is responsible for the business logic of the module.

ui/modules/MyAddress/actions/MyAddress.php

<?php
       
       namespace Modules\MyAddress\Actions;
       
       use CControllerResponseData;
       use CController;
       
       class MyAddress extends CController
       {
           public function init(): void {$this->disableCsrfValidation();}
           protected function checkInput(): bool {return true;}
           protected function checkPermissions(): bool {return true;}
       
           protected function doAction(): void
           {
               $data = ['my-ip' => file_get_contents("https://api.ipify.org")];
               $response = new CControllerResponseData($data);
               $this->setResponse($response);
           }
       }

3. Add a directory views to the MyAddress.

4. Create my.address.php file inside the views directory and define the module view.

Note that the variable $data is available in the view without specifically defining it. The framework automatically passes associated array to the view.

ui/modules/MyAddress/views/my.address.php

<?php
       
       (new CHtmlPage())
           ->setTitle(_('The HTML Title of My Address Page'))
           ->addItem(new CDiv($data['my-ip']))
           ->show();

5. The action has to be registered in the manifest.json. Open manifest.json and add a new object actions containing:

• action key - action name written in lowercase [a-z] with words separated by dots (in this tutorial, my.address).
• action class name (MyAddress) under the class key of the my.address object.
• action view name (my.address) under the view key of the my.address object.

ui/modules/MyAddress/manifest.json

{
           "manifest_version": 2.0,
           "id": "my-address",
           "name": "My IP Address",
           "version": "1.0",
           "namespace": "MyAddress",
           "description": "My External IP Address",
           "actions": {
               "my.address": {
                   "class": "MyAddress",
                   "view": "my.address"
               }
           }
       }

6. Open Module.php and change the action name in the setAction() method to my.address.

ui/modules/MyAddress/Module.php

<?php
       
       namespace Modules\MyAddress;
       
       use Zabbix\Core\CModule;
       use APP;
       use CMenuItem;
       
       
       class Module extends CModule 
       {
           public function init(): void {
               APP::Component()->get('menu.main')
                   ->findOrAdd(_('Monitoring'))
                       ->getSubmenu()
                           ->insertAfter(_('Discovery'),((new CMenuItem(_('My Address')))
                               ->setAction('my.address'))
                           );
           }
       }

7. Refresh Zabbix frontend. Click on the "My address" menu entry to see the IP address of your computer.