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opensense-docs/source/development/examples/api_enable_services.rst

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=============================
API enable standard services
=============================
OPNsense contains a simple wrapper which handles standard service actions like starting and stopping services.
For this example, we assume the HelloWorld example is created and the model exists.
Prerequisites
--------------------
The HelloWorld example forms the basis for this one, please make sure you read and try it first before starting with
this one.
Configd actions
--------------------
Since the example didn't contain a service, we're going to extend the configd template first.
Edit :code:`/usr/local/opnsense/service/conf/actions.d/actions_helloworld.conf` and expand with the following sections:
::
[start]
command:exit 0
parameters:
type:script
message:hello world service start
[stop]
command:exit 0
parameters:
type:script
message:hello world service stop
[restart]
command:exit 0
parameters:
type:script
message:hello world service restart
[reload]
command:exit 0
parameters:
type:script
message:hello world service restart
[status]
command: echo "hello world is running"
parameters:
type:script_output
message:hello world service status
Next restart configd using :code:`service configd restart` and test these new calls using the following commands
::
# configctl helloworld start
OK
# configctl helloworld stop
OK
# configctl helloworld status
hello world is running
# configctl helloworld restart
OK
Our template only simulates a service, it doesn't actually do anything (:code:`exit 0`).
Update the service controller
---------------------------------
Next we change the existing controller to use :code:`ApiMutableServiceControllerBase`, which links the existing model to the service callouts defined.
The :code:`testAction` used in the HelloWorld example is left out to avoid confusion.
.. code-block:: php
:caption: /usr/local/opnsense/mvc/app/controllers/OPNsense/HelloWorld/Api/ServiceController.php
use OPNsense\Base\ApiMutableServiceControllerBase;
class ServiceController extends ApiMutableServiceControllerBase
{
protected static $internalServiceClass = '\OPNsense\HelloWorld\HelloWorld';
protected static $internalServiceTemplate = 'OPNsense/HelloWorld';
protected static $internalServiceEnabled = 'general.enabled';
protected static $internalServiceName = 'helloworld';
protected function reconfigureForceRestart()
{
return 0;
}
}
The service above defines the following static variables:
* $internalServiceClass
* reference the model class, which is used to determine if this service is enabled (links the model to the service)
* $internalServiceTemplate
* before starting the service it will call configd to generate configuration data, in this case it would execute the equivalent of :code:`configctl template reload OPNsense/HelloWorld` on the console
* $internalServiceEnabled
* Which section of the model contains a boolean defining if the service is enabled (general.enabled)
* $internalServiceName
* refers to the action template, where it can find start/stop/restart/status/reload actions (actions_helloworld.conf)
The :code:`reconfigureForceRestart` overwrite tells the controller if it should always stop the service before trying a start, some
services can be signaled to do a reconfigure without stopping.
Endpoints
---------------------------------
When deploying this controller into the HelloWorld module it would expose the following endpoints
.. csv-table::
:header: "Method", "Endpoint"
:widths: 4, 100
"``POST``","/api/helloworld/service/stop"
"``POST``","/api/helloworld/service/start"
"``POST``","/api/helloworld/service/restart"
"``POST``","/api/helloworld/service/reconfigure"
"``GET``","/api/helloworld/service/status"