Added k8s health checks and metrics scraping

config/routes.php

@@ -7,6 +7,7 @@ use FastRoute\RouteCollector;
 // Pages
 $route->get('/', 'HomeController@index');
 $route->get('/credits', 'CreditsController@index');
+$route->get('/health', 'HealthController@index');
 
 // Authentication
 $route->get('/login', 'AuthController@login');

deployment.tpl.yaml

@@ -150,6 +150,10 @@ spec:
           env:
             - name: PHP_FPM_HOST
               value: localhost
+          livenessProbe:
+            httpGet:
+              path: /health
+              port: 80
 
 ---
 apiVersion: v1
@@ -160,6 +164,9 @@ metadata:
     app: <CI_PROJECT_PATH_SLUG>
     environment: <CI_ENVIRONMENT_SLUG>
     commit: <CI_COMMIT_SHORT_SHA>
+  annotations:
+    prometheus.io/port: '80'
+    prometheus.io/scrape: 'true'
 spec:
   type: ClusterIP
   ports:

src/Controllers/HealthController.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Engelsystem\Controllers;
+
+use Engelsystem\Http\Response;
+
+class HealthController extends BaseController
+{
+    /** @var Response */
+    protected $response;
+
+    /**
+     * @param Response $response
+     */
+    public function __construct(Response $response)
+    {
+        $this->response = $response;
+    }
+
+    /**
+     * @return Response
+     */
+    public function index(): Response
+    {
+        return $this->response->withContent('Ok');
+    }
+}

src/Middleware/SessionHandlerServiceProvider.php

@@ -15,6 +15,7 @@ class SessionHandlerServiceProvider extends ServiceProvider
                 return [
                     '/api',
                     '/atom',
+                    '/health',
                     '/ical',
                     '/metrics',
                     '/shifts-json-export',

tests/Unit/Controllers/HealthControllerTest.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Controllers;
+
+use Engelsystem\Controllers\HealthController;
+use Engelsystem\Http\Response;
+use Engelsystem\Test\Unit\TestCase;
+use PHPUnit\Framework\MockObject\MockObject;
+
+class HealthControllerTest extends TestCase
+{
+    /**
+     * @covers \Engelsystem\Controllers\HealthController::__construct
+     * @covers \Engelsystem\Controllers\HealthController::index
+     */
+    public function testIndex()
+    {
+        /** @var Response|MockObject $response */
+        $response = $this->createMock(Response::class);
+        $this->setExpects($response, 'withContent', ['Ok'], $response);
+
+        $controller = new HealthController($response);
+        $controller->index();
+    }
+}