Add metric for Application deletion

controllers/application_controller.go

@@ -111,6 +111,7 @@ func (r *ApplicationReconciler) Reconcile(ctx context.Context, req ctrl.Request)
 		}
 	} else {
 		if containsString(application.GetFinalizers(), appFinalizerName) {
+			metrics.ApplicationDeletionTotalReqs.Inc()
 			// A finalizer is present for the Application CR, so make sure we do the necessary cleanup steps
 			if err := r.Finalize(ctx, &application, ghClient); err != nil {
 				finalizeCounter, err := getCounterAnnotation(finalizeCount, &application)
@@ -126,6 +127,9 @@ func (r *ApplicationReconciler) Reconcile(ctx context.Context, req ctrl.Request)
 					// if fail to delete the external dependency here, log the error, but don't return error
 					// Don't want to get stuck in a cycle of repeatedly trying to delete the repository and failing
 					log.Error(err, "Unable to delete GitOps repository for application %v in namespace %v", application.GetName(), application.GetNamespace())
+
+					// Increment the Application deletion failed metric as the application delete did not fully succeed
+					metrics.ApplicationDeletionFailed.Inc()
 				}
 
 			}
@@ -134,6 +138,8 @@ func (r *ApplicationReconciler) Reconcile(ctx context.Context, req ctrl.Request)
 			controllerutil.RemoveFinalizer(&application, appFinalizerName)
 			if err := r.Update(ctx, &application); err != nil {
 				return ctrl.Result{}, err
+			} else {
+				metrics.ApplicationDeletionSucceeded.Inc()
 			}
 		}
 	}

controllers/application_controller_finalizer_test.go

@@ -22,8 +22,10 @@ import (
 
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+	"github.com/prometheus/client_golang/prometheus"
 	appstudiov1alpha1 "github.com/redhat-appstudio/application-api/api/v1alpha1"
 	cdqanalysis "github.com/redhat-appstudio/application-service/cdq-analysis/pkg"
+	"github.com/redhat-appstudio/application-service/pkg/metrics"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
 	"sigs.k8s.io/yaml"
@@ -51,6 +53,8 @@ var _ = Describe("Application controller finalizer counter tests", func() {
 		Description  = "Simple petclinic app"
 	)
 
+	prometheus.MustRegister(metrics.ApplicationDeletionTotalReqs, metrics.ApplicationDeletionFailed, metrics.ApplicationDeletionSucceeded)
+
 	Context("Delete Application CR fields with invalid devfile", func() {
 		It("Should delete successfully even when finalizer fails after 5 times", func() {
 			// Create a simple Application CR and get its devfile
@@ -90,6 +94,10 @@ var _ = Describe("Application controller finalizer counter tests", func() {
 				f := &appstudiov1alpha1.Application{}
 				return k8sClient.Get(context.Background(), hasAppLookupKey, f)
 			}, timeout, interval).ShouldNot(Succeed())
+
+			Expect(metrics.ApplicationDeletionTotalReqs).To(Equal(1))
+			Expect(metrics.ApplicationDeletionSucceeded).To(Equal(1))
+			Expect(metrics.ApplicationDeletionFailed).To(Equal(0))
 		})
 	})
 

pkg/metrics/metrics.go

@@ -76,11 +76,31 @@ var (
 		//tokenName - the name of the token being rate limited
 		[]string{"rateLimited", "tokenName"},
 	)
+
+	ApplicationDeletionTotalReqs = prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Name: "has_application_deletion_total",
+			Help: "Number of application deletion requests processed",
+		},
+	)
+	ApplicationDeletionFailed = prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Name: "has_application_failed_deletion_total",
+			Help: "Number of failed application deletion requests",
+		},
+	)
+
+	ApplicationDeletionSucceeded = prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Name: "has_application_successful_deletion_total",
+			Help: "Number of successful application deletion requests",
+		},
+	)
 )
 
 func init() {
 	// Register custom metrics with the global prometheus registry
-	metrics.Registry.MustRegister(GitOpsRepoCreationTotalReqs, GitOpsRepoCreationFailed, GitOpsRepoCreationSucceeded, ControllerGitRequest, SecondaryRateLimitCounter, PrimaryRateLimitCounter, TokenPoolGauge)
+	metrics.Registry.MustRegister(GitOpsRepoCreationTotalReqs, GitOpsRepoCreationFailed, GitOpsRepoCreationSucceeded, ControllerGitRequest, SecondaryRateLimitCounter, PrimaryRateLimitCounter, TokenPoolGauge, ApplicationDeletionTotalReqs, ApplicationDeletionSucceeded, ApplicationDeletionFailed)
 }
 
 // HandleRateLimitMetrics checks the error type to verify a primary or secondary rate limit has been encountered