[RFC-0008] Custom Event Metadata from Annotations

apis/event/v1beta1/event.go

@@ -21,6 +21,9 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
+// Group is the API Group for the Event API.
+const Group = "event.toolkit.fluxcd.io"
+
 // These constants define valid event severity values.
 const (
 	// EventSeverityTrace represents a trace event, usually

runtime/events/recorder.go

@@ -21,9 +21,11 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"maps"
 	"net/http"
 	"net/url"
 	"os"
+	"strings"
 	"time"
 
 	"github.com/go-logr/logr"
@@ -145,7 +147,7 @@ func (r *Recorder) Eventf(object runtime.Object, eventtype, reason, messageFmt s
 // It also logs the event if debug logs are enabled in the logger.
 func (r *Recorder) AnnotatedEventf(
 	object runtime.Object,
-	annotations map[string]string,
+	inputAnnotations map[string]string,
 	eventtype, reason string,
 	messageFmt string, args ...interface{}) {
 
@@ -154,6 +156,16 @@ func (r *Recorder) AnnotatedEventf(
 		r.Log.Error(err, "failed to get object reference")
 	}
 
+	// Add object annotations to the annotations.
+	annotations := maps.Clone(inputAnnotations)
+	if annotatedObject, ok := object.(interface{ GetAnnotations() map[string]string }); ok {
+		for k, v := range annotatedObject.GetAnnotations() {
+			if strings.HasPrefix(k, eventv1.Group+"/") {
+				annotations[k] = v
+			}
+		}
+	}
+
 	// Add object info in the logger.
 	log := r.Log.WithValues("name", ref.Name, "namespace", ref.Namespace, "reconciler kind", ref.Kind)
 

runtime/events/recorder_test.go

@@ -25,48 +25,91 @@ import (
 
 	"github.com/stretchr/testify/require"
 	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
 	ctrl "sigs.k8s.io/controller-runtime"
 
 	eventv1 "github.com/fluxcd/pkg/apis/event/v1beta1"
 )
 
 func TestEventRecorder_AnnotatedEventf(t *testing.T) {
-	requestCount := 0
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		requestCount++
-		b, err := io.ReadAll(r.Body)
-		require.NoError(t, err)
-
-		var payload eventv1.Event
-		err = json.Unmarshal(b, &payload)
-		require.NoError(t, err)
-
-		require.Equal(t, "ConfigMap", payload.InvolvedObject.Kind)
-		require.Equal(t, "webapp", payload.InvolvedObject.Name)
-		require.Equal(t, "gitops-system", payload.InvolvedObject.Namespace)
-		require.Equal(t, "true", payload.Metadata["test"])
-		require.Equal(t, "sync", payload.Reason)
-
-	}))
-	defer ts.Close()
-
-	eventRecorder, err := NewRecorder(env, ctrl.Log, ts.URL, "test-controller")
-	require.NoError(t, err)
-
-	obj := &corev1.ConfigMap{}
-	obj.Namespace = "gitops-system"
-	obj.Name = "webapp"
-
-	meta := map[string]string{
-		"test": "true",
+	for _, tt := range []struct {
+		name             string
+		object           runtime.Object
+		expectedMetadata map[string]string
+	}{
+		{
+			name: "event with ConfigMap",
+			object: &corev1.ConfigMap{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "webapp",
+					Namespace: "gitops-system",
+					Annotations: map[string]string{
+						"event.toolkit.fluxcd.io/deploymentID": "e076e315-5a48-41c3-81c8-8d8bdee7d74d",
+						"event.toolkit.fluxcd.io/image":        "ghcr.io/stefanprodan/podinfo:6.5.0",
+					},
+				},
+			},
+			expectedMetadata: map[string]string{
+				"test":                                 "true",
+				"event.toolkit.fluxcd.io/deploymentID": "e076e315-5a48-41c3-81c8-8d8bdee7d74d",
+				"event.toolkit.fluxcd.io/image":        "ghcr.io/stefanprodan/podinfo:6.5.0",
+			},
+		},
+		{
+			name: "event with ObjectReference for ConfigMap (does not panic with runtime.Object without annotations)",
+			object: &corev1.ObjectReference{
+				Name:      "webapp",
+				Namespace: "gitops-system",
+				Kind:      "ConfigMap",
+			},
+			expectedMetadata: map[string]string{
+				"test": "true",
+			},
+		},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			requestCount := 0
+			ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				requestCount++
+				b, err := io.ReadAll(r.Body)
+				require.NoError(t, err)
+
+				var payload eventv1.Event
+				err = json.Unmarshal(b, &payload)
+				require.NoError(t, err)
+
+				require.Equal(t, "ConfigMap", payload.InvolvedObject.Kind)
+				require.Equal(t, "webapp", payload.InvolvedObject.Name)
+				require.Equal(t, "gitops-system", payload.InvolvedObject.Namespace)
+				require.Equal(t, "sync", payload.Reason)
+				require.Equal(t, "sync object", payload.Message)
+
+				for k, v := range tt.expectedMetadata {
+					require.Equal(t, v, payload.Metadata[k])
+				}
+			}))
+			defer ts.Close()
+
+			eventRecorder, err := NewRecorder(env, ctrl.Log, ts.URL, "test-controller")
+			require.NoError(t, err)
+
+			obj := tt.object
+
+			meta := map[string]string{
+				"test": "true",
+			}
+
+			const msg = "sync object"
+
+			eventRecorder.AnnotatedEventf(obj, meta, corev1.EventTypeNormal, "sync", "%s", msg)
+			require.Equal(t, 2, requestCount)
+
+			// When a trace event is sent, it's dropped, no new request.
+			eventRecorder.AnnotatedEventf(obj, meta, eventv1.EventTypeTrace, "sync", "%s", msg)
+			require.Equal(t, 2, requestCount)
+		})
 	}
-
-	eventRecorder.AnnotatedEventf(obj, meta, corev1.EventTypeNormal, "sync", "sync %s", obj.Name)
-	require.Equal(t, 2, requestCount)
-
-	// When a trace event is sent, it's dropped, no new request.
-	eventRecorder.AnnotatedEventf(obj, meta, eventv1.EventTypeTrace, "sync", "sync %s", obj.Name)
-	require.Equal(t, 2, requestCount)
 }
 
 func TestEventRecorder_AnnotatedEventf_Retry(t *testing.T) {