add changelog and manifest

changelog/CHANGELOG.md

@@ -0,0 +1,2 @@
+### Event reporter v2.0.3
+1. Implemented a fixed window rate limiter for the event reporter to prevent the application from overflowing the entire reporter queue. This enhancement ensures timely reporting without causing delays for other applications.

event_reporter/reporter/rate_limiter_test.go

@@ -0,0 +1,46 @@
+package reporter
+
+import (
+	"testing"
+	"time"
+)
+
+func TestRateLimiter(t *testing.T) {
+	t.Run("Limiter is turned off", func(t *testing.T) {
+		rl := NewRateLimiter(&RateLimiterOpts{
+			Enabled: false,
+		})
+		d, err := rl.Limit("foo")
+		if err != nil {
+			t.Errorf("Expected no error, got %v", err)
+		}
+		if d != 0 {
+			t.Errorf("Expected 0 duration, got %v", d)
+		}
+	})
+	t.Run("Limiter is turned on", func(t *testing.T) {
+		rl := NewRateLimiter(&RateLimiterOpts{
+			Enabled:  true,
+			Rate:     time.Second,
+			Capacity: 1,
+		})
+		d, err := rl.Limit("foo")
+		if err != nil {
+			t.Errorf("Expected no error, got %v", err)
+		}
+		if d != 0 {
+			t.Errorf("Expected 0 duration, got %v", d)
+		}
+	})
+	t.Run("Limiter is turned on but with 0 capacity", func(t *testing.T) {
+		rl := NewRateLimiter(&RateLimiterOpts{
+			Enabled:  true,
+			Rate:     time.Second,
+			Capacity: 0,
+		})
+		_, err := rl.Limit("foo")
+		if err == nil {
+			t.Errorf("Expected error, got nil")
+		}
+	})
+}

manifests/base/event-reporter/event-reporter-statefulset.yaml

@@ -25,6 +25,24 @@ spec:
         args:
           - /usr/local/bin/event-reporter-server
         env:
+        - name: RATE_LIMITER_ENABLED
+          valueFrom:
+            configMapKeyRef:
+              name: argocd-cmd-params-cm
+              key: event-reporter.rate-limiter.enabled
+              optional: true
+        - name: RATE_LIMITER_BUCKET_SIZE
+          valueFrom:
+            configMapKeyRef:
+              name: argocd-cmd-params-cm
+              key: event-reporter.rate-limiter.bucket-size
+              optional: true
+        - name: RATE_LIMITER_DURATION
+          valueFrom:
+            configMapKeyRef:
+              name: argocd-cmd-params-cm
+              key: event-reporter.rate-limiter.duration
+              optional: true
         - name: EVENT_REPORTER_REPLICAS
           value: "5"
         - name: ARGOCD_TOKEN