Fix logger in OTEL collector (kedacore#5095)

Signed-off-by: Zbynek Roubalik <zroubalik@gmail.com>

CHANGELOG.md

@@ -81,6 +81,7 @@ New deprecation(s):
 ### Other
 
 - **General**: Fix CVE-2023-45142 in Opentelemetry ([#5089](https://github.com/kedacore/keda/issues/5089))
+- **General**: Fix logger in Opentelemetry collector ([#5094](https://github.com/kedacore/keda/issues/5094))
 
 ## v2.12.0
 

pkg/metricscollector/opentelemetry.go

@@ -16,7 +16,7 @@ import (
 	"github.com/kedacore/keda/v2/version"
 )
 
-var otLog = logf.Log.WithName("prometheus_server")
+var otLog = logf.Log.WithName("otel_collector")
 
 const meterName = "keda-open-telemetry-metrics"
 const defaultNamespace = "default"
@@ -91,7 +91,7 @@ func (o *OtelMetrics) RecordScalerMetric(namespace string, scaledObject string,
 		api.WithFloat64Callback(cback),
 	)
 	if err != nil {
-		fmt.Println("failed to register scaler metrics value")
+		otLog.Error(err, "failed to register scaler metrics value", "namespace", namespace, "scaledObject", scaledObject, "scaler", scaler, "scalerIndex", scalerIndex, "metric", metric)
 	}
 }
 
@@ -107,7 +107,7 @@ func (o *OtelMetrics) RecordScalerLatency(namespace string, scaledObject string,
 		api.WithFloat64Callback(cback),
 	)
 	if err != nil {
-		fmt.Println("failed to register scaler metrics latency")
+		otLog.Error(err, "failed to register scaler metrics latency", "namespace", namespace, "scaledObject", scaledObject, "scaler", scaler, "scalerIndex", scalerIndex, "metric", metric)
 	}
 }
 
@@ -133,7 +133,7 @@ func (o *OtelMetrics) RecordScalableObjectLatency(namespace string, name string,
 		api.WithFloat64Callback(cback),
 	)
 	if err != nil {
-		fmt.Println("failed to register internal scale loop latency")
+		otLog.Error(err, "failed to register internal scale loop latency", "namespace", namespace, resourceType, name)
 	}
 }
 
@@ -154,7 +154,7 @@ func (o *OtelMetrics) RecordScalerActive(namespace string, scaledObject string,
 		api.WithFloat64Callback(cback),
 	)
 	if err != nil {
-		fmt.Println("failed to register internal scale loop latency")
+		otLog.Error(err, "failed to register scaler activity", "namespace", namespace, "scaledObject", scaledObject, "scaler", scaler, "scalerIndex", scalerIndex, "metric", metric)
 	}
 }
 
@@ -197,7 +197,7 @@ func (o *OtelMetrics) RecordBuildInfo() {
 		api.WithInt64Callback(cback),
 	)
 	if err != nil {
-		fmt.Println("failed to register scaler metrics value")
+		otLog.Error(err, "failed to register build info")
 	}
 }