[MGDSTRM-10786] Disable java-operator-sdk controller metrics by default

Signed-off-by: Michael Edgar <[email protected]>

operator/src/main/java/org/bf2/operator/controllers/DisabledOperatorSdkMetrics.java

@@ -0,0 +1,24 @@
+package org.bf2.operator.controllers;
+
+import io.javaoperatorsdk.operator.api.monitoring.Metrics;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.binder.MeterBinder;
+import io.quarkus.arc.properties.UnlessBuildProperty;
+
+import javax.inject.Singleton;
+
+/**
+ * Implementation of the java-operator-sdk {@link Metrics} interface that does
+ * will not add the SDK's reconcile/event metrics to the Micrometer registry. This
+ * avoids a problem where the SDK's metrics accumulate and result in an OOM situation
+ * during scraping of the `/metrics` end-point.
+ */
+@Singleton
+@UnlessBuildProperty(name = "managedkafka.operator-sdk.default-metrics", stringValue = "true", enableIfMissing = true)
+public class DisabledOperatorSdkMetrics implements Metrics, MeterBinder {
+
+    @Override
+    public void bindTo(MeterRegistry meterRegistry) {
+        // Do nothing with the registry
+    }
+}