Disable actuator instrumentation by default (#10394)

Author: laurit

instrumentation/spring/spring-boot-actuator-autoconfigure-2.0/javaagent/build.gradle.kts

@@ -23,6 +23,8 @@ tasks.withType<Test>().configureEach {
   // required on jdk17
   jvmArgs("--add-opens=java.base/java.lang=ALL-UNNAMED")
   jvmArgs("-XX:+IgnoreUnrecognizedVMOptions")
+
+  jvmArgs("-Dotel.instrumentation.spring-boot-actuator-autoconfigure.enabled=true")
 }
 
 val latestDepTest = findProperty("testLatestDeps") as Boolean

instrumentation/spring/spring-boot-actuator-autoconfigure-2.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/spring/actuator/v2_0/SpringBootActuatorInstrumentationModule.java

@@ -15,6 +15,7 @@
 import io.opentelemetry.javaagent.extension.instrumentation.internal.ExperimentalInstrumentationModule;
 import io.opentelemetry.javaagent.extension.instrumentation.internal.injection.ClassInjector;
 import io.opentelemetry.javaagent.extension.instrumentation.internal.injection.InjectionMode;
+import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
 import java.util.List;
 import net.bytebuddy.matcher.ElementMatcher;
 
@@ -62,4 +63,10 @@ public void injectClasses(ClassInjector injector) {
   public List<TypeInstrumentation> typeInstrumentations() {
     return singletonList(new AutoConfigurationImportSelectorInstrumentation());
   }
+
+  @Override
+  public boolean defaultEnabled(ConfigProperties config) {
+    // produces a lot of metrics that are already captured - e.g. JVM memory usage
+    return false;
+  }
 }