Adding event listener to close fabric 8 clients

Author: ryanjbaxter

spring-cloud-kubernetes-fabric8-autoconfig/src/main/java/org/springframework/cloud/kubernetes/fabric8/Fabric8AutoConfiguration.java

@@ -23,14 +23,19 @@
 import io.fabric8.kubernetes.client.KubernetesClient;
 import io.fabric8.kubernetes.client.KubernetesClientBuilder;
 
+import org.springframework.beans.factory.BeanFactoryUtils;
 import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnCloudPlatform;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.cloud.CloudPlatform;
 import org.springframework.cloud.kubernetes.commons.KubernetesClientProperties;
 import org.springframework.cloud.kubernetes.commons.KubernetesCommonsAutoConfiguration;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationListener;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.context.event.ContextClosedEvent;
+import org.springframework.context.event.EventListener;
 
 /**
  * Auto configuration for Kubernetes.
@@ -117,4 +122,11 @@ public Fabric8PodUtils kubernetesPodUtils(KubernetesClient client) {
 		return new Fabric8PodUtils(client);
 	}
 
+	@EventListener
+	public void onContextClosed(ContextClosedEvent event) {
+		ApplicationContext context = event.getApplicationContext();
+		BeanFactoryUtils.beansOfTypeIncludingAncestors(context, KubernetesClient.class).values()
+				.forEach(c -> c.close());
+	}
+
 }