import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.kubernetes.commons.KubernetesDiscoveryClient;
public class KubernetesDiscoveryExample {
private final DiscoveryClient discoveryClient;
public KubernetesDiscoveryExample(DiscoveryClient discoveryClient) {
this.discoveryClient = discoveryClient;
}
public void printServiceInstances() {
// 获取所有服务的名称
List<String> services = discoveryClient.getServices();
System.out.println("Available services: " + services);
// 获取特定服务的所有实例
for (String service : services) {
List<ServiceInstance> instances = discoveryClient.getInstances(service);
for (ServiceInstance instance : instances) {
System.out.println("Service: " + service + " - Instance: " + instance.getUri());
}
}
}
public static void main(String[] args) {
// 假设Spring应用已经配置了DiscoveryClient
DiscoveryClient discoveryClient = new KubernetesDiscoveryClient();
KubernetesDiscoveryExample example = new KubernetesDiscoveryExample(discoveryClient);
example.printServiceInstances();
}
}这段代码演示了如何使用Spring Cloud Kubernetes的KubernetesDiscoveryClient来获取Kubernetes环境中服务的实例信息。它首先获取所有服务的名称，然后遍历每个服务，打印出该服务的所有实例的URI。这个例子简单直观地展示了如何在Spring Cloud应用中集成Kubernetes的服务发现功能。