Eureka Server - 列出所有注冊的實例

Question

我有一個 Spring Boot 應用程序，它也是一個 Eureka 服務器。 我想列出所有已經注冊到這個 Eureka Server 的實例。 我該怎么做？

Answer 1

使用EurekaServerContextHolder.getInstance().getServerContext().getRegistry()獲取registry然后使用registry列出所有Applications

PeerAwareInstanceRegistry registry = EurekaServerContextHolder.getInstance().getServerContext().getRegistry();
    Applications applications = registry.getApplications();

    applications.getRegisteredApplications().forEach((registeredApplication) -> {
        registeredApplication.getInstances().forEach((instance) -> {
            System.out.println(instance.getAppName() + " (" + instance.getInstanceId() + ") : " + response);
        });
    });

Answer 2

如果您想獲得所有已注冊的應用程序。

1. 需要開啟eureka的配置。

    eureka: client: serviceUrl: defaultZone: http://localhost:8761/eureka/ #register eureka as application register-with-eureka: true #fetch all thing, we can get applications here fetch-registry: true #also you can specify the instance renewal time. server: enable-self-preservation: false

2. 現在我們可以獲取已注冊的應用程序，但該類必須放在 eureka 應用程序的包中。 [因為我們需要自動裝配 PeerAwareInstanceRegistry]

@Autowired
PeerAwareInstanceRegistry registry;

public void eurekaApplications() {
    Applications applications = registry.getApplications();
    //TODO add your code here.
}

Answer 3

這對我有用，在 eureka 上注冊所有服務並顯示每個服務的信息

@Autowired
private DiscoveryClient discoveryClient;

public List<ServiceInstance> getApplications() {

    List<String> services = this.discoveryClient.getServices();
    List<ServiceInstance> instances = new ArrayList<ServiceInstance>();
    services.forEach(serviceName -> {
        this.discoveryClient.getInstances(serviceName).forEach(instance ->{
            instances.add(instance);
        });
    });
    return instances;
}