编写启动类

public class ConsumerBootstrap {

    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ConsumerConfiguration.class);
        context.start();
        GreetingServiceConsumer greetingServiceConsumer = context.getBean(GreetingServiceConsumer.class);
        while (true) {
            try {
                String hello = greetingServiceConsumer.doSayHello("xDS Consumer");
                System.out.println("result: " + hello);
                Thread.sleep(100);
            } catch (Throwable t) {
                t.printStackTrace();
            }
        }
    }

    @Configuration
    @EnableDubbo(scanBasePackages = "org.apache.dubbo.samples.action")
    @PropertySource("classpath:/spring/dubbo-consumer.properties")
    @ComponentScan(value = {"org.apache.dubbo.samples.action"})
    static class ConsumerConfiguration {

    }
}

编写配置信息

dubbo.application.name=dubbo-samples-xds-consumer
dubbo.application.metadataServicePort=20885
dubbo.registry.address=xds://istiod.istio-system.svc:15012
dubbo.consumer.timeout=3000
dubbo.consumer.check=false
dubbo.application.qosEnable=true
dubbo.application.qosAcceptForeignIp=true

编写Deployment.yml和Service.yml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: dubbo-samples-xds-consumer
  namespace: dubbo-demo
spec:
  replicas: 2
  selector:
    matchLabels:
      app: dubbo-samples-xds-consumer
  template:
    metadata:
      labels:
        app: dubbo-samples-xds-consumer
    spec:
      containers:
        - name: server
          image: apache/dubbo-demo:dubbo-samples-xds-consumer_0.0.1
          livenessProbe:
            httpGet:
              path: /live
              port: 22222
            initialDelaySeconds: 5
            periodSeconds: 5
          readinessProbe:
            httpGet:
              path: /ready
              port: 22222
            initialDelaySeconds: 5
            periodSeconds: 5
          startupProbe:
            httpGet:
              path: /startup
              port: 22222
            failureThreshold: 30
            periodSeconds: 10

apiVersion: v1
kind: Service
metadata:
  name: dubbo-samples-xds-consumer
  namespace: dubbo-demo
spec:
  clusterIP: None
  selector:
    app: dubbo-samples-xds-consumer
  ports:
    - name: grpc
      protocol: TCP
      port: 50051
      targetPort: 50051

编写Dockerfile

FROM openjdk:8-jdk
ADD ./target/dubbo-samples-xds-consumer-1.0-SNAPSHOT.jar dubbo-samples-xds-consumer-1.0-SNAPSHOT.jar
CMD java -jar -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=31000 /dubbo-samples-xds-consumer-1.0-SNAPSHOT.jar

? 到目前为止我们的环境和代码就全都准备完毕了！

构建镜像

1、启动docker

2、启动minikube

因为minikube是一个本地的k8s，他启动需要一个虚拟引擎，这里我们用docker来管理。我们通过如下命令启动

minikube start

我们可以在docker里看到minikube

3、检查istio的状态

4、构建镜像

在本地找到代码所在位置、依次执行以下命令

# 找到provider所在路径
cd ./dubbo-samples-xds-provider/
# 构建provider的镜像
docker build -t apache/dubbo-demo:dubbo-samples-xds-provider_0.0.1 .

# 找到consumer所在路径
cd ../dubbo-samples-xds-consumer/
# 构建consumer的镜像
docker build -t apache/dubbo-demo:dubbo-samples-xds-consumer_0.0.1 .

5、检查本地镜像

6、创建namespace