Question

我正在使用节点js尝试在kubernetes集群环境中运行grpc。没有kubernetes的localy可以正常工作。服务器端正在监听'0.0.0.0:80'，客户端尝试通过http://recommended-upgrades-qa-int连接。在kuberenets中，我得到以下错误：

ERROR failed to get via grpc the getRecommended Error: 14 UNAVAILABLE: Connect Failed endpoint:http://<K8S_SERVICE_NAME>
ERROR: Recommendations fetch error: Error: 14 UNAVAILABLE: Connect Failed severity=error, message=failed to get via grpc the getRecommended Error: 14 UNAVAILABLE: Connect Failed endpoint:http://<K8S_SERVICE_NAME>

服务器端：

const connectionHost = this.listenHost + ':' + this.listenPort;
server.bind(connectionHost, grpc.ServerCredentials.createInsecure());
logger.info(`Server running at ${connectionHost}`);
server.start();

客户端：

RecommendedService = grpc.load(__dirname + '/../../node_modules/@zerto/lib-service-clients/Output/sources/recommendedClient.proto').RecommendedService;
        } catch (error){
            console.log(error);
        }

        this.client = RecommendedService && new RecommendedService(grpcAddress, grpc.credentials.createInsecure());

制造者档案：

服务器端

apiVersion: apps/v1
kind: Deployment
metadata:
  name: server-side-deployment
  namespace: default
spec:
  selector:
    matchLabels:
      app: server-side-deployment
  replicas: 1
  template:
    metadata:
      labels:
        app: server-side-deployment
    spec:
      containers:
      - name: server-side-deployment
        image: (DOCKER_IMAGE_PATH)
        imagePullPolicy: Always
        ports:
        - containerPort: 80

---
apiVersion: v1
kind: Service
metadata:
  name: recommended-upgrades-qa-int
  namespace: default
spec:
  selector:
      app: server-side-deployment
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
      name: http

客户端

apiVersion: apps/v1
kind: Deployment
metadata:
  name: client-side-deployment
  namespace: default
spec:
  selector:
    matchLabels:
      app: client-side-deployment
  replicas: 1
  template:
    metadata:
      labels:
        app: client-side-deployment
    spec:
      containers:
      - name: client-side-deployment
        image: (DOCKER_IMAGE_PATH)
        imagePullPolicy: Always
        env:
          - name: RECOMANDED_SERVICE
            value: http://recommended-upgrades-qa-int
        ports:
        - containerPort: 80

Answer 1

来自docs：

为“普通”（非无头）服务分配了DNS A记录，该记录的格式为my-svc.my-namespace.svc.cluster.local。这将解析为服务的群集IP。

您的问题可能是在服务位于另一个命名空间中时发出的<service name>。尝试使用：

<service name>.<service namespace>.svc.cluster.local

Answer 2

看来我们知道了。首先，URL必须包含端口80，而且服务器服务中存在内部未捕获的异常，这可能导致其无法正常工作。谢谢大家

k8s中的grpc无法解析服务DNS名称

服务器端

客户端

2 个答案: