问Kubernetes:位于不同吊舱的集装箱之间的通信
EN

Stack Overflow用户

提问于 2019-03-21 08:05:57

回答 2查看 2.1K关注 0票数 1

我有两个通过http协议进行通信的微服务。

AC6K:从Atlas Copco 6000设备获取数据的C#微服务。
LocalWriter:从AC6K获取数据并将信息存储在数据库中的python应用程序

我已经在Windows和Linux环境中测试过它，它运行得很好。当我尊重每个微服务并进行部署时，就没有通信了。随函附上用于封装和部署应用程序的相应docker & yaml文件。

ac6k停靠文件：

FROM microsoft/aspnetcore-build

EXPOSE 5010

WORKDIR /app

COPY . .

RUN dotnet restore

ENTRYPOINT ["dotnet", "ac6kcore.dll"]




-  ac6kUp.yaml

    apiVersion: v1
    kind: Service
    metadata:
      name: ac6kcore
      labels:
        run: ac6kcore  
    spec:
      type: NodePort
      ports: 
      - port: 5010
        name: ac6kcore
        targetPort: 5010
        nodePort: 32766
        protocol: TCP
      selector:
        run: ac6kcore
    ---
    apiVersion: extensions/v1beta1
    kind: Deployment
    metadata:
      name: ac6kcore
    spec:
      selector:
        matchLabels:
          run: ac6kcore
      replicas: 1
      template:
        metadata:
          labels:
            run: ac6kcore
        spec:
          hostNetwork: true
          containers:
          - image: afierro/ac6kcore:lw
            name: ac6kcore
            ports:
            - containerPort: 5010
          restartPolicy: Always

本地作家停靠文件：

FROM python:3.6

RUN mkdir -p /mongodbapp

WORKDIR /mongodbapp

COPY requirements.txt /mongodbapp

RUN pip install --no-cache-dir -r requirements.txt

ADD . /mongodbapp

EXPOSE 9090

CMD ["python", "runapp.py"]

- LocalWriter.yaml

apiVersion: v1
kind: Service
metadata:
  annotations:
    service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
  name: localwriter
  labels:
    app: localwriter
spec:
  type: NodePort
  ports:
  - port: 9090
    name: localwriter
    targetPort: 9090
    nodePort: 32756
    protocol: TCP
  selector:
    app: localwriter
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: localwriter
spec:
  replicas: 1
  selector:
    matchLabels:
      app: localwriter
  template:
    metadata:
      labels:
        app: localwriter
    spec:
      containers:
      - name: flasknode
        image: afierro/localwriter:v1
        imagePullPolicy: Always
        ports:
        - containerPort: 9090

提前感谢

kubernetes

containers

microservices

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回答 2

Stack Overflow用户

发布于 2019-03-21 08:27:54

您可以使用服务将一个部署中的吊舱与另一个部署中的吊舱进行通信。

在此查询服务：

https://kubernetes.io/docs/concepts/services-networking/service/

确保服务中有正确的选择器。

您可以使用内部的env调用其他服务。Kubernetes以env的形式使用服务ip和端口启动荚，要检查这一点，您可以在荚中使用printenv命令。

票数 1

Stack Overflow用户

发布于 2019-03-22 01:28:41

根据的建议，我输入了以下命令来查看环境变量，结果在我看来是多余的。

kubectl get pods

NAME                           READY   STATUS    RESTARTS   AGE
ac6kcore-77bc4c4987-dxn29      1/1     Running   0          14m
localwriter-55467c5495-px8m4   1/1     Running   0          14m
mongo                          1/1     Running   0          14m

kubectl exec ac6kcore-77bc4c4987-dxn29 -- printenv | grep SERVICE   

AC6KCORE_SERVICE_PORT_AC6KCORE=5010
KUBERNETES_SERVICE_HOST=10.96.0.1
KUBERNETES_SERVICE_PORT_HTTPS=443
AC6KCORE_SERVICE_PORT=5010
AC6KCORE_SERVICE_HOST=10.107.208.212
LOCALWRITER_SERVICE_HOST=10.100.103.114
LOCALWRITER_SERVICE_PORT=9090
LOCALWRITER_SERVICE_PORT_LOCALWRITER=9090
KUBERNETES_SERVICE_PORT=443

kubectl exec localwriter-55467c5495-px8m4 -- printenv | grep SERVICE    

KUBERNETES_SERVICE_HOST=10.96.0.1
LOCALWRITER_SERVICE_PORT_LOCALWRITER=9090
AC6KCORE_SERVICE_PORT_AC6KCORE=5010
KUBERNETES_SERVICE_PORT=443
AC6KCORE_SERVICE_HOST=10.107.208.212
LOCALWRITER_SERVICE_PORT=9090
KUBERNETES_SERVICE_PORT_HTTPS=443
AC6KCORE_SERVICE_PORT=5010
LOCALWRITER_SERVICE_HOST=10.100.103.114