如何在 Kubernetes 中使用负载均衡器服务公开多个端口 [英] How to expose multiple port using a load balancer services in Kubernetes

问题描述

我已经使用谷歌云平台(容器引擎)创建了一个集群，并使用以下 YAML 文件部署了一个 pod:

I have created a cluster using the google cloud platform (container engine) and deployed a pod using the following YAML file:

apiVersion: extensions/v1beta1
kind: Deployment
metadata: 
  name: deployment-name
spec:
  replicas: 1
  template:
    metadata:
      name: pod-name
      labels: 
        app: app-label
    spec:
      containers: 
      - name: container-name
      image: gcr.io/project-id/image-name
      resources:
        requests:
          cpu: 1
      ports:
      - name: port80
        containerPort: 80
      - name: port443
        containerPort: 443
      - name: port6001
        containerPort: 6001

然后我想创建一个服务，使 pod 能够侦听所有这些端口.我知道以下 YAML 文件可用于创建在一个端口上侦听的服务:

Then I want to create a service that enables the pod to listen on all these ports. I know that the following YAML file works to create a service that listens on one port:

apiVersion: v1
kind: Service
metadata: 
  name: service-name
spec:    
  ports:
  - port: 80
    targetPort: 80
  selector: 
    app: app-label
  type: LoadBalancer

但是，当我希望 pod 像这样侦听多个端口时，它不起作用:

However when I want the pod to listen on multiple ports like this, it doesn't work:

apiVersion: v1
kind: Service
metadata: 
  name: service-name
spec:    
  ports:
  - port: 80
    targetPort: 80
  - port: 443
    targetPort: 443
  - port: 6001
    targetPort: 6001
  selector: 
    app: app-label
  type: LoadBalancer

如何让我的 Pod 监听多个端口?

How can I make my pod listen to multiple ports?

推荐答案

您有两个选择:

1. 您可以拥有多个服务，每个端口一个.正如您所指出的，每个服务最终都会有一个不同的 IP 地址
2. 您可以拥有一个具有多个端口的服务.在这种特殊情况下，您必须为所有端口命名.

在您的情况下，服务变为:

In your case, the service becomes:

apiVersion: v1
kind: Service
metadata:
  name: service-name
spec:
  ports:
  - name: http
    port: 80
    targetPort: 80
  - name: https
    port: 443
    targetPort: 443
  - name: something
    port: 6001
    targetPort: 6001
  selector:
    app: app-label
  type: LoadBalancer

这是必要的，以便可以消除端点的歧义.

This is necessary so that endpoints can be disambiguated.

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