Minikube暴露了负载输入器类型的随机端口.我可以定义特定端口吗?

Question

部署nginx(或任何此事的任何应用程序(，我尝试使用以下配置文件将其公开：

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

结果：

C:installkube>kubectl get service -l app=nginx
NAME      TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
nginx     LoadBalancer   10.108.193.215   <pending>     80:31035/TCP   21h

注意端口号31035是随机分配的。是否可以定义特定端口？

版本：

C:installkube>minikube version
minikube version: v0.24.1
C:installkube>kubectl version
Client Version: version.Info{Major:"1", Minor:"8", GitVersion:"v1.8.0", GitCommit:"6e937839ac04a38cac63e6a7a306c5d035fe7b0a", GitTreeState:"clean", BuildDate:"2017-09-28T22:57:57Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"windows/amd64"}
Server Version: version.Info{Major:"1", Minor:"8", GitVersion:"v1.8.0", GitCommit:"0b9efaeb34a2fc51ff8e4d34ad9bc6375459c4a4", GitTreeState:"clean", BuildDate:"2017-11-29T22:43:34Z", GoVersion:"go1.9.1", Compiler:"gc", Platform:"linux/amd64"}

Answer 1

LoadBalancer服务在内部使用NodePort。是的，可以为服务指定NodePort。有两种方法：

1. 在YAML规格文件中使用nodePort: 31036进行服务。
2. 运行kubectl edit <service name>，在ports下编辑nodePort字段并保存。

请记住，必须将NodePort设置为标志配置范围30000-32767中的数字。否则，Kubernetes会丢下错误。可以使用传递给kube-apiserver的标志--service-node-port-range每https://kubernetes.io/docs/reference/generated/generated/kube-apiserver/：

更改此NodePort范围：

  --service-node-port-range portRange      A port range to reserve for services
                                           with NodePort visibility. 
                                           Example: '30000-32767'. Inclusive at both ends
                                           of the range. (default 30000-32767)