Kubernetes-什么是< unset>服务中的港口意味着什么?

问题描述

我有一个暴露为type = LoadBalancer的服务，当我执行

I have a service exposed of type=LoadBalancer and when I do a

kubectl describe services servicename，

我得到以下输出:

Name:           ser1
Namespace:      default
Labels:         app=online1
Selector:       app=online1
Type:           LoadBalancer
IP:         10.0.0.32
External IPs:       192.168.99.100
Port:           <unset> 8080/TCP
NodePort:       <unset> 30545/TCP
Endpoints:      172.17.0.10:8080,172.17.0.11:8080,172.17.0.8:8080 + 1 more...
Session Affinity:   None

有人可以指导以下疑问吗?

Can someone please guide on the following doubts :

1.)我不明白<unset>在端口和NodePort中的含义.另外，它如何影响我的服务?

1.) I can't understand what <unset> means in Port and NodePort. Also, how does it affect my service?

2.)当我想点击某项服务时，我使用<external-ip:NodePort>点击了该服务，对吗?那港口有什么用?

2.) When I want to hit a service, I hit the service using <external-ip:NodePort> right? Then what's the use of Port?

推荐答案

未设置端口的意思是:您没有在服务创建中指定名称.

Port unset means: You didn't specify a name in service creation.

服务Yaml摘录(请注意name: grpc):

Service Yaml excerpt (note name: grpc):

spec:
  ports:
  - port: 26257
    targetPort: 26257
    name: grpc
  type: NodePort

kubectl describe services servicename输出摘录:

Type:                   NodePort
IP:                     10.101.87.248
Port:                   grpc    26257/TCP
NodePort:               grpc    31045/TCP
Endpoints:              10.20.12.71:26257,10.20.12.73:26257,10.20.8.81:26257

端口是服务将在(实际端点)上发送流量的容器端口的定义.

Port is definition of container ports that service will send the traffic on (Actual Endpoint).

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