kubernetes – 服务类型之间有什么区别：NodePort和LoadBalancer

2023年12月24日 252次阅读 
apiVersion: v1
kind: Service
metadata:
  name: nginx 
  labels:
    name: nginx
spec:
  ports:
    # the port that this service should serve on
  - port: 80 
    targetPort: 80
    nodePort: 30000 
  selector:
    name: nginx
  type: NodePort

apiVersion: v1
kind: Service
metadata:
  name: nginx 
  labels:
    name: nginx
spec:
  ports:
    # the port that this service should serve on
  - port: 80 
    targetPort: 80
    nodePort: 30000 
  selector:
    name: nginx
  type: LoadBalancer

两种方法都支持负载均衡器.
端口范围在30000-32000之间,为什么？
如果我想使用端口3000,我该怎么办？

最佳答案
http://kubernetes.io/v1.0/docs/user-guide/services.html#type-nodeport：

If you set the type field to “NodePort”, the Kubernetes master will
allocate a port from a flag-configured range (default: 30000-32767).

与主机上运行的真实事物存在低端口冲突的风险.这就是为什么港口有限的原因.您仍然可以配置kube-apiserver – flag –service-node-port-range =

http://kubernetes.io/v1.0/docs/admin/kube-apiserver.html

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