问题
I am new to Kubernetes and started reading through the documentation. There often the term 'endpoint' is used but the documentation lacks an explicit definition.
What is an 'endpoint' in terms of Kubernetes? Where is it located?
I could image the 'endpoint' is some kind of access point for an individual 'node' but that's just a guess.
回答1:
While you're correct that in the glossary there's indeed no entry for endpoint, it is a well defined Kubernetes network concept or abstraction. Since it's of secondary nature, you'd usually not directly manipulate it. There's a core resource Endpoint defined and it's also supported on the command line:
$ kubectl get ep
NAME ENDPOINTS AGE
kubernetes 192.168.64.13:8443 10d
And there you see what it effectively is: an IP address and a port. Usually, you'd let a service manage endpoints (one EP per pod the service routes traffic to) but you can also manually manage them if you have a use case that requires it.
回答2:
Pods expose themselves through endpoints to a service. It is if you will part of a pod.
See here: Services and Endpoints
回答3:
- Endpoints track the IP Addresses of the objects the service send traffic to.
- When a service selector matches a pod label, that IP Address is added to your endpoints.
Source: https://theithollow.com/2019/02/04/kubernetes-endpoints/
来源：https://stackoverflow.com/questions/52857825/what-is-an-endpoint-in-kubernetes