services(kubernet)

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What is a Service?

  • An abstract way to expose an application running on a set of Pods as a network service.
  • With Kubernetes you don’t need to modify your application to use an unfamiliar service discovery mechanism. Kubernetes gives Pods their own IP addresses and a single DNS name for a set of Pods, and can load-balance across them.

What is the types Services?

  • ClusterIP: Exposes the service on a cluster-internal IP. Choosing this value makes the service only reachable from within the cluster. This is the default Service Type
  • NodePort: Exposes the service on each Node’s IP at a static port (the NodePort)
  • LoadBalancer : Exposes the service externally using a cloud provider’s load balance
  • EternalName :which will redirect a request to a domain specified in its external Name parameter:

What is the use of service named with “kubernetes” in default namespace?

  • it is a service which forwards requests to the Kubernetes master .
  • So all the requests to the kubernetes.default service from the cluster will be routed to the configured Endpoint IP.