20 Kubernetes Domain Name Service In This Year

This is best illustrated by example.

Kubernetes domain name service. If the external service has a valid domain name and you don t need port remapping then using the externalname service type is an easy and quick way to map the external service to an internal one. What things get dns names. Kubernetes gives pods their own ip addresses and a single dns name for a set of pods and can load balance across them.

With kubernetes you don t need to modify your application to use an unfamiliar service discovery mechanism. Every service defined in the cluster including the dns server itself is assigned a dns name. Luckily for us within a cluster we can reference pods by host name as defined in a spec.

Motivation kubernetes pods are created and destroyed to match the state of your. The domain name system dns is a system for associating various types of information such as ip addresses with easy to remember names. Assume a service named foo in the kubernetes namespace bar.

Assume a service named foo in the kubernetes namespace bar. You can deploy stuff your app running in the kubernetes cluster. By default a client pod s dns search list will include the pod s own namespace and the cluster s default domain.

Kubernetes dns system assigns domain and sub domain names to pods ports and services which allows them to be discoverable by other components inside your kubernetes cluster. This page provides an overview of dns support by kubernetes. What things get dns names.

An abstract way to expose an application running on a set of pods as a network service. Introduction kubernetes dns schedules a dns pod and service on the cluster and configures the kubelets to tell individual containers to use the dns service s ip to resolve dns names. Kubernetes cluster and access to it i e.