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Networking Service

A Service is an API resource that defines a logical set of pods and a policy by which to access them, and is an abstracted manner to expose applications as network services.

Kubernetes gives pods their own IP addresses and a single DNS name for a set of pods. Services are used as entrypoints to load-balance the traffic across the pods. A selector determines the set of Pods targeted by a Service.

For example, if you have a set of pods that each listen on TCP port 9191 and carry a label app=MyKonvoyApp, as configured in the following:

apiVersion: v1
kind: Service
  name: my-konvoy-service
  namespace: default
    app: MyKonvoyApp
  - protocol: TCP
    port: 80
    targetPort: 9191

This specification creates a new Service object named "my-konvoy-service", that targets TCP port 9191 on any pod with the app=MyKonvoyApp label.

Kubernetes assigns this Service an IP address. In particular, the kube-proxy implements a form of virtual IP for Services of type other than ExternalName.

  • The name of a Service object must be a valid DNS label name.

  • A Service is not a Platform Service.

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