Lesson 8: Kubernetes Services

Kubernetes Services are used to expose applications running on a set of Pods as a network service. In this lesson, we will explore the different types of Kubernetes Services, how they work, and how to create them.

Types of Kubernetes Services

Kubernetes Services come in different types, each with its unique way of exposing Pods. The most commonly used types are:

• ClusterIP: This type creates a virtual IP address that is only accessible from within the cluster. It is used to expose a service to other applications running within the same Kubernetes cluster.

• NodePort: This type exposes a service on a specific port on all nodes in the cluster. It is used to expose a service to external clients.

• LoadBalancer: This type creates a load balancer for the service in a public cloud environment. It is used to expose a service to external clients.

Creating Kubernetes Services

To create a Kubernetes Service, you need to define a YAML file that describes the service. The YAML file should contain the following information:

• A name for the service
• The type of the service
• The selector for the Pods that the service should expose
• The port that the service should use

Here is an example YAML file for a Kubernetes Service:

apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  selector:
    app: my-app
  ports:
  - name: http
    port: 80
    targetPort: 8080
  type: NodePort

Further Reading

• Kubernetes Services Documentation

• Kubernetes By Example: Services

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