ClusterIP service type in Kubernetes - Mini Project: Build & Apply

Create a Kubernetes ClusterIP Service

📖 Scenario: You are managing a Kubernetes cluster and want to expose a set of pods internally using a ClusterIP service. This service type allows communication only within the cluster, which is useful for internal components like databases or backend APIs.

🎯 Goal: Build a Kubernetes YAML configuration that defines a ClusterIP service exposing pods labeled app: myapp on port 80.

📋 What You'll Learn

Create a YAML file with a Service resource named myapp-service.

Set the service type to ClusterIP.

Select pods with the label app: myapp.

Expose port 80 on the service and map it to target port 80 on the pods.

💡 Why This Matters

🌍 Real World

ClusterIP services are commonly used to expose backend applications or databases inside a Kubernetes cluster without exposing them to the outside world.

💼 Career

Understanding how to configure ClusterIP services is essential for Kubernetes administrators and DevOps engineers managing internal application communication.

1

Create the basic Service YAML skeleton

Create a YAML file with apiVersion set to v1, kind set to Service, and metadata.name set to myapp-service.

Kubernetes

apiVersion: v1
kind: Service
metadata:
  name: myapp-service
# Your code here

Need a hint?

Start by defining the API version, kind, and metadata name for the service.

2

Add the service type and selector

Add a spec section with type set to ClusterIP and a selector that matches pods with label app: myapp.

Kubernetes

apiVersion: v1
kind: Service
metadata:
  name: myapp-service
spec:
  # Add type and selector here
  # Your code here

Need a hint?

The type field controls how the service is exposed. Use ClusterIP for internal access only.

3

Define the ports for the service

Under spec, add a ports list with one entry that sets port to 80 and targetPort to 80.

Kubernetes

apiVersion: v1
kind: Service
metadata:
  name: myapp-service
spec:
  type: ClusterIP
  selector:
    app: myapp
  # Add ports section here
  # Your code here

Need a hint?

The ports section tells Kubernetes which port the service listens on and which port to forward to on the pods.

4

Display the complete YAML configuration

Print the complete YAML configuration for the myapp-service ClusterIP service.

Kubernetes

# Print the YAML configuration below
# Your code here

Need a hint?

Show the full YAML content as the final output.