Ingress resource definition in Kubernetes - Mini Project: Build & Apply

Ingress Resource Definition

📖 Scenario: You are setting up a simple web application on Kubernetes. You want to allow users to access your app through a friendly web address. To do this, you will create an Ingress resource that directs traffic to your app's service.

🎯 Goal: Build a Kubernetes Ingress resource definition that routes HTTP traffic from the host myapp.example.com to a service named myapp-service on port 80.

📋 What You'll Learn

Create a YAML manifest for an Ingress resource named myapp-ingress in the default namespace.

Set the host to myapp.example.com.

Route all HTTP requests (path /) to the service myapp-service on port 80.

Use the networking.k8s.io/v1 API version.

💡 Why This Matters

🌍 Real World

Ingress resources are used in Kubernetes to manage external access to services inside the cluster. They provide a simple way to route traffic based on hostnames and paths.

💼 Career

Understanding Ingress definitions is essential for Kubernetes administrators and DevOps engineers to expose applications securely and efficiently.

1

Create the basic Ingress resource skeleton

Create a YAML manifest starting with apiVersion: networking.k8s.io/v1, kind: Ingress, and metadata with name: myapp-ingress and namespace: default.

Kubernetes

# Your code here

Need a hint?

Start by defining the API version, kind, and metadata fields for the Ingress resource.

2

Add the Ingress rules with host and path

Add a spec section with rules that define the host as myapp.example.com and a single HTTP path /.

Kubernetes

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: myapp-ingress
  namespace: default
# Add spec with rules, host, and path here

Need a hint?

Use spec.rules to define the host and HTTP paths. Use pathType: Prefix for the path.

3

Configure the backend service and port

Under the path, add a backend section that points to the service named myapp-service on port 80.

Kubernetes

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: myapp-ingress
  namespace: default
spec:
  rules:
  - host: myapp.example.com
    http:
      paths:
      - path: /
        pathType: Prefix
# Add backend service name and port here

Need a hint?

Use the backend.service.name and backend.service.port.number fields to specify the target service and port.

4

Display the complete Ingress manifest

Print the full YAML manifest for the Ingress resource named myapp-ingress with the host myapp.example.com routing path / to service myapp-service on port 80.

Kubernetes

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: myapp-ingress
  namespace: default
spec:
  rules:
  - host: myapp.example.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: myapp-service
            port:
              number: 80
# Display the complete manifest here

Need a hint?

Review the full manifest to ensure all parts are included and correctly indented.