Ingress¶

Ingress provides HTTP and HTTPS routing to services inside a Kubernetes cluster.

It allows external traffic to reach internal services based on rules such as hostnames or URL paths.

Ingress requires an Ingress Controller to function.

Common controllers include:

• NGINX Ingress Controller
• Traefik
• HAProxy

Basic Ingress Example¶

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: example-ingress
spec:
  rules:
  - host: myapp.example.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: my-app-service
            port:
              number: 80

This configuration routes traffic from:

myapp.example.com → my-app-service

Common Commands¶

View ingress resources:

kubectl get ingress

Describe an ingress:

kubectl describe ingress <name>

TLS Example¶

spec:
  tls:
  - hosts:
      - myapp.example.com
    secretName: tls-secret

The TLS secret must contain:

tls.crt
tls.key

Key Concepts¶

When to Use Ingress¶

Use ingress when:

• Exposing HTTP services
• Routing multiple apps through one IP
• Terminating TLS