What is Ingress in Kubernetes?

Ingress in Kubernetes is an object that manages external access to services within a cluster, typically via HTTP/HTTPS. It defines routing rules based on URL paths or hosts and directs traffic to the appropriate services.

Ingress allows:

• Centralizing access configuration in one place.
• Using a single entry point for multiple services.
• Configuring SSL/TLS termination.
• Implementing load balancing and URL rewriting.

An Ingress controller is required for Ingress to function, which enforces these rules at the network level.

Example of a simple Ingress:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: example-ingress
spec:
  rules:
  - host: example.com
    http:
      paths:
      - path: /app1
        pathType: Prefix
        backend:
          service:
            name: app1-service
            port:
              number: 80
      - path: /app2
        pathType: Prefix
        backend:
          service:
            name: app2-service
            port:
              number: 80

Thus, Ingress simplifies access management and routing in Kubernetes.