CKAD — Ingress Routing

Path-Based Routing

Route different paths to different Services:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: path-routing
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  ingressClassName: nginx
  rules:
  - http:
      paths:
      - path: /api
        pathType: Prefix
        backend:
          service:
            name: api-svc
            port:
              number: 8080
      - path: /web
        pathType: Prefix
        backend:
          service:
            name: web-svc
            port:
              number: 80

Host-Based Routing

Route different domains to different Services:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: host-routing
spec:
  ingressClassName: nginx
  rules:
  - host: api.example.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: api-svc
            port:
              number: 8080
  - host: web.example.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: web-svc
            port:
              number: 80

Combined Host and Path Routing

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: combined-routing
spec:
  ingressClassName: nginx
  rules:
  - host: app.example.com
    http:
      paths:
      - path: /api
        pathType: Prefix
        backend:
          service:
            name: api-svc
            port:
              number: 8080
      - path: /
        pathType: Prefix
        backend:
          service:
            name: frontend-svc
            port:
              number: 80
  - host: admin.example.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: admin-svc
            port:
              number: 80

Default Backend

Handle requests that do not match any rule:

spec:
  ingressClassName: nginx
  defaultBackend:
    service:
      name: default-svc
      port:
        number: 80
  rules:
  - host: app.example.com
    http:
      paths:
      - path: /api
        pathType: Prefix
        backend:
          service:
            name: api-svc
            port:
              number: 8080

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Next: Ingress TLS & Management →