k8s/cluster/website/preview/ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  labels:
    app: website-preview
  name: website-preview
  namespace: website
  annotations:
    traefik.ingress.kubernetes.io/router.entrypoints: web, websecure
    traefik.ingress.kubernetes.io/router.middlewares: website-drop-www-redirect-preview@kubernetescrd
spec:
  ingressClassName: traefik
  rules:
    - host: preview.goudham.com
      http:
        paths:
          - backend:
              service:
                name: website-preview
                port:
                  number: 3000
            path: /
            pathType: Prefix
    - host: www.preview.goudham.com
      http:
        paths:
          - backend:
              service:
                name: website-preview
                port:
                  number: 3000
            path: /
            pathType: Prefix
  tls:
    - hosts:
        - preview.goudham.com
---
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: drop-www-redirect-preview
  namespace: website
spec:
  redirectRegex:
    regex: ^https://www.preview.goudham.com/(.*)
    replacement: https://preview.goudham.com/${1}