I am trying to redirect my domain 'www.test.example.com' to test.example.com

in ingress i have added annotation

nginx.ingress.kubernetes.io/configuration-snippet: |
      if ($host = 'www.test.wotnot.io' ) {
          rewrite ^/(.*)$ https://app.test.wotnot.io/$1 permanent;
      }

it's not working as expected.

For testing i have try this

nginx.ingress.kubernetes.io/configuration-snippet: |
      if ($host = 'test.example.com' ) {
          rewrite ^/(.*)$ https://google.com/$1 permanent;
      }

which is working fine.

My site is working on test.example.com and ssl certificate.

Whole ingress

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    certmanager.k8s.io/cluster-issuer: wordpress-staging
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/from-to-www-redirect: "true"
    #nginx.ingress.kubernetes.io/configuration-snippet: |
      #if ($host = 'www.test.wotnot.io' ) {
        #  rewrite ^/(.*)$ https://test.example.io/$1 permanent;
      #}
  name: wordpress-staging-ingress
spec:
  rules:
  - host: test.example.io
    http:
      paths:
      - backend:
          serviceName: wordpress-site
          servicePort: 80
        path: /
  tls:
  - hosts:
    - test.example.io
    secretName: wordpress-staging