Kubernetes Ingress www.example.com gives 404 while https://example.com works - kubernetes

Question

Does anyone know what could be the problem that i'm getting a 404 when trying to access the website via www.example.com while https://example.com works without any issues.
Here is the example of my ingress:
# Ingress
apiVersion: networking.k8s.io/v1
# make a new cert
kind: Ingress
metadata:
name: ${APP_NAME}
annotations:
kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/ssl-redirect: 'true'
nginx.ingress.kubernetes.io/from-to-www-redirect: 'true'
spec:
defaultBackend:
service:
name: ${APP_NAME}
port:
number: 80
tls:
- secretName: ${APP_NAME}
hosts:
- ${URL}
- www.${URL}
Also I tried to run
kubectl describe ingress
it returns:
host: example.com
Is there an issue with the configuration or why does the www. not redirect properly?

Answer 1

You don't specify the hosts. They need to be specified in spec.rules, for example:
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: name-virtual-host-ingress-no-third-host
spec:
rules:
- host: first.bar.com
http:
paths:
- pathType: Prefix
path: "/"
backend:
service:
name: service1
port:
number: 80
- host: second.bar.com
http:
paths:
- pathType: Prefix
path: "/"
backend:
service:
name: service2
port:
number: 80
Note: Keep in mind that TLS will not work on the default rule because the certificates would have to be issued for all the possible sub-domains. Therefore, hosts in the tls section need to explicitly match the host in the rules section.
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