All hosts are taken by other resources

https://stackoverflow.com/a/65105771

https://cert-manager.io/docs/usage/ingress/#:%7E:text=acme.cert%2Dmanager.io%2Fhttp01%2Dedit%2D,the%20annotation%20assumes%20%E2%80%9Cfalse%E2%80%9D.

k des ing

• Solution: add acme.cert-manager.io/http01-edit-in-place to ingress

acme.cert-manager.io/http01-ingress-class: this annotation allows you to configure the ingress class that will be used to solve challenges for this ingress. Customizing this is useful when you are trying to secure internal services, and need to solve challenges using a different ingress class to that of the ingress. If not specified and the acme-http01-edit-in-place annotation is not set, this defaults to the ingress class defined in the Issuer resource.

See also

kubectl describe ingress

spec.tls, acme.cert-manager.io/http01-edit-in-place