Upgrading from v0.9 to v0.10
Due to changes in the way the webhook component's TLS is bootstrapped in
v0.10, you will need to delete your webhook's Certificate and Issuer
If you are using a deployment tool that automatically handles this (i.e. Helm), there should be no additional action to take.
If you are using the 'static manifests' to install, you should run the following after upgrading:
$ kubectl delete -n cert-manager issuer cert-manager-webhook-ca cert-manager-webhook-selfsign$ kubectl delete -n cert-manager certificate cert-manager-webhook-ca cert-manager-webhook-webhook-tls$ kubectl delete apiservice v1beta1.admission.certmanager.k8s.io
The Secret resources used to contain TLS assets for the webhook are now automatically handled internally by cert-manager, so these resources are no longer required.