https://istio.io/latest/docs/tasks/security/cert-management/

https://istio.io/latest/docs/ops/integrations/certmanager/

https://medium.com/@rd.petrusek/kubernetes-istio-cert-manager-and-lets-encrypt-c3e0822a3aaf

https://istio.io/latest/docs/tasks/security/cert-management/plugin-ca-cert/ (it's performed during the installation of Istio)

https://istio.io/latest/docs/tasks/security/cert-management/custom-ca-k8s/ (developement)
