Is there currently any way to utilize kubernetes persistent volumes instead of a KV store in order to store Let's encrypt certificates?
From the documentation, storing let's encrypt information inside a json file cannot be used to share info across traefik pods. But I was wondering about other solutions, maybe boltdb on a shared volume?
According the official document of Traefik HA, it seems you have only one option in order traefik detect those certificates within a cluster mode.
As a Key Value Store Entry
ACME certificates can be stored in a KV Store entry. This kind of storage is mandatory in cluster mode.